NSTRUMENTS ATALOG IC-3 3000 I ERIES I - Daytronic3K-2 I NTRODUCTION 2000 S ERIES 3000 S ERIES 3500 S ERIES 4000 S ERIES INSTRUMENTS CATALOG IC-3 Daytronic Corporation 2211 Arbor Blvd

Each 3000 Series instrument comes inthree basic forms. The "form" of aparticular instrument is indicated by thesecond digit of its model number (seeTable 3.1).

•FORM 1: Signal Conditioner

•FORM 2: Signal Conditioner with Digital Indicator

•FORM 3: Signal Conditioner with Digital Indicator and HI-LO Limits

See General Specifications.

3000 Series OPTIONS include

•Analog Peak Capture

•4-20 mA Current Output

•0-10 V-DC Dual Galvanic Isolated Outputs

•Internal Electromechanical Relays

•Internal Solid-State Relays

•12 V-DC Battery-Powered Operation or Nominal 230 V-AC Operation

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INSTRUMENTS CATALOG IC-3

Daytronic Corporation2211 Arbor Blvd. Dayton, OH 45439 • (800) 668-4745Tel: (937) 293-2566 • Fax: (937) 293-2586 • www.daytronic.com

3000INSTRUMENTSERIES

ANALOG SIGNAL CONDITION-ING WITH MULTIPOLE LOW-PASS ACTIVE FILTERING ANDREGULATED, REMOTELYSENSED EXCITATION

6-DIGIT LED DIGITAL INDICATION

SELECTABLE ANALOG FILTERING

DUAL LIMIT MONITORING WITH FRONT-PANEL ANNUNCIA-TION AND ISOLATED LOGICCONTROL OUTPUTS

"LIVE" VOLTAGE OUTPUTS

"LIVE" CURRENT OUTPUTS

GALVANIC ISOLATED OUTPUTS

REAL-TIME ANALOG PEAK CAPTURE

INTERNAL CONTROL RELAYS

FRONT-PANEL SETUP

DC-POWERED OPERATION

Designed for the toughest real-world requirements, these transducer instrumentsprovide stable, high-level, linear analog out-put signals for use in servo control, remoterecording, or centralized data acquisition.

Table 3.1Model-Numbering System for the 3000 Series

Model 3 X X X (X)"3" is the series identifier, used with all units

Second digit identifies "form" (1, 2, or 3):

Third and Fourth digits identify "type" of signal source:30 = LVDT40 = Frequency Source63 = Analog Voltage Source70 = Strain Gage Transducer (DC-excited)78 = Strain Gage Transducer (AC-excited)

Suffix denotes optional feature(s):P = Analog Peak Capture (Forms 2 and 3 only)C = 4-20 mA Current Output (Forms 1 and 2 of all

instruments, plus Models 3363 and 3370, only)G = Galvanic Isolated Outputs (Forms 1 and 2 only)R = Internal Electromechanical Relays (Form 3 only)S = Internal Solid-State Relays (Form 3 only)B = 12 V-DC Battery-Powered Operation (all Forms)F = Nominal 230 V-AC Operation (all Forms)

NOTE: THE ONLYALLOWABLE OPTIONCOMBINATIONS ARE

P and F P and BC and F C and BG and F G and BR and F R and BS and F = Standard feature for ALL models

= Optional feature for ALL models = Standard feature for SOME models = Optional feature for SOME models

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3000 SERIES GENERAL SPECIFICATIONS

Display (Form 2 and Form 3 instruments only)

Display: Orange LED's, six digits with polarity sign, 0.4"(1.0 cm) height; Most Significant Digit of display iseither unlit or reads "1," and in either case containspolarity sign; Least Significant Digit is a dummy zerowhich may be lit or unlit, as desired (see Fig. 3.8)

Scaling: Selectable at rear panel; full-scale values of±5000 counted by "1's," ±10000 counted by "2's," or±20000 counted by "5's," with selectable decimal-point locations (along with dummy zero) to givedecade multiplier factors of 10, 1.0, 0.1, 0.01, 0.001, or 0.0001 (see Fig. 3.8)

Sampling Rate: 3 samples per second

Limit Logic Outputs (Form 3 instruments only)

Both true and complement available for each limitcondition (LOW, OK, HIGH); TTL-compatible, wire-ORable; 10-mA sink, 0.5-mA source (max.); normallynonlatching, but latching outputs are also available

(cont'd)

Fig. 3.13000 Series Bench-Mount Dimensions

Fig. 3.2Panel Cutout Dimensions

Dimensions in inches/cm


Physical / Environmental

Case: Each unit is housed in a single piece of heavy-gage aluminum (for instrument dimensions, see Fig.3.1); a simple reassembly procedure allows mountingin the user's precut panel (see Fig. 3.2—maximumpanel thickness allowed is 1/8"); the Model 3004Rackmount Adaptor permits secure mounting of upto four units in a standard 19-inch rack

Operating Temperature Range: 0° F to +130° F (-18° Cto +55° C); assumes dry, noncondensing ambientatmosphere

