PE_SM

TECHNICAL DOCUMENTATION

Address Mettler-Toledo AG, CH-8606Grei fenseeTelephone 01-9442211

Telelax 01.9443080Telex 826150 migch

Service manual

METTLERElectronic precision scales

Current status of the service manual, see section E. J

PEII / PE12 / PE16 / PE24PE22 DeltaRangeFE HD/ FE HD-RFE HD-2 / FE HD-2R

Accessories:GE305IGE310IGE481 GE53 I GE54option 016 / Option 017

11111111111111111111111.P701 354

Q Metiler-Toledo AG 1992 ME.701 354 Ptinfed in Switzerland 9206/8.12Edition: .kdy 1992

CONTENTS

Review of technical features

1.

2.

3.

4.

5.

6.

7.

8.

Oe5ign features

Operating functions (stand-alone balance)2.1. Standby circuit

2.2. Auto zero

2.3. Semiautomatic calibration

2.4. Unit of weight display

2.5. Stability detector and DeltaDisplay

2.6. Integration time

Specific accessories

3.1.

3,2.

3.3.

3.4.

3.5.

3.6.

3.7.

3.8.

Option 016 (Data Output + unidirectional)Option 017 (Oata Interface + bidirectional)GE305 Application Input Device

GE31O Terminal

GE48 Auxiliary Oisplay

GE53 Overhead Display

GE54 Output Module

Calibration weights

Balance P/C board

The 3 Operating Modes (Testing - Certificating - Normal Operations)

Reading-in or writing over the EAROM

Parts concept

Service tools

List of positions with special references

Exploded view drawing (PE1l, PE12, PE16, PE24)Balance parts (PE1l, PE12, PE16, PE24)Accessories for specific models (no applications) (PE1l , PE12, PE16, PE24)Exploded view drawing (FE HD)Parts List (FE HO)Packing parts (FE HO)Accessories for specific models (applications, auxiliary display,Overhead Display, output module)Identification of application P/C boards

Checking and Maintenance Instructions

Specifications-Adjustment tolerances

Defects (troubleshooting and correcting adise)Voltages

A

A

A

A

A

A

A

Al

A2

!31

62

C1. ..C4

C51

METTLER PE1l/12/16/22/24, FE HD, FE HD-2

TECHNICAL FEATURES

1. Design features

The new balances essentially retain the weighing system of The PC1616, PC16 and PC24, while the electronic

system is that of the new PE Series (P E160. .PE6000[PE6). The description of the weighing principle(ME-701754) thells you all there is to know about these balances.

Features compared to the PC1616, PC16 ad PC24:

- Weighing system: New design of scanner and temperature sensor.

- Balance P/C board: New design. Many new functions. Operating parameters are stored i a EAROM.

- Data interfaces: New design of Option(s) with specific Mettle. connecticm sockets (2 x 15-pole). Without .Option t the accessory connections will not functicm.

- ~ Better appearance and adaption of the back wall to the new data interface.

For the FE HD, BULLETIN ME-701706 must also be taken into account

2. Operating functions

(Stand-alone) for the Ser

2.1. Standby circuit

The single control bar is used to switch the balance o or off; if the power cable is connected, the electronic

system is always under power,

2.2. Auto zero

The auto zero function satisfies the calibration (certification) requirements stipulated by PTB/HB44 (OIMLguidelines ape not final at this time). The function is limited to a $mall band width. When the display isswitched on, the balance measures the Current zero position (dead weight). As so. as a load is placed on theweighing pan (weight > auto zero band width), the auto zero feature is no longer operational, even if thedisplay is reset to zero by taring.

2.3. Semiautomatic calibration

The calibration functian c?, be triggered with the single control bar. To do this, a specified calibration

weight must be placed cm the pm. This weight depends m the operating mode. The calibration factor is

stored in the EAROM and cannot be lost. However, when the bar code is read in, this factor is cancel led.

In certified balances, the calibvatim functim can be blocked by setting a short-circuit plug on sT4 (balanceP/C board).

METTLER PE11/12/16/22/24, FE HO, FE HD-2

TECHNICAL FEATURES

2.4. Unit of weight display

The user can configure the balance to display weight in any of the following units without additional peri-

pheral devices: g / kg / oz / tl / lb / dwt / ox / ct.

(This does not apply to units that are not appropriate for particular balance models).

Weight values can also be converted from any one of these units into any other unit by using one of the

GE305 applications. In certified balances, the (co version function can be blocked (same as in 2.3. ); in thiscase, the conversion feature only allows the conversion between two units which must have been configured

in the balance or in the GE305.

2,5. Stability detector and Delta Display

The functions are always in operation (except for the PE12, PE24 ad FE HD).The stability detector works with three band widths. :

- The balance is stable (ring symbol underneath sign goes out).- The balance is not stable during weighing (ring symbol is o).

The balance is. not stable during weighing-i (ring symbol is on, last decimal place (Delta Display) is bla -ked out).Please note: DeltaDisplay orIly applies to PE1l and PE16.

If the balance is Ot stable, the data output (data 1/0 socket) is blocked in the ,,Send on transfer operatingmode

2.6. Integration time

The integration time is variable, but canmt be adjusted rnaually. It is adjusted automatically, depending cmthe prevailing conditions.

3. Specific Accessories

The accessories a~e e.y important, because they let the use, expand the range of applications of the ba-

Iace.

3.1. Option 016 (data interface ~ unidirectional)

Function of the two 15-pole sockets:

The CL and the RS232C data outputs are combined in .me socket, therefore there is o switching back andforth Two coding switches make it possible to select the transfer mode (send on transfer/send continuous)and the transfer rate (300/2400 Baud).

- Connection fov GE accessories:

. GE305 Application Input Deice

. GE31O Terminal 1for special application programs

GE48 Auxiliary Display

. GE53 Overhead Display


TEcHNlcAL FEATuRES

The application P/C board can be installed by the dealer or by the user. It is supplied as follows:

a) As ,Option 016,, if the CL/ RS232C Data Interfaces are required or if a GE48, or a GE53 is to beconnected. A cable for the RS232C is packed with the P/C board.

b) As part of a Lab/ Pro/ Gem Pac I I application package, for the connection of a GE305 Application InputDevice.

c) As part of the StatPac and CountPac application packages.In so doing, it must be kept in mind that these are specific application P/C boards.

The diffevece: Different microprocessors.

. Different printer functions (GA44) which are essentially application oriented.No ?epair is anticipated in case of defect.

There is o 03 cmnection. The mw models GA24 ad GA44 are used as printers. These are operated in the

CL mode. The special transfer cables with the 15-pole connectors on the balance side are packed with these

instruments.

(The GA24 Printer ca only be used with the balance alowe, without conmcting at the same time a GE305 orGE31O).The identification characteristics of all application P/C boards are listed orI page A2 under , IDENTI FICATION

OF APPLICATION P/C BOA RDS,,.

3.2. Option 017 (data interface . bidirectional)

Function of the two 15-pole sockets:

- CL Data Output, Short circuit plugs make it possible to select the tr,msfer rate (300. ..9600 Bd) and theparity (even, odd, marked, empty).

- Connection for GE access. oives:

GE31O Terminal

GE54 Output Module }for special application programs (Data Pac)

GE48 Auxiliary Display

. GE53 Overhead Display

The application P/C board ca be installed by the dealer or by the user, It is supplied as follows:~) A, ,,OPtio 017u, if ~ bidirectional CL Data Interface is required, or if a GE48, GE53 Or a GE54 s 0 be

Connected. A cable for the CL is packed with the P/C board.

b) As part of the ,,OataPac,, application package, NO repair is anticipated i case the P/C board is defective.

There is no 03 Connection. The ew models GA24 ad GA44 are used as printers. These are operated in the

CL mode. The special transfer cables with te 15-pole ccmectors o the balance side are packed wit these

instruments,

(The GA24 Pt-inter Ca only be used with the balance alone, without Connecting at the same time a GE31O).The identification characteristics of all the application P/C baords are listed o page A2 under ,l DENT I FICA -TION OF APp Llc ATl ON P/c BOA RDS,, .

3.3. GE305 Application Input Device

A Part of the La b/ Pro/Gem Pac II application package. The set of function keys is specific to the application.Contrary to the GC301 . ..304. the GE305 cotais not only push buttons, but also electronic .mnponets. No

repair is anticipated i case the imtrument is de fectie.

METTLER PE1l/12/16/22/24, FE HO, FE HO-2

TECHNICAL FEATURES

3.4. GE31O Terminal

A Part of the 5tat/Count/ Datapa. application packages. The instrument is completely specific to the applica-tion, i.e. , there is a separate version of the terminal for each application. No repair is anticipated in case

the instrurnet is defective.

3.5. GE48 Auxiliary Display

This module is equipped with an LCD display. Results are displayed on one side. The module cm be set up

free ~tanding or mounted on a stand attached to the balance. Cable connectors are shaped like branch con-nectors. This makes it possible to attach additional connections

3.6. GE53 Overhead Oisplay

Designed for use with overhead projectors. {t is suitable for all transparency projectors, but not for thosewhich work with episcopic light (incidental light). Cable .Omecto?s are shaped like branch connectors. Thismakes it possible to attach additional connections.

3.7. GE54 Output Module

A Part Of the DataPac applicatim packagemotor). A repair/exchange is anticipated in

3.8. Calibration weights

It is used to control varIo.s additional functions (e.g. , adjustingcase of defect.

Appropriate weights are available for calibrating in the standard mode for all models

4. Balance P/C board

The model parameters, which are generally stored i a single-chip processor (ROM), are placed here in anon-volatile memory (E AROM). This standardizes the balance P/c board ?md the microprocessor (except for aspecific reference resistor R (separate P/C board) ad a Calibration-adjusting resistor R, as well as variousmanners of plugging in the ST5) ad thus makes it identical for the entire serie of models.

1 addition, the automated function check of the P/C board requires that the P/C board which is to be tested

must already be equipped with a microprocessor. For these reasons, the microprocessor is an integral part ofthe balance P/C board in this series of models. Thus, the following applies for serice:

Balance P/C boards, both ew parts or those supplied in repair/exchange, are equipped at the Mettler fac-

tory with a microprocessor (EAROM is not loaded),- The microprocessor must not be removed from p/C boards which have bee sent to Mert[er for repair/ex-

change.

ME TTLER PEll/12/16/22/24, FE HO, FE HO-2

TECHNICAL FEATURES

If the balance P/C is defective, it is intended to replace it ystematically in the .epai r/exchange program.

