M&C PMA Series Instruction Manual page 40

Operating conditions
Ambient conditions:
Temperature: 0 °C to +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 temperature 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 enclosure purging or enclosure ventilation. Generally a fine filter with min. 2 μm 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 observed, because the current outlet 4-20
mA is dependent on the measuring range. If the measuring range is choosen externally it is mandatory nec-
essary to analyze the external measuring indication (see Fig. 5).
The analyzer has to be maintained and calibrated regularly expertly according to the manufacturer'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 association chemistry)
edition 07/2009. For other applications the leaflet BGI 836 of the Main Association 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 of the whole safety chain has to be performed. Thus also the yearly system
check according to the Industrial Safety Regulation is covered.
For the analyzer the prooftest comprises the regular calibration / adjustment as well as triggering and test of
the switch function of the status relay (fail safe relay).
40 PMA 50 EX | 1.01.04 www.mc-techgroup.com