Weight: Instrument: approximately 2.0 lb (0.9 kg) maxi-mum; Shipping: approximately 3.5 lb (1.6 kg) maxi-mum

Power

Voltage: 105-135 V-AC; 210-260 V-AC optional (addsuffix "F" to model number); any model not employingthe solid-state relay ("S") option may be powered bybattery (11.5-15 V-DC, 500 mA max.; add suffix "B" tomodel number)

Frequency: 50-400 Hz

Consumption: 5 W max. (for Form 1 instruments), 8 W max. (for Form 2 instruments), or 9 W max. (forForm 3 instruments)

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3000 SERIES GENERAL SPECIFICATIONS (cont'd)

Fig. 3.33000 Series Rear Panel Elements

LimitOutput

ConnectorBoard* Scale

SelectionButtons

AC PowerConnector

* “Form 3” instrument only.

PowerON

Switch

TransducerConnector

(Amphenol 225-21021-101)

Spacer Washer(removed whenpanel-mounted

or rack-mounted)

I/OConnector

Board

Decimal Point /Dummy Zero

SelectionSwitches

MODEL

3004 RACKMOUNT ADAPTOR

Fig. 3.4Model 3004 Dimensions


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A family of premium stand-alonesingle-channel conditioners accom-modates many transducer types—

5-, 6-, or 7-wire AC-excitedLVDT's or 3-wire AC-excit-ed variable reluctancetransducers

frequency-generatingtransducers (includingmagnetic pickups andturbine flowmeters)

miscellaneous analog signal sources (including DC-to-DC LVDT's, poten-tiometers, Hall-Effectdevices, photocells, current shunts, etc.)

DC-excited strain gagetransducers (load cells,pressure sensors, etc.)

AC-excited strain gagetransducers (rotary transformer torque sensors, etc.)

With built-in regulatedexcitation, selectablelow-pass active filtering,and internal referencecalibration standards*,these instruments produce themost accurate drift-free analog outputs possible.

LVDT Displacement Sensor

Load Cell

Platen

Spring

Model 3130LVDT Conditioner

Model 3170DC Strain Gage Conditioner

X - Y Recorder

For

ce

Displacement

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Fig. 3.5Using 3000 "Form 1" Conditioners for Spring Testing

In monitoring the production of critical nonlinear springs, QC procedures requirethat the force-displacement characteristics of successive lot samples be plottedon an X-Y recorder. In this system, a Model 3130 LVDT Conditioner measuresspring displacement, while a Model 3170 DC Strain Gage Conditioner simulta-neously measures compression force.

"FORM 1" 3000 Series Instruments:

SIGNAL CONDITIONERS

* Addressable by front-panel push but-tons, or, when used with a centralizeddata acquisition system, by a commonlogic command line.

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Go to a list ofTypical Customer-Specific

3000 Series Instrument Modifications

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± 20000 RANGE ± 10000 RANGE ± 5000 RANGE

"1" DigitUnlit

Unlit orLights as "1"

Unlit orLights as "1"

Last Active Digit (by 5's)

Dummy Zero


Dummy Zero


Dummy Zero

Fig. 3.8Full-Scale Displaysfor Digital IndicatorRanges

Fig. 3.6Using 3000 "Form 2" Conditioner/Indicators for Engine Dynamometry

In this system, a Model 3240A Frequency Conditioner/Indicator measuresand displays engine RPM, using a magnetic pickup and 60-tooth gear. At thesame time, a Model 3278 AC Strain Gage Conditioner/Indicator measuresand displays engine torque. Conditioned high-level outputs are sent to a cen-tral data acquisition system for recording and processing (computation ofhorsepower, efficiency, etc.)

4/10 actual size(approx.)

Model 3240AFrequency Conditioner/Indicator

Model 3278AC Strain Gage Conditioner/Indicator

High-Level Outputs toData Acquisition System

Load

60-Tooth Gear

Magnetic Pickup

Torque Sensor

Engine

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To the basic signal conditioningcapability of Form 1 instruments,"Form 2" 3000 units add threeselectable scales for vivid, rock-solid LED readout of all measuredinputs. As shown in Fig. 3.8, thethree data-display scales are ±5000by "1's," ±10000 by "2's," and ±20000by "5's." Selectable decimal-pointlocations along with optionaldummy zero give decade multiplierfactors from 0.0001 to 10.

Sampling rate of thedigital display is threesamples per second.All conditioner/indicators are sup-plied with a large assortment ofengineering unit legends on a con-venient 4" x 5.5" dry transfer sheet(shown in Fig. 3.7).

For full display specifications, seeGeneral Specifications.


SIGNAL CONDITIONERSWITH DIGITAL INDICATION

Fig. 3.7Legend Sheet

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To the basic signal conditioningcapability of Form 1 instrumentsand the data display capability ofForm 2 instruments, each "Form3" instrument adds two control set-points. These are independentlyadjustable over the full ± range, viafront-panel Coarse and Fine con-trols.