For the purpose of Quality Assurance, Mettler reserves the right to refuse P/C boards that have been sent in

under the repair/exchange program, if these have been mishandled.

For this reason, the serice documents in Register C O,Troubleshooting contain no reference or hints on this

level

5. The 3 operating modes

- Normal mode for not-certified balances

- Certification mode for certified / yet to be certified balances

(Eichnmde)- Test mode for certain service operations. Features:

. Calibration with full load

. No aUtO Ze,O

. PE1l and PE16 balances display the double indicated value ~ double resolution

(PE12, PE24 and FE HD ten times the indicated value g ten times the resolution)

The difference between normal mode ad Certification mode is simply the calibration weight. In the normal

mode, ,t is set to a practical due, while i the certification mode it is set according to Certification

standards.

METTLER PE11/12/16/22/24, FE HD, FE HO-2

TECHNICAL FEATURES

6. Loadinq or writinq over the EAROM

The lC4 EAROM stores the model parameters of ~ operating mode, including the weight required for calibra-

tion , as well as the calibration factor. The parameters are read in by mea~ of a ME-73592 code reader set.

There are three types of bar codes, one for each operating mode. A bar code consists of a block of 9 symbols

(O. .8), which should be read in oma after the other. The three blocks for each balance model constitute abar code table. These tables are identical on the front ad on the back, in case o. of the codes is damaged.

The ME-73592 code reader set consists of:

- An ME-73593 service P/C board, which is a data output with a special processor.

A Hewlett-Packard HE DS-3050 bar code reader with a Mettler 15-pOle connector which makes it possible to

establish a Connection with the P/C board.

The code reader set is requived i order to:

Load the EAROM after the balance P/C board has been exchangednw!nt P/C board is not loaded). I f the code reader set is defectivetive P/C board and plug it into the replacement or exchange P/C

data to be transferred.

the EAROM of the exchange or replace-

Disconnect EAROM IC4 from the de fee-

,oard. This will cause a\\ the mcess.ary

- Change the operating mode, for example, in the case of a repair which requires the test mode.

How to se the code reader set:

- With the power cable disconnected, disconnect the application P/C board (if installed) and replace it withthe service P/C baord. Connect it to the 15-pole socket (GE socket) of the code reader. Reconnect thepower cable, tare and wait for zero display.

When entering the code, leave the bar code table in its plastic cover

(to protect the code).- Hold the code reader like a thick pencil, inclined by about 15 with

respect to the vertical line.

- set the code reader down on the edge of the white paper to the

left of the code line ad run it in quick, even strokes over the code

lines, beginning with the line O (zero).

When the O line is read in, a model designation appears i the display, for example, PE24 (in the test modePE24t; in the certificaticm mode PE24E,,). starting with line 1 appears SLINE,( and the number of the sIie that is to be read in. (If this number does not change to the next higher umber after a ii. is read in,the indicated ii.. must be entered once again: Reading Error. ) After Iit! 8, the Sign *OFF, lights up. Now[are and balance will display zero. The balance is now ready m operate in the selected mode.

METTLER PE1l/12/16/22/24, FE HD, FE HO-2

TECHNICAL FEATURES

When a code is read in, the following always applies:

The calibration factor (i.e. , a correction factor that is automatically determined d.rin9 calibration betweenthe natural sensitivity of the balance and the correct weight indication) is set to equal z. This meansthat the previous calibration is lost and that the balance ~ again be calibrated. This must be done with

a calibration weight prescribed for the type of operating mode that is now read in.

The unit of weight display is automatically configured to a metric unit of weight. If the weighing is to be

done i a diffemmt unit, this unit must again be selected (according to the Operating Instructions).

In some case, the word ERROR may appear in the balance display, i.e. :

If the EAROM is not loaded (for example, after the P/C board has been replaced) or if the EAROM is de-fective.

- [f rhe code reader is defective.

Before changing a balance P/C board because a defect is suspected, You should always read in the desired

code! Because, if a service P/C board is defective, it can always be repaired under the Mettler repai. /ex -

change program. But, if the code reader is defective, o service i. offered by Hewlett-Packard (HP).

You will get reliable performance from your code reader, if you follow these simple care instructions:

- Keep tip ad small hole in tip of instrument clean.

- Unscrew tip periodically ad clean glass window of diode.

- Periodically check tip for wear ad tear. Replacement tips are available from Hewlett-Packard dealers under

the number HE DS-3001.

The improvements made in design and production have led to a simplified parts concept. The following guide-

lines apply to this concept:

- (t must be possible to repair the balance regardless of the defect- Replacement of a single part is chagig to replacement of the cornpoent group which contains the defec-

tive part.

- Single parts/component groups, which are affected in most cases where a Weighing cell is defective, remain

available as before,

- Inexpensive single parts which will remain replacement parts, will be offered in sets containing a specifiednumber of pieces,

- Cornpoets of P/C boards are not sinqle parts ( E-parts). P/c boards, whose replacen?emt under the repair/exchamge program is ot justified because of their low cost, are replaced as entire units if they are defec-tive.

- There are no replacement parts for inexpensive accessories; they are replaced as entire units.

Possible repairs for accessories ca be seen in the ,,Accessoriesna lists.

Accessories for which ma replacement parts/groups are listed, are replaced a~ entire units when there is a

defect.

METTLER PEll/12/16/22/24, FE HO, FE HO-2

TECHNICAL FEATURES

8. Service too{,

Service can be performed correctly only with the following:

- Mettler ME-73550 or 73570 tool bag

- ME-73509 adjusting set (2 distance gauges for hanger installation)- ME-73592 bar code reader set

Ohmmeter 1 kfl. ..10 kf) accurate to 100 0; low measuring voltage- Pocket calculator (desirable)

Conductive foam rubber board 1S0 x 200 mm.

Adjusting resistor set Order No:Set of 73 pieces 50ppm 56CQ. lMQ 41299

Set of 15 pieces 15ppm 3k6fl, .13k0 47042

METTLER PEll/12/16/22/24, FE HD, FE HO-2

A SPECIAL {N5T17UCTION5 A

The position numbers listed below are parts of the exploded view drawing which ~ be replaced in accor -

dance with

POS. No.

(la)(lb)(3)(5)(6)(10)(11)(12a/12b)(14)

(15a)(16)(17e/17f)(-)

the special instructions

Designation

Front glass over level indicator

Front glass Display,Pan support, assembled

Guide, Pp.,, assembled

Power line filter, cpl ./fuse holder, cpl.

Weighing system, assembled (preadjusted)Reference resistor, cpl,

Switch bracket/contro\ bar

8.1 . . . . P/C board

(inCl. short circuit plug sT4 andshaded screen for ce. tified balances)Level ,nd#cator

Guide, lower, assembled

Threaded rind/special nut

Option P/c board

t.struct, ons ,.

D6, Sect. 4.3.

D6, Sect. 4.2.

D6, Sect. 4.1.

D5, Sect, 3.2.

D7, Sect. 4.5.

D4, Sect. 3.1,

011, Sect. 5.2.

D6, Sect. 4.4.

D8, Sect. 5.1.

D7, Sect, 4.6.

D5, Sect. 3.2.

05, Sect. 3.3.

D12, Sect. 5.3.

ME TTLER PE11/12/16/22/24, FE HO, FE HD-2

iI

I

Jb k L5.=.__-_______________

,-.

Qo \@

1-

1.,

@L------

r\

I

I

\

f

\ w\_____1. EXPLODED VIEW

PEIII12176122124 1. EXPLOSIONSZEICHNUNG1. VUE ECLATEE I

ERSATZTEILS SPARE PARTS I Teil Nr.

Pos. Bezeichnung Designation alleModel Ie PE1l PE12

PE16

1 Frontglas-Set 48996Front glass set

2 Gehause-Oberteil montiertI I I 4s997 I I 48993 I I 48994Housing cover, assembled

3 Schalentrager montiert 4s905(und eine z.satzliche Zugfeder fur PE2Z/PE24)Platform support, assembled(and additional draw spring for PE22/PE24)

4 Waagschale 48972Weighing platform

q -.. Netzfilter kpl /S!chevugshalter kpl.Power lIe f,ltev, ccnnpl [fuse holder, cornpl. 148881I I I I I71Buchsentrager kpl.Socket holder. comnl. 14881I I I I I81Trafo kpl.Transformer, cornpl. 148841I I I I I9 Gehause-Unterteil montiert

I48983

Housing base, assembled I I I I I I10 Wagesystem montiert 48980

Weighing system, assembled

11 Referenzwiderstand kpl. 48985 48985 48986Reference resistor, compl.

12 Bedientasten-Set 48990Control bar set

13 Schalteinheit montiert 48991Switch unit, assembled

14 Waagen-Platine 48979Balance P/C board

15 Libel len-Set 48992Level indicator set

16 Lenker unten montiert I 48982Guide, lower, assembled I I I I I I17 I Kleinteil -Set Small parts set (17a...17l) I 48999 I 11111

Pm-t No IA I

E22 PE24

{5842/V 48995

48987

~a,w~SOzozJII!IH

sldasu!fiu!q~edL66L*zlesu!asBuny2edJaA

(Amssa>susaz.!dZ)6u!pped%.odx3L688P(6!10u~>llasZ)JaZSIOdldOdx?

uOI.le>J,odxs968%lalq>eq>s$.iodx3

:fiu!y>ed%dodx~:BunVX+dda~l,.adx~

d!a6pueHt6ZlbJJ!46pueH

6u[9JoJu!aEI862lb6un~de1sdaA

Ja~o,OuIags688ball!?H-o~aa

fieqo!lseld?Z68*W~eS-l!lSeld

fiu!pped8068iJdnx!uJe5.dalspod

:fiu!y>eduo!le.qsuouaa:6uny3edJaAouJaa

.a6LteHa~ZZ9L?6un.qn$q>Jnpe6ueqa5

(6000ZxZ)3.sM46!.Muo!leJq!le3LLC8V(6000ZxZ)zxessxqx!mag-~a!.q!ien

JaApp,mad,s6LZOSdeqa!z.aqne.mps

(z40Ies)da,vcmasn.bzz68t(x~olsz?ZIes)allnuzmu~s

(&401=)6u!molq-.wqsWI00Zsasndom!~

(W!lss!21,s)L8LOZa6eJxvwIICIZua6unJaq>!s!a,

vsnAueu.a9

pu~v=l!mleJlnauaiqe>au![-~a,mod

89988vsnSZ6L8a0Z6L8Ho9LSL8le41naulaqeXzlaN

S,apoula,,+powuo~wu%sea8unuq9raz0fJ.so~IIealle

vONWZdJNlT%L(suO!le~!!ddv6.!pw~.!IOU)(U=ww!lddvBIJ140) sIapou~!j!~adsJ04sa!.ossamv@QaqnZsaqx!4!zadsuadAL

