Continuous Level Transmitter...A33-0200-1 Rev nc (04-2009) DRR0168 3 Continuous Level Transmitter A33 1.1 The K-TEK Model A33 is an inexpensive electronic liquid level measuring system

Continuous Level Transmitter

Installation & Operation Manual

For the latest version of this manual, visit kteksolidslevel.com.

A33

A33-0200-1 Rev nc (04-2009) DRR0168 2

Continuous Level Transmitter A33

TABLE OF CONTENTS

1.0 GENERAL DESCRIPTION 3

2.0 SPECIFICATIONS 4

4.0 INSTALLATION 8

5.0 CALIBRATION 19

3.0 MODEL NUMBER INFORMATION 5

6.0 OPERATION 21

7.0 MAINTENANCE AND PROBLEM SOLVING 22

8.0 WARRANTY INFORMATION 23

A33-0200-1 Rev nc (04-2009) DRR0168 3


1.1 The K-TEK Model A33 is an inexpensive electronic liquid level measuring system. It is used to measure the amount of material in a tank, bin or other container. It can be used with a wide range of liquids.

1.2 The standard version of the Model A33 consists of two units, the SENSOR unit and the CONTROL unit. The

sensor unit includes the sensor module electronics, an enclosure and a measurement probe. The standard probe is a solid 3/8” diameter stainless steel rod inside a Teflon® sheath. The control unit contains power supplies for both the sensor module and the 4-20 milliAmp output loop. Many options are available with the Model A33, including:

• Set point modules (DPDT relay cards) • Display meters (digital or analog) • Solid or flexible probes • Insulated or non-insulated probes • Special high temperature probes • Special enclosures

Applications assistance is available through our distributors and representatives as well as from the factory.

1.3 In most applications, the installation and calibration of the Model A33 are easily accomplished by a competent

electrician. Mounting the sensor unit requires three basic steps. First, provide an opening in the tank or other container. Second, fit this opening with a suitable coupling, and mount the Model A33 securely in the cou-pling. Many different types of enclosures are available through K-TEK as options with the control unit to make it suitable for most individual environments. The only test equipment required to calibrate the unit is an accurate volt or current meter to measure the voltage or current in the loop.

1.4 The rugged construction techniques used in building the probes allow them to withstand the rigors of indus-

trial environments. All of this is accomplished while maintaining the ultimate in simple probes offering the wid-est possible range of applications.

1.0 GENERAL DESCRIPTION

A33-0200-1 Rev nc (04-2009) DRR0168 4


Environmental Housing Type (Sensor) Type “H” - Aluminum Enclosure Explosion-Proof NEMA 4 Type “G” - Aluminum Enclosure NEMA 4

Temperature Electron-ics: -40° to +185°F / -40° to +85°C Functional Ambient

-40° to +168°F / -40° to +70°C Rated Accuracy Electrical Control Unit Input Power 95-130 VAC, 50-60 Hertz, 2 Watts; 190-260 VAC, 50-60 Hertz, 2 Watts Output Signal 4-20 mA into 0-1100 Ohms, Fully Isolated Input Signal Pulse Duration (Optically Isolated from Sensor Unit) Sensor Unit Input Power From Control Unit Output Signal Pulse Duration (to Control Unit) Calibration Range Sensitivity 0-200 to 0-12,600 Picofarads Accuracy ±0.5% of Full Span Mechanical Process Connection 1/2” NPT (Unless Otherwise Stated)

2.0 SPECIFICATIONS

A33-0200-1 Rev nc (04-2009) DRR0168 5


3.0 MODEL NUMBER INFORMATION A33 / a / b / c / d / e : a Operating Voltage /A 120

VAC /B 240 VAC /D 12 or 24 VDC (Specify)

b Probe Type Operating Temp Operating Pressure /1 316SS Probe / 4” *Delrin® Lower bushing / 1/2” NPT A A /2 316SS Probe / 4” *Teflon® Lower Bushing C A /6 PVC Covered Cable / 13” 316SS Weight A D /8 PVC Covered Cable / 13” Nylon Weight A D /N *Teflon® Covered Cable / 13” *Teflon® Weight C D /R *Teflon® Sheathed Probe / 316SS Mounting Nipple C A /S *Teflon® Sheathed Probe / *Teflon® Mounting Nipple A D /V *Teflon® Sheathed Probe / CPVC Mounting Nipple C B /W Concentric Shield / *Teflon® Sheathed Probe C A /X *Teflon® Sheathed Probe / 316ss Inactive Sheath C A c Probe Length Rigid Probe in Inches; Cable Probe in Feet d Options /O No Options /C Epoxy Coated Aluminum Enclosure (NEMA 4X) /F Flanged Connection /G *Teflon® Faced Flange /L Stainless Steel Tags /T *Teflon® Centralizer (for type “W” probe) /Z Any Special Options (Such as Ext. Lower Bushing) Not Included in Above Description /Z A36 Power Supply /Z A37 Set-point Module /Z Belden “8762” Connector Cable /Z A33-M-A-ANA (0-100% Analog Only) /Z A33-M-D-LED (3 1/2 digit display requires A36 power supply) /Z A33-M-D-LCD (3 1/2 digit loop powered display) /Z Remote Mount NEMA 4X Enclosures (Specify size as #1- 8”x6”, #2- 10”x8”, #3- 12”x10”, #4- 12”x14”,

