12
4 Mounting
VEGAPULS 67 • 4 … 20 mA/HART - four-wire
36532-EN-160224
4 Mounting
4.1 General instructions
On instruments with threaded process fitting, the hexagon must be
tightened with a suitable wrench. For the proper wrench size see
chapter "
Dimensions
".
Warning:
The housing must not be used to screw the instrument in! Applying
tightening force can damage internal parts of the housing.
Protect your instrument against moisture ingress through the following
measures:
•
Use the recommended cable (see chapter "
Connecting to power
supply
")
•
Tighten the cable gland
•
When mounting horizontally, turn the housing so that the cable
gland points downward
•
Loop the connection cable downward in front of the cable gland
This applies mainly to outdoor installations, in areas where humidity is
expected (e.g. through cleaning processes) and on cooled or heated
vessels.
Make sure that all parts of the instrument exposed to the process are
suitable for the existing process conditions.
These are mainly:
•
Active measuring component
•
Process fitting
•
Process seal
Process conditions are particularly:
•
Process pressure
•
Process temperature
•
Chemical properties of the medium
•
Abrasion and mechanical influences
You can find detailed information on the process conditions in chapter
"
Technical data
" as well as on the type label.
Metric threads
In the case of instrument housings with metric thread, the cable
glands are screwed in at the factory. They are sealed with plastic
plugs as transport protection.
You have to remove these plugs before electrical connection.
NPT thread
In the case of instrument housings with self-sealing NPT threads, it is
not possible to have the cable entries screwed in at the factory. The
free openings for the cable glands are therefore covered with red dust
protection caps as transport protection. The dust protection caps do
not provide sufficient protection against moisture.
Screwing in
Protection against mois-
ture
Suitability for the process
conditions
Cable glands
Содержание VEGAPULS 63
Страница 24: ...24 4 Mounting VEGAPULS 67 4 20 mA HART four wire 36532 EN 160224 Fig 22 Purging air connection ...
Страница 81: ...81 Notes VEGAPULS 67 4 20 mA HART four wire 36532 EN 160224 ...
Страница 82: ...82 Notes VEGAPULS 67 4 20 mA HART four wire 36532 EN 160224 ...
Страница 83: ...83 Notes VEGAPULS 67 4 20 mA HART four wire 36532 EN 160224 ...