Riken Keiki GD-84D-EX Series, Operating Manual

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2. Important Safety Information 2-3 Caution information
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Operating in an environment with gases

Do not operate this product in locations where combustible or explosive gases or vapor are present.
Operating this product in such environments is extremely hazardous.
Action when a gas alarm occurs

A gas alarm indicates the presence of extreme danger. The user must take appropriate action after
taking appropriate steps to ensure safety.

Depending on the type of gas detected, the sensor characteristics may be severely degraded. If the
gas alarm is triggered, we recommend performing maintenance on all sensors fitted to this product
to check their gas sensitivity.
2-3 Caution information
CAUTION
Do not use walkie-talkies near the product.

Radio waves from walkie-talkies or other radio transmitting devices near the product or cables may
affect readings. Use walkie-talkies or similar devices only in locations where they will not affect
product functions.
Wait at least five seconds after turning off the power before turning the power back on.

The product may not function correctly if the power is turned on again within five seconds.
Confirm that the flow display is the stipulated flow before using the product.

If the flow display is not the stipulated flow, gas will not be detected properly. Check whether the
flow is unstable or absent.
Attach a dust filter.

Attach the specified filters when using this product to avoid the effects of gas absorption and
airborne dust.
The correct dust filter type depends on the type of gas to be detected. Contact our sales department
for more information.
Observe the specified operating range to avoid condensation in the pipes.

Condensation within the pipes may lead to gas adsorption, blockages, and other problems that
make it impossible to detect gases accurately. To prevent condensation within the pipes, carefully
monitor temperature and humidity both at the sampling point and within the general environment.
When detecting gases that become more corrosive when dissolved in water (e.g., highly acidic
gases), note that consequences may include impaired capacity to detect gases and corrosive
damage to internal parts.
Do not use external output from the product to control other devices.

The product is not a control device. Never attempt to use the external output of the product to
control other devices.
Do not disassemble or modify the product or alter the settings unless absolutely necessary.

Product performance cannot be guaranteed if the product is disassembled or modified. Additionally,
altering the settings unnecessarily without a proper understanding of the details may prevent the
alarm from operating correctly.
Read this operating manual carefully to ensure correct use of the product.
Be sure to perform regular maintenance.

The product is a safety device. Maintain the product periodically to ensure safety. Continuing to use
the product without adequate maintenance will result in sensor sensitivity variations, preventing
accurate gas detection.