4 How to Use
4-4. How to detect
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GP-1000
4-4. How to detect
<Reading Display>
When the preparation for start-up and air calibration have been completed, put the probe close to the
detection area in the detection mode and perform gas detection.
Reading display (example)
CH4 concentration : 0.0% LEL
Detection range: 0-10.0% LEL (Low RANGE)
Range mode: Automatic switching (Auto)
Battery level: Low
Time: 18 minutes past eight in the evening
DANGER
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 blow out from the gas exhausting outlet. Never inhale
the air or gases.
High-concentration (more than LEL) gases may blow out. Never use fire near the gas detector.
WARNING
The gas detector is designed to draw gases around it under the atmospheric pressure. If
excessive pressure is applied to the gas inlet and outlet (GAS IN, GAS OUT) of the gas
detector, detected gases may leak out from its inside and may cause dangerous conditions. Be
sure that excessive pressure is not applied to the gas detector while used.
Do not connect the sampling hose directly to a location with a pressure higher than the
atmospheric pressure. The internal piping system may be damaged.
When the fresh air adjustment is performed in the atmosphere, check the atmosphere for
freshness before beginning the adjustment. If other gases exist, the adjustment cannot be
performed properly, thus leading to dangers when the gas leaks.
Issuance of a gas alarm indicates that there are extreme dangers. Take proper actions based
on your judgment.
Before use, check that there remains sufficient battery power. When the gas detector is not
used for a long period, the batteries may be exhausted. Replace them with new ones before
use.
If a low battery alarm occurs, gas detection cannot be conducted. If the alarm is triggered
during use, turn off the power and promptly replace the batteries in a non-hazardous area.
Do not block the buzzer sound opening. No alarm sound can be heard.