#5- 16”x14” /Z Special - Explain

OPERATING TEMPERATURE CODES A -40°F to +185°F / -40°C to + 85°C A 1500 psi @ 77°F / 103 bar @ 25°C

B -40°F to +320°F / -40°C to + 160°C B Static Head Only (Consult Factory)

C -40°F to +450°F / -40°C to + 230°C C 150 psi / 10.3 bar

OPERATING PRESSURE CODES

D +200°F to +1400°F / +95°C to + 760°C D 100 psi / 7 bar

A33-0200-1 Rev nc (04-2009) DRR0168 6


Figure 3.1: Explosion-proof Sensing Unit Dimensions

REMOTE-MOUNT SENSOR ENCLOSURES

Figure 3.2: NEMA 4 Sensing Unit Dimensions

A33-0200-1 Rev nc (04-2009) DRR0168 7


Figure 3.3: Overall dimensions-Control Unit

A33-0200-1 Rev nc (04-2009) DRR0168 8


4.0 INSTALLATION 4.1 After unpacking the unit, inspect it for any evidence of shipping damage. Any claims for damage due to ship-

ping must be filed with the carrier who handled the package(s). 4.2 Select a mounting location for the Model A33 sensor unit and its attached sensor probe. See figure 4.1 and

Figure 4.2 for some recommended mounting practices. Be sure that there is sufficient clearance around the mounting position to allow for the turning radius of the sensor enclosure as the unit is screwed into place. Also, in the case of rigid probes, allow sufficient room to be able to insert the probe into the opening of the vessel. Be careful not to damage any coating that may be on the probe. The thread size of the coupling should be ¾” NPT for most probes. Certain special applications may utilize couplings of different sizes. CAUTION: When making the opening in the vessel, observe all safety requirements of the area in which the work is being done. Be especially careful of pressure vessels.

4.3 The Model A33 unit may not work properly if: • The material dielectric constant is less that 1.8. • If a conductive bridge occurs between probe and vessel wall. • If the unit has inadequate grounding. • Probe insulation is damaged. • Probe is located near a material fill line. • Probe is mounted improperly. See figures 4.1 and 4.2.

4.4 The Model A33 unit may be damaged if:

• Temperature in the Model A33 housing in which the sensor module is located exceeds 185°F upper lim-its or –40°F lower limits.

• If the probe temperature exceeds appropriate limits. See probe types on page 5. • The electronics unit is subjected to excessive vibration or shock. • Vessel pressure exceeds pressure rating of probe. • Probe is mounted in direct flow of material.

If any of the above statements apply to your application, do not install Model A33 until contacting your local distributor, representative or the K-TEK factory for instructions. 4.5 Install the Model A33 unit into the coupling and connect conduit between the sensor unit and the control unit

as required. Be sure the conduit is suitable for the environment in which the units are to be used. See sec-tion 4.9 for a discussion of intrinsic safety barriers.

4.6 Select a mounting location for the Model A33 control unit. Because many facilities have existing control pan-

els, the control unit may be supplied with a length of snap track mounting strip and no enclosure. This offers maximum economy of installation. Remove the control unit from the mounting strip and mount the strip in a convenient location inside the selected enclosure using two screws. Snap the control unit back into the snap track strip and proceed to section 4.8.

4.7 If an optional housing has been provided with the control unit, the mounting within the enclosure has already

been done at the factory. Considerations should be given to several factors when selecting the mounting lo-cation.

• The temperature range at the mounting location should not exceed that shown in the specifications. • The environmental conditions at the mounting location must be consistent with the enclosure ratings

(hazardous, washdown, etc.). • If the unit contains a display, the mounting location should allow for convenient viewing by operating per-

sonnel. • The mounting location should provide for ready access for calibration and service.

A33-0200-1 Rev nc (04-2009) DRR0168 9


4.8 Wire the Model A33 unit in accordance with the National Electric Code and any pertinent local codes. See Figure 4.8 for a general schematic layout of a typical loop wiring arrangement. Because of the extremely wide range of control and/or alarm applications in which the unit may be used, it is not possible to show all conceivable wiring diagrams. Consult your distributor, representative or K-TEK if assistance is desired. Fig-ure 4.5 through 4.8B are included in this manual for convenience. These figures give general wiring informa-tion about some of the optional units available for use with Model A33. Individual manuals for each of these optional units should also be consulted for further details.

