IM-P693-13 EMM Issue 2
6
CP42 Conductivity Probe
The CP42 is supplied in nominal tip lengths of 300, 500, or 1000 mm, (12", 20" and 39") and cannot be cut
to length.
300 mm and 500 mm probes can be installed vertically or horizontally.
CAUTION: 1 000 mm probes must be installed vertically only.
WARNING: Do not install the probe outdoors without additional weather protection.
WARNING: The boiler must be depressurised and vented to atmosphere before installation of the
probe. Wherever possible the boiler manufacturer must be consulted for advice on the positioning
of the probe and the optimum TDS level.
Always install the probe:
-
In a position where it can sense the conductivity of the boiler water.
-
As far away from the feedwater inlet as possible.
-
As near to the centre line of the boiler as possible. This lowers the risk of it being in the steam bubbles
normally found towards the top of the boiler, or in the higher concentration of suspended solids found
at the bottom of the boiler.
Note: The tip of the probe must be 10 mm (3/8") away from any boiler tubes and project at least 55 mm
(21/8") into the boiler. It may be necessary to make up a stand-off for certain installations in order to achieve
these measurements. Vertically installed probes must be immersed to a minimum depth of 100 mm (4").
Probe tip
10 mm (3/8") minimum
Probe body
Enclosure
Cable gland
Fig. 2 Installation diagram
55 mm
(21/8")
minimum
3. Installation
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