8 Troubleshooting
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8
Troubleshooting
The Troubleshooting does not explain the causes of all the malfunctions which occur on the detector. This
simply helps to find the causes of malfunctions which frequently occur. If the detector shows a symptom
which is not explained in this manual, or still has malfunctions even though remedial actions are taken,
please contact RIKEN KEIKI.
<Abnormalities of Readings>
* Take remedial actions to indicator/alarm unit as well See the operating manual of the indicator/alarm
unit for details.
Symptoms Causes
Actions
The reading rises
(drops) and it remains
so.
Drifting of sensor
output
Perform zero adjustment.
Presence of
interference gas
Disturbances by interference gases, such as solvents,
cannot be eliminated completely. For information on
actions, such as removal filter, please contact RIKEN
KEIKI.
Slow leak
A very small amount of the gas to be detected may be
leaking (slow leak). Because ignoring it may cause
dangers, take a remedial measure, i.e., taking actions
the same as those for the gas alarm.
Environmental
changes
Perform zero adjustment.
A gas alarm is triggered
despite of no gas leak
and no other
abnormalities at the
detection point.
Presence of
interference gas
Disturbances by interference gases, such as solvents,
cannot be eliminated completely. For information on
actions, such as removal filter, please contact RIKEN
KEIKI.
Disturbance by noise
Turn off and restart the detector.
If such a symptom is observed frequently, take
appropriate measures to eliminate the noise.
Sudden change in
the environment
When the environment (temperature, etc.) changes
suddenly, the detector cannot adjust to it and is affected
by it.
In some cases, the detector triggers an indication alarm.
Because the detector cannot be used under sudden and
frequent environmental changes, any preventive actions
to eliminate them should be taken by the user.
Slow response
Deteriorated sensor
sensitivity
Replace the sensor with a new one.
Span adjustment
impossible
Improper calibration
gas concentration
Use the proper calibration gas.
Deteriorated sensor
sensitivity
Replace the sensor with a new one.
