Ametek 5000 Instrument Manual page 72

Troubleshooting Guide for 5000 Analyzer (continued)
Possible Cause
Analyzer Reads High
Incorrect flow rate
Incorrect back pressure
Incorrect operating parameters
Leaks in sample tubing
Low oven temperature
Moisture Generator Output Reading Incorrect
Incorrect flow rate or back pressure
Incorrect operating parameters
Incorrect calibration values entered
Dry moisture generator reservoir
Incorrect moisture generator tem-
perature
Faulty reservoir tubing bundle
Incorrect operating parameters
• Cell_Temp_Alert
Environmental Temp
Faulty electronic control amplifier
6-6
5000 Multi Point Moisture Analyzer
Isolation Procedure
Check flow rates, generator
temperature, and back pressure
setting.
Measure temperture of moisture
generator J2 pins 2 and 3 of field
unit board.
Calibration has exceeded Max_
Span and/or Max_Cal_Err limits.
Check for CR1 blinking.
Remove cell oven connector J1,
CR1 will go on short pins 1 and 4
together on the electronic control
amplifier PCB and CR1 will go off.
Corrective Action
Check and, if necessary, reset flow
rate.
Check and, if necessary, reset back
pressure.
Check all values against Calibra-
tion Data Sheet.
Correct leaks as necessary
Set oven temp to 60°C ±0.25°C.
Check and, if necessary, reset flow
rate or back pressure.
Check all values against Calibra-
tion Data Sheet.
Run display routine and check
all values against those listed on
Calibration Data Sheet. Re-enter
values if necessary. Recalculate
SPAN values.
If readings are ok, check and if
necessary, refill the reservoir.
Adjust R26 on field unit board as
neccessary to obtain 60°C
Replace generator.
Check all values against calibra-
tion data sheet.
Housing or ambient temperature is
too hot or too cold for the electron-
ic control amplifier to control Cell
temperature.
If not, replace electronic control
amplifier PCB.