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Calibration Service
MicroSensor Company provides calibration services for all types of cryogenic temperature sensors in temperature range from 2.0 K to 325 K. MicroSensor calibrations are based on the International Temperature Scale of 1990 (ITS-90) using the iron-rhodium reference thermometers. The calibration process is computer controlled and calibration data collected automatically. The calibration facility provides stable and uniform temperatures (±0.005 K) during sensors calibration. The precise temperature for each data point is determined. Once temperature has stabilized, an appropriate DC excitation current is applied to the thermometer, and the resultant voltage is measured. For the resistance thermometers, the sensor excitation voltage is maintained between 5 mV and 15 mV (or/and 50 mV and 150 mV) in temperature range from 2.0 K to 325 K. Successive voltage readings taken with the current applied in opposite polarities are averaged together to eliminate thermal EMFs from the data. For the diode temperature sensors, the 10 microamps or/and 100 microamps DC excitation current are applied. Hart Scientific 9101 Zero Point Calibrator is used for production of zero-point dry-well (273.15 K, 0 °C, 32 °F) with stability of ±0.005 °C. NIST-traceable calibration. |