Model 3030 & 3030E Series Technical Manual Section 6
Ludlum Measurements, Inc. Page 15 November 2017
Remove the outside cover of the Model 3030. Measure battery
voltage and ensure voltage is 13 volts or greater.
Connect the Model 3030 to the computer and load the default
settings. Make sure that the jumper on the amplifier/processor
board is on the inside two (2) pins. Ensure that both dipswitches are
in the ON position.
Connect the Model 500 Pulser to the Model 3030 with the
appropriate cable. (Computer may stay connected.)
Adjust the pulser for 400,000 cpm and adjust the pulse amplitude to
4 mV (negative amplitude).
Adjust the beta threshold (B-TH) and beta window (B-WN) for the
appropriate set points: B-TH at 4 mV and B-WN at 50 mV. The
pulser counts should be detected on the Model 3030 beta display
above 4 mV and should shut off above 50 mV.
Pulses in the beta channel should be audible. Ensure that the
VOLUME control works correctly.
Set the Model 500 Pulser amplitude switch to 200 mV. With the
Model 500 Pulser set to 120 mV, adjust the alpha threshold (A-TH)
control for 120 mV.
Pulses in the alpha channel should be audible.
Set the HV to 800 Vdc. Using a high-voltage meter, measure the high
voltage and adjust the HVL potentiometer on the amplifer/processor
board until the high voltage reads 800 Vdc ±2 Vdc.
Change the voltage (using the computer) to 500 Vdc and 1500 Vdc.
In each case, verify that the high voltage is within ±5% of the
correct value.
Change the shunt on the jumper (amplifier/processor board) to the
manual side (outside two [2] pins from the edge of the board).
Adjust the HVM potentiometer to manually adjust the high voltage to
800 Vdc. Place shunt back to the automatic side (inside two [2]
pins).
Set the LCD count time for 0.1 minute (6 seconds). Adjust the
pulser count rate to 400,000 cpm and pulse amplitude to 20 mV.
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