VEGA VEGASWING 66 - two-wire With SIL qualification - Manual (Page 27)

27
6 Setup
VEGASWING 66 • - two-wire
44952-EN-130805
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)
Test procedure
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
4. Return
to current
operating
condition
- - - - - -
Note:
When used as overfill protection according to WHG and use in meas-
uring chains according IEC 61508, mode B is not permitted.
Test assessment (SPLC)
Test passed
•
Interference signal (< 3.6 mA) ≥ 400 ms
•
Uncovered (approx. 8 mA) ≥ 1 s
•
Covered (approx. 16 mA) ≥ 1 s
Test not passed
•
Interference signal (< 3.6 mA) < 400 ms / ≥ 750 ms
•
Uncovered (approx. 8 mA) < 1 s / ≥ 2 s
•
Covered (approx. 16 mA) < 1 s / ≥ 2 s
You can dismount the sensor for test purposes and check its function
by immersing the vibrating element in the original medium.
Procedure
1. Carry out the function test according to the above description (1
Short interruption of the supply line to the sensor.
2 Dismounting of the sen-
sor and immersion in the
original medium
2) Starting time of the voltage supply