VEGA VEGAFLEX 81 4 … 20 mA_HART two-wire - Manual (Page 75)

75
9 Diagnostics and service
VEGAFLEX 81 • 4 … 20 mA/HART two-wire
41824-EN-130612
9.6 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).
1. Loosen the rod or cable with a fork wrench applied to the flat
surface, provide counterforce with another fork wrench.
2. Unscrew the loosened rod or cable manually.
3. Insert the new measuring rod carefully by hand with a twisting
motion into the opening of the process fitting.
4. Continue screwing in the rod manually into the opening of the pro-
cess fitting.
5. 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. 45: Exchange cable or rod
Information:
Please keep the stated torque so that the max. tensile strength
remains.
6. 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").
Exchanging the cable/rod