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PIECAL 525B Automated Thermocouple & RTD calibrator


Practical Instrument Electronics (PIE) are pleased to introduce the New Model 525B, which replaces the PIE Model 525. This moves their Dual Thermocouple & RTD calibrator to the rugged Evolution style enclosure with a rubber boot and tilt stand for bench use.

The PIECAL 525B combines features from the PIECAL 311 Automated RTD Calibrator & PIECAL 422 Automated Thermocouple Calibrator.

Other features include:

  • 14 Thermocouple types 
  • RTD types for Platinum 10, 50, 200 & 500 Ohm for the 1.3850 (IEC 751/DIN) curve
  • More accurate & stable cold junction compensation 
    NIST Traceable Cold Junction Sensor in isothermal block
  • Large, backlit display 
    Shows millivolts and cold junction temperature while displaying thermocouple temperature. 
    Shows ohms while displaying RTD temperature
  • Troubleshoot RTD Sensors & Instruments
    Automatic detection of 2, 3 or 4 wire connections indicates when individual wire connections are open. Verify proper instrument operation by measuring the excitation current
  • Calibrate Thermocouple instruments to 0.1 & 0.01 °F & °C
    Types J, K, T, E, R, S, B, N, G, C, D, L (J DIN), U (T DIN) & P (Platinel): -13.000 to 80.000 mV
  • Calibrate RTD instruments to 0.1 & 0.01 °F & °C
    Pt 10, 50, 100, 200, 500 & 1000 Ohm (3850)
    Pt 100 Ohm (alpha=3902, 3916, 3926)
    Cu 10 & 50 Ohm and Ni 120 Ohm
  • Calibrate with Confidence
    Resolution to 0.01 °F & °C; Accurate to 0.2°
    Cold Junction Sensor Accurate to 0.05°C
  • Perform Heat Treating Surveys & Accuracy Tests
    Meets or exceeds the requirement of AMS 2750 as both a Secondary Standard Instrument and as a Field Test Instrument
  • Troubleshoot RTD Sensors & Instruments
    Automatic detection of 2, 3 or 4 wire connections indicates when individual wire connections are open. Verify proper instrument operation by measuring the excitation current.
  • Faster Calibrations
    Instantly select three outputs with EZ-CHECK switch
    Easily find trip points with two speed EZ-DIAL knob & Automatic Stepping
  • Easily Change Thermocouples and RTD Types & Scale
    Double click to select Thermocouples or RTD type & °F & °C
  • Use in the Plant, Field or Shop
    Includes Rubber Boot and mV Test Leads
    Low profile switches resist accidental damage
    Brass screws for Thermocouple wires plus mini Thermocouple socket
  • Easy-to-Read Display
    Turn on the backlight to read in dark areas of the plant
  • Simple “No Tool” Battery Changes
    Four inexpensive “AA” batteries
  • Verify Resistance, Cold Junction Temperature & Output
    Secondary Display of Resistance for RTDs and compensated millivolt setting and cold junction temperature for T/C.


An experienced manufacturer of calibration
equipment for the process industry.