40 266HSH MODBUS TRANSMITTER | PRESSURE/TEMPERATURE MULTIVARIABLE | OI/266HSHMT-EN REV. A
9 Maintenance
If transmitters are used as intended under normal
sufficient to check the output signal at regular intervals
out in a workshop.
Important. In case of aggressive environment and any critical
condition, ABB recommends to check O-rings periodically. In
case of damage, user shall replace them with original spare
parts.
original spare parts must be used.
Attention – 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.
9.1 Returns and removal
Defective transmitters sent to the repairs department
Warning – General risks. 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.
9.2 Pressure transmitter sensor
cracks should be visible on the process connection
or on the process flanges.
flange interface or from the vent/drain valves.
the damaged part with an original spare part.
appendix and include it with the device.
9.3 Removing/Installing the process flanges
that the isolating diaphragms are not damaged in
the process.
flange.
flange.
5. Attach the process flange to the measuring cell.
The surfaces of both process flanges must be at the same
level and at a right angle to the electronics housing (with
and nuts.
connection.
manner.
Attention – Potential damage to parts. Do not use sharp or
pointed tools.
Do not damage the insolating diaphragms.
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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