14
4 Mounting
VEGABAR 81 • 4
… 20 mA
45025-EN-140228
1
2
3
4
4
4
Fig. 5: Position of the filter element - non-Ex, Ex-ia version
1 Housing plastic, stainless steel precision casting
2 Housing aluminium
3 Housing stainless steel, electropolished
4 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 non-detachable cable
•
Instruments with absolute 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
downward after installtion of the instrument. This provides better
protection against buildup.
2
1
3
4
3
4
Fig. 6: Position of the filter element - Ex-d version
1 Single chamber housing, aluminium, stainless steel precision casting
2 Double chamber housing, aluminium, stainless steel precision casting
3 Rotatable metal ring
4 Filter element
Instruments with absolute pressure have a blind plug mounted
instead of the filter element.
Instruments in Ex-d ver-
sion