LUDLUM 44-7, Техническое руководство

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Model 44-7 Technical Manual
Page 3 July 2012
OPERATING PROCEDURES
CONNECTING DETECTOR TO INSTRUMENT
Connect one end of the cable provided to the detector by firmly
pushing the connectors together while twisting clockwise a quarter of a
turn until it latches. Repeat the process in the same manner with the
other end of the cable and the instrument.
TESTING THE DETECTOR
1. Ensure that the instrument HV is at the proper setting for the
detector.
2. Connect the detector to the instrument and check for a proper
background reading (typically 25 to 50 cpm at a background level of
8 to15
µ
R/hr.
3. Expose the detector to a check source and verify that the
instrument indicates within 20% of the check source reading
obtained during the last calibration. Alternatively, expose the
detector to a check source of a known value and verify that the
detector gets greater than or equal to the efficiency listed in the
specification section of this manual.
4. Instruments that meet these criteria are ready for use. Failure to
meet these criteria may indicate a malfunction in the detector.