METALLIC VESSELNote that the probe is positionedparallel to the vessel wall and wellaway from the direct flow of liquid.

SUGGESTED MOUNTING ARRANGEMENTS

vessel with an agitator. Be sure that stabilizing to an average level in a

The stilling well provides a means of

VESSEL with AGITATORand STILLING WELL

the probe and well are clear of the agitator.

the probe to measure against.

NON-METALIC VESSELin a non-metalic vessel a

"GROUND" rod must be intro-duced to provide a reference for

This rod must be connected tothe probe housing.

METALLIC VESSEL

the measurement.appreciable effect on

sides and ends of the tankliquids the curvature of the

When measuring conductive

do not have any

when working with non-conductive liquids.associated with the curvature of the tank,

a reference for the probe to measureshield must be introduced to provideIn a non-metallic vessel a concentric

NON-METALIC VESSEL

against. This eliminates the non-linearity

Figure 4.1

A33-0200-1 Rev nc (04-2009) DRR0168 10


This mounting location is notrecommended. Consult factory

for additional information

SUGGESTED MOUNTING ARRANGEMENTS

24 Feet

Union Fitting Conduit

Not

Maximum Lengthon Solid Rods

Longer LengthsAvailable forCable Probes

Recommended

FittingSeal & Drain

this arrangements.if it is necessary to use

Figure 4.2

A33-0200-1 Rev nc (04-2009) DRR0168 11


TP11

TP7

TP9

TP2

TP4

L1L2

(N)

TP1

TP8

TP3

- LO

OP

+

- S

EN

SO

R +

One

jum

per r

ange

mus

t be

sele

cted

to p

rodu

ce o

utpu

tfro

m th

e se

nsor

mod

ule.

SE

NS

OR

LIM

IT(N

EM

A 4

EN

CLO

SUR

E)

SE

NSO

RTE

RM

INAL

TP5

TP6

(EX

PLO

SIO

N P

RO

OF

ENC

LOS

UR

E)S

EN

SO

R U

NIT

SE

NS

OR

MO

DU

LETE

RM

INAL

CO

NTR

OL

UN

IT

TER

MIN

ALLO

OP

120

VAC

PO

WER

TER

MIN

AL

SEN

SO

R M

OD

ULE

RA

NG

E J

UM

PER

J1J2

J3J4

J1 =

0 -

200p

FJ2

= 0

- 1,

400p

FJ3

= 0

- 6,

200p

FJ4

= 0

- 12

,600

pF

NO

TE:

Figu

re 4

.3:

Sens

or W

iring

Inst

ruct

ions

A33-0200-1 Rev nc (04-2009) DRR0168 12


TP7

TP9

TP2

TP4

L1L2

(N)

TP1

TP8

TP3

- LO

OP

+

- S

ENSO

R +

ZER

O A

DJU

STM

EN

TC

OA

RS

E S

PAN

AD

JUS

TME

NT

FIN

E S

PAN

AD

JUST

MEN

T

OFF

SET

AD

JUS

TME

NT

SET

& S

EA

LED

AT

FAC

TOR

Y

TO T

HE

HO

T S

IDE

OF

CO

NN

EC

T TH

IS T

ER

MIN

AL

A 1

20 V

AC P

OW

ER

SO

UR

CE

A 1

20 V

AC P

OW

ER

SO

UR

CE

CO

NN

EC

T TH

IS T

ER

MIN

ALTO

TH

E N

EU

TRA

L S

IDE

OF

OF

A 4

-20m

A L

OO

P

CO

NN

EC

T TH

IS T

ER

MIN

ALTO

TH

E N

EG

ATI

VE S

IDE

ON

TH

E S

EN

SO

R M

OD

ULE

CO

NN

EC

T TH

IS T

ER

MIN

ALTO

TH

E N

EG

ATI

VE

TE

RM

INA

LTO

TH

E P

OS

ITIV

E T

ER

MIN

AL

CO

NN

EC

T TH

IS T

ER

MIN

AL

ON

TH

E S

EN

SO

R M

OD

ULE

TO T

HE

NE

GA

TIV

E S

IDE

CO

NN

EC

T TH

IS T

ER

MIN

AL

OF

A 4

-20m

A L

OO

P

TP5

TP6

A33

CO

NTR

OL

UN

IT

TP11

Figu

re 4

.4:

Con

trol

Uni

t Wiri

ng In

stru

ctio

ns

A33-0200-1 Rev nc (04-2009) DRR0168 13


Figu

re 4

.5a:

Mod

el A

35 S

etpo

int U

nit W

iring

Inst

ruct

ions

and

Det

ails

A33-0200-1 Rev nc (04-2009) DRR0168 14


L1

TRA

NS

FOR

MER

L2

NO2

C2

NC2

NO1

C1

NC1

+

-

MA

DE

HI

LO

T/D

S/P

DIF

F

MO

DE

L

A37

S

ET-P

OIN

T U

NIT

ASI

IN

STR

UM

EN

TS I

NC

.

