T220 – Current loop calibrator 0-20/4-20mA


The T220 is a technical evolution from the SIM 420 current calibrator manufactured by Gometrics and endorsed by over 25 years of experience.  It is an excellent tool to perform the verification of 0-20mA process current loops.

All Tinycal series instruments are dual function: generation/simulation and measurement. Keys on the instrument’s front panel enable configuration for generation of set values in either engineering units or percentages. Panel keys also enable generation in steps that can be timed for 1 to 9 seconds per step, which it memorizes thanks to its 6 configuration keys. Simulation from the instrument —T240 and T250— can be configurated to simulate the sensor response (Pt100 or type of thermocouple selected).

The measurement function is easily selectable with the IN/OUT button, as clearly indicated on the display, which indicates the value to be measured. To prevent possible connection or manipulation errors, the measurement circuit is protected againstshort-circuits and external voltage up to 30 V, guaranteeing the instrument longer service life. The T220 and T225 models of Tinycal family are equiped with an integrated 24-V dc sypply, enabling power supply to the loop from the calibrator (active mode), or volontarily in passive mode.

All the instruments of 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 reduced weight and small size, make them basic standards in an instrumentation workshop.

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  • In anticipation of possible connection or manipulation errors, the measuring circuit is protected against short-circuit and external tensions until 30V
  • Rechargeable batteries with great autonomy


  • Measurement/Generation with one unique tool
  • Great precision
  • High resolution


  • Calibration of transmitters 4-20 mA and 0-10V, Pt100 probes, TC and pH
  • Measurement and generation/simulation

Technical specifications

Technical features common in the Tinycal series
Operational temperature 0 to 50 ºC
Temperature coefficient 0,003% /ºC
Power supply to loop 24 Vcc (models T220 / T225)
Rechargeable batteries NiMH
Runtime 16 hours
Power supply to batteries charger 230 V 50 Hz
Display LCD, 41/2 digits, 10 mm high
Dimensions 83 x 152 x 33 mm
Weight 240 to 300 gr.
Generation Manual or automatic
Step time Programmable between 1 and 9 seconds
Label EC
Warranty 2 years


4-20 mA

Range 0-24 mA
Input impedance 10 Ω
Accuracy at 23ºC ± 3ºC ± 0,015% FS
Uncertainty 1 year ± 0,025% FS
Resolution 0,001/0,01 mA
Function Active or passive measurement and generation selectable by connection
Runtime 150 hr measuring; 11 hr generating 20 mA with internal supply

  • Product configuration and extras

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