VEGA VEGASWING 66 - two-wire - Manual (Page 26)

26
6 Setup
VEGASWING 66 • - two-wire
43758-EN-130322
•
Empty signal
•
Full signal
1
2
3
16
I/mA
8
3,6
1,5 1,5 1,5
t/s
Fig. 37: Flow chart of the function test
1 Full signal
2 Empty signal
3 Fault message
Check if all three switching conditions occur in the correct sequence
and the stated time period. If this is not the case, there is a fault in the
measuring system (see also the operating instructions manual of the
signal conditioning instrument). Keep in mind that connected instru-
ments are activated during the function test. By doing this, you can
check the correct function of the measuring system.
Note:
Keep in mind that the starting time t
A
of the voltage supply can extend
the time up to the first switching (e.g. VEGATOR 636: +1 s)
After releasing the button or after a brief line break.
The specified times apply with a tolerance of ±20 %.
Sensor
current -
Sensor
Level relay
A - overfill
protection
Signal lamp
A - Overfill
protection
Level relay
B - dry run
protection
Signal lamp
B - Dry run
protection
Fail safe
relay
Control
lamp
1. Fault sig-
nal
approx. 1.5 s
+ t
A
2)
< 3.6 mA currentless currentless currentless
2. Empty
signal
(approx.
1.5 s)
approx.
8 mA
energized currentless energized
3. Full signal
(approx.
1.5 s)
approx.
16 mA
currentless energized energized
Test procedure
2) Starting time of the voltage supply