I used a power meter to measure the power consumption of a Gamma ion pump controller (Digitel MPCq type) to power the 1200 l/s ion pumps (this one located at Y2-8), I concentrated on startup of the controller, then on startup of the high voltage (7kV) for the ion pump..

During the initial startup of the ion pump controller the consumption goes up slow, it creeps up to 12.04 Watts max, then it drops a bit after.  The second part of the test was to see the consumption spike when turning on the high voltage for the ion pump, for this test the meter immediately goes up to 40.69 Watts, then after a few seconds the power drops slowly.

A side effect of running this test can be appreciated on the attached trend data, because we powered off the ion pump the vacuum pressure internal to the main volume went up, it can be appreciated by the gauges along the Y-End station as well as Y2-8 gauge.

To do the test I powered the unit off and back on 3 times.