Additel 221A Multifunction Temperature Calibrator User Manual User Manual
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0.6mA).For (1Ω to 400Ω) range, 1mA driving current is recommended, and for (400Ω to 4000Ω) range, 0.1mA
driving current is recommended.
(5) Frequency, pulse source: Source square wave with (50±10)% duty cycle, amplitude range 2V to 12V, amplitude
accuracy 3%FS.
(6) Loop 24V DC power: The maximum load current is 50mA, ripple <50mV.
(7) Simulating thermocouple, RTD source: To be decided by the accuracy of mV source and resistance source,
according to the 90 international temperature scale.
(8) All ports are short circuit protected.
(9) The maximum overvoltage of all the sourcing ports is ±30VDC (less than 1 minute duration); the calibrator will be
damaged when this range is exceeded.