TP4

TP2

TP3

TP6

TP1

TP5

F/S

Adjustable Differential SwitchingSpan Potentiometer

Set-Point Potentiometer

Span potentiometerTime Delay Potentiometer

"Fail-Safe" Selector

Connect to the negative*side of the current loop.

side of the current loop.Connect to the positive*

NOTE**If more than one loop device is connected wire the A37 in accordancewith concentional series loop wiring.

120/240 VAC 50/60 HzInput Power. (L2 = Neutral)

ON = Relay energizedstatus of the relay.The Green LED indicates the

OFF = Relay de-energized

MountingHoles

DIRECT ACTION (*FAIL-SAFE* LOW)

THE CALIBRATED A37 VALUE

THE HOOH-UP CAUSES THE LAMP TO LIGHT AND THE HORN TO SOUND WHEN THE MATERIAL LEVEL PRODUCES A

CURRENT LOOP SIGNAL EQUAL TO OR GREATER THAN

2 Form C Dry ContactsConsult Specifications for Rating

C2 NO3

NC1

NC1

NO3C2

120/240 VAC50/60 Hz

HORN

LAMP

FIELDSUPPLIEDDEVICES

DEVICESSUPPLIED

FIELD

LAMP

HORN

50/60 Hz120/240 VAC

C2 NO3

NC1

NC1

NO3C2

Consult Specifications for Rating2 Form C Dry Contacts

CURRENT LOOP SIGNAL EQUAL TO OR LESS THAN HORN TO SOUND WHEN THE MATERIAL LEVEL PRODUCES A

THE HOOH-UP CAUSES THE LAMP TO LIGHT AND THE



THE HOOH-UP CAUSES THE LAMP TO LIGHT AND THE HORN TO SOUND WHEN THE MATERIAL LEVEL PRODUCES A

CURRENT LOOP SIGNAL EQUAL TO OR LESS THAN

2 Form C Dry ContactsConsult Specifications for Rating

C2 NO3

NC1

NC1

NO3C2

120/240 VAC50/60 Hz

HORN

LAMP

FIELDSUPPLIEDDEVICES

DEVICESSUPPLIED

FIELD

LAMP

HORN

50/60 Hz120/240 VAC

C2 NO3

NC1

NC1

NO3C2

Consult Specifications for Rating2 Form C Dry Contacts

CURRENT LOOP SIGNAL EQUAL TO OR GREATER THAN HORN TO SOUND WHEN THE MATERIAL LEVEL PRODUCES A

THE HOOH-UP CAUSES THE LAMP TO LIGHT AND THE


REVERSE ACTION (*FAIL-SAFE* HIGH)

C2NORMALLY CLOSED

RELAY CONTACTRELAY CONTACT

NORMALLY OPENSCREW

TERMINALWIRING

FIELD

Figure 4.5B: Model A37 Setpoint Module Wiring Instructions Details

A33-0200-1 Rev nc (04-2009) DRR0168 15


-OR

-

-+

THIS

TE

RM

INA

L P

RO

VID

ES

A R

EGU

LATE

D+5

VO

LTS

SO

UR

CE

AT

UP

TO

200

MIL

LIA

MP

S.

ITS

PR

IMA

RY

USE

IS F

OR

DIG

ITA

L D

ISP

LAY

CO

M+5

V+1

2V

NU

ETL1

(L2)

ITS

PR

IMA

RY

US

E IS

FO

R S

ET

POIN

TS+1

2 V

OLT

S S

OU

RC

E A

T U

P T

O 8

00 M

ILLI

AMP

S.TH

IS T

ER

MIN

AL

PR

OV

IDE

S A

NO

N-R

EG

ULA

TED

THE

+12

VO

LT S

OU

RC

ETO

BO

TH T

HE

+5

VOLT

AN

DTH

IS T

ER

MIN

AL

IS C

OM

MO

N

THIS

PO

WE

R S

UPP

LY M

AY B

E U

SED

TO

PO

WER

UP

TO

SIX

(6) S

ET P

OIN

T U

NIT

SA

ND

ON

E (1

) DIG

ITA

L D

ISP

LAY

WH

EN

TH

ER

E IS

NO

DIG

ITA

L D

ISP

LAY

UP

TO

EIG

HT

(8) S

ET

PO

INT

UN

ITS

THE

TO

TAL

CO

MB

INE

DC

UR

RE

NT

FRO

M T

HE

+5

AN

D +

12 V

OLT

SO

UR

CE

SM

US

T N

OT

EXC

EED

800

MIL

LIA

MP

S.