+ 0/

*//# 1. EXPLODED VIEW

FE HD/FEHD-2 1. EXPLOSIONSZEICHNUNG1. VUE EC LATEE

A Ersatzteile/Spare parts FE HD

0s. Bezeichnung HinweiseTeil Nr. Part No.

tem Designation RemarksFE I-ID FE HD-2 FE HD-R FE HD-2R

1 Tarataste mit Kabel 45758 45758 45758 45758Tare button with cable

2 Frontglas-Set 45760 45760 45760 45760Frontglas kit

3 Tastatur mit Kabel 45757 45757 45757 45757Control unit with cable

4 Anzeigegehause-OberteilUpper display housing

) ) ) )

5 Anzeige Iatine mit yPP

45756 45756 45923N 45923NDisplay /C board with pP

6 Verbindungskabel 45761 45761 45761 45761Connecting cable

7 Anzeigegehause-Unterteil 48363 48363 48363 48363Lower display housing

8 AnzeigehalterDisplay holder

48356 48356 48356 48356

9 Gewindebuchse)

Threaded bushing) ) )

10 Fuss vorne I Frontfoot) ) ) )

11 Gehause-UnterteilLower housing

) ) ) )

12 Frontglas innen / Front glass 41591 41591 41591 4159113 Bolzen / bolt 48354 48354 48354 4835414 .Zwischenstiick I Stand off ) ) ) )15 Abdeckplatte / Cover plate

) ) ) )16 Gehause-Oberfeil

Upper housing) ) ) )

17 Schalentrager montiert 45907N 45907N 45907N 45907/vPan holder mount.

18 Waagschale 364x 228 mm 45759 45759 45759 45759Weighing pan

19 Kleinteile-Set 45762 45762 45762 45762Small parts setAbdeckglas 48373 48373 48373 48373Cover glassFusschraube 48357 48357 48357 48357Leveling screw

?0 Waagenplatine mit 45755 45755 45755 45755Mikroprozessor und EPROM, ohneReferenzwiderstandBalance P/C board with VP andEPROM without precision resistor

) Iiquidien!

Service manual 06/92

FE tiD Verpackungsteite / Packing parts A

0s. Bezeichnung HinweiseTeil Nr. Part No.

Designation RemarksFE HD FE HD-2 FE HD-R FE HD-2R

Demo-VerpackungDemonstration wac king

Unterer und oberer Verpackungs-teil (Satz) 48395 48395 48395 48395Lower and upper packing parl (set)

Demo-Hiille 45781 45781 45781 45781Demo wrapper

Verstarkung 41298 41298 41298 41298Reinforcement

Handgrift 41294 41294 41294 41294Hand grip

Verpuackungseinsatz 47997 47997 47997 47997Packing insertion

ExportverpackungFxDorf ~ac king

Exporf-Schachtel 45783 45783 45783 45783Export box

Expwt-Polster (2 Stuck notig)Export pad (2 pieces necessary) 45782 45782 45782 45782

06/92 Service Manual

Al ACCESSORIES FOR SPECIFIC MODELS: Al

Application Packages, Auxiliary Display, Overhead Display, Output Module

For the entire model line:

Orde? No, /Designation

A

6

cD

E

F

G

J

o

5

z

Option 016 Data Output(P/C board + R5232C cable set, 1,5 m)Option 0?7 CL Data Interface, bidirec[iorlal(P/C board + cable, 15/5-pole,1,5 m + S-pole cable connector)Adapter for Handkey/foot pedal

CL cable 15-5 Pol 1,5 mGA44 cable 15-7 Pol 1,5 mRS232C cable set 1,5m

Application Package for:

- Lab with GE305- Prodct,on with GE305

Gemology with GE305Statistics (5 QC11) with GE31O

- Co. ting with GE31O- Cornmnication with EDP with GE31O

Application Key set (six different keys)OtP. t Module

Overhead Display

Auxiliary Display

48330

59817

47473

479364792647927

Lab PacP,o PacGem Pac 1IstatPacCountPacData Pa.

47091

GE48

GE53

Remark

ABJ

BJ

AGJAGJAGJ5EJCEJOEJ

F

zz0

P/C board is the same in every case where A appears (interchangeable)P/C board is not available as a complete replacement component, nor are individual parts available for its

repair. {f defective, replace with ew Option,P/C board fnmn the 016 Option is, also replacement for La b/ Prm/Gem Pac 1I

P/C board from the 017 Option is also veplacemet for Data Pac.

Replacement for GE31O or take P/C board from Cout Pac.

Replacement for GE31O or take P/C board from Data Pac; P/C board also from 017 Option.

GE31O and P/C board are specifically fov the application.

They are not available .5 complete replacement parts, nor ape individual parts available for thei? repair. If

defective, order new unit.

Contains one sample of all Application Keys from Lab/P ro/Gem Pac II (replacement set).GE305 is not available as a complete rep!acemet pavt, nor are individual parts available for its repair.

Take replacement fro La b/ Pro/Gem Pac 1I

Identify P/C baords using information on ttie other side of this page.

Requires the 017 Option (59817). If defective, repair by using the exchange p?ocedure. ( 1stall 017 0p-tie. If the Data Pac is Ot being used).Replacement for GE31O or take P/C board from Stat Pac.

Requires Application P/C board A, B, C< D or S. If defective, replace with new unit. (install 016 Option,if no Application Package is being used).


A2 IDENTIFICATION OF AppliCatiOn P/c 00ARDS ?42

APPl:.arion P/C boards can be identified by:

The switch-on routine: Disconnect power-line cable and plug it back in again; display shows OFF.

8riefly press. single control bar and the balace will carry out the segment check. Then the display ,.,1(indicate the model of the built-in Option P/c board (e. g ,,016 -1,,). The the display will change to a zerodisplay.

if the Application P/c board cannot be identified from the switch-o routine (because of a defect), identify 11as follows:

- The ME umber of the P/C board (yellow Sticker), orThe ME number of the micropvocess.or, or-

The ME umber of the EPROM (where it is present).

P/C board model Switch-on P/C board ME number Microprocessorrout,, (YellOw sticker) EPROM

016 OptionP/C board from La b/ Pro/ Gem Pac 1I 016-1 48319 47998

Stat Pac 016-3 59811 59829 59814

collt Pac 016-4 59821 59837 59824

017 optionData Pac 017-1 59831 59818

Please Ote :

All ME numbers listed i this Table should be used only for identification; they .?.2 ot orde? numbers, since

none of these positions are listed individually .5 replacement parts.


B1TEST INSTRUCTIONS PE1l, PE12, PE16, PE22, PE24, FE HD, FE HD-2

CAUTION

Standby circuit. Balance is under voltage when power cable is connected!

PRELIMINARY CHECKS:

Exterior of balance; power cable; on/standby switch; tare switch; display module;measuring accuracy (configured to g or kg in the normal mode).

Model PE22, FE HD-2Check PEI1 PE12 PE16 PE24, FE HD

Hysteresis O Digit O Digit O Digit O Digit

Cornerload (10 kg test weight) i 3 Digit ? 1 Digit t 3 Digit t 1 Digit

Linearity (Calibration)UP t 2 Digit t O Digit f 2 Digit ? O Digitdown ? 3 Digit ? O Digit f 3 Digit t O Digit

At 4 kg the tolerance is O, because the balance is calibrated at that weight!

CLEANING

Disconnect power cable!

FUNCTION CHECK

Power failure protection device (OFF); overload/u nderload indicator;stability detector (ring symbol) and Delta Display. Please note: PE12, PE24 andFE HD, as well as customer-specific PE1l and PE16 work without Delta Display. ThePE22 and FE HD-2 operate with Delta Display in the Delta Range only.Peripherals*: Check functions used by customer (transfer test,

functioning of connected peripherals).

SETTING

Just recheck and readjust in the normal mode. Adjust after repairing the weighingsystem in the service mode.Important: Follow Point 6.1. General information!i on Page D13.See back of page for data and adjusting tolerances.

FINAL WORK STEPS

- If the work was done in the service mode: Again read in normal/certification mode,then disconnect POwer cable, remove service P/C board, install application P/Cboard *, and reconnect power cable.

- Calibrate balance with housing closed.- Check full load (tolerance + see Linearity above).- Reopen certified balances in order to set short circuit plug ST4.

*) If available

B2 SPECf FICA TlONS-ADJUSTMENT TOLERANCES !32

Calibration we, ghts, hysteresis, Corner load

CornerloadTest weight 10 kg 20000,0gTolevance ? 5 Dioit

PE12 I PE16 I PE24, FE HOPE22, FE HD-2

TM D) TM c) TM [7) :12,000 kg 16000,0 g 24,000 kg0,001 kg 0,1 g 0,001 kg

4 kg 4 kg 4 kg10 kg 15 kg 20 kg12 kg 120000 g 16 kg 32000,0 g 24 kg 240000 g ~

{1 Digit 1 Digit 1 Digit

110 kg 100000 g 10 kg 20000,0 g 10 kg 100000 g :

3 Digit 5 Digit 3 Digit

1 ) After calibration, place short-circuit Dlug on s.T4 (balance P/C board)

Checking linearity (test mode)

PE1l PE12 PE16 PE22, PE24, FE HD, FE HD-2#eight Display Tole?ance Weight DisPlay Tolerance Weight Display Tolerance Weight Display Tolerance

+2kg + 4000, Og *3 Digit + 4kg + 4oooog ?2 Digit +4kg + 8000, Og i3 Digit + 4kg + 4oooog ?2 Digit+2kg + 8000, Og *3 Digit + 4kg + 80000g 22 Digit +4kg +16000,0g f3 Digit + 4kg + 80000g ?2 Digit+2kg +12000,0g ?3 Digit + 4kq +1 2oooog *2 Digit +4kg +24000,0g

c1 MALFUNCTIONS (Troubleshooting) c1

General information

whenever a defect or interference is noted, try to eliminate the defect by briefly disconnecting the power

cable, Other than that, follow the indications given in the Operating ins. tractions.

Mdfnct ion Ca..e or instruction on how to repair

1 Balance cannot be switched ../off Power cable ot properly plugged in

(when the control bar is pressed. No pawev on the line. . i.dicatio appears . the display). - Microfuse is defective; vep\ace according to Operating instruc-

tions. At the same time, make sure operating voltage i. correct.

- Check connector COta t,!

