Pr
o
Minent
®
Page 107
pH/Chlorine
Assembling
sensor
IMPORTANT
• Depressurise the system before inserting the sensor into the in-line probe housing.
Close the stop valves before and after the in-line probe housing.
• Insertion and withdrawal of the sensor into or out of the in-line probe housing should be
carried out slowly.
• Do not exceed the maximum operating pressure of 1 bar.
• Do not allow the fl ow to fall below the minimum rate of 30 l/h. Monitor the fl ow with the
connected measuring device/controller. If the sensor‘s signal is used for con trolling,
switch off the controller or adjust it to constant load when the fl ow rate falls below the
lower limit.
• Avoid installations which allow air bubbles to enter the sample water. Air bubbles
clinging to the sensor membrane can lower the resultant measured value and cause
incorrect dosing within the control system.
Fitting the sensor in
the in-line probe housing
Note also the instructions and safety guidelines in the operating instructions of the in-line probe
housing.
DLG III
Slide the O-ring from below over the sensor up to the clamping ring.
Insert the sensor into the DLG III.
Fix the sensor tightly by screwing in the plug.
DGM
Slide the O-ring from below over the sensor up to the clamping ring. Leave a fl at washer inside
the DGM.
Insert the sensor in the DGM and screw on the plug until the O-ring seals. The clamping ring
determines the installation depth of the sensor.
Assembly
Installation of the DULCOTEST
®
PHEP or PHER sensor for pH
Remove the blanking plug of the respective measuring module at the fi ttings of the measuring/
control station DULCOTROL
®
and install the DULCOTEST
®
PHEP or PHER sensor for pH.
8.9.2.2
DULCOTEST
®
CTE Sensor for Total Chlorine and DULCOTEST
®
Sensor
PHEP or PHER for pH, Electrical Installation
DULCOTEST
®
CTE sensor for total chlorine
General Safety Guidelines
IMPORTANT
Install in such as way as to ensure a totally reliable, uninterrupted power supply to the
controller. Too low a voltage supply can cause measuring failures, which may result in
dangerous overdosing within a control system.
The CTE 1-mA sensor has a passive 4-20 mA two-wire interface. The power supply is provided
externally or by the controller. When the sensor is connected to the DULCOMETER
®
D1C
controller the interface’s safety require ments are met automatically.
IMPORTANT
For electrical connection of the sensor to the controller, only use wires with a diameter of
4 mm.
Electrical
Installation
Turn the top part of the sensor a quarter of a turn anticlockwise and remove.
Remove the outer isolation of the cable for about 5 cm from the end so that the two wires
appear.
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