Each setpoint may be designatedas either a HIGH or a LOW limitvalue. Thus, three limit modes areavailable. Units are normallyshipped with LOW/OK/HIGH modeactivated, but you can easily rewirefor either BOTH LIMITS HIGH orBOTH LIMITS LOW. A front-panel"Push-to-Set" button for each limit

Optional internal electromechanicalor solid-state relays are available forall "Form 3" instruments, to allowthe switching of power for annunci-ation and process control on thebasis of existing limit conditions(see "R" or "S" Option).

lets you display therespective setting in proper engineering units.

Individual red front-panel LED's indicate HIGH or LOW LIMIT VIOLA-TION (see Fig. 3.9, below). Suchindication is normally nonlatching,but latching mode is also available.A single green LED indicates NOVIOLATION ("OK").

Both true and complement TTL-compatible logic outputs are avail-able for each limit condition (LOW,OK, HIGH)—see General Specifi-cations. These outputs are nor-mally disabled as soon as theviolation condition ceases to occur,but latching mode is also available.


SIGNAL CONDITIONERSWITH DIGITAL INDICATIONAND HI-LO LIMITS


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Model 3330LVDT Conditioner/Indicator/Controller

LO OK HI

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Fig. 3.9Using a 3000 "Form 3" Conditioner/Indicator/Controller for "GO NO-GO" Dimensional Gaging of Parts

A Model 3330 LVDT Conditioner/Indicator/Controller checks indi-vidual parts for conformance to aprespecified "OK" limit range, withfront-panel indication of limit status.Limit violations can be made to trig-ger TTL-level outputs from the 3330'srear panel for purposes of externalannunciation and process control.Optional internal relays allow directswitching of power on occurrence ofspecific limit violations (e.g., to stopthe belt that brings parts to the mea-surement jig). See also Fig. 3.13.

With the installation of an optionalcircuit board, real-time analog peakcapture is possible for a Form 2 orForm 3 instrument, in addition to itsnormal "tracking" function.

Controlled either by front-panelpush buttons or by a remote user-installed switch, a "P" unit can"freeze" and display the last positiveinput-signal "peak" value to havebeen perceived. The analog outputis held at this value until a RESETcommand is applied.* A subse-quent higher signal excursion dis-ables the "hold," permitting thecapture of subsequent higherpeaks. Because it is digitally held, adisplayed peak value will not decay.The maximum decay rate for a heldanalog output is only 0.1% of fullscale per minute.

For capture of negative "peaks"(signal minima), the input lines maybe inverted.

With all Form 3 instruments, limitsare automatically latched uponpeak capture, and are automaticallyreset on return to normal "track"mode.

For a special "P" version dedicatedto the capture and hold of peaktorque values, see the Model TM3Torque Monitor.

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* To prevent low-level signal noise fromtriggering a "peak hold," the peak cap-ture function is automatically disabledwhen the input is less than 8% of fullscale. If you require peak capture withinthe 0-8% range, contact the factory.

Model3378P

ANALOG PEAK CAPTURE OPTION("P" OPTION)

Load Cell

Model 3370PDC Strain GageConditioner/Indicator/Controllerwith Peak Capture Option

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Fig. 3.10Monitoring Peak Connector Insertion Force

Fo

rce

Time

HeldPeak Value

the ISA standard signal range of 4to 20 mA, corresponding to a rangeof 0 to +5 V. Bipolar ranges of ±16mA and 4 to 12 to 20 mA are also

Load limit for each output exceeds10 kΩ. Output bandwidth is normal-ly 40 Hz; the "G" option can be easi-ly modified, however, for otherbandwidths up to 500 Hz.

available, each corresponding to -5to +5 V. Voltage compliance is +5 Vrelative to Signal Common.

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Operating in this mode, any Form 1or Form 2 3000 Series instrument—or a Model 3363 or Model 3370—can transmit high-accuracymeasurement data as process sig-nals for supervisory monitoring andcontrol. Each "C" unit produces twokinds of analog output simultane-ously: (1) its normal voltage outputand (2) a current output continuous-ly proportional to the voltage signalto within ±0.05%.

As normally shipped, this optiongenerates a current output within

4-20 MA CURRENT OUTPUT OPTION("C" OPTION)

The use of galvanically isolated out-puts prevents ground-loop effectsin interconnections with remotedata-acquisition systems or con-trollers. The presence of two inde-pendent outputs lets you sendcollected data to two different sys-tems or devices, each with its ownground.

With this option, a Form 1 or Form2 instrument can furnish two inde-pendent galvanic outputs, each 0-10 V-DC (2 mA max), full scale.These outputs are completely iso-lated not only from each other butalso from the 3000 instrument's"common."

DUAL GALVANIC ISOLATED OUTPUTS OPTION("G" OPTION)

ControlRoom

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4-20 mA

3000 Instrument with "C" Option

Fig. 3.113000 Instrument as 4-20 mA Transmitter

ADDITIONAL "G" OPTION SPECIFICATIONS

Output Range: ±10 V-DC full scale (2 mA max.), normal; internal controls give approximately ±5% of adjustment authority on both SPAN and ZERO

Common-Mode Range: ±500 V, max.

