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2 6 6 D D S H A R T | P R E S S U R E T R A N S M I T T E R S | O I/ 2 6 6 D D S - E N R E V. B
9 Maintenance / Repair
If transmitters are used as intended under normal operating
conditions, no maintenance is required. It is sufficient to check
the output signal at regular intervals (in accordance with the
operating conditions). If deposits are expected to accumulate,
the equipment should be cleaned on a regular basis, in
accordance with the operating conditions.
Cleaning should ideally be carried out in a workshop.
IMPORTANT
In case of aggressive environment and any critical condition,
ABB recommends to check O-rings periodicalli. In case of
damage, user shall replace them with original spare parts.
Repair and maintenance activities may only be performed by
authorized customer service personnel.
266DDS user repair is not permitted.
When replacing or repairing individual components, original
spare parts must be used.
CAUTION
Potential damage to parts. The electronic components of the
printed circuit board can be damaged by static electricity
(observe ESD guidelines). Make sure that the static electricity
in your body is discharged when touching electronic
components. If a remote seal is mounted on the measuring
equipment, it must not be removed (please refer to the
dedicated document).
WARNING - BODILY INJURY
Explosion-proof transmitters must be either repaired by the
manufacturer or approved by a certified expert following
repair work Observe the relevant safety precautions before,
during and after repair work. Only disassemble the
transmitter to the extent necessary for cleaning, inspection,
repairs, and replacement of damaged components.
Returns and removal
Defective transmitters sent to the repairs department must,
wherever possible, be accompanied by your own description of
the fault and its underlying cause.
WARNING - GENERAL RISK
Before removing or disassembling the device, check for
hazardous process conditions such as pressure on the device,
high temperatures, aggressive or toxic media, and so on.
Read the instructions in the sections "Safety" and "Electrical
connection", and perform the steps outlined there in reverse
order.
Pressure transmitter sensor
Essentially maintenance is not required for the transmitter
sensor. Anyway the following items should be checked
periodically:
• Check the integrity of the pressure boundary (no cracks
should be visible on the process connection or on the process
flanges.
• Check that there is no leakage from the sensor/flange
interface or from the vent/drain valves.
In case one of the check points above fails, please replace the
damaged part with an original spare part.
IMPORTANT
The use of non original spare parts makes the warranty void.
In case you want ABB to perform the repair, please send back
the transmitter to your local ABB office.
IMPORTANT
In the case of oil and grease-free designs, clean the
measuring chambers again if necessary once the process
flange has been installed.
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