Wohler GS 220, Руководство пользователя

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GS 220
17
english
3. Measurement operation
1. Power ON/OFF
Press ON/OFF key more than 0.2 second to turn on the meter. While the meter is on
and electrical power is enough, the BAT. OK LED will stay on.
To ensure the accuracy, users must perform the warm-up period in the clean air.
The meter will be automatically switched off in 10 minutes. Or you could press
ON/OFF key again to turn off.
2. Warm-up Status
While the meter is power on but ready LED is off means the sensor is under warm-
up process. The warm-up time is approximately 60 seconds. While Ready LED is
on means the meter is ready to measure.
During this phase, a special compensating circuit automatically allows to limit the
effect of environmental change.
Even you turn off the meter for a short time and turn on again, it is always needed
to wait for 60 seconds warm-up time.
3. Mute function
The meter beeps every one second to assure the meter is in normal working status.
The beeps frequency will speed up while the detected gas concentration becomes
higher.
While user use earphone, the meter will automatically mute but user could hear the
beeper through earphone.
While not using earphone, user could mute the beeper by switching the mute to ON
position.
4. Leakage Checking
To check the pipe leakage proceed as follows:
Approaching the sensor to the pipe, slide slowly the sensor along the pipe; repeat
the procedure from the other side of the pipe. When the sensor is near to a leak,
the LED will light and beep frequency increased.
It takes at least 2 min. to wait for sensor recovering after removing the sensor out of
leak point.
3. Measurement operation