Vega VEGAVIB 63, Руководство по эксплуатации

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22
6 Setup
VEGAVIB 63 • NAMUR
31217-EN-170315
> 2,2
I/mA
< 1
3
±1
t/s
1
2
1,5
±0,5
Fig. 22: Flow chart of the function test - Switching function according to the
covered and characteristics selection (see function table)
1 High Current
2 Low Current
Check if all the 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. Keep in mind that connected instruments are
activated during the function test. This allows you to 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.
After releasing the button or after a brief line break.
Sensor cur-
rent
Level relay
amplifier
- overflow
protection
Level
relay ampli-
fier - dry run
protection
Signal lamp
amplifier
- overflow
protection
Signal lamp
amplifi -
er - dry run
protection
Signal lamp
- sensor
1. Low Current
(3 s ±1 s) ≤ 1 mA energized currentless
2. High Current
(1.5 s ±0.5 s) ≥ 2.2 mA currentless energized
3. Return to the
actual operating con-
dition
You can carry out the function test with the stated current values also
directly with a safety PLC or a process control system.
Test procedure