Fluke Biomedical 943-25 - Manual (Page 10)

Victoreen 943-25, 943-26
Operators Manual
2-2
2.3 Detector Operation - Replacement Parts
Turn on channel power at the readout and slowly increase the high voltage until a count rate of
approximately 100 cpm is achieved. This count rate assumes that the detector is in the open air and that
the discriminator threshold is set at 0.2 VDC in the readout. If the detector is placed within a lead shield,
the high voltage should be increased until a count rate of approximately 20 cpm is achieved. A two to four
hour warm-up is recommended prior to commencing calibration.