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TROUBLESHOOTING AND MAINTENANCE
System Alarms
The system alarm contacts are activated when a condition exists which makes the analyzer output ques-
tionable. The following error messages will be displayed on the bottom line of the analyzer display when
a system alarm condition exists:
CELL TEMP ALERT
LOW CELL FREQUENCY
HIGH CELL FREQUENCY
NEGATIVE DELTA FREQUENCY
ZERO ERROR
DISPLAY OVER-RANGED
MEMORY IS CORRUPTED
It is common for some of these system alarms to activate momentarily during normal operation, especially
during equilibration periods between measurement cycles. If system alarm persists, there may be a problem
with the measuring cell, the moisture generator, or the thermal controller. Please contact AMETEK service
at (800) 537-6044 if system alarm fails to shut off.
System Tests Menu
Numerous self test routines can be run periodically or used to assist in troubleshooting the instrument. Press
the
/
button and enter the level 1 or higher password. Scroll down to System Tests Menu and press
test
config
. Highlight a test from the following list; follow directions displayed on screen.
enter
NOTE
Activates when cell temperature deviates by more than 0.2°C from
setpoint (Temp_Set_Pt).
Activates when measured cell frequency is < 500 Hz.
Activates when measured cell frequency is > 3500 Hz.
Activates when delta frequency is < - 1 Hz.
Activates when the new calculated value of coefficient D (PolyCoeff_D)
exceeds the limits Max_Zero_Err or Max_Zero. Refer to Part III: Cell
Zero and Calibration for more information on these limits.
CAL ERROR
Activates when the new calculated span value (Moist_Span) exceeds
the limits Max_Cal_Err or Max_Span. Refer to Part III: Cell Zero
and Calibration for more information on these limits.
A displayed value exceed the allotted display area.
The RAM or RAM battery has failed causing factory default param-
eters to be loaded into memory.
Normal serial communications will be disabled while system tests are running.
Serial Communication 7-1
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