LUDLUM 3030, Руководство пользователя

Страница: 27 / 79

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.