Check ability to properly function of switching unil (13) andcontrol bar (12); adjust if necessary; rePlaCe if defective.

- Check voltages at transformer cpl. (8) according to Paqe C51(measure). ReP1ace if defective.Check voltages at balance P/C board , according to Page C51

(measure). With PE24 and FE HD: Make s.re 5T5 i, Plu99edin correctly (2 - 3). Replace the P/C boa. d if defective.

2 Indication OFF lights up on display - Previous power failure; press control bar.

Please Ote, - When balance was switched on, control bar was not pressed downBalance with an ME-48860 P/C board completely; press control bar.

do not indicate OFF, but rather - Operating voltage is incorrectly set (this type of error may only-O FF-. become apparent when power fluctuation. occur); see OperalingReason: special software Instructions.

3 O(Y the PPeF segments of the - Operating errov:.mbers light up The weighing v.ange has bee exceeded

4 The uPPet- segments of the numbers- 0peratin9 error:

light up before the end of the The display was switched on without the weighing pa. ha. ig

we, ghig range is reached. been placed on the balance, or the weighing pan was ot empty

when the display wa5 switched 0.

5 Oly the Iowev SeQIne. t5 Of the Operating error:numbers light up, The pan support or weighing pan is missing,

- Reference resistor, cpl. (11 ) is ot connected to sT7 of balanceP/c board (14), or is defective.

6 After the segment check, the balance The scanning cable at ST6 of balance P/C board (14) is notdisplay begins to co. t backwards plugged i, or it is defective. If the scan. ig cable is defective,

and after about 1 minute, OIY the the enrire weighing system, .Xsembled (10) must be replaced.lower segments of the urnbe,s are on

METTLER PE11/12/16/22/24, FE HD, FE HD-2

C2 MALFuNCTIONS (Trouble shcmling) C2

Malfunction Cause or instruction. on how to repair

7 Certain segments or Display is defective. Check by switch-on test of balance (brieflysymbols do not light up. disconnect power cable). If the switching-on test 1s negative,

balance P/C boavd (14) must be replaced.If the switch-on test is pos, tive, there W.. a momentary rnal -

fuction

8 Desired unit of weightcannot be selected.

9 Balae cannot be calibrated

(display indicates 6.. CAL,).

- Balance is certified (short circuit plug is on ST4 of balance P/Cboard (14).Balance P/C board (14) is de fectie. Recheck by means ofswitch-on test (briefly disconnect power cable).P(eas.e note:Only units of weight that are logical for this balance model can

be selected (c .. only be selected in PE1l and PE16).

- Calibration weight is WIO Q. Repeat according to the OperatingInstructions.

Calibration weight is o. k. , but the balance is not in the correctmode (see data, adjustment tolerances on Paqe B2),Balance is certified (calibration has been blocked by short circuitQlug 5T4 o balance P/c board)Adjusting resistor R, on balance P/C board (14) ,s missing orincorrect (see D1O, Point 5. 1.4.)Balance P/C board (14) is defective.

70 Di~P\ay ind,cate, Er, or

L, MuLkuNL 1 IONS [ Troubleshooting) C3

Malf. net, on

16 value remains blocked in display,

17 Elalance cannot be taved

(no zero is displayed).

18 After being tared, display

remains dark (only the stabilitydetector lamp is still on).

19 PE1l, PE16: display indicates double

the weighing value.

PE12, PE24, FE HD: display indicates

ten times the weight value.

20 Hysteresis > f 1 digit.

Cause or instructions on how to repa, r

Momentary functional defect; disconnect Power cable and Dlug itin aga, n.

- Switch unit, assembled, (13) is out of adjustment or de fettve- Single control bar (12) is out of adjustment or defective.

Weighing table is not stable; weighl. g object IS restless; room isdrafty

Balance is in test mode; read in normal mode or certification mode

Plastic cover is touching; press down at adhesive spots.

- Loose screws in weighing system (10).Bearings of weighing system (10) are bent or misaligned.Parts of weighing system (10) are touching or brushing.Weighing system (10) is defective; replace it.

21 Cornerload cannot be adjusted. - Fastening plates (209) must be ploos,et?d for .diusting work.Cornerload screw (17f) or threaded cod (17. ) is not correctlyis.tailed.

- Flexible bearings at guides (5) (16) are bent or misaligned.

22 Linearity cannot be ad fusted

within tolerance.

23 Balance is drifting

24 NrJ data transfer,

Cornerload is not adjusted- Loose screws in weighing system ( 10)

Parts in weighing system (10) are bent or misaligned.Potentiometer R57 is defective; rwplace balance P/C board (14)

Preadjustment of TC was not arried out.- TC sensor in weighing system (10) is defective; replace weighing

system

- Balance P/C board (14) is defective.Please note: 1 field service, preadjustment of the TC is. the onlyremedy against drifting. A perfect adjustment is. only possible withthe eniromental chamber (at Mettler Greif ensee).

The balance has o built-i Options.

The wrong Option is built in; see Page AZ.,,ldetificatio of application P/C boards.

Balance is connected to the wrong terrnialP/C board 016-1 + GE305 Application Input Deice

P[C board 016-3 . GE31O Terminal, StatPacP/C board 016-4 + GE31O Terminal, CountPac

P/C board 017-1 + GE31O Terminal, Data Pac

METTLER PE1l/12/16/22/24, FE HO, FE HO-2

C4 MALFUNCTIONS (Troubleshooting) C4

Malfunction Cause or intructions on how to repair

Connection cable or power cable of peripheral instrument i. not

pl. Qged in.

Weighing table is not stable; room is drafty; weighing object ,srestless.

Data receiver is not ready to operate or defective.

- Connection cable at Option P/C board (inside the balance) is notPlugged In.


u,,

DC2S...,6V ti=+j

.C4D:5:3::::::U=S-DC9,5. ..11,5V I I [W)l :

ov (GXD)

DC 5,8..

AC8. .,11L: uAC4. ..?V?V

5econdary voltages of the power transformer

Secondary voltages depend on the local power Iie voltage; a tolerance of ? 10 % of the nominal value ,s,

admissible

- These secondary voltages c. be mess.md at connector bar ST1 :

Measure Pin 1 against Pin 2 in the alternate voltage range (AC).Pi 3 . codinq plug.

Measure Pin 4 against Pi 5 in the alternate vcdtaqe range (AC ).Measure Pin 5 agaixt Pin 8 in the alternate .oltage range (AC).Measure Pin 7 against C5- (O V/( GND)) in the direct voltage range (DC).

Direct voltage,

Measure the voltages i the direct voltage range (DC) accordinq to the drawing; in this case, grounds i.C5-(OV(GND)).


CONTENTS

Repairin Q and ad fus.ting the balance

1. Explanation of the procedure

2. Preparations

2.1. Work station: tools

2.2. Service position of the balance P/C board

3. Repairing the weighing system, assembled

3.1. Replacing the weighing system, assembled (10)3.2. Replacing the guides, assembled (5) (16)3.3. Replacing special nut (17f) and threaded rod (17e)

4. Making repairs outside the weighing system, assembled

4.1. Replacing the pansupport, assembled (3)4.2. Replacing the front glass of Sidicator (lb)4.3. Replacing front glass (1a) over the level indicator4.4. Installing single control bar (12b) with switch bracket (12a)4.5. Replacing power line filter, cpl. ,/fuse holdev, cpl, (6)4.6. Adjusting level indicator (15a)

5, Electronics

5.1. Replacing balance P/C board (14)5.1.1. General information

5.1.2. TC preadjustment5.1.3. Transfer of soldering bridges

5.1.4. Voltage +25 V/+35 V

5.1.5. Preadjusting the calibraticm5.1.6. Short circuit plugs and rnaskig screens

5.2. Replacing the reference resistor, cpl, (11)5.3. Replacing the Option P/C board (-)

6. Adjusting6.1. General information

6.2. Hysteresis check

6.3. Cornerload

6.4. Linearity

6.5, Calibrating

Appendices

Schematic diagramsBar code tables

D1

02

03

D3

03

04

D4

05

D5

D6

D6

06

D6

06

07

D7

08

08

08

09

010

010

D1O

011

011

012

013

013

013

D14

D15

D17

E

F


D2 1. EXPLANATION OF THE pROCEDURE D2

To ensure efficient procedures in the caxe of instrument repairs, Section D has been subdivided i.~o .e -er-al part, :

Prepar.3t10n.

Repairing of the weighing system, assembled

Making repairs outside the weiqhinq .ys. tern, assembled

- Elect rmn,cs

Adjusting

- Additional detailed drawings, with position designations from (201 ) on support all critical points of the pro-cedure.

Unfold exploded view drawings.

Carry out troubleshooting according to Section C,.- It is prohibited to disassemble the balance any further than described in the Service Manual.

- When repairing positions with special instructions (see List of positions with special instructions i sect; . .A), make sure You observe these instructions.

METTLER PEll/12/16/22/24, FE HD, FE HD-2

D3 2. PREPARATIONS D3

2.1. Work station; tools

The heart of every measuring cell is a strong magnetic system whose alr gap is the cause of a stray field in

which the compensation coil must be able to move freely. This stray field is capable of attracting magnetizable

particles and floating matter within a certain distance and guiding them to the air gap. [t is hOPeless to re -Pair a bala..e . . a table where such Particles have settled. Therefore, the following aPPlies as a matter ofcourse:

Before beginning your work, clean your work station with,. a sufficiently large arealf away from your work station, remove dust before opening the balance.

0. not leave open balances unprotected for longer periods of time; cover with paper.

Keep tools ad tool bag clean.

2.2. Service position of balance P/c boa?d

If encessary, the balance P/C board can be rnoed bak slightly

to make work easier.

Important reminder: Do not work with loose P/C boards, since

ground connection i. no longer assured {nthis case.

Disconnecting the power cable

Unscrew fastening screws of the balance P/c baord,

Position balance P/C board (14) o opposite holes.Attach screws and geav wheels.

When rnoig the balance P/C board back to its original posi-

tion, cover contact surfaces with heat-conducting paste (fromthe Mettler tool bag), if eces. sary.


04 3. REPAIRING THE WEIGHING SYSTEM, ASSEMBLED D4

3.1. Replacing the weighinq system, assembled (10)

Whenever work is being done at the weighing system, the system has to be disassembled, except for adjust-ments.

- Separate balance from power line.

Disconnect power able

Reason: Whenever the power cable is Connected, the balance is under power (z-landby operation).

- Loosen connection between weighing system and balance P/C board.Pull out coector of flat band cable (204) from 5T6 of balance P/C baord (14).

