8 Troubleshooting
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<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 does not go
back.
Drifting of sensor
output
Perform air adjustment.
Presence of
interference gas
It is difficult to eliminate interference gases, such as
solvents completely. Please contact RIKEN KEIKI to
arrange removal filters.
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
It is difficult to eliminate interference gases, such as
solvents completely. Please contact RIKEN KEIKI to
arrange removal filters.
Disturbance by noise
Turn off and restart the alarm system.
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.
