Inficon GAS-Mate Mode D'emploi page 6

Using the GAS-Mate
1. Be sure to power the GAS-Mate on in an area known to be free of any
combustible gases, such as outdoors, for ideal leak checking. Depress the
Power button to turn the unit on. Wait for the GAS-Mate to warm up. The high
pitched audible tone will change to a steady beeping and the LEDs will
illuminate briefly. The warm up time is approximately 30 seconds, but will vary
depending on the length of time since the unit was last used. In clean air, the
audio alarm will beep at a slow, steady rate.
The unit will automatically power up in maximum sensitivity. This is the setting
in which most leak-checking should be performed, including searching for very
small leaks. The GAS-Mate has adjustable sensitivity. You can reduce
sensitivity by dragging your finger downwards on the sensitivity touch pad.
This can be helpful for pinpointing the location of larger leaks. The automatic
background zeroing function keeps the instrument stable, eliminating the need
to frequently adjust sensitivity.
2. Carry the GAS-Mate into the area of the suspected leak. An alarm at this time
indicates a build-up of combustible gas in the general area. When the
GAS-Mate detects combustible gas, the rate of beeping of the audio alarm
increases in proportion to the size of the leak detected. The rate of flashing of
the LEDs also increases with an increase in the gas concentration detected.
The automatic background zero function (which is constantly working) will zero
out the background gas and the alarm will slowly return to a slow beeping.
When the unit has stabilized again, proceed towards the suspected leak site.
The GAS-Mate will continue to indicate changes in gas concentration by
alarming as the concentration increases.
3. Move the probe tip slowly (approximately 2-5 centimeters per second) around
suspected leak sites. Try to position the probe tip as close as possible to the
suspected leak site for optimum performance. An increase in the rate of
beeping and flashing LEDs indicates a leak.
4. To confirm a leak, pull the probe away from the suspected leak site and allow
the instrument to return to a steady state. Repeat step 3.
5. After exposure to very high concentrations of some gases, the sensor may
require several minutes to stabilize and return to normal operation.
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