VEGA VEGADIF 34 … 51 - Manual (Page 22)

22 VEGADIF 34 … 51
20094-EN-030731
2.2 Pre-installation
Selection of the installation location
Especially under extreme ambient conditions,
selection of a suitable mounting site is decisive
for the
- quality of the measurement
- lifespan of the transmitter
- level of maintenance expenses.
Please observe the following rules:
Installation level
• Below the min. level for level measurements
(the diaphragm or the isolating diaphragm
must be completely covered by the me-
dium).
• Above the pressure tapping point for
measurement of gases.
• Below the pressure tapping point for meas-
urement of vapours and liquids.
Mounting location
• Mount the transmitter as near as possible to
the pressure tapping point.
• Keep impulse lines as short as possible.
• Mounting and maintenance work should be
carried out without obstructions.
• The transmitter, the tapping points, the
impulse lines and the valves should be
easily accessible.
• If available, the mounting site should pro-
vide a good view to the LC display.
Ambient influences
• Keep vibration and shock to a minimum.
• Avoid corrosive ambient atmosphere.
• Reduce condensation to a minimum.
Note:
Under unfavourable ambient conditions, a
protective housing is recommended.
Mounting
Adaptation of the transmitter
To optimally adapt your VEGADIF to the instal-
lation site, the following measures can be
carried out:
Rotate the electronics housing
After loosening the locking screw below the
electronics housing, the housing can be ro-
tated by approx. 330°. A stop prevents further
turning. By this means the terminal compart-
ment can be set to an optimum position for
cable entry or the LC display to an optimum
reading position.
When the best position is reached, tighten the
locking screw again.
Fig. 2.1 Loosen the locking screw
Fig. 2.2 Fastening the locking screw