16
4.4.2. Adjusting the ZERO
-
Necessary when a cell is replaced.
-
At least twice a year.
-
Connect a voltmeter to the two terminal posts provided for that purpose (MF and MES), as
shown below.
-
Be sure to be in pure atmosphere (without gas) (If not, inject air)
-
Adjust the ZERO (0 mV) with the potentiometer, item 1.
4.4.3. Checking the sensitivity
-
Necessary when a cell is replaced.
-
At least twice a year.
-
Prepare the calibration kit and secure the gas input pipe to the detector.
-
Adjust the flow rate of the reference gas
6
(1) to 60 l/h before injecting.
-
Allow to stabilize for at least 10 seconds.
-
Check that the alarm or alarms are triggered (as applicable
6
) and carry out the following
procedure.
6
The value of the reference gas must be higher than at least the first alarm threshold.
FIGURE 8
Item 1
V
Item 2
