14
4 Mounting
VEGABAR 87 • Modbus and Levelmaster protocol
46297-EN-220624
1
2
Fig. 6: VEGABAR 87, transport and mounting protection
1 Transmitter
2 Transport and mounting protection
Remove this protection after mounting and before setting up the
instrument.
In case of slightly contaminated measured media, the transport and
mounting protection can remain on the instrument as an impact pro-
tection during operation.
4.2 Ventilation and pressure compensation
The filter element in the electronics housing has the following func-
tions:
•
Ventilation of the electronics housing
•
Atmospheric pressure compensation (with relative pressure meas-
uring ranges)
Caution:
The filter element causes a time-delayed pressure compensation.
When quickly opening/closing the housing cover, the measured value
can change for approx. 5 s by up to 15 mbar.
For an effective ventilation, the filter element must be always free from
buildup. In case of horizontal mounting, turn the housing so that the
filter element points downward after the instrument is installed. This
provides better protection against buildup.
Caution:
Do not use a high-pressure cleaner. The filter element could be dam-
aged, which would allow moisture into the housing.
The following paragraphs describe how the filter element is arranged
in the different instrument versions.
Filter element - Function
