VEGA VEGAWAVE S 61 - Manual (Page 15)

Flows
To minimise flow resistance caused by the tuning
fork, VEGAWAVE S 61 should be mounted in such
a way that the surfaces of the blades are parallel to
the product movement.
Adhesive products
In case of horizontal mounting in adhesive prod-
ucts, the surfaces of the tuning fork should be
vertical in order to reduce buildup on the tuning
fork. On the screwed version you will find a marking
on the hexagon. With this, you can check the
position of the tuning fork when screwing it in.
When the hexagon touches the seal, the thread
can still be turned by approx. half a turn. This is
sufficient to reach the recommended installation
position.
4 C onnecting to power supply
4 .1
Preparing the connection
Note safety instructions
Always keep in mind the following safety instruc-
tions:
l
Connect only in the complete absence of line
voltage
l
Take note of safety instructions for Ex appli-
cations
Connect the power supply according to the
following diagrams. The oscillator with relay output
is designed in protection class 1. To maintain this
protection class, it is absolutely necessary that the
ground conductor is connected to the internal
ground terminal. Take note of the general installa-
tion regulations. As a rule, connect VEGAWAVE S
61
to vessel ground (PA), or in case of plastic
vessels, to the next ground potential. On the side of
the housing there is a ground terminal between the
cable entries. This connection serves to drain off
electrostatic charges.
The data for voltage supply are specified in chapter
"Technical data" in the "Supplement".
Selecting connection cable
VEGAWAVE S 61 is connected with standard four-
wire cable with round cross-section. An outer cable
diameter of 5 … 9 mm ensures the seal effect of
the cable entry.
If cable with a different diameter or wire cross
section is used, exchange the seal or use an
appropriate cable connection.
4 .2
Connection procedure
Proceed as follows:
1 Unscrew the housing cover
2 Loosen compression nut of the cable entry
3 Remove approx. 10 cm (4 in) of the cable
mantle, strip approx. 1 cm (0.4 in) insulation
from the ends of the individual wires
4 Insert the cable into the sensor through the
cable entry
5 Lift the opening levers of the terminals with a
screwdriver (see following illustration)
6 Insert the wire ends into the open terminals
according to the wiring plan
7 Press down the opening levers of the termi-
nals, you will hear the terminal spring closing
8 Check the hold of the wires in the terminals by
lightly pulling on them.
9 Tighten the compression nut of the cable entry.
The seal ring must completely encircle the
cable
10 If necessary, carry out a fresh adjustment
11 Screw the housing cover on
The electrical connection is finished.
Fig. 10: Connection steps 5 and 6
VEGAWAVE S 61 15
Connecting to power supply
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