NGD7201 Manual 052808 FINAL - General Tools And Instruments
Contents
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4. ed to stabilize the sensor before usage Turn on the meter occasionally to make the accumulative warm up time shorter 4 Regardless of the powering condition if the sensor is exposed to extreme conditions such as very high humidity extreme temperatures or high contamination levels for a long period of time the sensor performance will be adversely affected
5. n you turn the meter off for a short time and turn it back on again it always needs 60 seconds to warm up 3 Mute function The meter beeps every one second to ensure the meter is in normal working status The beep frequency will speed up as the detected gas concentration becomes higher When the user uses the earphone the meter will automatically mute but the user can hear the beeping through the earphone When the user is not using the earphone the user can mute the beeping by switching the mute to the ON position 4 Leakage Checking Move the sensor toward the pipe slowly sliding the sensor along the pipe Repeat the procedure on the other side of the pipe When the sensor is near a leak the LED will light up and the beep frequency will increase lt takes at least 2 minutes of waiting for the sensor to recover after removing the sensor from the leak point BATTERY REPLACEMENT When the battery LOW LED is on it is suggested to change the batteries to ensure the units accuracy Open the battery compartment of the meter on the rear side and replace with 4 AA batteries TROUBLESHOOTING Meter does not turn on a Make sure the time of pressing the ON OFF key is more than 200 mS b Check that the batteries are in place with good contact and correct polarity c Replace with a new battery and try again Ready LED isn t on after 60 seconds warm up a Check that the sensor is making
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