Model 3030 & 3030E Series Technical Manual Section 4
Ludlum Measurements, Inc. Page 10 November 2017
B-WN: a multi-turn potentiometer used to vary the upper beta pulse
discriminator from BT setting to AT setting, normally set at 50 mV
B-TH: a multi-turn potentiometer used to vary the lower beta pulse
discriminator from 2 to 15 mV, normally set at 4 mV
OL: a multi-turn potentiometer that provides a means to vary the detector
current overload set point
HVL: a multi-turn potentiometer used to calibrate the digital high voltage
HVM: a multi-turn potentiometer used to manually adjust the high voltage
when digital control is not desired
Internal Controls
The following dipswitches and jumpers are located on the
amplifier/processor board and are only accessible when the cover is
removed.
Dipswitch 1: When in the OFF position, the Model 3030 is locked into Scaler
mode only. The default position is ON.
Dipswitch 2: When in the ON position, the calibration date is disabled. The
default position is ON.
HV Jumper: When shunt is on the two outside pins, the HV is adjusted
manually with the HVM potentiometer. The normal shunt position is on the
two inside pins.
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