FOR

DE

TAIL

S.

CO

NS

ULT

FA

CTO

RY

240

VO

LT A

C.

PO

WE

RE

D F

RO

MTH

IS U

NIT

MA

Y B

E

CO

NN

EC

T TH

IS T

ER

MIN

AL

TO T

HE

NE

UTR

AL

SID

E O

FA

120

VAC

PO

WE

R S

OU

RC

E12

0 V

AC P

OW

ER

SO

UR

CE

TO T

HE

HO

T S

IDE

OF

AC

ON

NE

CT

THIS

TE

RM

INA

L

Figu

re 4

.6:

Mod

el A

36 P

ower

Sup

ply

Uni

t Wiri

ng In

stru

ctio

ns

A33-0200-1 Rev nc (04-2009) DRR0168 16


Figure 4.7A: A33-M-D-LCD

1.XXX

CO

M

1X.XX

TEST LOWHIHOLD

Loop Powered 3 1/2 Digit DisplayZERO Adjustment

SPAN Adjustment

BackView

ViewTop

loop terminal(+) Current (-) Current

loop terminal

5VDC Powered 3 1/2 Digit DisplayFigure 4.7B: A33-M-D-LED

FINE SPAN AdjustmentOFFSET Adjustment

COARSE SPAN Adjustment

Connect a wire from thisterminal directly to "LOOP-"on the A33 control unit and,

USING A SEPERATE WIRE,connect this terminal directly to

"COM" on the A36 power supply.of an external loop.to the negative side

--OR--A33 control unit

to "LOOP+" on theConnect this terminal

on the model A36 power supply.Connect this terminal to "+5V"

A33-0200-1 Rev nc (04-2009) DRR0168 17


THIS

RE

SIS

TOR

MU

ST

BE

INS

TALL

EDIN

ON

E A

ND

ON

LY O

NE

OF

THE

SET

PO

INT

UN

ITS

SU

PP

LIE

D F

RO

M A

MO

DE

L A

33

SEN

SO

R

CO

NTR

OL

UN

IT

DIG

ITA

L D

ISP

LAY

IT M

US

T B

E O

MIT

TED

IF A

MO

DE

LS

ING

LE M

OD

EL

A36

PO

WE

R S

UPP

LY.

L O O P

+ -

-+

POOL

SU

PP

LYP

OW

ERM

OD

EL A

36

A33

-M-D

DIG

ITAL

DIS

PLAY

ISIN

STA

LLE

D.

MO

DE

L A3

5S

ET

PO

INT

LOO

P+

- -+

PO

WER

PO

WER

+-S

ET

PO

INT

MO

DE

L A

35-

+LO

OP

SET

PO

INT

UN

ITS

AND

ON

E D

IGIT

AL

DIS

PLAY

SU

PP

LY U

P T

O S

IX (6

)P

OW

ER

SU

PPLY

MA

YO

NE

MO

DEL

A36

-OR

-U

P T

O E

IGH

T (8

) SE

TP

OIN

T U

NIT

S W

HE

N

DIG

ITA

L D

ISP

LAY

THE

RE

IS N

O

LOO

PM

OD

EL

PM

-35A

DIG

ITA

L D

ISPL

AYP

OW

ER

-+

-+

-+

-+

-+

+-

THES

E D

EVIC

ES A

RE

SU

PP

LIED

BY

TH

E U

SE

R O

F TH

E A

33LE

VE

L M

EAS

UR

EM

ENT

SYS

TEM

AN

Y O

R A

LL O

F TH

ESE

DEV

ICES

AN

D N

OT

BY

AS

I IN

STR

UM

EN

TS.

MA

XIM

UM

LO

OP

RE

SIS

TAN

CE

IS N

OT

EX

CE

EDED

.

REQ

UIR

ED

AS

LO

NG

AS

THE

MA

Y B

E U

SE

D O

R O

MIT

TED

AS

CH

AR

TR

EC

OR

DE

R

ME

TER

AN

ALO

G D

ISP

LAY

CO

MP

UTE

R O

RP

RO

GR

AMM

ABL

EC

ON

TRO

LLE

R IN

PU

T

Figu

re 4

.8A

:S

chem

atic

dia

gram

of t

ypic

al lo

op w

iring

det

ails

. In

orde

r to

avoi

d ac

cum

ulat

ing

larg

e lo

opre

sist

ance

's, d

evic

es s

uppl

ied

by A

SI I

nstru

men

ts a

re o

pera

ted

in p

aral

lel w

ith e

ach

othe

r acr

oss

a si

ngle

loop

resi

stor

as

show

n. O

ther

loop

ele

men

ts m

ust b

e co

nnec

ted

in th

e co

nven

tiona

l ser

ies

arra

ngem

ents

.

