Emerson Mobrey Hydratect 2462, Reference Manual

Page: 54 / 66

48
Reference Manual
24625020, Rev AA
Electrodes Servicing
March 2017
Electrodes Servicing
Recommended periodic check procedure
1. Inspect the electrode covers and cables.
Any damaged item must be removed and a serviceable replacement part fitted.
Standard replacement parts are listed in
“Electrode replacement parts” on
page 50 .
2. Loosen the cable glands on the electrode covers. Remove screws securing the
cover, and then ease the cover away from the manifold (or insert). This action
reveals the electrode.
3. Remove any dust accumulation with a soft brush.
4. Inspect the electrodes for correct sealing and freedom from damage.
An electrode fault, such as a leaking seal or a damaged electrode, must be repaired
as described in
“Repairing an electrode” on page 48 .
A faulty seal is indicated by wisps of steam, which appears to come from the
external ceramic insulator (of the electrode) or from the electrode nut. Steam will
always tend to emanate from a leak, even if the electrode is immersed in water.
This is due to the temperature in a pressurized system causing water to flash-off to
steam as it reaches ambient pressure.
5. Check the electrode connections are in good condition and are tightly secured.
Tighten any loose connection.
6. Re-fit and secure the electrode cover. after ensuring that the electrode, electrode
mounting, and electrode cables are in a serviceable condition.
7. Tighten the electrode cable glands.
This periodic check is now complete.
5.3 Repairing an electrode
An electrode must be removed for repair or replacement if it has any of the following faults:

Contaminated insulator

Defective seal

Mechanical damage
Note
To ensure that electrodes fitted to multiple-port manifold are reconnected correctly after
service, complete work on one electrode before moving on to the next.
Do not attempt to cure a defective seal simply by tightening the electrode nut.