VEGA VEGATOR 636 Ex Ship approvals - Manual (Page 19)

19
6 Setup
VEGATOR 636 Ex • Signal conditioning instrument
23446-EN-130627
A-mode B-mode
2 Simulation an empty signal (approx. 1.5 s)
Level relay energised
Relay control lamp lights Relay control lamp off
2 Simulation of an empty signal
Failure lamp
Failure lamp off Failure lamp off
3 Simulation of a full signal (approx. 1.5 s)
Level relay deenergised
Relay control lamp off Relay control lamp lights
3 Simulation of a full signal
Failure lamp
Failure lamp off Failure lamp off
4 Return to the current operating condition (covered/
uncovered)
Check the process of the function test. Take the following criteria into
account for evaluation of the result:
Test passed
If all three switching conditions occur in the correct sequence and the
specified duration (±20 %), then the test is passed and the instrument
functions correctly.
Test not passed
•
The specified times deviate considerably from the table (>3 s)
•
One of the switching conditions remains unchanged
•
No start-up of the test - no signal sequence
6.3 Function chart
The following chart provides an overview of the switching conditions
depending on the set mode and the level.
The mode switch on the sensor (if available) must be set to max.
operation.
Sensor (max. opera-
tion)
Signal conditioning instrument
Mode on
the signal
condi-
tioning
instrument
Level Signal
current -
Sensor
Sig-
nal lamp
- Switch-
ing output
(yellow)
Con-
trol lamp
- Failure
(red)
Outputs
Mode A
Overflow
protection
approx.
8 mA
Relay ener-
gized
transistor
conducts
Mode A
Overflow
protection
approx.
16 mA
Relay de-
energized
transistor
blocks
Evaluation