Common-Mode Rejection Ratio: -120 dB at DC; -60 dB at 60 Hz

Gain: Factory set to 2.00; user-adjustable within ±5%

Linearity: ±0.1% of full scale

Maximum Zero or Span Drift (after warmup of 1/2hour): ±0.2% of full scale*

0-10 V

RemoteChart Recorder

3000 Instrument with "G" Option

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Fig. 3.12Isolated Voltage Output to Strip Chart Recorder

* Applies to the "G" Option only, and does not include possibledrift contributed by the signal conditioner board of the base3000 instrument.

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With this option, a Form 3 instru-ment can switch power for controlaction in all types of open-loop orON-OFF closed-loop operations. It may be used, for example, toactuate alarms or sorting devices,or to start up or shut down externalprocesses. Both relay types arecontrolled directly by the unit'sLIMIT VIOLATION outputs.

The Electromechanical Relay("R" Option) is ideal for DC or low-level switching. Two normally openand two normally closed contactsare rated at 8 amps, 250 V-AC at full

resistive load. Switch lifetime at 1amp resistive load exceeds100,000 operations.

The Solid-State Relay ("S"Option) is suitable for controllingmedium-power AC loads, or forhighly repetitive operations (sinceits lifetime at full resistive loadexceeds 10,000,000 operations).Its contacts (similar to those of theElectromechanical Relay) are ratedat 3 amps, 250 V-AC at full load.Zero-crossing circuitry ensures low EMI.

INTERNAL RELAYS OPTION("R" OR "S" OPTION)

Load Cell

Model 3370SDC Strain Gage Conditioner/Indicator/Controllerwith Solid-State Relay Option

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AAA

SolenoidValve

AC Power

Fig. 3.13Relay-Controlled Filling Operation

This automatic filling operation uses a Model 3370S DC StrainGage Conditioner/Indicator/Controller with internal solid-state relay. The 3370S monitors the container's weight as it fills.When the maximum weight setpoint is reached, the HI limit istripped, the relay is actuated, and the bin's solenoid valve closes.

The Models 3130, 3230, and 3330LVDT Instruments may be usedwith any series-opposed 5-, 6-, or 7-wire LVDT sensors or 3-wire vari-able reluctance transducers thatcan be operated with a 3-kHz fre-quency. Optional remote sensing isavailable for long cables.

The Model 3130 LVDTConditioner is thebasic Form 1 instru-ment.

The Model 3230 LVDTConditioner/Indica-tor is the Form 2instrument, providingvivid front-panel digitalindication of measured

values. The available scales allowready calibration over virtually anymeasurement range, with a widechoice of engineering units. Instru-ment sensitivity and resolutionallow precision to a fraction of amicroinch, if required.

The Model 3330 LVDT Condition-er/Indicator/Controller is theForm 3 instrument, and includesHI/LO limit detection. This feature isuseful in wide variety of "GO NO-GO" dimensional gaging applica-tions, like the one shown in Fig. 3.9.

Working on the synchronous carri-er-demodulator principle, all threeinstruments supply amplitude-regulated 3-kHz AC excitation to thetransducer. Two standard 5-V outputs are produced (see Specifi-cations). Each output is preciselyproportional to LVDT core displace-ment over the full ± range of the

(cont'd)

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GO TO GENERAL 3000 SERIESDESCRIPTION & SPECS

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MODELS

3130, 3230, 3330AC LVDT INSTRUMENTS



LVDT INSTRUMENT SPECIFICATIONS

Input Type: Series-opposed 5-, 6-, or 7-wire LVDT sensor or 3-wire variable reluctance transducer capable of 3-kHzoperation and having primary impedance greater than 80 Ω

Input Range (full-scale): ±0.001 to ±4.000 inches (±0.0254 to±101.6 mm)

Excitation Supplied: 3 kHz, amplitude regulated

Analog Outputs: Two outputs, each ±5 V full-scale with 50%overrange, 5 mA max.; low-pass corner frequencies of 2 Hzand 400 Hz, respectively

Analog Filtering: Active low-pass filters provide -60 dB perdecade above cutoff frequency (“f”); full-scale slew time is1.4/f sec

Output Ripple and Noise: 0.15% of full scale (rms) max. for

400-Hz output; 0.02% for 2-Hz output

Accuracy (typical, following calibration): Varies from 0.1%to 1.0% of calibrated range*

Display Resolution (Models 3230 and 3330): 0.02% of fullscale

* Depending on the linearity characteristics of the LVDT elementitself. The resolution and accuracy of these instruments areconsiderably in excess of what is generally useful in practicalapplications. In high-sensitivity LVDT measurement, the ultimatelimits of accuracy are not imposed by the instrumentation, butby considerations of dimensional stability that pertain to thetransducer, the fixture, and/or the measured object itself. In gen-eral, accuracy to 0.0001 inch or better can be achieved only withcarefully designed fixtures and under conditions of precise tem-perature control.