Loosen attachment of weighing system:

1 Pull balance over edge of table unt,l ,c,.w5 (205) are aces -

) ,Ible.Unscrew SC,~WS (205)Push balance back.

Lifting out the weighing system

Grasp long sides of weighing system (206) and lift system ..1of balance housing. At the same time, make sure mmnector of

scanning cable (204) does not get caught in feed Lhrough(207) of the lower balance housing.Place weighing system in same position.

Install new weighing system in reverse order

METTLER PE11/12/16/22/24, FE HO, FE HD-2

D5 3. REPAIRING THE WEIGHING SYSTEM, A5SEM8LED D5

3.2. Replacincl the assembled quide~ (5) (16)

behind ah e.d

.

. 0 0 0

; .412=

Disassemble weighing sys.rem (10) according to the instruct, onzfound on Page D4.

Remove coupling (211):Loose the LIpPer bolt (208).Loosen the lower bolt (210) and remove it.Reove the upper bolt (208).Put these parts in a safe place.

Replace guides (5) (16):Loosen all front screw. (5a) (16a) on the guides (eachguide has 3 x 2 screws).Slide the two spacer gauges From Adjustment Set 73509with the nmuting slot. facing down, in between Lhe finished

5urface5 of the middle of the hanger ad those of the ..s1

housinq of the weighing system (pointed towards lhe frontflexible bearings).Lightly secure the hanger and weighing system using the

two M5 x 22 screws on the front through the middle of the

hanger o the cast housing of the weighing system (space:9,5 mm).

. Remove the two bolts (5. ) (16a) of the defective guides.Remove the defective guides.

Install the new guides; center them and fas. te them with bo(ts (Sa) (16a) an lock washers; then tightenall bolts (5a) (16a).Remove the two M5 x 22 S.C~eW, used [o secure the hanger; carefully remove the two spacer gauges.

- Assemble coupling (211):Assemble coupling (211) (with long hole towards the bottom); lightly tighten the bolts.Tighten the _ bolt (208) on the round hole of the coupling.Measure the space from the rea? flexible bearing to the cast housing (e.g. 2 mm).Transfer this space to the front flexible bearing (e.g. by using a 2 m hex socket-head bolt) so thatthe parallelogram is rnaintaied. Now tighten the lower bolt (210) on the Ionq hole of the co. pli.c.

- Adfust [he scale according to the instructions found on Page D13, Point 6.

3.3. Replacing special nut (17f) and threaded rod (17e)

Remove guides (5) (16) according to Point 3.2.- Loosen the two upper screws of the two fastening platez

(209), (do not unscrew).- Loosen ad unscrew threaded rod (17e) and special nut (17 f).- Screw in special ut (17f) to the adjacent measured height

(71 ? 1 mm).Screw in Ihreaded rod (17e) without special ut (17f) t.ruingat the same time.

- Tighten threaded rod (17e) with a torque of 260 N.m(.26 kpcm)Ad[ust di~tance of bearing points to 72.5 z 0.2 mm by turningspecial ut (17 f),

- Adjust balance according to instruct,os on Page D13, Point 6,


06 4. MAKING REPAIRS OUTSIDE THE wEIGHING SYSTEM, ASSEMBLED D6

4.1. Repla. inq the par! sup port, assembled (3)

When replacing a pan support, axsembled, the following is to be noted:

If the replacement affects a PE24 or a FE HD, the draw (tension) spring supplied with the pan supporlshould be hooked on parallel with one of the two built-in standard draw springs (using the spring [ens Ionhook from the Mettler tool bag).Reason: The larger weighing range requires a higher resistance until the overload protection feature be-

comes effective.

The extra draw (tension) spring must not be isntalled in the PE1l, PE12 and PE16, because the overloadprotection function would not be triggered at the right moment.

front glass set (1 )

4.2. Replacinq the front glass of indicators (lb)

If the front glass is broken, please clean the contact surfaces, ~o that the new front glass can be installed

correctly

- Cement front glass (lb) in mask of upper housing (using cement from the Mettler tool bag).Carefully 0,,ss locking plate onto locking bolts.

4.3. Replacing front qlass (1a) oer the level indicator

If the fr-ot glass over the level indicator is brocke, please clean the contact surfaces.

Cement front glass (1a) into place (.sing cernet from the Mettle. tool bag).

Single control bar set (12)

4.4. Installing single control bar (12b) with switch bracket (12a); aligning the s,ngle control bar

Single control bar (12b) is equipped with a snap closure, so that switch bracket (12a) must be pressed intothe corresponding openings until the switch bracket can be heard to engage.If the two gaskets (12d) are installed at a later date, it is necessary to carefully and exactly observe theinstallation position, otherwise it will o longer be possible (or almost impossible) to correctly tare thebalance.

- When tightening screws (12.), make sure the control bar is centered and switch unit (13) is correctly trig-gered.


07 4. MAKING REPAIRS OUTSIDE THE WEIGHING SYSTEM, ASSEMBLED D7

4.5. Replacing power line filter, cpl. / fuse holder, cpl. (6)

in ordev to remove the power line filter or the fuse holder, ,t

,5 nece5sary to unsolder joint L of the copper conductorwire at the power line filter.

All other connections can be plugged or screwed in or out.

Level indicator set (15)

4.6. Adjusting level indicator~

Place auxiliary level indicator (from Mettler tool bag) on floor of lower balance housing (or on the wei Qhingsystem)

- Level balance.

Adjust level indicator with the three screws (alternately loosen and tighten screws .til air bubble is incenter of circular marking.

ME TTLER PE11/12/16/22/24, FE HD, FE HD-2

D8 5 ELEcTRONICS 08

5.1. Rep\acinq balance P/c board (14)

5.1.1, General information

Store P/C board in its wrapping until it is being inlal led. The reason for Ibis ,s that various elements COu!d

be destroyed by electrostatic charges.Ho to rePlace:

a) Disassemble defective P/C board; do not change adjustment of potentiometers RS7, R58 and R59; do notremove any elements (except the calibration adjusting resistor); do not seer ay conductor wire. .

b ) Measure TC adjustment and transfer it to replacement PIc board ( R58/RS9)For this, see Point 5.1.2. TC preadj. stmeta.

.) T?ansfer soldering bridges.For this, see Point 5.1.3. ,,Tras f,, of soldering brid9 es.

d) With PE24 and FE HD balances: Change short circuit plug sT5 from 1 2 to 2 3. For this, see Poin L5.1.4. Vo!l age +25v I+35v {5.

e) install replacement P/C board; read i. test mode.f) Preadj. sC calibration.

For th, s, s... Point 5.1,5. ,Preadju sting the calibration.g) Check/adjust cornerload; check/adj. sl linearity (potentiometer R57).

For this, see Point 6.3. CoPer)oad and Paint 6,4. Linear ity,.h) Read in ,Normal mode or Certification mode and calibrate accordingly with balance housing closed.i) If necessary, select a different unit of weight.k) If necessary (certified balances), rransfer short circuit plu~ from defective P/C board (ST4) to replace-

rnet P/C board.

For this, see Point 5. I.6. ,Short circuit plugs.

1) If necessary (certified balances), stick shaded screen on last indicated decade.For this, see Point 5.1 .6. Shaded screens

m) Send ,n defective P/C board without lhe mis~ing elements (except for short c,rcwt plug ST4 and shadedscreen) for Repair/Exchange.

METTLER PEll/12/16/22/24, FE HD, FE HO-2

09 5. ELECTRONICS D9

5.1.2. TC preadjustment ( R58/R59)

(n the field, replacing is the only possibility of oreadju, ring the TC.This assumes that the TC adjustment of the defective balance P/c baord (14) was correct (i .e. that the fac-tory setting had ~ been changed).

1. TC preadiu.tment, the following must be noted:

Do ot sever conductor wires; do not remove elements (except for the calibvatio. adl.. tree. t resistor Rsee Page D1O, Point 5.1.5.).if the capacitors are charged (eve by electrostatic t?as.f e?), this will cause incorrect results.

First press the bottom of both P/C boards o conductive foam rubber for the purpose of discharging

them.

After that, ad also during measuring and adjusting, the bottom of the P/c boards must not be touched(P/C boards should only be held by their frout).

Immediately repeat every measurement with the ohmmeter poling reversed.

Write dew al! fov measurement values of te defective P/C board in the form of a table; after that, .150

write down the values provided by the m?pla.ement P/C board (see example).

defective 1)

RePlacernent 2)

defective 3)

Replacement 4)

Measurement

values

AB = 10,7 kflAC = 7.7 kfl

AB = 10.5 kf)AC = 7.5 kfl

DE = 4.9 kflDF = 6.4 k(lDE = 5.2 k~DF = 6.8 k!l

AB59 E

Ratios

1.39

1.40

. . . . .

. . . . .

0.766

0.765

Explanation

1 ) Measure R59 AB ad AC of the defective P/C board ad divide ~c , = ratio 1 .39.

2) Adjust Ieplacernet P/C board R58 in such a mannev that ~ is as close as possible r. the ratio 1.39

Because of manufacturing tolerances, this is not possible with the same res. istace values as in case 1 ):If in case 2) we set AB also to 10.7 kfl. AC become,, for example, 7.2 kfl, thus (he ratio ~ = 1.486,i, too large.

If we now reduce A8 to, let u, say, 10,5 kfl, AC becomes 7,5 k(l, and the ratio is reduced to 1,40. Thisis sufficient for our propose.

~

1,39 = 1.007. This corresponds TO an error of < 1%. A factor of 2% is admissible.

3) and 4) Adjust R58 in such a manner that a ratio of 0.766 is created. This is the case in the example withDE = 5.2 kfl and DF = 6,8 kfl.


D1O 5. ELECTRONICS D1O

5.1.3. Transfer of soldering bridges

Soldering bridqe COMMA,,

At the front edge of the P/C board, underneath the display, there is a soldering bridge *> which ,s de-

signated comma. If this point on Lhe de feet,.. P/C board is connected through, the same po, nt of the

replacement P/C board must .!s. be short-circuited with a drop of soldering rnatemal

This will cause the comma to also shine through under the decimal point (i certain countries this 1s a re-quirement, partly for certified balances only).

5.1.4. Voltage +25 v/+ 35V

At the factory, short circuit plug 5T5 is xet to the 1 2 position (+25 V).For the PE24 and FE HD, this setting must be changed to the 2 - 3 position (+35 v). (Please observe theinscription on the balance P/C board. )

5.1.5. Preadjusting the calibration

FOF safety reasons, the semiautomatic calibration procedure is structured in such a manner that only small

calibration errors can be corrected.

