Mounting / Dismounting The Button Unit; Mounting / Dismounting The Lcd Display; Measuring Cell Of The Multivariable Transmitter - ABB 2600T Series Operating Instruction

15.3 Mounting / dismounting the button unit

Fig. 53
1. Unscrew the fastening screws of the rating plate and
swing the rating plate to the side to obtain access to the
local operating elements.
2. Unscrew the fastening screws (1) of the button unit that
hold the spring-loaded plastic part.
3. Remove the seal (3) that is located below the plastic cover
of the button unit.
4. Now the three operating buttons (4) and the springs (5)
can be taken out.

15.4 Mounting / dismounting the LCD display

1. On the side of the electronics module / LCD display,
unscrew the housing cover.
IMPORTANT (NOTICE)
For devices with "Ex d" / "Flameproof Enclosure
type of protection", comply with the instructions
in the section "Securing the housing cover of
devices with "Ex d" type of protection.
2. Fit on the LCD display. Depending on the install position
of the multivariable transmitter, the LCD display can be fit
on in four different positions. Consequently it can be
rotated by ± 90° or ± 180°.
2. Screw on the housing cover hand tight.

15.5 Measuring cell of the multivariable transmitter

Normally the measuring cell of the transmitter is essentially
maintenance-free. Nevertheless the following should be
checked regularly:
— The sealing points of connected lines must be intact.
There must not be any visible cracks on the process
flanges.
— There must be no leaks at the connection points between
sensor and flange and on the vent / drain valves.
— The screws on the process flanges must not show any
corrosion.
If defects are detected in the inspection described above, the
parts in question must be replaced with original spare parts. If
information on spare parts is required, contact an ABB office
or refer to the spare parts list. If spare parts are used that are
not original parts, the garantee is invalidated.
266CRx, 266JRx, 266CSx, 266JSx | OI/266CXX/266JXX/HART-EN Rev. B 79