9. Troubleshooting
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<Abnormalities of Readings>
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 gas 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 gas detector cannot adjust to it and is
affected by it. In some cases, the gas detector
triggers an indication alarm.
Because the gas detector cannot be used under
sudden and frequent environmental changes, you
must take any preventive actions to eliminate them.
Slow response
Clogged dust filter
Replace the dust filter.
Bended or clogged
suction tube or
exhaust tube
Fix the defective parts.
Condensation is
formed inside the
suction tube.
Fix the defective parts.
Deteriorated sensor
sensitivity
Replace the sensor unit with a new one.
Span adjustment impossible Improper calibration
gas concentration
Use the proper calibration gas.
Deteriorated sensor
sensitivity
Replace the sensor unit with a new one.
