The level switch operation checker is designed as an auxiliary calibrator to inspect and set the sensitivity of the NQH and NSH models. When materials to be measured are powder of low apparent dielectric constant, sensitivity checking and operation checking become easier.
In principle, a change in static capacity obtained from the actual material to be measured is replaced into mimic capacity by mimic capacity method. The capacity slightly larger than the standard value thus obtained and the capacity slightly smaller than it are established. Then the larger value is made as ON-action gauge and the smaller value a the OFF-action gauge. Assessment is made by accepting the setting within the range of these two values and rejecting the setting out of the range of these two values.