120

VA

C

A33-0200-1 Rev nc (04-2009) DRR0168 18


A33

CO

NTR

OL

UN

IT

Dig

ital D

ispl

ay

L O O P

+ -

Cha

rtR

ecor

der

Ana

log

Met

er

Pro

gram

able

120

VAC

erruC n tL1

L2

Hot

Neu

tral

L2L1

Mod

ule

Set

-Poi

ntA

37A

37S

et-P

oint

Mod

ule L1

L2

++

++

+

-

-

--

-

+

Con

trolle

r-

100.

0

Figu

re 4

.8B

: Sc

hem

atic

Dia

gram

of T

ypic

al L

oop

Wiri

ng D

etai

ls U

sing

A37

Set

poin

t Mod

ules

A33-0200-1 Rev nc (04-2009) DRR0168 19


4.9 Intrinsic Safe Barriers may provide both an economical and an effective means of insuring safety for hazard-ous areas. Properly applied, intrinsic safety barriers limit the available energy on certain types of electrical circuits to such low levels that an explosion cannot be produced by arcing of the protected wiring. There are a number of manufacturers who offer barriers that are suitable for use in the wiring between the control unit and sensor unit. However, proper use and installation of these barriers requires specialized knowledge. Consult your distributor, representative or K-TEK if you desire further information about barriers. CAUTION: Be sure that all wiring and conduit conforms to the requirements of the national electrical code and any enforcing or agencies having jurisdiction over the installation. Be sure that any special conditions, such as having explosion hazards, are given full consideration.

4.10 After installing and wiring the unit, it is necessary to calibrate the unit to the particular vessel and material that will be measured. This is accomplished by first lowering the product level in the vessel to the minimum span point and setting “ZERO.” Then, raise the product level to the maximum span point to set “SPAN.” It is possi-ble to perform a useable on a vessel that is partially filled at the time of installation. See section 4.11 for de-tails of this procedure. When using this alternate calibration, it is recommended that “ZERO” and “SPAN” be verified when the actual product level reaches the minimum and maximum points on the probe. Read all of the following step-by-step instructions before beginning. Refer to Figure 4.4 for the locations of adjustments and controls. These instructions describe the calibration procedure for the Model A33 Sensor and Control Units. For calibration of optional accessory equipment, consult the appropriate manual.

4.11 In actuality, all level control applications are interface measurements. In most cases, the measurement is

made at the interface of air and product. It is possible for the interface of two products if there is a very sig-nificant difference between the dieclectric constants. The two products must not mix, thus producing a dis-tinct interface.

A33-0200-1 Rev nc (04-2009) DRR0168 20


5.0 CALIBRATION 5.1 Standard Calibration Step 1 Using the Range Jumper on the sensor module, select the proper range for the application in which the

Model A33 unit is to be used. See Table 5.1 (below) to determine the setting for conductive liquids. In order to use Table 5.1, it is necessary to know the type of probe as well as the measurement length. Find the appropriate setting based on your particular combination.

Step 2 Connect a voltmeter that is capable of accurately measuring 0.40 to 2.00 volts DC between TP8 (+) and

TP9 (-) on the CONTROL UNIT. Alternately, an accurate current meter may be placed in series with the 4-20mA DC current loop.

Step 3 With the material in the vessel at the minimum level, adjust the ZERO potentiometer on the CONTROL

UNIT until the voltmeter reads 0.40 volts. (This setting produces 4mA in the loop.) Step 4 With the material in the vessel at the maximum level, adjust the COARSE & FINE SPAN potentiometers

on the CONTROL UNIT until the voltmeter reads 2.00 volts. (This setting produces 20mA in the loop.) Disconnect the voltmeter from the CONTROL UNIT or remove the current meter from the loop. This completes the calibration procedure and the unit is now ready for operation.

TABLE 5.1 CONDUCTIVE PRODUCTS

Probe Type Range 1 0-200pF

Range 2 0-1400pF

Range 3 0-6200pF

Range 4 0-12,600pF

“R” Teflon® Sheathed <1.5 ft. span 1.5-11 ft. span 11-24 ft. span n/a

“N” Teflon® Cable <1.5 ft. span 1.5-11.5 ft. span 11.5-52 ft. span >52 ft. span

NONCONDUCTIVE PRODUCTS

Type “W” Concentric Shield Probe

*K = 2 <7.5 ft. span 7.5-24 ft. span n/a n/a

*K = 4 <3.5 ft. span 3.5-24 ft. span n/a n/a

*K = 6 <2.5 ft. span 2.5-17.5 ft. span 17.5-24 ft. span n/a

*K = 8 <1.5 ft. span 1.5-13 ft. span 13-24 ft. span n/a

A33-0200-1 Rev nc (04-2009) DRR0168 21


5.2 Interface Calibration Step 1 Using Table 5.1, set the Range Jumper according to conductive materials and your probe type. Step 2 Connect a voltmeter that is capable of accurately measuring 0.40 to 2.00 volts CD between TP8 (+) and TP9

(-) on the CONTROL UNIT. Step 3 Adjust the level in the vessel until the probe is covered with only the upper (non-conductive) material. Adjust

the ZERO potentiometer on the CONTROL UNIT until the voltmeter reads 0.40 volts. (This setting produces 4mA in the loop.)

