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2
2. Important Notices on
Safety
To maintain the performance and use the detector safely, observe the following instructions of DANGER,
WARNING, and CAUTION.
2-1. Danger cases
About use
• While conducting measurement in a manhole or confined space, do not lean over or look into
the manhole or closed space. It may lead to dangers because oxygen-deficient air or other
gases may blow out.
• Oxygen-deficient air or other gases may be discharged from the gas exhausting outlet of the
detector. Never inhale the air or gases.
• High-concentration (100% LEL or higher) gases may be discharged from the gas exhausting
outlet of the detector. Never use fire near it.