Endress+Hauser Nivotester FTL325P - Test Sequence B, Simulation Using Test Button on Liquiphant

Nivotester FTL325P Proof testing
Endress+Hauser 27
Step 3
1. Re-install the sensor that was removed (optional).
 Wait for power-up (10 s).
2. Restore the status OK by fully exposing the tuning fork.
 Wait for the switching delay to elapse (1 s, unless ordered otherwise).
3. Check the status of the safety contacts.
 The contacts to be checked must be closed.
If one or more safety contacts are open, a fault has occurred in the safety path. The proof
test has not been passed and must be aborted.
6.4 Test sequence B, simulation using test button on Liquiphant
No change of level in the tank is necessary for this sequence.
Note the following for the test sequences:
Test sequence B (simulation) is not permitted for a commissioning test.
The contacts to be checked depend on the version.
Version II and version VI:
Terminal 4 + 5
Version III:
• Terminal 22 + 23
• Terminal 26 + 27
Version IV and version V:
• Terminal 4 + 5
• Terminal 22 + 23
• Terminal 26 + 27
Step 1
‣
Check the status of the safety contacts.
 The contacts to be checked must be closed.
If one or more safety contacts are open, a fault has occurred in the safety path. The proof
test has not been passed and must be aborted.
Step 2
1. Press the test button.
 The device restarts (3 s), the status OK (safety contacts closed) is then maintained
for 2 s afterwards.
If the button is pressed for a short period, the demand mode is maintained for 5 s
afterwards.
If the button is pressed for a longer period, the demand mode is maintained as long
as the button remains pressed.