13
4 Mounting
VEGABAR 18 • Two-wire 4 … 20 mA
55575-EN-200327
This applies mainly to outdoor installations, in areas where high
humidity is expected (e.g. through cleaning processes) and on cooled
or heated vessels.
Make sure that the degree of contamination specified in chapter
"
Technical data
" meets the existing ambient conditions.
Ventilation and pressure compensation for VEGABAR 18 are provided
by an air-permeable, moisture-blocking filter element.
1
Fig. 6: Position of the filter element
1 Filter element
For effective ventilation, the filter element must always be free of
buildup.
Caution:
Do not use a high-pressure cleaner. The filter element could be dam-
aged, which would allow moisture into the housing.
On devices with a threaded fitting, the hexagon on the process fitting
must be tightened with a suitable wrench.
See chapter "
Dimensions
" for wrench size.
Warning:
The housing or the electrical connection may not be used for screw-
ing in! Depending on the device version, tightening can cause dam-
age, e. g. to the rotation mechanism of the housing.
The permissible process pressure range is stated on the type label.
The instrument should only be operated with these pressures if the
mounting accessory used also fulfils these values. This should be en-
sured by suitable flanges, welded sockets, tension rings with Clamp
connections, sealings, etc.
Higher process temperatures often mean also higher ambient
temperatures. Make sure that the upper temperature limits stated in
chapter "
Technical data
" for the environment of the electronics hous-
ing and connection cable are not exceeded.
Ventilation and pressure
compensation
Screwing in
Process pressure range -
Mounting accessory
Temperature limits
