22
PMA45K1 | 1.00.01
www.mc-techgroup.com
NOTE!
Always calibrate with the gas quantity that is used for measurement.
•
Wait approx. 20 - 30 seconds, until the indication is stable.
•
If necessary, adjust in the front of the sensitivity potentiometer (
3
, see figure 2) by means
of the screw driver the sensitivity to the value that corresponds exactly to the test gas
concentration. For air this is for example 20.9 % O
2
.
•
Check the recorder’s output signals at 20.9% O
2
:
•
Shut off pressure reducer valve and bottle- resp. instrumental air valve respectively switch
of the integrated sample gas pump.
•
Remove the tube connection on the analyzer.
Determination of the signal value:
(S
e
– S
np
) V or mA x gas concentration Vol. % O
2
Measuring range final value Vol. % O
2
Se = Final value signal output
Snp = Zero point signal output
•
Shut the pressure regulator output valve and the bottle valve. Remove the tube connection
on the analyzer.
The sensitivity calibration is finished.
NOTE!
If during the sensitivity calibration great deviations have to be compen-
sated (>2% O
2
) at the potentiometers, a second zero and sensitivity cali-
bration is recommended.
A T T E N T I O N
After finishing the calibration, turn selector switch to the desired meas-
uring range again.
The mA output signal is dependent on the measuring range!
Output signal
Measured value
range 100 % O
2
Measured value
range 25 % O
2
0-10 V
2.09 V
0-20 mA
16.744 mA
4-20 mA
17.40 mA
+ S
np
