Endress+Hauser PROFI BUS Proline Promag 53 PROFIBUS DP Operating Manual page 158

Troubleshooting
158
Removing the electrode
1st Loosen the Allen screw (1) and remove the cover.
2n Remove the electrode cable (2) secured to handle (3). 2n
d
3rd Loosen knurled nut (4) by hand. This knurled nut acts
as a locknut.
4th Remove the electrode (5) by turning the handle (2).
The electrode can now be pulled out of the retaining
cylinder (7) as far as a defined stop.
#
Warning!
Risk of injury. Under process conditions (pressure in
the piping system) the electrode can recoil suddenly
against its stop. Apply counter-pressure while
releasing the electrode.
5. Close the stop cock (6) after pulling out the electrode
as far as it will go.
#
Warning!
Do not subsequently open the stop cock, in order to
prevent fluid escaping.
6. Remove the electrode complete with
retaining cylinder (7).
7. Remove the handle (2) from the electrode (5) by
pressing out the locking pin (8). Take care not to lose
the coil spring (11).
8. Remove the old electrode and insert the new
electrode. Replacement electrodes can be ordered
separately from Endress+Hauser.
Proline Promag 53 PROFIBUS DP/PA
Installing the electrode
1st Insert the new electrode (5) into the retaining cylinder
(7) from below. Make sure that the seals at the tip of
the electrode are clean.
Mount the handle (2) on the electrode and insert the
d locking pin (8) to secure it in position.
"
Caution!
Make sure that coil spring (11) is inserted. This is
essential to ensure correct electrical contact and
correct measuring signals.
3rd Pull the electrode back until the tip of the electrode
no longer protrudes from retaining cylinder (7).
4th Screw the retaining cylinder (7) onto the ball-valve
housing (9) and tighten it by hand. The seal (10) on
the cylinder must be correctly seated and clean.
!
Note!
Make sure that the rubber hoses on the retaining
cylinder (7) and stop cock (6) are of the same color
(red or blue).
5. Open the stop cock (6) and turn the handle (2) to
screw the electrode all the way into the retaining
cylinder.
6. Screw the knurled nut (4) onto the
retaining cylinder. This firmly locates the electrode in
position.
7. Use the Allen screw to secure the electrode cable (3)
to the handle (2).
"
Caution!
Make sure that the machine screw securing the
electrode cable is firmly tightened. This is essential to
ensure correct electrical contact and correct
measuring signals.
8. Reinstall the cover and tighten the Allen screw (1).
Endress+Hauser