Page 10
3.2 Mounting the Enclosure
The
mini
CHEM
-Cond
can be wall-mounted with 3 screws. Two mounting points
are located underneath the terminal cover, and are positioned so that they do not
affect the waterproofing of the enclosure. The third mounting point is centrally
located near the top of the rear of the enclosure, and has been designed to hook
over a screw-head. The dimensions for the mounting screw centres are provided on
the rear of the enclosure. The last page of this manual may be photocopied or
removed for use as a drilling template.
3.3 Mounting the Sensor
Mounting the sensor is a very important aspect of the installation, and is often
done incorrectly. In automatic control situations, the sensor should always be
mounted as close as possible to the injection point. This will cause the sensor to
detect the added chemicals or water immediately, and shut the addition off until
mixing has taken place. For in-line mounting, it is important that injection is
upstream. Additionally, the line must be run through a mixing chamber, such as a
large drum, to ensure that the injected chemical or water has mixed in properly by
the time the solution flows past the sensor. There must always be adequate flow of
fresh sample past the sensor for accurate monitoring. The diagrams below show
typical mounting arrangements for “dip” mounting and in-line mounting.
Dip Mounting
In-line Mounting
1. Injection point close to sensor. 1. Injection point upstream from
2. Continuous stirring. and close to sensor.
2. Mixing container after injection
and before sensor.
3. A flow-through assembly for in-line
mounting is available from TPS.