Step 4 Raise the interface in the vessel to the desired level. Adjust the COARSE & FINE SPAN potentiometers on

the CONTROL UNIT until the output is equal to the actual percentage of interface level on the probe. For example, if the level is at 45% of probe span, the span potentiometers should be adjusted until the voltmeter reads 1.2 volts. (This setting produces 11.2 mA in the loop.) Disconnect the voltmeter from the CONTROL UNIT. This completes the calibration procedure and the unit is now ready for operation.

2.00 VDC - 0.40 VDC = 1.6 VDC X .45 = 0.72 VDC + .40 VDC = 1.120 VDC 20mA - 4mA = 16mA X .45 = 7.2mA + 4mA = 11.20mA 6.0 OPERATION There are no operating controls associated with the Model A33 unit and no specific operator actions are re-

quired in connection with the use of this device. However, the unit provides information to the operator, which should be very helpful in making other operating decisions. In most cases a visual display will keep the op-erator informed of how much material is in the measured vessel. Optional setpoint modules may be used to sound audible or visible alarms or to control various types of machinery associated with the measured vessel. The Model A33 may also provide information to a computer or programmable controller. The operator should be fully aware of how the Model A33 fits into the whole system and be prepared to take whatever action is necessary as system conditions change.

7.0 MAINTENACE AND PROBLEM SOLVING No periodic maintenance is required with the A33 LEV-L-LINE continuous level transmitter. In the event of a failure: Make sure that changing or altering the controls of this unit cannot upset the process it is controlling. Troubleshooting:

1. Perform a visual inspection of the unit for apparent problems such as broken or disconnected wires. 2. Check the line voltage of the unit. 3. Check the polarity of the wiring between the control card and the remote-mounted sensor module. 4. Check the continuity between the sensor ground and the Bessel ground. This should effectively be a

short-circuit. 5. Use the troubleshooting drawing on the following page to check and record the values identified.

Probe Section: With no product touching the probe and the probe wire disconnected, check for continuity between the Center probe rod and the vessel ground. The measurement should be effectively open-circuit.

If the above steps reveal a problem with the unit(s) please contact the factory or the authorized K-TEK dis-tributor or representative responsible for the sale.

A33-0200-1 Rev nc (04-2009) DRR0168 22


A33

TR

OU

BLE

SH

OO

TIN

G T

ES

T P

OIN

TS

TP11

TP7

TP9

TP2

TP4

L1L2

(N)

TP1

TP8

TP3

- L

OO

P

+

- S

EN

SO

R +

If re

adin

g n

ot w

ithin

spe

c

TP11

(+) &

TP

9(-)

= -6

.5V

DC

Pow

er s

uppl

y ±

0.5V

DC

TP5

TP6

retu

rn fo

r rep

lace

men

t

you

set "

ZER

O"

VD

C fo

r bot

h sh

ould

be

= w

hen

TP6(

+) &

TP

9(-)

= V

DC

@ T

P5

& T

P9

tank

leve

l is

at th

e po

int w

here

0.0V

DC

= B

ad s

enso

r mod

ule

TP5(

+) &

TP

9(-)

= S

ome

DC

vol

tage

this

vol

tage

> w

ith c

apac

itanc

e >

, max

VD

C =

3.2

5

A n

egat

ive

VD

C re

adin

g in

dica

tes

that

the

sens

oris

not

con

nect

ed o

r is

impr

oper

ly c

onne

cted

.lo

op s

horti

ng ju

mpe

r as

show

n.ch

ange

the

outp

ut in

stal

l the

cur

rent

Cor

resp

onds

to 4

-20m

A c

urre

nt lo

op.