- The weight indication of the uncalibrated balance is accurate to 2 %,

If for same reason a weight indication is not within this tolerance, the tolerance can be reduced with an addi-

tional adjusting resistor R. ..:

RSolder in adjusting resistor between LA1 .LA2 (with powercable disco ected),The talc.{atio is made according to the following formula:

1

Calibration (test) weight (g)Adjusting resistor (()) . Reference resistor ((l)

Calibratio error (g)

Use only /4 W metal film resistors with temperature coefficients prescribed as follows:

Resistors smaller than 15 kfi: rnax 15 ppm/ C.

Resistor series ME-47042; 3.6 kO. ..13 kll

Resisto?s 15 kfi and larger: 50 ppm/ C admissible

Resistor set ME-41299, 560 n. ..1 MO.

Attent, on: The values between 560 n and 13 krl should not be useo i these PE balances, because 50 ppm/ C !

If no correspondig value is available the resulting value c. be combined from two larger (parallel) values.Values of the reference resistors:

PE1l = 240 0; PE12 = 240 Q; PE16 = 180 ~; PE24, FE HD = 120 ()Calibration (test) weightAny weight appropriate for the mode that is bein~ used.


D1l 5. ELECTRONICS Dll

5.1.6. Short circuit pluqs and rnaskinq screens

when set, short circuit plug ST4 will block the calibration and selection of units of weight (required ,. ce,--tified balances). If the last digit of a P/C board of a certified balance is covered with a masking screen, thisdigit must also be covered when a replacement P/C board is installed.It is not possible to get replacement P/C boards that are equipped with masking screens and short circu, t

plugs. Order numbers:

- Short circuit plug, 2-pole -87861

Masking ,creens (49 pieces) -42446

5.2. Replacinq the reference resistor, cpl. (11 )

General information

When this component is replaced, the contact surfaces should be coaled with heat -cod. ctiq paste (from theMettler tool bag), if necessary.

Important:

If a parallel resistor (adjusrin Q ?es.istor) to the reference resistor is to be soldered i as a newlreplacernentpart, it might be necessary to unsolder the .alibratio adjustment resistor (see Page D1O, Point 5.1.5. ) fromthe balance P/C board (make SLIT. power cab{. is discoected).I. this case, Preadj.sting the calibration rnetioned on Page D1O, Point 5.1.5. is eliminated.

METTLER PET1/12/16/22/24, FE HO, FE HD-2

D12 5. ELECTRONICS D12

5.3. Replacing the Option P/C board (-)

General iforrnat ion

when replacing an Option, make sure that the .hort circuit plug (jumper) and .1( other switches are rel. v.edto the positions required by the customer

1. addition, we refer you to:

- Option 016 . install ario Instructions ME-701237 ad Operating tstructionz ME-701806

(for 5tatPac/Co. ntPac, as well as Additional Sheet ME-701288)Option 017 . Installation Istr. ctions ME-701471 and Operating Instructions ME-701806

ME TTLER PE17/72/16/22/24, FE HO, FE HD-2

013 6. ADJuSTING D13

6.1. General information

Please note:

When adluzt,ng work is performed, the balance is under power t

Preparations:

Read i. test mode (auto zero switched off)!

Before readi. q in a new bar code, please note:

Some PE balances are equipped with customer-specific software. These balances can be recognized by the fact

that they have an ME umbev on EAROM IC4 of balance P/C board (14). {. these cases, only another bar codemay be read in, provided the corresponding special bar code table (optional) is available.Otherwise, all ,Cored values are irrevocable lost.

6.2. Hysteresis check

Before any adjustment is made, [he weighing ~y~terr must be checked to make sure it is osci(latig(swinging-in) freely according to a) and b).

a) Check for mechanical friction or instability:Tare; then, using a b?ush or a loosely held pencil, exert light p,es. sure (several digits) an the weighingPan; release witho. r jerking; read display.

- Tare; slightly raise weighing pa (several digits); gently let pa slide back into position; read display.A correctly prepared balance will indicate a difference of O to 1 digit (in the test mode). If not, checkfor touhing and brushing.

b) Check for mechanical jamming (flexible bearings):- Place full load i center of weighing pan and tare; move load to rear edge of weighing pa; read res.lt;

move load to front edge of weighing pa; read and compare res..lts

If there is a symmetrical deviation, i.e. , an approwmately equal amount of digits towards plus or minus

starting from zero, we are only dealing with a corner load errov which will be discussed in the next .hap -ter. But if the deviation towards plus 0? mi. s is clea?ly .neve, this indicates a rnecha ical jamming ordamage in the weighing system. I. this case, the proper installation of guides (5) (16) must be checked.


D14 6. ADJUSTING D14

6.3. Covnerload (in the test mode)

A 10000 Q weight is needed to adjust the Cornerload

L!!EIl~_.

0~.: ------------

0 f.. 00

\;.. ::.L::------ : ._._~

o

The adjustment is. done by turnin~ the screws that are desig-nated with an arrow in the adjacent drawing,

Procedure:

Place 10000 g weight in center of weighing pan.

- Tare.

Diagonally move weight on weighing pa to the edge of the

pan.when weight is at the corner points, write down indicated

value and sign in front.

- Always correct largest deviation accord, ng to adjacent dra-wing. For tolerances, see table below.

After every correction , weight must again be placed i. the

center and balance must be tared again.

Cornerload tolerances:

PE1l PE12 PE16 PE24/FE HD

Digit: *5 *3 f~ 13


015 6. ADJUSTING D15

6.4. Linearity (in the tes, t ~ode)

To adjust the linearity, (t $s necessary to have two he, ghts, each of which corresponds to half the load .,the we, ghing range.

&old, tional weights are needed for control purposes (see table Checking the lieacity> at the back of ~hl,page).

Procedure

First calibrate the balance in the test mode a.cordi. ~ to Point 6.S. , Page D17. This way, Che Center ~a be

set ,. a very s,mple manner with potentiometer R57,

Tare balance when no load is on the pan.

Place first weight on pa (with PE24 . 12 kg) and read indicated value.Remove first weight, place second weight o pan (with PE24 . 12 kg) and tare.Add first weight to second weight and read indicated value.

Important:

\Vhe proceeding in this manner, the first weight must not be iterchaged with the second weight, sincethese two weights are subject to diffe?ent tolerances which may have a neqative effect on the result.

- Correction

With potentiometer R57

Tolerances

.) 2 x resolution PE1l PE12 PE16 PE24, FE HD0) 10 x resolution

~ TM . display in test mod.

Li.cavityTM o) TM q) TM o) TM D)

center point, on:, test weight S kg 10000.0 g 6 kg 60000 g 8 kg 16000,0 g 12 kg 120000 g

tolerance t 1 Digit f 1 Digit f 1 Digit t 1 Digit

Ist ValUe smaller than 2nd: Tui-n Counterclockwise

2.d value smaller than Ist : Turn clockwise

METTLER PE1l/12/16/22/24, FE HO, FE HD-2

D16 6. ADJuSTING D16

Since calibration is later done !. the normal mode with a uniform weight (4 kg), it is now necessary to d,s -place the Iinear, ty curve , suh a rnaner that the balance is sure to ,ndic ate the correct weight (wrthr.1.$,,.,,), eve under full load.

Please note: For certified balances (which are not calibrated with 4 kg), this section can be disregarded,

Procedure (after setting the Centev)

Tare balance with no load on the pan,

- Place test weight (4 kg) on pa (balance still i test mode).

Correction

Again with potent iornetev R57Tolerance,

0) 2 x resolutionc) 10 x resolutionTM = display i test

Linearitycenter position:

test weighttolerance

mod e

I

PE1l

TM 0)

4 kg

PE16 I PE24, FE HDII TM.) I I TM 0) I

8000.0 g 4 kg 40000 g 4 kg 8000.0 g 4 kg 40000 gO Digit O Digit -~ Digit O Digit

when this tolerance is maintained, the balance will indicate the Cav?ect weight (within tolerance), even .derfull load.

1

Checking the linearity (test mode)- Calibrate balance, then recheck linearity!

kTtPE1l

Weight Display Tolerance We, ght

+2k9 + 4000. Og t3 Digit + 4kg+2kg + 8000. Og i3 Digit + 4kg+2kg +12000. Og ?3 Digit + 4kg+2kg +16000. Og *3 Dig, t - 4kg+3kg +22000. Og ?3 Digit 4kg-5kg +12000. Og f5 Digit - 4kg-6kg O.Og t5 Digit

I I I I

PE12 PE16 PE24, FE HDDisplay Tolerance Weight I Display lTolera.ce Weight Display lTolerace

+ 400009 ?2 Digit +4kg+ 80000g ?2 Digit +4kg+120000Q ?2 Digit +4kg+ 80000g t3 Digit +4kg. 4oooog *3 Digit -8kg

Og *3 Digit -8kg 1+ 8000. og i3 Dig, t + 4kg+16000. Og f3 Digit + 4kg+24000. Og t3 Digit + 4kg+32000. Og *3 Dig, t + 4kg+16000. Og +5 Dig, t + 4kgO.Og *5 Digit + 4kg-12kg-12kg+ 4oooog ?2+ 80000g ?2+1 2oooog ?2+1 60000g *2+2000009 ?2+240000g $2+1 Zoooog ?3

Og ?31DigitDigitDigitDigitDigitDigitDigitDigit

METTLER PE11/12/16/22/24, FE MD, FE HO-2

017 6. ADJUSTING 017

6.5. Calibrating

Test mode,

Disconnect power cable

- Remove built-in application

P/c board (where present)and install service P/C board

instead.

Plug in power cable; connect

code reader to GE socket;

sw, th on d,splay.

- Read in test mode (described in,Techn ical fea Lures, Point 6).

- Press single control bar until

---- appears; relea5e COntrO\bar, display changes to CAL.

Place calibration weight . pan:

PE1l PE12 PE16 PE24/FE HO

11 kg 12 kg 16 kg 24 kg

Wait for weight value to be

displayed.

- Remove we, ghts.

- Perform ad fustig steps o? see +.

- Change operating mode (to certi-fication mode or normal mode).

Certification mode:

If service P/C board is not

yet installed, arry out thefirst three points of lb.

Test mode column.

Connect balance; read in

certification mode.

- Press single control bar until

----- appears; releasecontrol bar , display changes

to CAL,,.

Place calibration weight on pan:

PE1l PE12 PE16 PE24/FE HD

10 kg 10 kg 15 kg 20 kg

Wait for weight ale to be

displayed.

