4. How to Install Gas Monitor
4-2. Precautions for system designing
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<Do not install the monitor in a place exposed to direct sunlight
or sudden changes in the temperature.>
Avoid a place where the monitor is exposed to direct sunlight or radiant heat
(infrared rays emitted from a high-temperature object), and where the unit
temperature changes suddenly. Condensation may be formed inside the
monitor, or the monitor cannot adjust to sudden changes in the temperature.
<Keep the monitor (and its cables) away from noise source
devices.>
When selecting installation points, avoid a place where
high-frequency/high-voltage devices exist.
<Do not install the monitor in a place where maintenance of the monitor cannot
be performed or where handling the monitor involves dangers.>
Regular maintenance of the monitor must be performed.
Do not install the monitor in a place where the machinery must be stopped when maintenance is
performed in its inside, where parts of the machinery must be removed to perform maintenance, or
where the monitor cannot be removed because racks or other things prevent access to it. Do not
install the monitor in a place where maintenance involves dangers, for example, near a high-voltage
cable.
4-2. Precautions for system designing
Note the following precautions for system designing of the monitor.
Using a stable power supply
The external output and alarm contact of the monitor may be activated when the power is turned on, when
momentary blackout occurs, or when the system is being stabilized. In such cases, use a UPS
(uninterruptible power system), or take appropriate actions on the receiving side.
The monitor must be provided with the following power supply.
Power supply
voltage
100 VAC ±10% (50/60 Hz), 24 VDC±10%
Allowed time of
momentary
blackout
Up to 10 milliseconds
(To recover from the momentary blackout for 10 milliseconds or more, restart the
monitor.)
Example of actions
To ensure continuous operation and activation, install a UPS (uninterruptible
power system), etc. outside the monitor.
Others
Do not use it with a power supply of large power load or high-frequency noise.
Example of actions
Use a line filter, etc. to avoid the noise source if necessary.
CAUTION
An unstable power supply and noise may cause malfunctions or false alarms.
