Riken Keiki GD-3EC, Technical Manual

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2. Important Safety Information 2-1 Danger information
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2
Important Safety
Information
2-1 Danger information
DANGER

Do not open the cover while the power is turned on. When opening the cover, use a portable gas
detector or other similar device to confirm that there is no gas present in the vicinity.

Do not attempt to repair the product.

Do not attempt to repair or replace the explosion-proof bonding surface. If you observe scratches, cracks,
or deformation on the housing or explosion-proof bonding surface, stop using the product immediately
and contact Riken Keiki promptly.
2-2 Warning information
WARNING

Before turning on the power for the product, be sure to confirm that the power source meets the specified
voltage requirements.
Using power supplies other than the stipulated voltage will damage the product. Do not use unstable
power supplies. Doing so may result in malfunctions.

Do not disconnect the protective grounding wire or terminal.

Before operating the product, check the protective functions for defects.
Do not operate the product if you suspect any problems with the protective grounding or other protective
functions.

Connect to a protective ground before connecting to external control circuits.

Before adjusting zero for the surrounding atmosphere, confirm that the surrounding atmosphere contains
clean air.
The presence of interference gases will prevent proper air calibration. The presence of miscellaneous
gases is also extremely dangerous because the product may not detect actual gas leaks correctly.

A gas alarm indicates the presence of extreme danger. The user must take appropriate action after taking
suitable steps to ensure safety.

Do not immerse the product in organic solvents for extended periods. The flame arrester components are
made of polyphenylene sulfide (PPS) resin.