TP8(

+) &

TP

9(-)

= 0

.4V

DC

to 2

.0V

DC

If th

e "Z

ER

O" &

"SP

AN

" pot

s do

not

no

spl

ices

, clip

s, o

r lug

s)

Cur

rent

loop

sho

rting

jum

per

(sin

gle

piec

e of

wire

,

retu

rn fo

r rep

lace

men

t

Pow

er s

uppl

y ±

0.5V

DC

TP10

(+) &

TP

9(-)

= -6

.5V

DC

If re

adin

g n

ot w

ithin

spe

c

to s

enso

r are

sho

rted

resi

stor

s

TP3(

+) &

TP

2(-)

= 1

2.5V

DC

R1

& R

2 ac

t as

fuse

s. if

wire

s

Will

bur

n op

en. I

f 0.0

VD

C is

read

th

en re

sist

or is

bad

.

prov

ides

pow

er to

sen

sor m

odul

e

TP1(

+) &

TP

2(-)

= 15

VD

C (±

0.5V

DC

)C

heck

s po

wer

on

the

cont

rol c

ard

that

OFF

SE

TZE

RO

C-S

PA

N-F

A33-0200-1 Rev nc (04-2009) DRR0168 23


8.0 WARRANTY INFORMATION 3 YEAR WARRANTY FOR: ShieldPoint™300 & ShieldPoint™400 capacitance switches. 2 YEAR WARRANTY FOR: WT2000 radar level transmitters; RP paddle switches; A02, A75, & A77 RF capacitance level switches and A33 & A38 RF capacitance level transmitters; A22 Speed Switch; CP2 Conductance Switch. 1 YEAR WARRANTY FOR: LaserTrak™ and EasyTrak™ series laser transmitters; DPM100 digital indicators; KVIEW series digital indicators and con-trollers; GranuPoint™ and SlurryPoint™ vibrating fork switches, SoliTrak™ Electro-Mechanical Continuous Measuring De-vices, SonikTrak™ultrasonic level transmitters & transducers. SPECIAL WARRANTY CONSIDERATIONS: K-TEK will honor OEM warranties for items not manufactured by K-TEK (i.e. Palm Pilots). K-TEK will repair or replace, at K-TEK’s election, defective items which are returned to K-TEK by the original purchaser within the period specified above from the shipment date of the item and which is found, upon examination by K-TEK, to its satisfaction, to contain defects in materials or workmanship which arose only under normal use and service and which were not the result of either alterations, misuse, abuse, improper or inadequate adjustments, applications or servicing of the product. K-TEK’s warranty does not include onsite repair or services. Field service rates can be supplied on re-quest. If a product is believed to be defective, the original purchaser shall notify K-TEK and request a Returned Material Authori-zation before returning the material to K-TEK, with transportation prepaid by the purchaser. (Request door to door deliv-ery via Houston International Airport located in Houston, TX, USA.) The product, with repaired or replaced parts, shall be returned to the purchaser at any point in the world with transportation prepaid by K-TEK for best-way transportation only. K-TEK is not responsible for expedited shipping charges. If the product is shipped to K-TEK freight collect, then it will be returned to the customer freight collect. If inspection by K-TEK does not disclose any defects in material or workmanship, K-TEK’s normal charges for repair and shipment shall apply (minimum 100.00 USD). The materials of construction for all K-TEK products are clearly specified and it is the responsibility of the purchaser to de-termine the compatibility of the materials for the application. THE FOREGOING WARRANTY IS K-TEK'S SOLE WARRANTY AND ALL OTHER WARRANTIES EXPRESSED, IM-PLIED, OR STATUTORY, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OF FITNESS FOR A PAR-TICULAR PURPOSE, ARE EXCLUDED AND NEGATED TO THE MAXIMUM EXTENT PERMITTED BY LAW. NO PER-SON OR REPRESENTATIVE IS AUTHORIZED TO EXTEND ANY OTHER WARRANTY OR CREATE FOR K-TEK ANY OTHER LIABILITY IN CONNECTION WITH THE SALE OF K-TEK’S PRODUCTS. THE REMEDIES SET FORTH IN THIS WARRANTY ARE EXCLUSIVE OF ALL OTHER REMEDIES AGAINST K-TEK. K-TEK SHALL NOT BE LIABLE FOR ANY CONSEQUENTIAL, INCIDENTAL, OR SPECIAL DAMAGES OF ANY KIND. K-TEK’S SOLE OBLIGATION SHALL BE TO REPAIR OR REPLACE PARTS (FOUND TO BE DEFECTIVE IN MATERIALS OR WORKMANSHIP) WHICH ARE RETURNED BY THE PURCHASER TO K-TEK.

A33-0200-1 Rev nc (04-2009) DRR0168 24


For the latest version of this manual, visit kteksolidslevel.com.

K-TEK Solids Level 6100 West by Northwest #140

Houston, TX 77040 USA Tel: (1) 713.462.7665

Fax: (1) 713.462.7684 Email: [email protected]

Website: kteksolidslevel.com

Documents

Continuous Level Transmitter...A33-0200-1 Rev nc (04-2009) DRR0168 3 Continuous Level Transmitter A33 1.1 The K-TEK Model A33 is an inexpensive electronic liquid level measuring system