Fluke Biomedical 06-912 - Manual (Page 10)

Nuclear Associates 06-912
Operators Manual
3-2
3.4 Troubleshooting
If the instrument does not appear to operate properly, one of the following may be the reason:
Abnormal Condition Probable Cause Corrective Action
A. Light weak or fails to go on
when charging contact is
depressed.
1. Weak battery.
2. Dirty (corroded) batter or
light
switch spring contacts.
3. Loose bulb.
4. Bulb burned out.
1. Replace battery.
2. Clean battery and light
switch contacts with steel wool
or equivalent.
3. Tighten bulb.
4. Replace bulb.
B. Hairline image moves fluidly
across scale but will not go to
zero.
1. Weak battery. 1. Replace battery.
C. Hairline image moves
erratically
across scale.
1. Dirt on contacts.
2. Leaf Spring out of
adjustment.
3. Faulty dosimeter. 1. Blow contacts with clean, dry
air.
2. Repair or replace charger.
3. Repair or replace dosimeter.
3.5 Special Problems
Old chargers occasionally get out of calibration due to repair and maintenance by inexperienced personnel. One
symptom is that the charger will no longer zero a low-range dosimeter properly, and this affects any calibration,
electrical leakage, or other test of the dosimeter requiring reading of the fiber position. This can be tested by
charging a low-range dosimeter, lifting it from the contact, observing the fiber position and then shorting the
contact pin with an electrical conductor. If the fiber moves, the charger is faulty and should be returned for repair
or replacement.