Page 13
Page 12
MagnaPool™ | Installation Manual
5.7
Calibration Procedure
To maintain accurate and reliable operation,
the sensors must be calibrated before using the
controller with pH/Dual Link module. After initial
calibration, it is recommended to recalibrate
sensors every few months.
5.7.1
Clean the Sensor(s)
Sensor(s) must be cleaned before calibration,
including prior to initial use after installation.
1.
Turn off the filter pump.
2. Close all valves.
3. Remove the sensor and the sensor holder
from the POD.
4. Rinse the sensor with tap water for 1 minute.
Shake off excess water.
NOTE:
To avoid damaging the active sensor,
do not rub or dry with a cloth.
5. Brush the junctions and metal strip using a
toothbrush for 1 minute.
Figure 23. Cleaning Probe
6. Prepare a diluted hydrochloric acid solution by
pouring 50 mL tap water into 1 mL (10 drops)
of commercially-available hydrochloric acid
(HCl 37%).
WARNING
•
Hydrochloric acid is a hazardous chemical that
may cause burns, lesions, and irritations. Handle
with extreme care using protective equipment
(gloves, goggles, coveralls). Refer to the
substance SDS sheet for more information.
•
Always pour acid into water.
•
Once cleaning is complete, dispose of the solution
according to standard in effect in the country of
use.
7. Wash the sensor in the diluted hydrochloric
acid solution for 2 minutes.
8. Rinse sensor in clean tap water for 1 minute.
Shake off excess water.
5.7.2
Calibrate the pH Sensor
The pH sensor (blue) can be calibrated in 1 or 2
points. We recommend 2-point calibration for a
more reliable measurement throughout the season.
1. Turn on power to the controller.
2. Turn off the pool pump and close valves as
necessary to isolate the cell and sensors.
3. Unscrew the pH sensor from the POD.
4. Rinse the end of the sensor with tap water.
Shake off excess water. Do not touch the
glass bulb at the end of the pH sensor.
5. Start 1 or 2 point calibration via the controller
User Interface, see Section 8.3 For details.
6. If calibration is unsuccessful, see Section 11.
Troubleshooting.
5.7.3
Calibrate the ORP Sensor
1. Verify power to the controller is on,pump is off,
and valves are closed isolating the cell and
sensors.
2. Unscrew the ORP sensor from the POD.
3. Rinse the end of the sensor with tap water.
Shake off excess water. Do not touch the end
of the ORP sensor.
4. Place the probe in a sample of ORP 470 mV
buffer solution for one minute.
5. Start calibration via the controller User
Interface, see section 8.4.
6. Once calibration is complete, replace
the sensor on the POD. If calibration is
unsuccessful, see Section 11.