Riken Keiki SD-D58-AC-GH, Руководство по эксплуатации

Страница: 68 / 82

SD-D58 Series
64
<Abnormalities of Readings>
Symptoms Causes Actions
The reading rises (drops)
and it remains so.
Drifting of sensor
output
Perform the 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 the zero adjustment (AIR 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 head.
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 head cannot adjust to it and is
affected by it. In some cases, the detector head triggers
an indication alarm.
Because the detector head cannot be used under
sudden and frequent environmental changes, you must
take any preventive actions to eliminate them.
Slow response
Deteriorated sensor
sensitivity
Replace the sensor with a new one.
Span adjustment
impossible
Improper calibration
gas concentration
Use the proper calibration gas.
Sensor sensitivity
deterioration
Replace the sensor with a new one.