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MODELS


(cont’d)sensor. Sensitivity is widelyadjustable, allowing full-scale outputfor input displacements as small as±0.001 inch (±0.0254 mm).

A unique phase-control circuit auto-matically and continuously adaptsthe instrument to any signal phaseshift occurring in the transducer orcable. This simplifies setup proce-dures, and ensures optimum sensi-tivity and linearity for each type ofLVDT sensor employed.

Span adjustment is accomplishedthrough 12-turn Coarse and Finefront-panel controls plus 5 internalrange multiplier switches. Nominalmaximum sensitivity is 10 mV (in-phase component) for full-scaleinput.


3000 Series options applying to theLVDT instruments include

•Analog Peak Capture(Models 3230 and 3330)

•4-20 mA Current Output(Models 3130 and 3230)

•0-10 V-DC Dual Galvanic Isolated Outputs(Models 3130 and 3230)

•Internal Electromechanical Relays (Model 3330)

•Internal Solid-State Relays(Model 3330)

•12 V-DC Battery-Powered Operation or Nominal 230 V-AC Operation(Models 3130, 3230, and 3330)


LVDT Load Cell

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Model 3130

Model 3130

Material Sample

X - Y Recorder

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Fig. 3.14(a)Stress-Strain Recording


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Model 3230

Fig. 3.14(b)Continuous ThicknessMeasurement

(cont'd)

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MODELS


(cont’d)

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OK

STOP

Logic OutputsModel 3330

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Fig. 3.14(c)Roller Gap Monitoring

The Models 3140A, 3240A, and3340A Frequency MeasuringInstruments accept any type of ACor pulse input signal, single-endedor differential, irrespective of wave-form. Each instrument producesone standard 5-V output (see Spec-ifications), each precisely propor-

tional to the frequencyof the source. Theseconditioners are usefulfor measuring rpm,flow, and other phe-nomena that can besensed by frequency-generating devices likemagnetic pickups orturbine flowmeters—

see Fig. 3.15(a) and Fig. 3.15(b).

The Model 3140A FrequencyConditioner is the basic Form 1instrument.

The Model 3240A FrequencyConditioner/Indicator is the Form2 instrument, providing vivid front-

panel digital indication of measuredvalues, scalable in desired engi-neering units.

The Model 3340A FrequencyConditioner/Indicator/Controlleris the Form 3 instrument, andincludes HI/LO limit detection. Thisfeature is useful in various controland safety alarm functions (e.g.,shaft overspeed, low oil flow, etc.).

A wide selection of frequencyranges accommodates virtually anymechanical measurement require-

(cont'd)

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FREQUENCY INSTRUMENT SPECIFICATIONS

Input Type: Any AC or unipolar pulse signal, floating orgrounded, irrespective of waveform

Input Threshold Level: Automatic triggering at 75% and 25%of the input amplitude

Input Ranges (full-scale): Switch-selectable 0 to 100, 200,500, 1000. 2000, 5000, 10000, 20000, or 50000 Hz

Sensitivity (full-scale): Continuously adjustable from 0.1 to200 V*

Excitation Supplied: -9 V-DC auxiliary supply available onrear connector

Analog Output: One output, ±5 V full-scale with 50% over-range, 5 mA max.; low-pass corner frequency of 2 Hz for100, 200, and 500 Hz ranges; 10 Hz for all other ranges

Output Ripple and Noise: Less than 0.1% of full scale from20 to 100% of the selected range

Step-Function Response Time (to 99% of final full-scalevalue): 1.8 sec for 100-, 200-, and 500-Hz ranges; 350 msecfor all other ranges

Accuracy (typical, following calibration): 0.05% of full scale

Display Resolution (Models 3240A and 3340A): 0.02% offull scale

MODELS

3140A, 3240A, 3340A

FREQUENCY MEASURINGINSTRUMENTS

The Models 3140A, 3240A, and 3340A are similar in appear-ance to the instruments shown.

* Input sensitivity decreases above 10 kHz by 0.01 V/kHz (to 0.5 Vat 50 kHz).

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MODELS

3140A, 3240A, 3340A

FREQUENCY MEASURINGINSTRUMENTS (cont’d)

ment. Input sensitivity level is con-tinuously adjustable via front-panelcontrol.

A simple procedure, using an inter-nal crystal reference oscillator andadjustable span controls, allowsprecise calibration in terms of fre-quency, rpm, gallons per hour, orany other appropriate unit. An aux-iliary excitation supply of -9 V-DC isavailable on the rear connector.


3000 Series options applying to thefrequency instruments include

•Analog Peak Capture(Models 3240A and 3340A)

•4-20 mA Current Output(Models 3140A and 3240A)

•0-10 V-DC Dual Galvanic Isolated Outputs(Models 3140A and 3240A)

•Internal Electromechanical Relays (Model 3340A)

•Internal Solid-State Relays(Model 3340A)

•12 V-DC Battery-Powered Operation or Nominal 230 V-AC Operation(Models 3140A, 3240A, and3340A)

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Model 3240A

MagneticPickup

Fig. 3.15(a)Flow Indication

ToDatalogger

Load

60-Tooth Gear

Magnetic Pickup

Engine

Model 3140A

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Fig. 3.15(b)Measuring Engine RPM

The Models 3163, 3263, and 3363Analog Input Instruments acceptinputs from various analog voltagesources, including DC-to-DCLVDT’s, potentiometer-type sen-sors, Hall-Effect devices, photocells,current shunts, and the outputs ofother instrument systems with vari-

ous grounding configu-rations and voltage/impedance levels.

