Table of Contents
Advertisement
11. Maintenance
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), as described in the instructions in the
section "Operation resp. Configuration of the transmitter". If
deposits are expected to accumulate, the measuring
equipment should be cleaned on a regular basis, in accordance
with the operating conditions. Cleaning should ideally be
carried out in a workshop.
Repair and maintenance activities may only be performed by
authorized customer service personnel. When replacing or
repairing individual components, original spare parts must be
used.
Attention – Potential damage to parts.
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>.
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.
11.1 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 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.
11.2 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.
— The process flanges bolts (for 266DS/MS/PS/VS/RS
models) should not show excessive rust.
In case one of the check points above fails, please replace the
damaged part with an original spare part.
The electronic
Explosion-proof transmitters must be
Please contact your local ABB office for spare parts support
information or refer to the spare part list.
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 complete with the
return form that you find at the end of this manual and include
it with the device.
Figure 50: DP and P style pressure transmitter construction
11.3 Removing/Installing the process flanges
— Slacken the process flange screws by working on each in
a crosswise manner (hexagon head, SW 17 mm
(0.67 inch) for 266DS/266PS/266VS or SW 13 mm
(0.51 inch) for 266MS/266RS).
— Carefully remove the process flange, making sure that the
isolating diaphragms are not damaged in the process.
— Use a soft brush and a suitable solvent to clean the
isolating diaphragms and - if necessary - the process
flange.
— Insert the new process flange O-rings in the process flange.
— 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 the
exception of vertical process flanges).
— Check that the process flange screw thread can move
freely: Manually turn the nut until it reaches the screw
head. If this is not possible, use new screws and nuts.
— Lubricate the screw thread and seats of the screw
connection.
— While performing the preliminary and final tightening of the
bolts, please act in a crosswise manner.
2600T Series Pressure transmitters | OI/266/FF-EN Rev. B 45
11 Maintenance
Advertisement
Table of Contents
