VEGA VEGASWING 66 - Relay With SIL qualification - Manual (Page 11)

11
4 Mounting
VEGASWING 66 • - Relay
44950-EN-130805
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, 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
nameplate.
In general, VEGASWING 66 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 applies
to water in conjunction with the basic setting of the density switch
≥ 0.7 g/cm³ (0.025 lbs/in³). When mounting VEGASWING 66, make
sure that this marking is at the height of the requested switching point.
Keep in mind that the switching point of the instrument will shift if the
medium has a density other than water - water is 1 g/cm³ (0.036 lbs/
in³). For products < 0.7 g/cm³ (0.025 lbs/in³) and > 0.47 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 lead to erroneous switchings,
particulary when the sensor is used for dry run protection.
2
3
1
4
Fig. 3: Vertical mounting
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. 33 mm (1.3 in)
1
2
Fig. 4: Horizontal mounting
1 Switching point
2 Marking on top with threaded versions, marking aligned to flange holes with
Suitability for the process
conditions
Switching point