The Model 3163 Ana-log Input Conditioneris the basic Form 1instrument.

The Model 3263 Ana-log Input Condition-

er/Indicator is the Form 2instrument, providing vivid front-panel digital indication of measuredvalues, scalable in desired engi-neering units.

The Model 3363 Analog InputConditioner/Indicator/Controller

is the Form 3 instrument, andincludes HI/LO limit detection withcontrol output.

The signal source can be groundedor floating, and may use 2-, 3-, or 4-wire cabling (see Fig. 16(a)). A reg-ulated 10-V supply is provided forexcitation of potentiometers, DC-to-DC sensors, and similar devices.Full-scale sensitivity is continuouslyadjustable in four jumper-selectableranges. Three standard 5-V out-puts are produced (see Specifica-tions).

With a sensitive, high-impedance,floating differential input, wide com-

(cont'd)

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MODELS

3163, 3263, 3363ANALOG INPUT INSTRUMENTS



ANALOG INPUT INSTRUMENT SPECIFICATIONS

Input Type: 2-, 3-, or 4-wire DC voltage source, floating orgrounded

Input Ranges (full-scale): Full-scale sensitivity continuouslyadjustable in jumper-selectable ranges of 50 to 500 mV, 500mV to 5 V, 5 to 50 V, and 50 to 250 V

Excitation Supplied: Regulated 10V ±0.02%, 20 mA max., forexcitation of potentiometers, DC-to-DC sensors, and similardevices

Analog Outputs (±5 V Full-Scale): Three outputs, each ±5 Vfull-scale with 50% overrange, 5 mA max.; low-pass cornerfrequencies of 2 Hz, 200 Hz, and 2 kHz, respectively

Common-Mode Range: ±100 V-DC

Common-Mode Rejection Ratio: -70 dB, DC to 60 Hz

Input Impedance: 1 MΩ (all ranges)


Output Ripple and Noise: 0.15% of full scale (rms) max. for200-Hz and 2-kHz outputs; 0.02% of full scale (rms) max. for2-Hz output

Accuracy (typical, following calibration): 0.1% of full scalefor 60 days (“hands off”) following initial calibration

Display Resolution (Models 3263 and 3363): 0.02% of fullscale

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3163, 3263, 3363ANALOG INPUT INSTRUMENTS

(cont’d)



mon-mode range, and exceptionalcommon-mode rejection, thesemodels can be used to obtain difficult low-level signals from highlyoff-ground sources, without com-mon-mode AC or DC offset prob-lems.

Selectable low-pass active filteringallows the smoothing of unwantednormal-mode dynamic compo-nents that might prevent stable digital conversion or control action.


3000 Series options applying to theanalog input instruments include


•4-20 mA Current Output(Models 3163, 3263, and 3363)





e DC-to-DCLVDT

Fig. 3.16(a)Signal Source Configurations for the Models 3163, 3263, 3363

AAAAAAAAAAAAAAAAAAAAAAAA

Model 3263

AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

230 V3 ø

Hall-EffectWatt Sensor

Watts

Fig. 3.16(b)3-Phase AC Power Measurement

The Models 3170, 3270, and 3370DC Strain Gage Conditioners arehighly accurate DC instruments foruse with load cells, pressure sen-sors, and other strain gage trans-ducers employing a 4-arm bridge.

The Model 3170Strain Gage Condi-tioner is the basicForm 1 instrument.

The Model 3270Strain Gage Condi-tioner/Indicator is theForm 2 instrument,providing vivid front-panel digital indication

of measured values, scalable indesired engineering units.

The Model 3370 Strain GageConditioner/Indicator/Controlleris the Form 3 instrument, and

includes HI/LO limit detection withcontrol output (see Fig. 3.13 andFig. 3.17(c)).

Advanced circuit design overcomesmany of the errors traditionallyafflicting the strain gage measure-ment process, resulting in threehigh-level, drift-free, noise-free ana-log outputs (see Specifications).Nearly all mechanical measurementand control requirements are cov-ered by these three simultaneouslyavailable outputs.

