M&C TechGroup PMA 50 EEX Operator's manual - Manual (Page 37)

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Gas sampling and gas conditioning technology 9-3.15-ME
Operating conditions
Ambient conditions:
Temperature: -10 °C bis +50 °C
Pressure: 0.9- 1.1 bar abs.
Vibrations have to be avoided.
The sample gas has to be dry (dew point 5°C) and dust free and the sample gas inlet temper a-
ture is not allowed to exceed 50°C. The maximum inlet pressure is 1,1 bar abs. for the standard
device and 1,5 bar abs. for devices with encosure purging or ventilation equipment. Generally a
fine filter with min. 2µm has to be installed upstream.
Sample gas has to discharge freely into atmosphere at the sample gas outlet because a pressure
rise at the outlet and therefore in the measuring cell will result in false readings.
Especially the accuracy of the adjusted measuring range has to be observe d, because the cur-
rent outlet 4-20mA is dependent on the measuring range. If the measuring range is choosen ex-
ternally it is mandatory necessary to interpret the external measuring indication (see Fig. 5).
The analyser has to be maintained and calibrated regularly expertly according to the manufactu r-
er’s data.
The maintenance intervals for monitoring of inertization processes have to be specified according
to leaflet BGI 518 of the Main Association of Trade Associations (= leaflet T 023 of the trade as-
sociation chemistry) edition 07/2009. For other applications the leaflet BGI 836 of the Main Ass o-
ciation of Trade Associations (= leaflet T 021 of the trade association chemistry) edition 07/2009
has to be applied.
Yearly proof test
Minimum once a year a proof test for the whole safety chain has to be performed. Thus also the
yearly system check according to the Industrial Safety Regulation is covered.
For the analyser the prooftest comprises the regular calibration / adjustment as well as triggering
and test of the switch function of the status relay (fail safe relay).