- Remove weights; disconnect

POwer able; reopen balance.

- Remove service P/C board

ad reinstall application

P/C boavd (if present).

- Install short circuit pluQ adrnaskig screen (if necessary).

Close balance housing; plug

, power cable; recheck,

Uormal mode:

lf the service P/C board is not yei

,stal led, carry 0.1 the first three

>oits of column Test mode.

Read in normal mode.

- Disconnect power cable; remove

serice P/C board and againinstall application P/C board

(if present).

Close balance housing; plug in

POwer cable; .wftch O. displa Y

Press single control bar until

----- appeavs; release otrol

bar, display changes to CAL,.

- Place 4 kg calibration weight .

pa (for all models).

Wait for weiqht value to be

displayed.

Remove weights;

balance is now calibrated.

- Check full load (toleranceaccording to Page B1

Linearity $

Service bulletins

Is my service manual really up to date?A t the bottom right of the title page you will find the date of issue. If you know the date of the latest edition,you can thus see whether your service manual is up to date.If this is not the case, the latest service bulletin has not been filed. (The service bulletins represent acontinuous supplement to the service manual and keep it up to date.)The service bulletin always includes a new title page for the service manual, new pages and pages to beexchanged, as well as a new contents page for section E. All these documents have the same, latest date ofissue at the bottom of the page.

First edition of the service manual PE / FE HD / FE HD-2: Marcht984 (03/84)

Contentssection E Date of issue

1.

2.

3.

4.

5.

6.

Service Bulletin ME-701 706 03/84

FEHD Waage / FEHD balance/ Balance FEHD

Service Bulletin ME-701 763 08/84

PE16: Special Fastmade bar cade far faster weighing-in

Service Bulletin ME-701 636 11184

PE22; FE HD-2; different

Service Bulletin ME-702758

Spare parts far PE-Pats

Service Bulletin ME-703161

FEHD-R balance, FEHD-2R balance

Service Bulletin ME-705068FE HD / FE HD-2 balance

02187

03187

06/92

Semite manual ME-705354 06/92

BULLETIN PE16

PE16: Special Fastmode bar code table for faster weighing-in

Fastmode without DeltaDisplay CL-45845Certified Fastmode without DeltaDisplay CL-45846

Background

Our experiences on the market have show that the PE16 precision balance does notalways satisfy customer expectations as far as weighing-in is concerned. We havetherefore developed a new bar code for this balance. With the new parameters thatare read in with this new bar code, weighing-in is even faster than before. At thesame time, Delta Display is switched off, i.e. , the last digit of the display is alwaysvisible.

When should the parameters of the special bar code table be read into the balance

Only if the customer specifically asks for a faster weighing-in balance. This means:Do not try to increase the number of balances having faster weighing-in characteris-tics. Reason: Compared to standard balances, these models are much more sensitiveto vibrations.

Preconditions for entering the new bar code into such a balance

At the present time, only ME-47734 microprocessors are built into these balances.In order to read in the bar code, the original ME-47734 microprocessor must be re-placed with an ME-47455 microprocessor. Starting in October 1984, the new ME-47455microprocessors will also be built into PE16 balances. The bar code can be read intothese balances immediately, without first replacing the microprocessor. Just followthe instructions given in the PEI1 . .PE24 Service Manual.

Registering balances with faster weighing-in characteristics

Service technicians are advised to personally register those balances where theparameters of the special bar code table have been read in

1984 ME-701783 0. 55/8408/38.12

Orders for ME-47455 microprocessors

should be sent to: Mettler I nstrumente AGTechnischer KundendienstService Ausland

CH-8606 Greifensee

SWITZERLAND

Important information: ME-47734 microprocessors should not be returned andwill not be credited.

Filing information

The sheet titled NACHTRAGE / COMPLEMENTS / SUPPLEMENTS El should be ex-changed (at the end of the Service Manual).

Add this Bulletin to:

Service Manual PEII / PE12 / PE16/ PE24 / FE HD.

Enclosures:

New Table of Contents of section ESpecial PE16 bar code table CL-45845 / CL-45846

All parts available for the FE HD are listed on the accompanying FE HD ExplodedView Drawing and Parts List. For all other parts, the Parts List in the PE24Service Manual should be used.All repair and adjustment work should be carried out in the same manner as \viththe PE24. As far as adjustment values, calibration weights and tolerances areconcerned, the values given for the PE24 are applicable.FE HO parts that have no Order Number in the Parts List, but are provided witha Position Number, can be ordered using this Position Number (for the most part,these are the parts made of stainless steel).

Filing instructions

This Service Bulletin should be filed in Section E of the pEII/12/16/z4 ServiceManual

Enclosures

- New Service Manuel title page- New Checklist instructions (to be filed in Section B)- Exploded View Drawing + FE HD Parts List (please file in Section A)

La FE HD est une balance de precision &lectronique munie dun bo;tier en acierinoxydable &tanche aux projections deau et dun affichage numerique et analo -gique. Elle dispose dune plage de pesee de O. ..24000 g et affiche Ies resultatsa 1 g pres. Elle possede un clavier permettant dentrer Ie poids de consigne etla tolerance. Cette balance est basee sur Ie modele PE24.

Pour la maintenance et la reparation , la FE HD est d traiter comme une PE24. Lemanuel de maintenance a utiliser est celui des PEI1 . .PE24. La difference entrela FE HD et la PE24 reside clans Ie bo?tier et clans la carte de la balance. Letube daffichage de la carte de la balance netant pas utiliser il a ete supprime.on a incorpore un connecter suppldmentaire (ST3) pour permettre de brancherIe cable de jonction sur Punite daffichage. La carte de la PE24 ne peut pas &treutilisee sur la FE HD; elle ne peut pas non plus &tre modifiee. La vue &clat&e dela FE HD et la Iiste des pieces de rechange ci-jointes contiennent toutes Ies piecesde rechange disponibles pour la FE HD, Pour ce qui concerne Ies pi~ces derechange restantes, se reporter & la Iiste des pieces de rechange faisant partiedu manuel de maintenance. Toutes Ies operations de reparation et de reglage senti effectuer comme sur la PE24. De m~me, toutes Ies indications donnees pour laPE24 a propos des valeurs de reglage, poids de calibrage et tolerances sap -pliquent telles quelies ~ la FE HD.Les pi&es de rechange de la FE HD qui ne possedent pas de numero de commandesur la Iiste des pieces de rechange (elles sent dot6es dun numero de positionseulement) peuvent ~tre commandeer en precisant tout simplement Ieur numerode position (il sagit surtout des pieces en acier au nickel-chrome).

Classement

Pri&re de ranger Ie present bulletin clans Ie registre E du manuel de maintenancedes PE1l/12/16/24.

Annexes

- Nouvelie premiere page du manuel de maintenance- Nouvelle notice de contrble (> ranger clans Ie registre B)- Vue &clatee + Iiste des pieces de rechange FE HD (> ranger clans Ie registre A)

All parts available for the FE HO are listed on the accompanying FE HD ExplodedView Drawing and Parts List. For all other parts, the Parts List in the PE24Service Manual should be used.All repair and adjustment work should be carried out in the same manner as \viththe PE24. As far as adjustment values, calibration weights and tolerances areconcerned, the values given for the PE24 are applicable.FE HD parts that have no Order Number in the Parts List, but are provided witha Position Number, can be ordered using this Position Number (for the most part,these are the parts made of stainless steel).

Filing instructions

This Service Bulletin should be filed in Section E of the pEI I/12/16/24 SericeManual

Enclosures

- New Service Manuel title page- New Checklist instructions (to be filed in Section B)- Exploded View Drawing + FE HD Parts List (please file in Section A)

La FE HD est une balance de precision &lectronique munie dun bo;tier en acierinoxydable &tanche aux projections deau et dun affichage numerique et analo -gique. Eile dispose dune plage de pesee de O. ..24000 g et affiche Ies resultatsi 1 g pr&s. Elle poss+de un clavier permettant dentrer Ie poids de consigne etla tolerance. Cette balance est basee sur Ie modele PE24.

Pour la maintenance et la reparation, la FE HO est b traiter comme une PE24. Lemanuel de maintenance > utiliser est celui des PE1l PE24. La difference entrela FE HD et la PE24 r&ide clans Ie bo~tier et clans la carte de la balance. Letube daffichage de la carte de la balance netant pas utilise, il a ete supprime.On a incorpore un connecter supplementaire (sT3) pour permettre de brancherIe cable de jonction sur Iunit& daffichage. La carte de la PE24 ne peut pas ~treutilisee sur la FE HO; elle ne peut pas non plus i5tre modifiee. La vue eclatee dela FE HD et la Iiste des pieces de rechange ci-jointes contiennent toutes Ies piecesde rechange disponibles pour la FE HD. Pour ce qui concerne Ies pieces derechange restantes, se reporter > la Iiste des pieces de rechange faisant partiedu manuel de maintenance. Toutes Ies operations de reparation et de reglage senti effectuer comme sur la PE24. De m~me, toutes Ies indications donnees pour laPE24 a propos des valeurs de r6glage, poids de caiibrage et tolerances sap -pliquent telles quelles A la FE HD.Les pieces de rechange de la FE HD qui ne possedent pas de numero de commandesur la Iiste des pieces de rechange (elles sent dotees dun numero de positionseulement) peuvent &tre commandeer en precisant tout simplement Ieur numerode position (il sagit surtout des pieces en acier au nickel-chrome).

Classement

Priere de ranger Ie present bulletin clans Ie registre E du manuel de maintenancedes PE1l/12/16/24.

Annexes

- Nouvelle premiere page du manuel de maintenance- Nouvelie notice de contr61e (5 ranger clans Ie registre B)- Vue eclatee + Iiste des pieces de rechange FE HD (A ranger clans Ie registre A)

BULLETIN PEII, PE12, PE16, PE22, PE24, FE HD, FE HD-2 E

TABLE OF CONTENTS

1.2.3.4.5.6.

;:

New Models: PE22, FE HD-2Replacing the guidesReading in using the bar code readerVoltagesSeals (in the FE HD and FE HD-2)Drainage (in the FE HD and FE HD-2)Lateral guidance of the platform support (in the FE HD and FE HD-2)Corrosion on the P/C board (in the FE HD and FE HD-2)

FILING INSTRUCTIONS

This Bulletin should be inserted into Section E of the PEI1. ..FE HD Service Manual

1. New Models: PE22, FE HD-2

Both models are equipped with Delta Range.

