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MODEL 2224-1 Technical Manual
Section 8
Ludlum Measurements, Inc. Page 8-1 January 2012
Troubleshooting
ccasionally you may encounter problems with your LMI
instrument or detector that may be repaired or resolved in the
field, saving turn-around time and expense in returning the
instrument to us for repair. Toward that end, LMI electronics
technicians offer the following tips for troubleshooting the most common
problems. Where several steps are given, perform them in order until the
problem is corrected. Keep in mind that the most common problems
encountered with this particular instrument are: (1) detector cables, (2) sticky
meters, (3) battery contacts.
Note that the first troubleshooting tip is for determining whether the
problem is with the electronics or with the detector. A Ludlum Model 500
Pulser can be invaluable at this point because of its ability to simultaneously
check high voltage, input sensitivity or threshold, and the electronics for
proper counting.
We hope these tips will prove to be helpful. As always, please call if you
encounter difficulty in resolving a problem, or if you have any questions.
Troubleshooting Electronics that utilize
Proportional and Scintillator Type Detectors
SYMPTOM
No power (or meter
does not reach
BAT
TEST
or
BAT OK
mark)
POSSIBLE SOLUTION
1. Check batteries and replace if weak.
2. Check polarity (see marks inside
battery lid). Are the batteries installed
backwards?
Section
8
O