Operation - geo-FENNEL FDG 1 Bedienungsanleitung

OPERATION

Note
Switch on detector in atmosphere free of gas only!
Switch on the instrument by sliding the ON/OFF button to the right -
in fresh air. The sensitivity control should be set to minimum. The green
LED (Ready) will light and the alarm will sound. After switching on the
detector for the first time the instrument will run through a warm-up
and calibration period for about 60 seconds. During this period the
alarm will not show any gas leak but this sound belongs to the calib-
ration period.
Check of function
Each time the detector is used you should first run a quick check of
function: Turn the sensitivity button of the instrument to minimum and
expose the sensor to a gas source, i. e. a lighter. Now the alarm should
sound.
Optimum conditions
Optimum measuring results will be achieved under following conditions:
Temperature
Air humidity
Detection of gas leak
Switch on instrument and turn the sensitivity button from minimum
to maximum until a slowly ticking sound starts (adjustment of
sensitivity).
Now move the detecor towards the leak suspected. If the instrument
detects a higher gas concentration the frequency of the alarm sound
will increase. The alarm LED starts lighting and with increasing gas
concentration the alarm sound will become louder.
13
0°C up to 50°C
10 up to 90 %RH