Emerson Mobrey Hydratect 2462, Справочное руководство

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47
Reference Manual
24625020, Rev AA
Electrodes Servicing
March 2017
Electrodes Servicing
Section 5 Electrodes Servicing
5.1 Service summary
Section 5 describes the servicing procedure that must be followed to ensure continued and
trouble-free operation of the Hydratect 2462 system.
Electrodes should be examined periodically to ensure that each one is fully serviceable, as
described in
“Periodic check” on page 47 , Faults discovered during a periodic check must be
repaired in accordance with the procedure described in Section 5.3.
All servicing work must be done in accordance with the safety precautions listed in “Safety
precautions” on page 47 .
To avoid extended system downtime, it is wise to ensure the immediate availability of all
spares listed in
“Electrode replacement parts” on page 50 .
5.1.1 Safety precautions
The following safety procedures must be observed for all service work:

Electrodes must be serviced strictly in accordance with site practices.

Where it is customary, obtain a 'permit to work' before starting the service.

Ensure that any tripping action likely to occur is inhibited.

Where automatic control actions could be initiated, these actions must be
inhibited outside the Hydratect 2462 system before starting the service.

Advise the operators of any unusual effects likely to occur during the service.

Where operator warning alarms are fitted, operators must be informed which
alarms will be affected and for how long.

Ensure that you know the correct procedures before starting the service.

Wear industrial gloves when working on the electrodes and associated fittings.
5.2 Periodic check
A periodic check should be made (monthly, for example) to ensure the electrodes,
manifolds and cables are in a serviceable condition. This examination should reveal any
faults that are obvious from the electrode exterior. Faults must be repaired as described in
“Repairing an electrode” on page 48 .
The condition of the electrode insulator, within the pipe, is monitored continuously by the
Hydratect 2462 Electronics Control Unit. Whenever the electrode insulator becomes
contaminated, the alarm LED is illuminated and the alarm output is switched to the fail-safe
(alarm) state. The electrode must then be cleaned as described in
“Repairing an electrode”
on page 48 .