Installation Guidelines; The Sensors; Installation Of The Sensors - Siemens LDS 6 Operating Instructions Manual

Installation Guidelines

Installation Guidelines
CD 6C – Water vapor sensor for LDS 6
A5E00912721-01
This chapter provides instructions for the installation of the CD
6C sensors and cables. Figure 3.1 below shows the principle set-
up of the LDS 6 central unit, sensors and cables.
LDS 6
Sensor
(transmitter)
Hybrid Cable
Figure 3.1 Principle set-up of an installation
3.1

The Sensors

3.1.1 Installation of the sensors

It is necessary to remove the air moisture inside the sensor
heads. The transmitter and receiver sensor heads are delivered
from the factory with readily mounted nitrogen purge connec-
tions:
nitrogen inlet (1), purging tube (2) and the check valve (3), see
Figure 3.2 "Sensor mounting – bottom view". The high pressure
window can be purged using the check valve input (7).
NOTE
If required, purging of the dry nitrogen into the process is possible.
This is done by connecting the purge nitrogen inlet (5) both to the
transmitter and receiver side. A use of check valve is highly recom-
mended to prevent the process gas from leaking into the nitrogen
net in case of a sudden drop in the nitrogen supply net. As standard
this input is delivered with a plug.
N purging intake
2
(for sensor head)
N purging intake
2
(for process, if applicable)
Measurement
Volume
Loop Cable
3
Sensor
(receiver)
11