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DC STRAIN GAGE INSTRUMENT SPECIFICATIONS

Input Type: Conventional 4-arm strain gage bridge, nominal90 to 2000 Ω

Input Range (full-scale): Nominal sensitivity 1 to 8 mV/V, full scale*

Excitation Supplied: Regulated 5 or 10 V-DC, user selec-table**

Analog Outputs: Three outputs, each ±5 V full-scale with 50%overrange, 5 mA max.; low-pass corner frequencies of 2 Hz,200 Hz, and 2 kHz, respectively

Common-Mode Rejection: Greater than 80 dB

Input Impedance: Greater than 100 MΩ


Output Ripple and Noise: 0.15% of full scale (rms) max. for200-Hz and 2-kHz outputs; 0.02% of full scale (rms) max. for2-Hz output

Accuracy (typical, following Calibration): 0.05% of full scale

Display Resolution (Models 3270 and 3370): 0.02% of fullscale***

* Ten-turn coarse and fine front-panel controls will balance 1.5mV/V initial unbalance and allow span adjustment over the stat-ed full-scale sensitivity.

** Transducers with sensitivity from 4 to 8 mV/V, full scale, or withbridge resistance of 120 Ω or less, must use 5-V excitation.

*** Includes the combined effects of nonlinearity, random noise,line-voltage variation between 105 and 130 volts, ambient temperature variation of ±20° F about starting value, and six-months drift of zero and span. Errors attributable to the transducer are not included.

MODELS

3170, 3270, 3370DC STRAIN GAGEINSTRUMENTS

Other important features include

•remote sensing and regulationof bridge excitation—eliminateserrors from temperature effectson cable resistance

•seven-wire calibrationcircuitry—applies the internalshunt calibration resistor at thetransducer terminals, therebyeliminating significant calibrationtransfer error in long-cable installations

•true differential input, with bet-ter than 80 dB of common-moderejection—eliminates errors fromcommon-mode pickup and possi-ble “ground-loop” coupling

•input impedance in excess of100 megohms preserves thevalidity of factory calibration, pre-

vents conversion of common-mode to normal-mode signals,and eliminates remaining errorsattributable to cable resistance.Allowable cable length has virtu-ally no practical limits.

•elimination of both short-termand long-term drift through anadvanced solid-state chopperstabilization technique, while pre-serving the full frequency pass-band, free of chopper noise; therated accuracy is obtained with-out “warm-up” period or periodic“tweaking” of controls

•active low-pass filteringsmooths unwanted dynamic signal components arising fromvibration, power impulses, etc.,that might prevent stable digitalconversion or control action

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3170, 3270, 3370DC STRAIN GAGEINSTRUMENTS (cont’d)

Model 3170To Datalogger

AAAAAAAAAAAAAAAAAAAAAAAA

++

Fig. 3.17(a)Tank Level Measurement Using a Single Load Cell

For a special "P" version of theModel 3370 dedicated to the cap-ture and hold of peak torquevalues, see the Model TM3 TorqueMonitor. For conditioning inputsfrom AC-excited strain gage trans-ducers, see the Models 3178,3278, and 3378.


3000 Series options applying to theDC Strain Gage instruments include


•4-20 mA Current Output(Models 3170, 3270, and 3370)





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Model 3370

PressureTransducer

AAAAAAAAAAAA

AAAAA

AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

HydraulicHose

AA OK

REJECT

Logic Outputs

CapHigh-

Pressure Air

Fig. 3.17(c)Leak-Testing of Hydraulic Hoses

Model 3170To Datalogger

AAAAAAA AAAA

++Summing

Junction Box

Fig. 3.17(b)Tank Level Measurement Using Four Load Cells and aFour-Channel Junction Box

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Tension Load Cell

AAAAAAAA

Material Sample

Model 3270

AAAAAA

AAAAAAAAAAA

Chart Recorder

Fig. 3.17(d)Measuring Material Rupture Strength

Model 3270

Float

Load Cell

Fuel

ToJet Engine

AAAA AAAAAAAA

Fig. 3.17(e)Measuring Mass Flow of Fuel Consumed

Additional applications ofthe DC Strain Gage Instruments are illustratedin:

•Fig. 3.5 (Spring Testing)

•Fig. 3.10 (MonitoringPeak Connector Inser-tion Force)

•Fig. 3.13 (Relay-Con-trolled Filling Operation)

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Model 3370

AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

Load Cell

Fig. 3.17(f)Measuring Thrust inRocket Propellant Research

Being phase-sensitive carrier-demodulator instruments (ratherthan fully DC), the Models 3178,3278, and 3378 AC Strain GageConditioners are intended forapplications involving transformer

coupling to the trans-ducer bridge (as withrotary-transformertorque sensors) andfor applications requir-ing high sensitivity withoptimum signal-to-noise characteristics—as, for example, wherethe electrical environ-

ment is especially noisy and thereis a need for high amplification oflow signal levels.

The Model 3178 Strain GageConditioner is the basic Form 1instrument.

The Model 3278 Strain GageConditioner/Indicator is the Form2 instrument, providing vivid front-panel digital indication of measuredvalues, scalable in desired engi-neering units. See Fig. 3.6 for useof the 3278 in a typical enginedynamometry application.

The Model 3378 Strain GageConditioner/Indicator/Controlleris the Form 3 instrument, andincludes HI/LO limit detection withcontrol output.

