VEGA VEGASWING 61 - transistor (NPN-PNP) - Manual (Page 10)

10
4 Mounting
VEGASWING 61 • - transistor (NPN/PNP)
29225-EN-130409
4 Mounting
4.1 General instructions
Make sure that all parts of the instrument coming in direct contact with
the process, especially the sensor element, process seal and process
fitting and suspension cable, are suitable for the existing process
conditions, such as process pressure, process temperature as well as
the chemical properties of the medium.
You can find the specifications in chapter "Technical data" and on the
type plate.
In general, VEGASWING 61 can be installed in any position. The
instrument only has to be mounted in such a way that the tuning fork
is at the height of the desired switching point.
The tuning fork has lateral markings (notches) that indicate the
switching point with vertical mounting. The switching point refers
to water with the basic setting of the sensitivity switch ≥ 0.7 g/cm³
(0.025 lbs/in³). When mounting VEGASWING 61, make sure that
this marking is at the height of the requested switching point. Keep in
mind that the switching point of the instrument is shifted if the medium
has a density other than water - water 1 g/cm³ (0.036 lbs/in³). For
products < 0.7 g/cm³ (0.025 lbs/in³) and > 0.5 g/cm³ (0.018 lbs/in³)
the density switch must be set to ≥ 0.5 g/cm³.
Keep in mind that foams with a density > 0.45 g/cm³ (0.016 lbs/in³)
are detected by the sensor. This can cause faulty switchings particu-
lary when used as dry run protection system.
2
3
1
4
Fig. 2: Mounting vertical
1 Switching point approx. 13 mm (0.51 in)
2 Switching point with lower density
3 Switching point with higher density
4 Switching point approx. 27 mm (1.06 in)
Suitability for the process
conditions
Switching point