Channel selector for optimization of test and callibration procedures of ICTM pressure sensors

Abstract

This paper presents channel selector developed for improvement of the efficiency of the test and callibration procedure of ICTM pressure sensors. So far, this procedure allowed testing of only one sensor at the time. The channel selector enables simultaneous testing of up to five pressure sensors. This implies many benefits, such as: reduction of power consumption, reduction of the amount of gas used in the measurement system, significant saving of time needed for testing of a small series of pressure transmitters. Realization of the channel selector is based on use of a reed relay which is driven by specially designed electronics. There are two modes of operation of this device. The first one is by manual channel selection, while the second one is based on PC control realized by using dedicated software and microcontroller which are incorporated in the device itself and connected via USB communication. During the test and callibration procedure pressure is generated by MENSOR APC-600 pressure calibrator, while temperature is controlled using temperature test chamber HERAEUS VÖTSCH VMT 08/140.