DDPHCL2_man_r1.0 – 03/2021
Page 18
Extraordinary maintenance – Replacing the peristaltic tube:
Unscrew the two front screws and remove the transparent cover.
To remove the old tube, first release the left connector and then turn
the roller-holder as shown by the arrow in the figure, to free the tube
up to the right connector.
Insert the left connector into the new tube, in its housing, while
making sure that the rounded part is positioned inward.
Then turn the roller-holder clockwise, so that the tube is inserted in its
housing.
Insert the right connector in its housing and tighten the two front
screws to fix the transparent cover.
Pump wintering:
Before shutting down the system for wintering or anyway for a long period, dose
clean water to rinse the tube, then rotate the roller-holder clockwise to position it as
shown in the figure.
pH and Redox Electrodes
Typically, it is recommended to clean the electrodes when the response is slow or measurements are
not reliable, and when they have been used for a long time, especially in aggressive solutions,
pollutants, very acidic or very alkaline environments. A kit of solutions is available, for the cleaning and
storage of pH and redox electrodes. The kit includes three solutions:
-
Solution A: dip the electrode in this solution for cleaning it
-
Solution B: use this solution to rinse the electrode, before and after cleaning
-
Solution C: storage solution to be used for filling the electrode protective cap when the electrode is
not used (wintering, closure of the plant)
