ABB 266 DDS, Manual

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2 6 6 DDS H A RT |
P R E SSU R E T R A N SM I T T ER S | O I/ 2 6 6 D DS - EN R E V. B
Transmitter housing rotation
To improve field access to the wiring or the visibility of the
optional LCD meter, the transmitter housing may be rotated
through 360° and fixed in any position. The loosened tang-
screw acts as a stop to prevent the housing from being turned
too far. In order to proceed with housing rotation, the housing
stop tang-screw has to be unscrewed by approximately 1
rotation (do not pull it out) and, once the desired position has
been reached, retightened.
Figure 11: Housing rotation
Integral display rotation
In case an optional integral display meter is installed, it is
possible to mount the display in four different positions
rotated clockwise or counterclockwise with 90° steps. To rotate
the LCD, simply open the windowed cover (Hazardous area
prescriptions must be respected), pull-out the display housing
from the communication board. Reposition the LCD connector
according to the new desired position. Push back the LCD
module on the communication board. Be sure that the 4 plastic
fixing locks are properly in place.
Figure 12: Display rotation
Display removal
To remove the LCD it is necessary to gently grab the entire
component from the lower plastic as shown in the picture
below.
Figure 13: Grabbing area for display removal
Impulse piping connection for standard
instruments
In order for the pipes to be laid correctly, the following points
must be observed:
• The measuring pipes must be as short as possible and free
from sharp bends.
• Lay the impulse piping in such a way that no deposits
accumulate in them. Gradients should not be less than
approx. 8% (ascending or descending).
• The measuring pipes should be blown through with
compressed air or, better yet, flushed through with the
measuring medium before connection.
• Completely depressurize the impulse lines if the medium is a
fluid.
• Lay the impulse lines in such a way that gas bubbles (when
measuring fluids) or condensate (when measuring gases) can
flow back into the process line.
• Make sure the connection is tight.
• Lay the impulse line in such a way that prevents the medium
from being blown out over the measuring equipment.
s
Process leaks may cause harm or result in death. Install and
tighten process connectors and all accessories (including
manifolds) before applying pressure. In case of toxic or
otherwise dangerous process fluid, take any precautions as
recommended in the relevant Material Safety Data Sheet
when draining or venting. Use only a 12 mm (15/32 in)
hexagonal spanner to tighten the bracket bolts..
CAUTION