<12. Troubleshooting>
12-6
IM 11M12G01-02EN 1sh Edition : Mar. 25, 2021-00
301 Battery low alarm The internal battery is low.
Turning OFF Power Supply when the battery is exhausted
will reset the clock.
319 Fast warm-up function alarm The function to shorten the warm-up time when an
instantaneous power failure occurs does not work.
alarm is cancelled when the cause of the alarm is removed. However, Alarm 205 to 208 may be
generated concurrently with Alarm 017 (Fault: heater temperature error). In this case, the remedy
when the error occurs has priority.
restarted before the cause of the alarm has been removed, the alarm will be generated again.
However, Alarms 120, 201 to 204 (alarms related to calibration) are not generated unless
calibration is executed.
12.2.2 Remedies When Alarms are Generated
(1) Alarm 101 to Alarm 116: Oxygen concentration alarm, Humidity alarm, Mixing ratio
alarm, Relative humidity alarm
This alarm is generated when the set alarm value is exceeded or falls below. For details on these
alarms, see Section
“8.4 Alarm Setting”, in the chapter on operation.
(2) Alarm 117: Simple cell resistance alarm
The result of the simple cell resistance measurement has exceeded setup alarm value. For a
setup alarm setting.
(3) Alarms 118 and 119: AO1 saturation, AO2 saturation
The analog output has reached the upper or lower limit. Check set value, and process-
measurements.
(4) Alarms 120: Calibration stability alarm
This alarm occurs when electromotive force of the sensor (cell) does not stabilize after calibration
gas, span gas).
<Cause of occurrence>
• The length or thickness of the calibration gas tubing has been changed (lengthened or
thickened).
• The response of the sensor (cell) deteriorated.
<Searching for the cause of the error and remedy>
(2) When calibration is performed normally, perform steady operation as it is.
If the alarm recurs, check the following before replacing the sensor assembly.
• The tip of sensor probe is markedly contaminated with dust, etc. If it is, clean it (see section
“11.1.2 Cleaning the Calibration Gas Tube”). If an alarm also occurs in calibration after
by repositioning sensor.
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