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AC STRAIN GAGE INSTRUMENT SPECIFICATIONS

Input Type: Conventional 4-arm strain gage bridge, nominal90 to 1000 Ω

Input Range (full-scale): Nominal sensitivity 0.5 to 5 mV/V, full scale*

Excitation Supplied: 2 V-AC (rms) at 3.28 kHz

Analog Outputs: Two outputs, each ±5 V full-scale with 50%overrange, 5 mA max.; low-pass corner frequencies of 2 Hzand 400 Hz, respectively

Common-Mode Rejection: Greater than 80 dB

Input Impedance: Greater than 100 MΩ


Output Ripple and Noise: 0.15% of full scale (rms) max. for400-Hz output; 0.02% of full scale (rms) max. for 2-Hz output

Accuracy (typical, following Calibration): 0.05% of full scale

Display Resolution (Models 3278 and 3378): 0.02% of fullscale**

* Ten-turn coarse and fine front-panel controls will balance 1.5mV/V initial unbalance and allow span adjustment over the stat-ed full-scale sensitivity.

** Includes the combined effects of nonlinearity, random noise,line-voltage variation between 105 and 130 volts, ambient temperature variation of ±20° F about starting value, and six-months drift of zero and span. Errors attributable to the transducer are not included.

MODELS

3178, 3278, 3378AC STRAIN GAGEINSTRUMENTS

Other important features include

•remote sensing and regulationof bridge excitation—eliminateserrors from temperature effectson cable resistance

•seven-wire calibrationcircuitry—applies the internalshunt calibration resistor at thetransducer terminals, therebyeliminating significant calibrationtransfer error in long-cable installations

•true differential input, with bet-ter than 80 dB of common-moderejection—eliminates errors fromcommon-mode pickup and possi-ble “ground-loop” coupling

•input impedance in excess of100 megohms preserves thevalidity of factory calibration, pre-

vents conversion of common-mode to normal-mode signals,and eliminates remaining errorsattributable to cable resistance.Allowable cable length has virtu-ally no practical limits.

•elimination of both short-termand long-term drift through anadvanced solid-state chopperstabilization technique, while pre-serving the full frequency pass-band, free of chopper noise; therated accuracy is obtained with-out “warm-up” period or periodic“tweaking” of controls

•active low-pass filteringsmooths unwanted dynamic signal components arising fromvibration, power impulses, etc.,that might prevent stable digitalconversion or control action


3000 Series options applying to theAC Strain Gage instruments include


•4-20 mA Current Output(Models 3178 and 3278)





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MODELS

3178, 3278, 3378AC STRAIN GAGEINSTRUMENTS (cont’d)

Model 3378

AAAAAAAA AAAAAAAAAAAAAAAAAAAAA

ReactionTorqueSensor

RotatingDrum

FluidContainer

Fig. 3.18Viscosity Testing

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MODEL

TM3 TORQUE MONITOR

Peak air-tool torque is a criticalparameter in many quality controloperations. A special "P" version ofthe Model 3370 DC Strain GageConditioner/Indicator/Control-ler, the Model TM3 is a simple, eco-nomical benchtop unit for automaticcapture, display, and evaluation ofthe true "real-time" maximum valueexperienced by a single analogtorque signal. It can be used withall kinds of transducerized air-oper-ated strain gage torque tools—and,as shown in Fig. 3.19, below, caneven be used to test performanceof such tools themselves.

Peak-capture mode and reset con-trol are fully automatic. Thus, aftereach peak is captured and dis-played, the operator need onlyplace the air tool on the next fasten-er to be tested, and the unit willinstantly "auto-reset" for the nextmeasurement. A factory-set thresh-old of approximately 15% of full-scale output prevents triggering ofthe peak-capture function byinduced low-level signal noise,

when the tool socket is seated onthe bolt to be tightened (if yourequire peak capture within the15% range, contact the factory).

TM3 specifications are identical tothose of the Model 3370 with refer-ence to basic signal-conditioning,digital-indication, and limit-monitor-ing capabilities. In addition, a"HELD PEAK" analog output ismomentarily available after everypeak capture (for about one sec-ond) at the TM3's rear I/O connec-tor, for recording by an external

instrument or system. Front-panellimit status indicators (HIGH, LOW,and OK) are latched until auto-reset,as are rear-connector logic outputs,which are available in both true andcomplement for each limit condi-tion.

For optional battery power (11.5-15V-DC, 500 mA max.), specify theModel TM3B. Special versions forhigh-sensitivity semiconductorbridges (up to 100 mV/V) can alsobe ordered.

ReactionTorqueSensor

Model TM3

AAAA OK

REJECT (LO)

Logic Outputs

AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA REJECT (HI)

Fig. 3.19Testing Torque Wrenchesfor Proper Slip Point

To

rqu

e

Time

HeldPeak Value

Documents

NSTRUMENTS ATALOG IC-3 3000 I ERIES I - Daytronic3K-2 I NTRODUCTION 2000 S ERIES 3000 S ERIES 3500 S ERIES 4000 S ERIES INSTRUMENTS CATALOG IC-3 Daytronic Corporation 2211 Arbor Blvd