VEGA VEGASWING 66 - two-wire With SIL qualification - Manual (Page 24)

24
6 Setup
VEGASWING 66 • - two-wire
44952-EN-130805
Sensor Signal con-
ditioning
instrument
Mode on the
signal con-
ditioning
instrument
Level Signal cur-
rent - Sensor
Signal lamp -
green
Voltage sup-
ply
Signal lamp -
yellow
Switching
status
Signal lamp
- red
Fault mes-
sage
Analogue
- input con-
trol 1)
Mode max.
Overflow pro-
tection
approx. 8 mA > 3.8 mA
< 11.5 mA
Mode max.
Overflow pro-
tection
approx. 16 mA > 12.5 mA
< 21.6 mA
Mode min.
Dry run pro-
tection
approx. 8 mA > 3.8 mA
< 11.5 mA
Mode min.
Dry run pro-
tection
approx. 16 mA > 12.5 mA
< 21.6 mA
Failure of the
supply volt-
age
Mode (max./
min.)
any - ≤ 3.6 mA
≥ 21 mA
Fault message
Mode (max./
min.)
any approx.
1.8 mA
≤ 3.6 mA
≥ 21 mA
6.4 Proof test
To find out possible undetected, dangerous failures, a proof test must
be carried out in adequate time intervals to check the safety function.
It is the user's responsibility to choose the type of testing.
You will find further instructions in the Safety Manual.
The following options are available for carrying out the proof test:
1. Short interruption of the supply line to the sensor or pushing the
test key (with function test).
Average coverage (detected errors)
2. Dismounting of the sensor and immersion in the original medium
High coverage (detected errors)
3. Filling of the vessel up to the switching point
1) Electronics directly evaluated via the analogue input of a control system
(without signal conditioning instrument)