Process(mV/mA) /Temperature calibrator Temperature functions , Thermocouples K/J/S/N/T and RTD Pt100 mV (0-199.9mV), current (0.00 to19.99mA) Display 3 ½ Digit , Range available -1999 to1999 Adopt ITS 90 Temperature Scale Used 4 digit 7 segment LED display Good accuracy 0.25 %, AC Power operated RTC for Thermocouple Calibration AC mains operated 230VAC or 110VAC optional