Stanford Research Systems SIM922 Overview

The SIM922 Diode Temperature Monitor is designed to measure four sensors simultaneously. Based on the modular SIM platform, it provides high-performance and multiple-channel capability in a small footprint. Each of the four channels in the SIM922 has an independent, precision 10 A current source to provide sensor excitation. Measurement results can be displayed in either kelvin or volts. The SIM922 employs four-wire measurement circuits (ToneI excitation leads, V sense leads) making the measurements insensitive to series lead resistance. The four channel excitations are independently controlled and do not switch on or off when the readout is advancing between channels. Sensor excitations can be disabled to reduce power dissipation at sensitive cryogenic stages. Measurements are performed at rates up to four readings per second. In addition, each channel has non-volatile memory to store a 256-point custom calibration curve to convert sensor units (V or ) to temperature units (K).

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