Davey M5138, Инструкция по установке и эксплуатации

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5.3 Operating Principle
The Davey Peristaltic pump adjusts its dosage in proportion to the
demand. It will dose less if the displayed measure is near the set point.
In normal operation, the Davey Peristaltic pump will increase its ‘non
operational’ time period proportional to the required dosage demand.
That is why the device often has the pump off. This is normal .
Adjust the pH slowly to preserve the natural quality of your water.
After 30 minutes without pressing the keys, the backlight turns off to save
energy. A short press on SET or CAL turns it on again.
6. Maintenance
6.1 Replacement of the Peristaltic Tube
Follow steps 1 to 9 as shown
1.
5.
9.
2.
6.
3.
7.
4.
8.