Calibrating The Sensors; Replacing/Adding Modules - ProMinent DULCOMETER Assembly And Operating Instructions Manual

ProMinent ®
6.3

Calibrating the Sensors

IMPORTANT
• It is possible for water to escape and spray arround. Take appropriate
measures, if necessary.
• If a potential equaliser pin is used during measurement, a potential equaliser
pin must also be connected during calibration and immersed in the same
medium as the sensor (please refer to the operating manual of the
measurement and control system).
pH and redox sensors:
pH and redox sensors can also be calibrated/checked after installation. Use the calibration cup
supplied for this purpose.
Close the ball valve in the in-flow of the in-line probe housing
Close the stop valve in the out-flow of the in-line probe housing
Unscrew the blanking plug of the appropriate module
Fill the calibration cup with buffer solution up to the mark
Screw the calibration cup carefully into the module from below
If a potential equaliser pin is used during measurement, connect the potential equaliser pin to
the calibration cup.
Calibrate/check the sensor (please refer to the operating manual of the control system).
Unscrew the calibration cup and screw in the blanking plug
Connect the potential equaliser pin of the blanking plug
Open the ball valve slightly and check that the module is sealed properly before opening the
system fully
Set the flow as required (see section 6.1).
Membrane capped sensors:
Please refer to the operating manual for the sensor.
6.4

Replacing/Adding Modules

IMPORTANT
• It is possible for water to escape and spray arround. Take appropriate
measures, if necessary.
• All module connections are fragile. Tighten them gently by hand.
NOTE
• If you would like 4 or 5 modules instead of just 2 or 3, a mounting panel for 4 to
5 modules is required.
• Moistening the seals slightly first will make it easier to assemble the modules.
To replace a module, proceed as follows:
Close the ball valve and, if there is one, the stop valve on the out-flow side
Unscrew and store the sensors (please refer to the sensor operating manuals)
Remove all hoses from the in-line probe housing
Unscrew all modules and release them from the clamps
Empty the modules
If a larger mounting panel is required, remove the existing mounting panel from the wall
Release the module that is to be replaced from the module block (figure 4 in reverse)
Check that all O-rings are inserted on the connection nipples of the new module
Moisten the connection nipple of the new module with water
Place the new module on the module block as shown in figure 4.
Commissioning the DGMa
Page 27