Abstract
There is a solution proposed in this paper to reject common mode noise (caused by potential difference between a sensor and a measurement channel) in measurement channels. Its main idea is to provide power supply of measuring subsystem using either an accumulator or a capacitor, which is periodically charged from the electric network by switching on and off contacts of corresponding relay. During this procedure, a switchboard turns off the sensors from inputs of an analog part of the measuring subsystem. The control device must provide separate connection of the switchboard and charging relay.
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