Replacement measuring electrodes
The Promag F Type DN 350...DN 2000 is available with replacement electrodes.
This version enables the measuring electrodes to be cleaned or replaced under process conditions.
Replacing an electrodes is carried out as follows:
Dismantling the electrode:
1. Loosen the Allen screws (a) of the cap/cover.
2. Unscrew the electrode cable (c) attached to the
rotary arm (b).
3. Undo the knurled nut (d) by hand. This nut is
used as a counter nut.
4. Remove the electrode (e) using the rotary arm
(b). This can now be taken out from the holder
(g) as far as the stop allows.
Warning!
The electrode can spring back to the
stop. Keep pressing against it
while loosening.
5. Close the shut-off valve (f) after the electrode has
been taken out as far as the stop.
Warning!
Do not attempt to open the shut-off
valve. Keeping it shut prevents
medium from escaping.
6. Unscrew the entire electrode along with the hol-
ding cylinder (g).
7. Remove the pins (h) below the rotary arm.
8. Replace electrode with a new one.
A set of new electrodes can be ordered from
E+H.
Assembling the electrode:
1. Slide the new electrode (e) through the holding
cylinder (g) from below.
Gaskets at the tip of the electrode must be in
place and clean.
2. Connect the rotary arm (b) and electrodes toge-
ther using the pins (h). Ensure that the small coil
spring is in place.
3. Pull back the electrode as far as possible so that
the tip does not protrude out from the holding cy-
linder (g).
4. Screw the holding cylinder onto the shut-off unit
(I) and tighten by hand.
Note!
Gasket (j) on the holding cylinder
must be in place and clean.
5. Open the shut-off value (f) and screw in the
electrode using the rotary arm (b). Pull the
electrode on by hand.
6. Screw the knurled nut (d) onto the holding cylin-
der in order to clamp the electrode tight.
7. Secure the electrode cable (c) to the rotary arm
using the Allen screw.
Caution!
Ensure that the Allen screw of the
electrode cable is tight. A close
electrical contact cannot otherwise
be guaranteed and this can lead to
measurement errors.
ba008y67
a
h
f
i
b
d
g
a
j
e
c
• left side:
Type DN 1350...2000
• right side:
Type DN 350...1200
Fig. 21
3. Mounting and Installation Promag 30
22 Endress+Hauser
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