Troubleshooting - Ametek 5000 Instrument Manual

Troubleshooting

Possible Cause
Field Unit LEDs Do Not Light
Blown fuse F1
Blown thermal cutoff S2
Faulty power supply
Faulty connections
Controller Alarms Not Operating
Incorrect operating parameters
Faulty relay
Faulty cpu board
Display reads low in calibrate or operate modes
Incorrect operating parameters
Incorrect back pressure
Incorrect sample flow rate
Incorrect operating temperatures
Contaminated sample cell crystal
Contaminated dryer
Troubleshooting Guide for 5000 Analyzer
Isolation Procedure
Check for 24 V dc between red
and black test points TP2 (+) and
TP1.
Perform Test Alarm Relays routine,
page 5-3
Check flow rate with Bubble-O-
Meter.
Read cell frequency.
Substitute with known good
Corrective Action
Replace F1.
Replace S2.
If voltage is not present and CB1 is
closed, check power supply of T1
and diodes CR4 and CR5.
Check and secure all connectors
between boards. Check that all
relays are secure. Verify software
parameters.
If relay works, place analyzer on
line. If relay does not function,
replace the cpu board.
Replace the cpu board.
Check all values against Calibra-
tion Data Sheet.
Check and, if necessary, reset back
pressure.
Reset flow rate if necessary.
Check and, if necessary, set oven
and moisture generator operating
temperatures.
If cell frequency input is >3500
Hz, replace the cell.
Replace or re-activate dryer.
Troubleshooting and Maintenance 6-5