KROHNE OPTIBAR P 3050 C EN - Manual (Page 16)

3
INSTALLATION
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OPTIBAR P 3050 C
www.krohne.com 03/2012 - 4001953401 - MA OPTIBAR P3050C R02 en
3.5.3 Pressure connection via impulse line
Bear the following in mind when connecting the pressure connection via an impulse line:
• Select the shortest impulse line possible and lay without sharp bends.
• Avoid deposits and blockages in the impulse line. Accordingly, lay the impulse line so that
such occurrences are impossible. Do not exceed a drop or rise of approx. 8% in the pipe.
• Ensure that the impulse line flows freely before the connection and rinse with compressed
air or, even better, with the product itself.
• When measuring liquid, the impulse line must be completely purged of air.
• Run the impulse line so that trapped air (when measuring liquids) or condensate (when
measuring gas) can flow back into the process line.
• Hot steam must not enter the process connection (the excess temperature will destroy the
device). To avoid this situation, a suitable water trap (such as a U-tube filled with water prior
to installation) can be installed upstream from the measuring device.
• Ensure that the connection is perfectly sealed!
3.5.4 Opening the device, installing and dismantling the graphic display
Electrically, the graphic display is connected to the device using a plug connector on the
connection board with the aid of a flying lead. The display is mechanically fixed by way of a
spacer plugged into the connection board. For optimal readability, the display can be infinitely
rotated on this bracket by 350°, adjusting to any of the pressure transmitter's possible
installation positions.
DANGER!
Check whether the ambient air around the signal converter is explosive. Opening the signal
converter in an explosive atmosphere may result in ignition and explosion.
DANGER!
The product may cause the signal converter to become extremely hot. Possible risk of burning.
For this reason, promptly shut off the process or isolate the signal converter sufficiently from
the product prior to starting work and check that the converter has cooled down to room
temperature.
DANGER!
For devices used in hazardous areas, additional safety notes apply; please refer to the Ex
documentation.
.book Page 16 Thursday, March 8, 2012 9:29 AM