Riken Keiki GD-3EC, Техническое руководство

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9. Troubleshooting 9-2 Reading abnormalities
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Symptom/display
FAULT
lamp
Cause Action
Cable abnormality
between the main unit
(SD-3SC) and remote
sensor head (GD-3) Check the cable between the main unit (SD-3SC)
and remote sensor head (GD-3).
Sensor
abnormality
(E-1)
(lit)
A main unit (SD-3/
SD-3SC) or remote sensor
head (GD-3) fuse has
blown. Replacement required. Contact Riken Keiki.
Main unit (SD-3/SD-3SC)
or remote sensor head
(GD-3) internal circuit
abnormality Replacement required. Contact Riken Keiki.
System
abnormality
(E-9)
(lit)
4 - 20 mA output
disconnection Turn off the power and check the 4 - 20 mA
output connection.
Internal ROM, RAM, or
EEPROM fault Turn off the power and restart. If the problem
persists, replacement is necessary. Contact
Riken Keiki.
GD-3 abnormality
(E-1A)
(lit)
The sensor is not
connected or connected
improperly. Turn off the power and check the sensor
connection.
A sensor fault has
occurred. Replace with a new sensor.
Effects of sudden surge
noise Turn off the power and restart. If similar
symptoms recur frequently, take appropriate
measures to address the noise source.
If the problem persists even with noise prevention
measures, contact Riken Keiki.
9-2 Reading abnormalities
Symptom/display
FAULT
lamp
Cause Action
・
The reading
rises (or drops)
and remains
unchanged.
・
A gas alarm is
triggered
despite the
absence of a
gas leak or any
other
abnormalities at
the detection
area.
・ Response is
slow.
―
The sensor zero or
span has altered
(drifted). Perform zero calibration or span adjustment.
Presence of interference
gases Check for the presence of interference gases
such as solvents and take appropriate action.
Slow leakage Trace amounts of detection target gas may be
leaking. Leaving this unresolved may lead to
hazardous conditions. Take the same action
as for gas alarms.
Environmental
fluctuations Perform zero calibration or span adjustment.
Effects of noise Turn off the power and restart. If similar
symptoms recur frequently, take appropriate
measures to address the noise source.
If the problem persists even with noise
prevention measures, contact Riken Keiki.