Supply Connections; Sample Gas Inlet And Sample Gas Outlet - M&C PMA Series Instruction Manual

When using the analyzer outdoors, it must be protected against the effects of the weather.
If possible, the installation should be done in constant climatic ambient conditions.
A vibration-free location is ideal for installation. If this is not possible, antivibration mounts must be used to
decouple the housing.
The analyzer must not be installed in direct proximity of heat sources.
Warning
16

SUPPLY CONNECTIONS

16.1

SAMPLE GAS INLET AND SAMPLE GAS OUTLET

The sample gas inlet and outlet are placed on the lower side of the analyzer. Both are equipped with breath-
ing and draining devices type MC95A. The breathing and draining devices have a 1/4" NPT female thread.
Warning
20
The sample gas must be dry (dew point 5 °C [41 °F]), free from dust and the sample
gas temperature must not exceed 50 °C [122 °F]. Otherwise an upstream sample
gas cooler with automatic condensate removal is necessary.
A preceding fine filter of at least 2 μm is absolutely necessary.
The sample gas has to flow off atmospherically freely at the sample gas outlet,
because a pressure rise at the sample gas outlet and therefore in the measur-
ing cell falsifies the oxygen measurement.
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.
The analyzer is suitable for use in explosive atmosphere group II category 2.
Equipment with protection
to measure explosive gases of group II category 2.
The oxygen analyzer PMA50 EX is suitable for analyzing gas mixtures classified in
Zone 1 with an oxygen content of up to 21 % by volume.
Higher oxygen concentrations are not covered by the ATEX directive.
The Ex-approval of the oxygen analyzer is only valid in connection with the ap-
proved breathing and draining devices. For this reason, it is not allowed to remove
them or to use other types of breathing and draining devices!
PMA 50 EX | 1.01.04
II 2G Ex db eb IIC T4 Gb (see type plate) is suitable
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