2 Important Notices on Safety
2-3. Precautions
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2-3. Precautions
2-4. Operating precautions
This detector is a gas detector that detects combustible and toxic gases in the air and outputs gas
concentration signals.
The gas detector is a safety unit, not an analyzer or densitometer which performs quantitative/qualitative
analysis/measurement for gases.
Please fully understand the following points before using it, so that it can be used properly.
1. The detector may be interfered by gases other than the gas to be detected, solvents, vapors etc.
Please note that the gas concentration signal may be fluctuated by interference. In addition, it may be
fluctuated by environmental (temperature, humidity, etc.) changes in the installation site.
2. The alarm must be set within a range where the performance of the detector can be ensured.
In facilities compliant with the High Pressure Gas Safety Act, an alarm setting below our standard
alarm setpoint (threshold limit value) may trigger a false alarm.
3. This is a safety unit, not a control unit.
Use the analog signal output of the detector for an indicator or external recorder.
If these outputs are used to control other units, we shall not be responsible for any malfunctions.
4. Because the contact point of the gas detector sensor is made of porous polymeric membrane, the
water repellency of the membrane is deteriorated by solvents, thus causing an electrolyte leak from its
inside. Do not use solvents near the detector.
If a solvent is used for unavoidable reasons, attach the recommended filter to the areas such as inlet of
the gas detector while using the solvent and for one hour after that.
5. For maintenance of the detector, it must go through a regular maintenance, including replacement and
adjustment of the regular replacement parts as specified in the operating manual.
In addition, because this is a safety unit, it is recommended that a regular maintenance and a
calibration are performed every six months in accordance with the regulations.
CAUTION
Do not use a transceiver near the detector.
Radio wave from a transceiver or other radio wave transmitting device near the detector or its
cables may disturb readings.
If a transceiver or other radio wave transmitting device is used, it must be used in a place where it
disturbs nothing.
To restart the detector, wait for five seconds or longer before switching on detector.
Restarting the detector within five seconds may cause errors.
Careful consideration should be given to instrumentation to maintain safety even when a trouble
like disconnection of power cable or unexpected malfunction or failure occurs.
This is an electrical appliance. Be careful that it may be affected, in rare cases, by power supply
noises, static electricity and electromagnetic noises. Before using the detector in an environment
with such noises, provide for protective measures against them.
