Model 19 MICRO R METER Technical Manual Section 4
Ludlum Measurements, Inc. Page 4-2 February 2012
HV Adjustment: provides a means to vary the high voltage from 400 to
1500 V.
Range Calibration Adjustments: recessed potentiometers located under
the calibration cover on the right side of the front panel. These
adjustment controls allow individual calibration for each range
multiplier.