Polaris Watermatic C-660, Руководство пользователя, Страница: 17 / 31

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VIII. Maintenance
A. Cleaning the Sensor Tips
1. It is important to keep the sensor tips clean to assure accu-
rate readings. When the sensor tips become dirty, the indi-
cator lights will read lower than the actual sanitizer/pH level
and can cause too much sanitizer/pH to be dispensed.
Note: A sensor tip coated with calcium scale will not look
visibly dirty.
2. As a general rule, the sensor tips should be cleaned every
one to four weeks for commercial pools and spas, and once
each month for residential pools and spas. However, clean-
ing frequency can vary from one body of water to another.
To determine the appropriate frequency for your pool or spa,
note reading prior to cleaning. After cleaning the sensor,
allow a stabilizing period of approximately ten minutes. If the
reading is identical to the reading prior to cleaning, the sen-
sor was not dirty and the time between sensor cleanings can
be increased.
3. To clean the sensor tip, turn off the controller. Loosen the
compression fitting nut and gently remove the sensor from
the bypass assembly. Swirl the tip for five seconds in
Muriatic acid or white vinegar, and rinse it in water.
Do not
touch, wipe or brush the end of the sensor .
4. For commercial pools and spas, every third cleaning, swirl
the sensor tip in a solution of liquid soap and water. Rinse
with water.
5. Gently replace the sensor in the bypass assembly and turn
on the controller.
6. Allow the controller to operate for a few minutes to get an
accurate reading. Adjust the set knob if necessary.
B. Checking the ORP Sensor
1. The ORP sensor should be checked every six months or
anytime the feeder oversanitizes the water.
2. Clean the sensor tip as noted above.
3. Place the sensor in a clean glass of tap water. This should
give a reading of between 200 and 400 mV. Adding a pinch
of Dichlor or Trichlor should cause the ORP level to jump to
between 750 and 800 mV. (If Dichlor or Trichlor are not