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NivoGuide® 8100 • Two-wire 4 … 20 mA/HART
7 Diagnostics and servicing
58878-EN-190215
7.5 Exchanging the cable/rod
If necessary, the cable or rod (measuring part) of the probe can be
exchanged.
Loosen the rod or cable with a fork wrench, wrench size 7 (rod ø 8,
cable ø 2 and 4) or wrench size 10 (rod ø 12).
Note:
When exchanging the rod or cable, make sure that the instrument and
the new rod or cable are dry and clean.
1. Loosen the rod or cable with a fork wrench applied to the flat
surface, provide counterforce with another fork wrench.
2. Dry the process fitting and the upper rod end before unscrewing
the measuring rod.
3. Unscrew the loosened rod or cable manually.
4. Insert the new measuring rod carefully by hand with a screwing
motion into the opening of the process fitting.
5. Continue screwing in the rod manually into the opening of the pro-
cess fitting.
6. Exert counterforce with the second fork spanner and tighten the
rod or cable on the flat surfaces with the following torque.
Rod ø 8, cable ø 2 and 4: 6 Nm (4.43 lbf ft)
Rod ø 12: 10 Nm (7.37 lbf ft)
Fig. 28: Exchange cable or rod
Information:
Please maintain the specified torque so that the max. tensile strength
of the connection remains.
7. Enter new probe length and if necessary the new probe type and
then carry out a fresh adjustment (see "
Setup procedure, Carry-
ing out min. adjustment - Carrying out max. adjustment
").
The rod or cable of the probe can be shortened individually.
1. Mark the requested length with mounted measuring rod.
2. Cable: Loosen the pins on the gravity weight (hexagon 3)
Exchanging the cable/rod
Shorten cable/rod
Summary of Contents for NivoGuide 8100
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