Gap Reference Calibration

You must compensate for DC gap offset when you compute the centerline plot of shafts. This compensation requires another type of reference signal, called DC gap reference. The DC gap reference contains the DC values of the probe when the shaft is at rest.

Complete the following steps to perform shaft centerline position compensation.

  1. Measure the DC gap voltage values of the proximity probes when the shaft is at rest.
  2. Subtract the at-rest DC gap voltage values from the DC voltages measured during normal operation and combine the results to form the shaft centerline plot.