TPS miniCHEM-Temp, Руководство пользователя

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Page 9
3.2 Mounting the Enclosure
The miniCHEM-Temp 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 control point (ie. heater or cooling tower etc.).
This will cause the sensor to detect the change in Temperature immediately, and
shut automatic control off until mixing has taken place. For in-line mounting, it is
important that Temperature control is upstream. Additionally, the line can be run
through a mixing chamber, such as a large drum, to ensure that the areas of
varying temperatures have 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. Control point close to sensor. 1. Injection point upstream from
2. Continuous stirring. and close to sensor.
2. Mixing container after injection
and before sensor.