Fluke Biomedical 945A - Manual (Page 71)

Section 7 - Troubleshooting
Troubleshooting
Both the Model 946A Digital Ratemeter and the Model 977-210 Preamplifier are microprocessor
controlled electronic decices. Complete troubleshooting of these devices requires specialized factory test
equipment. The following paragraphs identify field troubleshooting aids that may be performed in the
field.
WARNING
Extreme care must be used when troubleshooting a system that has
power applied. All standard troubleshooting precautions apply.
WARNING
Once a problem has been located, remove all power before continuing
with the repair.
CAUTION
Personnel performing the troubleshooting/repair must be qualified to
ANSI 45.2.6, 1978, Skill Level II.
Personnel performing the following procedure must be familiar with the
operation of the monitoring system and the location of each piece of
equipment used in the system.
NOTE
Improper set point entry can discontinue UDR operation. This includes
the alarm set point, underrange set point, overrange set point, analog
output low scale value, and analog output high scale value. (i.e., If the
HI alarm set point is entered above the overrange set point, the UDR
will display error Message E0002.)
If a problem cannot be resolved by using the drawings in the Appendix
while applying the troubleshooting instructions found in this manual,
or by performing the electronic adjustments in Section 6, please
contact the Fluke Biomedical RMS Customer Service Department at
(440) 248-9300 for assistance.
7-1