VEGA VEGABAR 81 4 … 20 mA - Operating Instructions - Manual (Page 14)

14
4 Mounting
VEGABAR 81 • 4 … 20 mA
45025-EN-131010
1 2 3
4 4 4
Fig. 5: Position of the filter element - non-Ex, Ex-ia version
1 Plastic, stainless steel precision casting
2 Aluminium
3 Stainless steel, electro-polished
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 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.
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.
The filter element is mounted into the electronics housing. It has the
following functions:
Instruments in Ex-d ver-
sion
Instruments with Second
Line of Defense