7526A Precision Temperature/Pressure Process Calibrator

7526A Precision Temperature/Pressure Process Calibrator

7526A Precision Temperature/Pressure Process Calibrator

©2012 Fluke Corporation Fluke 7526A Precision Process Calibrator 2

Introducing the7526A Precision Process CalibratorIntroducing the7526A Precision Process Calibrator

• Value proposition

• Typical applications

• Key features & benefits

• Product overview

• Product features

• Summary specs

• Options & accessories

A “best fit” for process instrumentation calibration


7526A Value Proposition7526A Value Proposition

• Balances precision and versatility with cost

• The 7526A is less expensive than high-end multi-product calibrators, yet more precise and versatile than handheld field calibrators

• Calibrates wide ranging workload

Versatility, precision & valueThe 7526A offers an isolated measurement channel allowing it to precisely, and simultaneously, source and measure temperature & electrical parameters. Pressure measurement can be viewed in both displays in different units of measure.

7526A


Typical ApplicationsTypical Applications

IndustryIndustry Applications Applications Calibration workloadCalibration workloadPharmaceutical/Bio-tech

Monitor temp/pressure process, monitor freezers/ovens/incubators, freeze-drying, SIP

Temp/pressure transmitter, pressure gauges, handheld calibrator, temp readout, chart recorder

Food Monitor process temp, food dryers, monitor cold storage, monitor refrigeration equipment, SIP

Temp/pressure transmitter, temp readout, limit alarm, PID controller

Oil & Gas Monitor pipeline provers, custody transfer

Temp/pressure transmitter, pressure gauges, flow transmitter

Chemicals Monitor temp/pressure reaction conditions, refrigeration, boilers

Temp/pressure transmitter, limit alarms, pressure gauges

Electronic Equipment Manufacturer

Manufacturing electronic devices

Automatic test station

3rd Party Calibration Lab Service industries listed above

All of the above


7526A Key Features & Benefits7526A Key Features & Benefits

Feature Feature BenefitBenefit

Improved thermocouple accuracy

Can calibrate Documenting Process Calibrators (2:1 TUR) and nearly all handheld temperature & pressure calibrators

Switch test (unique to 7526A)

Increased workload. Not every temperature source, such as a drywell, includes a switch-hold function. Pressure sources do not.

Simultaneous source and measure

Calibrate more DUTs in less time. See results of an adjustment immediately.

MET/CAL® Calibration Software compatible

Write automated procedures, create reports.

Value Costs less than a DPC, highly versatile, precise but competitively priced.


7526A Product Overview7526A Product Overview

• Precision Temperature/PressureProcess Calibrator

• Sources and measures:

– Thermocouples (13 types)

– RTDs (9 types)

– Thermistors (YSI-400)

– Voltage (0 to 100 Vdc)

– Resistance (0 Ω to 4 kΩ)

– Current (100 mA output / 50 mA input)

• Measure only:

– Pressure (0 to 700 bar / 10,000 psi)


7526A Product Overview (Left Half)7526A Product Overview (Left Half)

DC voltage output terminals0 Vdc to 100 VdcAccuracy: 30 ppm (+3 μV)

DC current output terminals0 mA to 100 mAAccuracy: 50 ppm

RTD/Ω output terminals (two-wire)5 Ω to 4 kΩ, Accuracy: ± 0.05 ºC, –200 to 630 ºC

Four-wire RTD/Ω input terminalsAccuracy: ±0.02 ºC Pt 385, 100 Ω, –80 to 100 ºC

Isolated pressure module inputAccepts Fluke 700 & 525A series pressure modules

Thermocouple input/output terminalAccuracy: ± 0.1 ºC–100 to 800 ºC (type K)


7526A Product Overview (Right Half)7526A Product Overview (Right Half)

Isolated input terminals Allows simultaneous source and measure dc voltage (0 to 100 V)dc current measurement (0 to 50 mA)Switch-test input 24 V dc loop power supply

Numeric and secondary function keys

Isolated input controlsdc voltage/current Switch test mode24 Vdc power supply250 Ω HART resistorPressure input mode

Cursor controls

Input/Output Function Keysdc voltage/currentTC/RTD Pressure modeUnit typeStby/Operate


7526A Product Overview (Rear Panel)7526A Product Overview (Rear Panel)

RS-232 Port GPIB IEEE-488 Service port Chassis ground

Power line voltage selector and fuse compartment

AC power inlet 120/240 AC

Power switch


7526A Product Features7526A Product Features

STBY/OPR •In Standby mode, changes to the output value are not applied until you select the Operate mode•In Operate mode, each change to the output value is applied immediately•Voltages more than 30 V are not applied. The mode automatically reverts to Standby for safety

• In Thermocouple mode, move through the thermocouple types (including millivolts)

• In RTD/Ohms mode, move through the RTD types (including ohms)

• In Pressure mode, move through the pressure units

Select a secondary function from the numeric keypad



HART •Enables a 250 Ω internal resistor

•Without the loop resistance in place, the DC power supply would “short out” the communicator’s AC voltage signal

•The presence of a loop resistor in the circuit prevents the DC power supply from “loading” the AC voltage signal by the communicator.

