Liquiphant M/S with electronic insert FEL58 + Nivotester FTL325N
36
Hauser
2. Check the current at terminal 2.
After immersing the fork (plus a response time of approx. 1 s), the current must be
between 0.6 to 1.0 mA.
If the current is outside the specified tolerance, a fault has occurred in the safety path. The
proof test has not been passed and must be aborted.
Step 3
1. Slowly retract the tuning fork vertically from the water.
The water surface is within the limits for "Retract free".
2. Check the current at terminal 2.
After retracting the fork (plus a response time of approx. 2 s), the current must be
between 2.2 to 3.5 mA.
If the current is outside the specified tolerance, a fault has occurred in the safety path. The
proof test has not been passed and must be aborted.
Version II to VI, test sequence C, MAX detection
Step 1
1. Slowly immerse the tuning fork vertically into the water.
The water surface is within the limits for "Immerse free".
2. Check the status of the safety contacts.
Version
Terminal
II
III
IV
V
VI
4+5
Closed
Not applicable
Closed
Closed
Closed
22+23
Not applicable
Closed
Closed
Closed
Not applicable
26+27
Not applicable
Closed
Closed
Closed
Not applicable
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. Slowly further immerse the tuning fork vertically into the water.
The water surface is within the limits for "Immerse covered".
2. After immersing the fork (plus a response time of approx. 1 s), check the status of the safety
contacts.
Version
Terminal
II
III
IV
V
VI
4+5
Open
Not applicable
Open
Open
Open
22+23
Not applicable
Open
Open
Open
Not applicable
26+27
Not applicable
Open
Open
Open
Not applicable
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 3
1. Slowly retract the tuning fork vertically from the water.
The water surface is within the limits for "Retract free".
2. After retracting the fork (plus a response time of approx. 2 s), check the status of the safety
contacts.