Measuring - M&C PMA Series Instruction Manual


The signal to be measured can be calculated as follows:
Measured value =
A test gas concentration of 20.93% (air) would result in the following:
Output signal
0-10 V DC
Output signal
0-20 mA
4-20 mA
N O T E !

Shut the output valve of the pressure regulator and the bottle valve and separate the tube connection
to the analyzer.

The span calibration has been completed.
A T T E N T I O N !
16

MEASURING

For the first starting up at a new location, all steps in the chapters before have to be performed.
By the requirements of precision the interval of the new calibration can be carried out daily or weekly. The
sample gas quantity should be adjusted corresponding to the requirements between 10 Nl/h and 60 Nl/h air.
After choice of the desired measuring range the analyzer is ready for operation.
C A U T I O N !
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(max. signal output - min. signal output) x Concentration [%]

Measuring range span value [%]
Signal to be measured with span value
Signal to be measured with span value
30 %
13.95 mA
15.16 mA
The mA-signal depends on the adjusted measuring range. Therefore, it is
important to check the correctness of the measuring range chosen!
After completion of calibration set measuring range selection switch to de-
sired measuring range again.
The mA-output signal is dependent on the measuring range!
The sample gas must be free from all liquid or solid particles, i.e. the dew
point of the gas has to be below the equipment temperature so that no
condensate will occur inside the equipment. If necessary, lower the dew
point by means of a cooler or dryer. For dust filtration use a filter of 2 mi-
cron porosity!
We will be pleased to inform you about an optimal gas conditioning
100 %
2.09 V
100 %
4.19 mA
7.35 mA
PMA30 | 1.01.03
+ min. Signal output
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