13
5.2. STANDARD GAS CALIBRATION
Press
Key button
(
) under the fresh air calibration mode and the icon ( ) signifying standard
gas calibration will appear on the LCD monitor with the phrase CAL SPAN. Press for 3 seconds to
do the standard gas calibration and it will be completed automatically in 90 seconds. Press the
button during the calibration to stop. If you press the button upon the completion, It will return
to the initial standard gas calibration mode, and if you don't press the button, it automatically
enters the measure mode.
If the calibration fails, the phrase FA(Fail), not OK appears on the LCD. Press
the button to enter the initial fresh air calibration mode and if you do not press
the button, it changes into the measuring mode. If FA continues, please consult
WatchGas or the store you purchased as it may require the replacement of the
sensor or repair of the device.
DISPLAY FOR CALIBRATION COUNT
INITIAL STANDARD GASES CONCENTRATION FOR CALIBRATION
COMBUSTIBLE
OXYGEN
CARBON MONOXIDE
HYDROGEN SULFIDE
Concentration
50%LEL(CH4)
17 %Vol
100 ppm
25 ppm
* The concentration for calibration may be modified on PC through WatchGas IR LINK (options).
3 sec.
