266CRx, 266JRx, 266CSx, 266JSx | OI/266CXX/266JXX/HART-EN Rev. B 25
8.8 Rotating the integral LCD display
If the device has an integral LCD display, this can be mounted
in four different positions, each of which can be rotated
through 90°.
To rotate the LCD display, open the windowed cover (ensuring
compliance with special requirements for hazardous areas)
and pull the LCD display out of the electronics module.
Reposition the LCD display connector accordingly. Plug the
LCD display back into the electronics module, checking that
the 4 plastic fixing locks are securely in place.
Fig. 17: Rotating the LCD display
8.9 Conn
ecting impulse lines
In order for the impulse lines to be laid correctly, the following
points must be observed:
— The impulse lines must be as short as possible and have
no sharp bends
— Lay the impulse lines so that no deposits can accumulate
in them. Gradients should not be less than approx. 8 %
(ascending or descending)
— The impulse lines should be blown through with
compressed air or, better still, flushed through with the
medium prior to connection
— With wet legs, the liquid in both lines must be at the same
level
— With vaporous measuring media, measures must be taken
to prevent steam entering the measuring chambers of the
measuring cell and causing overheating
— It may be necessary to use condensate vessels or similar
with small mea
suring spans and vaporous media
— If you are using condensate vessels (steam measurement),
you should ensure that the vessels are at the same
elevation in the differential pressure piping
— As far as possible, keep both impulse lines at the same
temperature
— Completely depressurize the impulse lines if the medium is
a liquid
— Lay the impulse lines so that gas bubbles (when
measuring liquids) or condensate (when measuring gases)
can flow back into the process line
— Ensure that the impulse lines are connected correctly
(connection of high-pressure and low-pressure sides to
the measuring cell, seals, etc.)
— All connections must be secure and tight
— Lay the impulse lines so that the medium cannot be blown
out over the measuring cell
WARNING – bodily injury!
Leaks in the process lines ca
n result in death or
severe injuries.
Install and seal process connections and all
accessory elements (including valve blocks)
before the charging the device with pressure.
For applications with toxic or hazardous
substances prior to venting or draining, take all
precautionary measures that are recommended in
the respective safety data sheet. Only tighten the
screws of the fastening accessories with a size 12
mm (15/32”) inch hexagon socket wrench.
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