KROHNE SU 501 EX EN - Manual (Page 19)

l
Full signal
Check if all three switching conditions occur in the correct
sequence and the stated duration. If not, there is a fault in the
measuring system (see chapter "Fault rectification").
Note:
Keep in mind that the connected instruments are activated
during the function test. By doing this, you can check the
correct function of the measuring system.
Test procedure A-mode B-mode
1 Simulation of a fault signal (approx. 3 s)
Level relay deenergised Relay control
lamp off
Relay control
lamp off
1 Simulation of a fault signal
Failure lamp Failure lamp
lights
Failure lamp
lights
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)
SU 501 Ex - Signal conditioning instrument 19
Set up
27953
-EN
-050616