Thermocouple calibrator T254


All Tinycal series instruments have a dual function: generation/simulation and measurement. The keys on the front panel of the instrument allow configuration for the generation of set values in engineering units or percentages. The panel keys also allow the generation in jumps that can be programmed from 1 to 30 seconds per jump, which is stored thanks to its 6 configuration keys. The simulation from the instrument – T254 and T264 – can be configured to simulate the sensor response (Pt100 or selected thermocouple type).

All instruments in the Tinycal family offer high precision and high resolution measurements which, together with their ease of use, high reliability and convenient transport, as well as their reduced weight and small size, make them basic standards in an instrumentation workshop.

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  • Operating temperature: 0 to 50°C
  • In case of possible connection or manipulation errors, the measuring circuit is protected against short circuits and external voltages up to 30V.
  • Rechargeable batteries with long autonomy.


  • Measurement/Generation with a single tool
  • High accuracy
  • High resolution


  • Thermocouple measurement and simulation
  • Calibration of thermocouple transmitters
  • Testing of temperature control loops

Technical specifications

Common technical features in the Tinycal series
Operating temperature 0 to 50 ºC
Temperature coefficient 0,003 % /ºC
Baterías recargables NiMH, autonomy 14 h
Execution time 16 hours
Battery charger power supply 230 V 50 Hz
Display LCD, 4 ½ digits, height 10 mm , with blue LED backlighting
Dimensions 83 x 152 x 33 mm
Weight 240 to 300 gr.
Warranty 2 years, possible extension to 5 years
Technical characteristics T254
Generation/simulation Manual or automatic
Time of passage Programmable from 1 to 30 seconds
Label EC
Tinycal T254 Thermocouple Calibrator
TCS beacon supported B, E, J, K, N, R, S
Simulation range 2 years 80 to 390 Ohms (-50 to 850ºC) (simulation current is 0.1 to 2Ma)

-10 to 85 mV (Resolution 0.001/0.01 mV)

Cold junction compensation (CJ) 0 to 50ºC, +- 0,5ºC
Accuracy at 23ºC +- 3ºC +- 0,025% FS
Uncertainty 1 year +- 0,05% FS
Measuring range 2 years 20 to 320 Ohms (-220 to 600ºC) (applied current 1Ma approx.)

-10 to 85 mV (Resolution 0.001/0.01 mV)

Input impedance >10 M Ω
Accuracy at 23ºC +- 3ºC +- 0,025% FS
Uncertainty 1 year +- 0,05% FS
Temperature indication ºC or ºF
Resolution 0.01 mV and 0.1 ⁰C
Function Measurement and generation/simulation

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