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❹ Maintenance
4.1 I Changing the peristalti c tube
•
Remove the peristalti c pump cover,
•
Place the roller holder at "10:20" by turning it clockwise,
•
Completely free the left fi tti ng by keeping it stretched outwards,
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Then turn the roller holder clockwise to free up the tube as far as the right fi tti ng
•
Make sure that the roller holder is in the 10:20 positi on.
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Insert the left fi tti ng of the new peristalti c tube into its housing.
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Then pass the tube into the roller holder guide.
•
Turn the roller holder clockwise and accompany the tube as far as the right fi tti ng.
•
Refi t the peristalti c pump cover.
4.2 I Winterizing
• Always keep the sensor in water and frost-protected.
•
During winterising, it is recommended to leave the pump in clean water in order to
rinse the peristalti c tube by carrying out manual priming (see §"3.4 I Priming the
peristalti c pump").
•
Then place the roller holder at 6 o’clock to facilitate restarti ng.
•
Remove the pH sensor from its holder and store it in its original bott le or in a container
fi lled with tap water.
•
Close off the sensor holder if necessary.