•Some minimum loop impedance is needed so that the HART signal can be ‘seen’ or ‘read’ by a HART master, like a HART communicator or HART modem.

LOOP PWR•Turns on an internal 24 Vdc power supply in series with the current measurement circuit

•Used to power 4 – 20 mA transmitters

∿

↓∿ ↓

HARTtransmitter

HART communicator

250 < R < 1100

Powersupply

Computer



RTD and Ohms Measure/Source•Measures & Sources all common RTD types

•Stores CVD coefficients for up to five RTDs

•Stores coefficients for one SPRT (ITS-90)

•Resistance from 0 Ω to 4 kΩ.

RTD types:

•Pt 385 100 Ω, 200 Ω, 500 Ω, 1000 Ω•Pt 3926 100 Ω•Pt 3916 (JIS) 100 Ω•Ni120 120 Ω•Cu 427 (Minco) 10 Ω•YSI 400 thermistor



Thermocouple (TC) Measure/SourceMeasure & sources all common thermocouple types and basic millivolts from -10.0 to 75.0 mV

Thermocouple types: B, C, E, J, K, L, N, R, S, T, U, XK, BP

Pressure Measure•The isolated pressure display uses the same physical pressure connector as the primary display•Both displays can show pressure at the same time •The same source can be shown in different pressure units


7526A Pressure Modules7526A Pressure Modules



Preset setpoints

Nine preset output setpoints can be stored and recalled for each of these output modes:

•Voltage•Current•Each thermocouple type (including mV)•Each RTD type (includes each of the five custom curves)

Switch Test Mode•When in Switch Test mode the Calibrator can sense a contact transition (closed or opened)

•At the time of the transition, the Calibrator records the value and units shown on the primary display



Remote Interface

•RS-232 or GPIB (IEEE-488) can control 7526A from a PC

•A serial to USB adapter cable is included as standard with the 7526A

•Individual commands can be typed into terminal emulator software

•MET/CAL compatible – write automated procedures and generate calibration reports


7526A Workload7526A Workload

Product TypesTwo wire transmittersI/P convertersP/I convertersFourwire conditionersPressure switchesPressure GaugesLimit alarmsPanel metersPID controllersThermometersIsolatorsDMMs Chart Recorders

CompaniesRosemountMoore industriesWilkerson InstrumentsM-SystemsAPI OmegaNewportYokogawaEuthrothermWestinAnalog DevicesAction InstrumentsCR Magnetics


7526A Summary Specs7526A Summary Specs


7526A Summary Specs (cont.)7526A Summary Specs (cont.)


Convert Spec in PPM to % ReadingConvert Spec in PPM to % Reading

Convert a spec in ppm to % error of reading

1. Divide accuracy spec (30 ppm) by 1,000,000=30 ppm/1,000,000 = 0.00003

2. Multiply reading (10 V) by result above=10 V x 0.00003 = 0.0003 V

3. Add floor offset to voltage error (100 µV in this case)=0.0003 V + 0.0001 V = 0.0004

4. Add combined voltage error to reading= 0.0004 ± 10 V = 10.0004 or 9.9996

5. Divide result by reading = 10.004 V / 10 V = ± 0.004%

Example:

A part per million simply means a fraction of 1/1,000,000 Accuracy is expressed as ppm of reading + floor offsetAssume we are using the 0 to 10 V range and reading 10 V


7526A Standard & Optional Equipment7526A Standard & Optional Equipment

Included in the box:

•7526A Precision Process Calibrator•Users Manual CD-ROM•Getting Started•AC Mains Cord•Thermocouple Shorting Jumper•NIST Traceable Calibration Report•USB to Serial Adapter Cable

Options and accessories:

•5520A-525A Leads kit•Y7526A Rack Mount kit•Fluke 700 and 525A-P series pressure modules•MET/CAL with 7526A Function Select Code (FSC)•MET/CAL 7526A calibration procedure•Optional accredited calibration


QuestionsQuestions

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Appendix – P/I TransmitterAppendix – P/I Transmitter


Appendix – I/P TransmitterAppendix – I/P Transmitter


Appendix – V/I TransmitterAppendix – V/I Transmitter


Appendix – RTD TransmitterAppendix – RTD Transmitter


Appendix – TC TransmitterAppendix – TC Transmitter


Appendix – RTD IndicatorAppendix – RTD Indicator


Appendix – Temperature Switch TestAppendix – Temperature Switch Test


Appendix – Pressure Switch TestAppendix – Pressure Switch Test

Documents

7526A Precision Temperature/Pressure Process Calibrator