VEGA VEGABAR 87 4 … 20 mA_HART - Operating Instructions User Manual
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4 Mounting
VEGABAR 87 • 4 … 20 mA/HART
45044-EN-131010
1
2
3
6
6
6
6
6
5
4
Fig. 6: Position of the filter element - non-Ex, Ex-ia and Ex-d-ia version
1 Single chamber housing plastic, stainless steel (precision casting)
2 Single chamber housing Aluminium
3 Single chamber housing, stainless steel electropolished
4 Double chamber housing plastic
5 Double chamber housing Aluminium
6 Filter element
With the following instruments a blind plug is installed instead of the
filter element:
•
Instruments in protection IP 66/IP 68 (1 bar) - ventilation via capil-
laries in fix connected cable
•
Instruments with absolut pressure
The filter element is integrated in the process assembly. It is located in
a rotatable metal ring and has the following function:
•
Atmospheric pressure compensation (with relative pressure meas-
uring ranges)
Turn the metal ring in such a way that the filter element points down-
ward after installtion of the instrument. This provides better protection
against buildup.
Instruments in Ex-d ver-
sion