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M&C TechGroup PMA 50 EEX Operator's manual User Manual

Page 24

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24

Gas sampling and gas conditioning technology

9-3.15-ME

Wait approx. 30 seconds until the display is stable. If necessary, adjust the O

2

-value of the test

gas via the span potentiometer 10 (figure 1) (with a screw driver at air 20,93%);

Check the analog output signals;

The signal to be measured can be calculated as follows:

(max. signal output - min. signal output) x Concentration [%]
Measured value =



+ min. Signal output

Measuring range span value [%]

A test gas concentration of 20,9% (air) would result in the following:

Output signal

Signal to be measured with span value

100 %

0-10 V DC

2,09 V

Output signal

Signal to be measured with span value

30 %

100 %

0-20 mA

13,95 mA

4,19 mA

4-20 mA

15,16 mA

7,35 mA

N O T E !


The mA-signal depends on the adjusted measuring range. There-
fore, it is important to check the correctness of the measuring
range chosen !

Shut the output valve of the pressure regulator and the bottle valve and separate the tube

connection to the analyser.

The span calibration has been completed.

A T T E N T I O N !

After completion of calibration set measuring range selection
switch to desired measuring range again.
The mA-output signal is dependend on the measuring range!