LUDLUM 2360, Руководство пользователя

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Model 2360 Technical Manual
Section 2
Ludlum Measurements, Inc. Page 2-3 July 2016
Turn the range selector switch from the off position to the ×1000 position
and verify that the meter needle is driven full-scale for approximately two
seconds and then returns to zero. Also ensure both alarm LEDs on the
front panel turn on briefly. The LCD should go through an initialization
sequence displaying
˝
88:8.8:8.8,
˝
then the current sample number, and finally
“0.”
Operating the Instrument
Connect a detector to the instrument if you have not already done so.
Obtain a meter reading from a check source or calibrated source, if available.
Verify that the reading falls within the expected range. Remove the source.
If a radiation source is available, increase the meter count to exceed the
alarm threshold. Both the appropriate alarm lamp and audio alarm signal
should activate.
Depress the
RESET
toggle switch. The meter needle should drive to zero and
the alarm circuit should de-energize, shutting off both visual and audible
alarms.
Proceed with use.
Principle of Operation
The Model 2360 is to be used in combination with an alpha/beta
scintillation or proportional detector. The pulse height differential between
the alpha and beta pulses from the scintillation or proportional detector is
discriminated by the Model 2360.
The detected alpha count is displayed by selecting the “ α ” position on the
three-position “ α / α + β / β ” toggle switch. Likewise, the sum of the alpha and
beta counts or the beta counts only are displayed by selecting the appropriate
“
α + β ” or “ β ” position. Multiply the cpm reading on the analog ratemeter
by the range multiplier position. When using the LCD and preset count time
interval, the counts are accumulated in each of the three channels during the
count cycle. The count cycle is started by depressing the push-button located
in the end of the carrying handle. If a scaler or ratemeter alarm is activated,
the
ALARM
LED will light and the audio will sound a steady tone.
The
RESET
toggle switch position resets the meter pointer to zero and
deactivates any current alarm. The detector operating voltage is displayed on