Riken Keiki GD-F4A-SC-A, Operating Manual

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[OPERATING PRECAUTIONS]
This is a fixed type gas detector (head) and alarm instrument to detect oxygen gas in air. The
gas alarm instrument is a safety instrument, not an analyzer nor measuring instrument to make
quantitative and qualitative analysis or measurement.
Please understand following points and use this detector head correctly.
1. The indication on this detector has some changes against fluctuation of atmospheric
pressure. Especially, take care about alarm action at the time of depression caused by
typhoon.
It may also fluctuate against the environmental (temperature, humidity, etc.) change around
detector head.
2. Alarm level for gas alarm instrument shall be set within the performance of the instrument.
Our standard alarm level is 18% by volume for the prevention of oxygen deficiency.
3. This is not control equipment, but a safety instrument.
Use the alarm contact from gas alarm instrument only for external alarm light or buzzer.
And the analog output signal shall be used only for external indicator or recorder.
We do not assume liability for any accident or damage caused by other control purpose than
the above.
4. To maintain the performance of this gas detector, the regular maintenance service including
the regular parts replacement and adjustment described in this manual shall be required.
Also every 6 months regular maintenance and gas calibration are required since this is a
safety instrument.