The PE22 has been introduced as a complement to the PE24:Weighing range: 0...24000 g; readability: 1 gDelta Range: 0.. .2OOO g; readability: 0,1 g

The FE HD-2 has been introduced as a complement to the FE HD:Weighing range: 0...24000 g; readability: 1 gDelta Range: 0.. .2 OOOg; readability: 0,1 g

Remarks regarding Service work:

. Specifications and adjustment tolerances are the same as with the PE24 and FE HD.

. A PE22 bar code table for reading in the data is included.

. Delta Display functions only when the scale ist in the Delta Range.

Replace the Test Instructions in Section B of the Service Manual (see enclosures)File the bar code table in Section F (see enclosures).

Recommendation: Write in the designation of both new models on all remaining pagesof the Service Manual.

1984 ME-701836 0.6/8411/38.12

2. Replacing the guides

There is a new description for replacing the guidesprocedure as it is carried out in the field).

Replace Page D5 in Section D of the Service Manual.

3. Reading in using the bar code reader

(5) (16) (adapted to fit the

When reading in using the bar code reader, things are arranged so that after thefirst line has been read in, each time a new line is read in correctly, the displayimmediately changes to the next higher line to be read in.

Then the following should be noted:After the last line has been read in, a pause of approx. 3. ..5 seconds must elapseOnly then does the display go out and change to OFF (this applies particularlyto the FE HD and FE HD-2, because with these scales, the procedure is differentwhen the last line is read in).

Note: If this pause is not maintained and the last line is read in a second time (onthe assumption that the line was not accepted by scale), the entire read-inprocedure must be repeated after the control bar has been pressed (when this isdone, Line 1 appears in the display).

Recommendation: Make a note of this in the chapter entitled, TECHNICAL OVER-VIEW. Point 6.

4. Voltages

The description in which the secondary voltages are to be measured on connectorbar, STI, is not clear (confusing).

Replace Page C51 in Section C of the Service Manual (see enclosures)

5. Seals (in the FE HD and FE HD-2)Both models conform to IP65 Protection specifications, i. e., rustproof{ andprotected against sprayed water (as per IEC Publication 529).

Remarks regarding Service work:

When carrying out works steps on the display housing (4), make sure no sealsare damaged.. Strips (19) lengthwise, front and rear, between the base of the display hou-

sing (7) and the display housing (4).. Seal (19) for the cable opening from the base of the display housing (7) to

the display holder (8).When replacing the tare key (1) and the program keypad (3), always make surethat the contact surface is clean.When replacing the front glass (2), the the edge of the glass must be coatedwith Gurisil all around (i. e., there may not be any gaps so that water can getin).The cable seal (19) on the back wall of the housing base (11) must always beinstalled properly.All screws must be carefully tightened.

Replace the Exploded View Drawing in Section A of the Service Manual (see en-closures).

6. Drainage

To assure that water will drain out of the scale, and to assure that any calciumdeposits etc. will be prevented from forming between the ribs of the cast housingand the steel housing, there is a space of more than 4 mm between the cast hou-sing and the steel housing (housing base (11 )).

Procedure for scales with a clogged-drain:

Drill two holes (max. dia. 8 mm) in the bottom of the steel housing (housing base(11)).

Note: The exact position of the holes to be drilled should be decided on bylooking for the stains left by the standing water. A space of at least 20 mmbetween the holes and the outside edge of the steel housing should be maintainedin every case!

7. Lateral guidance of the platform supp ort (in the FE HD and FE HD-2)Even with a slight lateral hit on the weighing platform (18), the platform support(17) can be knocked out of position.

Procedure:To improve lateral guidance of the pan support inspecial pan support (with longer edge on the fourboth these models.

Note !

The new Order No. for the platform support (17) for45907/V instead of 48905.The Order No. for the platform support (3) for all other models is still 48905.

the FE HD and FE HD-2, afeet) has been designed for

the FE HD and FE HD-2:

Replace the Parts List in Section A of the Service Manual (see enclosures).

8. Corrosion on the P/C board (in the FE HD and FE HD-2)No soldering work should be carried out on the P/C board because colophoniumresidues (especially on the solder side) oxidize and can therefore cause short-circuits. If soldering work is necessary, the solder spots must be carefully cleanedwhen finished.

ENCLOSURES

Title page of the Service Manual (replace).FE HD, FE HD-2 Exploded View Drawing (replace in Section A).FE HD, FE HD-2 Parts List (replace in Section A).Test instructions, Page B1/B2 (replace in Section B).Voltages, Page C51 (replace in Section C).Replacing the guides, Page D5/D6 (replace in Section D).Supplements, Page El (replace in Section E).Bar code table for PE22, FE HD-2 (file in Section F).

BULLETIN

Spare parts for PE-Pats

According to the current spare parts assortment for Pats for PE Balances, there are noindividual components included; in case of defects complete options had to be replaced.

Marketing information feed-back prompted us to review our spare parts policy. ForPE-Pats, spare parts are now in stock according to the parts list below. Please notethat, effective immediately, complete PE-Pats will no Ionaer be Drovided for warrantvreplacement purposes, since individual components are n~w available.

Pac

PrOPac

Lab Pac

GemPac

Multi Pac

StatPac

CountPac

Data Pac

Function Kev

48324/V

48333/V

45797

Overview Spare Parts for PE-Pats

IKeyboardHand Key Encoder

I47920479204792047920 59804/V59804/V59804/VHousinguppersection

59813/V

59823/V

59833/v

Cables

59809/v

59809/v

59809/v

Filing information: Please file Service Bulletin in PE Service ManualME-702149, ME-701354, section E.

outputprint

Option 016

Option 016

Option 016

59811/v

59821 /V

Option 016

1987 ME-702758 0.7/8702/38.12

BULLETIN FE HD-R (FE HD), FE HD-2R (FE HD-2) E

The newly introduced models FEHD-R and FEHD-2R are modified, water resistant versions ofthe existing models FEHD and FEHD-2. They both include an encapsulated, display circuitboard 5.Purpose: It was found that balances of the current versions do not conform to extremeprotection specifications (Protection Code higher than IP65).In case of repairs, please note the special instructions on the following pages!Additional information is available from the Bulletins ME-701 706 and ME-701835 (pt.1 ). Theyare filed in section E of the PEI 1 ... FE HD-2 Service-Manual.The enclosed spare parts/packaging list and the cover leaf contain the updated informationfor both new versions. Please, also update all other leaves of the PE Service Manual for bothnew versions.

Filing directions:This bulletin is to be included in section E of the PE1 1...FE HD-2 (ME-701354) Service Manual.

Enclosures: Cover leaf (exchange)Spare parts/packaging fist (to be exchanged in section A)SUPPLEMENTS El (exchange in section E)

1987 ME-703161 0.5/87 03/38.1 2

Directions for replacing Tare Key 1

All new tare keys are pre-treated at the factory with Gurisil compound. Therefore, wheneverperforming repairs on new versions, use these new tare keys exclusively!- All stainless steel surfaces which are in contact with the applied Gurisil compound, need to

be Dre-treated with mimer.

I L.,

- Cover bottom side of key with Gurisil compound(Order Nr. 73043).

- Press tare key 1 onto upper section of display housing 4, then fasten with both spring washersand nuts. It is desirable that the Gurisil compound escapes between the rubber cap and thestainless steel surface. Remove excessiveGurisi lcompound at exterior.

- Cut off both protruding threads (e.g., with sidecutters).

- Apply heavy coating of Gurisil toincluding both nuts and threads.

- Check proper functioning of tare key by attaching to balance!

Directions for replacing the front glass 2

inside of aperture,

All new front glasses are factoryequipped with 5 (previously 2)sealing ribbons. Therefore, whenrepairing the new versions, use thesenew front glasses exclusively!

Directions for exchanging the keypad with cable 3

All new key pads are pre-treated at the factory with Gurisil compound. Therefore, wheneverperforming repairs on these new versions, use the new keypads exclusively!-All stainless steel surfaces which are incontact with theaPpliedGurisil com~ound, need to

be pre-treated with primer.

kCompletely fill recessionCompletely fill recession with Gurisil compound(order Nr. 73043).CAUTION: Gurisilcompound must not flow into thekey !

i I

I Thread connecting wires, then press keypad 3 onto$onnetilng wires I upper section 40fdisplay housing; faSen with both

*

spring washers and nuts.IMPORTANT: The Gurisil compound must escapebetween the black rubber cap and the stainless steelsurface. Remove excessive Gurisil compound at

:.

!9Two cable clips (trimmed), available from Small Parts00 Set 45762, are used as back-stops.

ca.16mm

Check for proper fitting of the sealing ribbon around the circumference of the front glass 2.

After each reworking operation perform the following final checks:- Switch balance (ON/OFF)- Change target weight ( + / - / Sel )- Tare- Place weight on balance. Check for correct display.- If possible:

Repeat function check after 24 hours.

TECHNICAL DOCUMENTATION

Adress Mettler-Toledo AG, CH-8606Grei fenseerelephone 01-9442211

Telefax 01-9443080Telex 826150 migch

Service bulletin

METTLER FE HD / FE HD-2 Scales

Supplement to service manualElectronic precision scales PE1l / PE12 / PE16 / FE HD /FE HD-R / PE22 DeltaRange / FE HD-2 / FE HD-2R ME-701354

Spare parts marked with are available only to the end of August 1992. They will then bediscontinued.

Please replace or supplement the following documents in your service manual:. Title page service manual: First page in service manual. Section A: Ersatzteile/Spare parts FE HD (after FE HD / FE HD-2 exploded view diagram). Section E: 1. First this ,,Sewice Bulletin page. Section E: 2. ,,1smy service manual really up-to-date?

11111111111111111111111.P705068.

~ Metller. Toledo AG i 992 ME-705068 Printed in Switzerland 9206/38.12

F1 Schematic diagrams f Schemata / Sch6mas F1

P/C boardGedruckte SchaltungCircuit imprime

Overall diagramGesamtschemaSchema global

Balance P/C boardWaagenplatineCircuit imprime de balance

Display P/C boardAnzeigeprintCircuit imprime daffichage

Scanning P/C boardAbtastprintCircuit imprime de captage

Data Output option 016Oatenausgang Option 016Sortie de donnees option 016

Data Output option 017Datenausgang Option 017Sortie de donnees option 017

Socket holderBuchsenhalterCcmnecteurs

Allocation diagramBelegungsplanPlan d,occu pation

ME-48860

ME-48925

ME-48391

ME-48370

ME-47842

ME-59800

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Electric diagramElektroschemaSchema Glectrique

ES-48855

ES-48855

ES-48371

ES-48380

Documents

PE_SM