1. 7526A Precision Temperature/Pressure Process Calibrator

2. Introducing the 7526A 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

3. 7526A 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
7526A
The 7526A meets the needs of labs that cannot fund higher priced instruments while providing the precision required to get the job done
More precise than handheld process calibrators
Less expensive than high-end multi-product calibrators like the Fluke 5080 ($13k)
Poor man’s calibrator
Versatility, precision & value
The 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.

4. Typical Applications Industry Applications Calibration workload
Pharmaceutical/
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
Same customers that would purchase the 914X
Benchtop rather than field

5. 7526A Key Features & Benefits
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.

6. 7526A Product Overview Precision Temperature/Pressure
Process 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)
Used to calibrate temp/pressure transmitters
Transmitters primarily used in process industries such as pharma, bio-tech, food, chem, petrol, etc.
Sources and measures TC, RTD, voltage, resistance, current
Measures pressure when combined with a pressure module or transmitter

7. 7526A Product Overview (Left Half)
DC voltage output terminals
0 Vdc to 100 Vdc
Accuracy: 30 ppm (+3 μV)
DC current output terminals
0 mA to 100 mA
Accuracy: 50 ppm
RTD/Ω output terminals (two-wire)
5 Ω to 4 kΩ,
Accuracy: ± 0.05 ºC, –200 to 630 ºC
Terminal binding posts are made of a special copper alloy to decrease thermal EMFs.
Discreet wires or standard banana plugs can be used.
The HI/LO pairs are distanced for standard dual banana plugs
Four-wire RTD/Ω input terminals
Accuracy: ±0.02 ºC
Pt 385, 100 Ω, –80 to 100 ºC
Isolated pressure module input
Accepts Fluke 700 & 525A series pressure modules
Thermocouple input/output terminal
Accuracy: ± 0.1 ºC
–100 to 800 ºC (type K)

8. 7526A Product Overview (Right Half)
Isolated input controls
dc voltage/current
Switch test mode
24 Vdc power supply
250 Ω HART resistor
Pressure input mode
Numeric and secondary function keys
Cursor controls
Input/Output Function Keys
dc voltage/current
TC/RTD
Pressure mode
Unit type
Stby/Operate
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

9. 7526A Product Overview (Rear Panel)
Power line voltage selector and fuse compartment
Power switch
1) Serial to USB adapter cable included as std
RS-232 Port
GPIB IEEE-488
Service port
Chassis ground
AC power inlet
120/240 AC

10. 7526A 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
1) STBY/OPR is a safety feature that prevents unwanted application of source voltage
Select a secondary function from the numeric keypad

11. 7526A Product Features 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. ∿ ∿↓ ↓
HART
transmitter
HART communicator
250 < R < 1100
Power
supply
Computer
“HART” is an acronym for Highway Addressable Remote Transducer.
Superimposes digital communication signals [frequency shift keying (FSK)] on top of the 4-20mA signal; does not interfere with the analog signal.
Enables two-way field communication to take place.
Additional information beyond the normal process variable (P.V.) is communicated to/from a smart field instrument.
LOOP PWR
Turns on an internal 24 Vdc power supply in series with the current measurement circuit
Used to power 4 – 20 mA transmitters

12. 7526A Product Features 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 Ω, 200 Ω, 500 Ω, 1000 Ω
Pt Ω
Pt 3916 (JIS) 100 Ω
Ni Ω
Cu 427 (Minco) 10 Ω
YSI 400 thermistor
1) Stores CVD coefficients for five unique RTDs

13. 7526A Product Features Thermocouple (TC) Measure/Source
Measure & sources all common thermocouple types and basic millivolts from 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
Can display pressure source in two different UoM

14. 7526A Pressure Modules

15. 7526A Product Features 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
1) Switch test can test limit alarm switches

16. 7526A Product Features 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
1) FSC (function select code) – describes instrument functions so that the instrument can be called out in Met/Cal procedures

17. 7526A Workload
Two-wire transmitters, calibrators, Pressure to Current converters, transducers, signal conditioners and temperature probes
are all examples of the 7526A’s workload.

18. 7526A Summary Specs

19. 7526A Summary Specs (cont.)

20. Convert Spec in PPM to % Reading
Convert a spec in ppm to % error of reading

21. 7526A 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

22. Questions ?

23. Appendix – P/I Transmitter
1) Display pressure in the left display, measure current loop in the right display

24. Appendix – I/P Transmitter

25. Appendix – V/I Transmitter

26. Appendix – RTD Transmitter

27. Appendix – TC Transmitter

28. Appendix – RTD Indicator

29. Appendix – Temperature Switch Test
1) 914X w/out process electronics

30. Appendix – Pressure Switch Test
1) Hand pump pressure source, switch test