Model 44-157, 44-159, 44-159-1, 44-162
Gamma Pipe Monitors
Ludlum Measurements, Inc.
Page 5
September 2016
Operating Procedures
C
ONNECTING TO AN
I
NSTRUMENT
Connect one end of the cable provided to the
detector by firmly pushing the connector
together while twisting clockwise one quarter
of a turn until latched. Repeat the process in
the same manner with the other end of the
cable and the instrument.
T
ESTING THE
D
ETECTOR
1.
Ensure the instrument high voltage (HV) is at the proper
setting for the detector.
2.
Connect the detector to the instrument and check for a
proper background.
3.
Expose the detector to a check source and verify that the
instrument indicates within 20% of the check source
reading from the last calibration. Alternatively, expose the
detector to a source of known value and verify that the
detector detects greater than or equal to the efficiency
listed in the specification section of this manual.
4.
Instruments and detectors that meet these criteria are
ready for use. Failure to meet these criteria may indicate a
malfunction in the detector.
