CPR Touch XL, Control Unit
Index: 03 Date modified: 22/06/2022
OI No.: BA MR 001-03 Steuereinheit CPR Touch XL EN.docx
Page 49 of 70
(diaphragm cleaner) supplied with the delivery. For this purpose, the glass shaft of the pH
electrode is submerged in the electrode cleaner for a few minutes.
ATTENTION!
During all work on the pH electrode, it must be ensured that
neither the electrode’s screw plug head nor the plug of the
electrode cable are exposed to humidity! Even the smallest amount
of humidity in the electrode head may lead to a distortion of the
measuring value or even to a premature failure of the electrode!
All contacts in the electrode’s plug head and on the electrode plug
must display a shiny golden colour and may not show any signs of
corrosion
NOTICE!
After each cleaning or exchange of the electrode, a calibration must
be carried out! Do not touch the glass top (sensor part) and the
diaphragm with your fingers.
7.1.4
Combination reference-return electrode
For the combination reference-return electrode (PG13,5 blue), a service life of one to two
years may be expected, as well. The same safety measures as for the pH electrode apply.
7.1.5
Chlorine electrode - exchange the gasket set
As part of the annual maintenance, the flat gasket in the chlorine electrode ¾“ and the
corresponding O ring in the measuring cell must be exchanged. When inserting the
electrode, ensure that no cleaning beads are present in the thread.
7.1.6
Redox electrode - exchange the gasket set
As part of the annual maintenance, the flat gasket in the redox electrode ½“ and the
corresponding O ring in the measuring cell must be exchanged. When inserting the
electrode, ensure that no cleaning beads are present in the thread.
7.1.7
Flow regulator - exchange the maintenance kit
The diaphragm in the flow control valve is subject to ageing and can become brittle, which
negatively affects the quality of the flow control. This diaphragm must be renewed after
several years of operation. A maintenance kit with the required components is available.
