Zodiac TRi pH Module - Calibrating the Sensor(S); Adjusting the Set Point(S)

H0412500.A - EN - 2013-02
8
EN
- TRi PRO module:
pH set point
ACL set point
A '^' symbol appears to the right of the set point if the value measured by the equipment needs to be corrected automa-
cally (pH of water in the pool higher than the set point and/or insucient chlorine level). Then pH minus is injected and/
or chlorine produced automacally according to the dened cycles.
By default, pH regulaon (peristalc pump in the TRi pH or TRi PRO module) is disabled and the LCD screen will
display 'pH ---'. It is enabled automacally about 8 hours aer being turned on. To enable pH regulaon immedi-
ately and so display the set point on the LCD screen, see § 3.6.2.
3.3 Calibrang the sensor(s)
• To operate accurately and reliably, the sensors must be calibrated before using the TRi chlorinator with the TRi
pH or TRi PRO module. To maintain maximum eciency of the unit, we recommend calibrang at least once
every 2 months during the period the swimming pool is being used.
• Ensure the sensors are cleaned before calibraon (see § 4.1).
• Conrm that the TRi power pack is plugged in,
• Stop the pool pump and isolate the sensors by closing any valves, so as to be able to re-
move the sensors safely.
• Remove the sensors from their sensor holder on the POD (unscrew the locking ring by
hand).
• Rinse the end of the sensors with clean water and shake them to remove excess water.
Do not touch or wipe the glass bulb at the end of the sensors.
• Put the pH sensor into a sample of the pH7.5 buer soluon supplied.
• Put the ACL sensor into a sample of the 700 mV buer soluon supplied.
• Leave the sensors immersed for about 1 minute to obtain a reliable measurement.
• Press , then use the or keys to display 'CALIB. PH' or 'CALIB. PH/ACL', then press .
• Use the or keys to display 'PH CALIBRATION' or 'ACL CALIBRATION', then press .
Note the measured value:
• pH = 'X.X'
- If the value is greater than 8.2 or less than 6.4: the sensor is dirty or has been damaged during transport. Clean the pH
sensor (see § 4.1) then repeat the above steps. If the problem persists, contact your reseller.
- If the value is between 6.4 and 8.2, press to begin calibraon. The procedure takes about 15 seconds.
- When calibraon is nished, check that the value displayed equals 7.5, otherwise repeat the calibraon.
• ACL = 'XXX'
- Start the calibraon procedure by pressing ; the procedure lasts about 15 seconds,
- If the value is 700: calibraon is correct
- If the value is not 700: repeat the calibraon steps. If the problem persists, contact your reseller.
• Press or wait 30 seconds to exit.
3.4 Adjusng the set point(s)
The set point is displayed connuously on the LCD home screen.
The default seng for the pH set point is pH7.2 (TRi pH and TRi PRO modules).
The default seng for the ACL set point is 4 (TRi PRO module).
This value provides the ideal compromise to achieve opmum eciency in terms of water disinfecon.