4 How to Use
4-1. Before using the detector
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4
How to Use
4-1. Before using the detector
Not only the first-time users but also the users who have already used the detector must follow the
operating precautions.
Ignoring the precautions may damage the detector, resulting in inaccurate gas detection.
The fixed combustible gas detector head GD-A80-70 is used in combination with an indicator/alarm unit that
indicates a gas concentration and triggers an alarm.
Once the detector detects a leak of combustible gas, it outputs a voltage according to the gas concentration.
The indicator/alarm unit indicates the gas concentration and triggers an alarm if a preset concentration level
is exceeded.
The detector may react to the gases other than the gases to be detected. When an alarm is triggered after
gas detection, check if the cause of the alarm is attributable to the gases to be detected or other gases.
As a precondition, a gas detector needs to be energized always and operating normally to fulfill the role of
detecting gases. To meet the precondition, it is important to check the daily operation status. For the check
of operation status, see "6-1. Maintenance intervals and items".
4-2. Precautions for installation sites
Do not install the detector in a place with vibrations or shocks.
The detector consists of sensitive electronic parts. The detector must be installed in a stable place without
vibrations or shocks and it cannot drop.
Do not install the detector in a place exposed to water, oil or chemicals.
When selecting installation points, avoid a place where the detector is exposed to water, oil or chemicals.
Do not install the detector in a place where the range of operating temperatures is exceeded.
The detector must be installed in a stable place where the operating temperature is maintained and do not
change suddenly.
For the operating temperature, see “9.Product Specifications”.
CAUTION
This is a precision device. Because the detector may not provide the specified performance in
some places (environments), check the environment in the installation point, and then take
appropriate actions if necessary.
Because the detector plays an important role for safety and disaster prevention, as many units
of the detector as needed must be installed in appropriate points.
Because points where gases leak and remain easily are different depending on the types of
gases and the working areas, please decide carefully on installation points and the number of
units to be installed.
