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Adjusting the Set Point
The pH Set Point is the pH that the Chemigem will adjust your pool water to. You can
adjust the pH Set Point via the pH Menu.
Enter the pH Menu as described above, and press the N/DOWN button when asked
whether you wish to do a manual feed. The LCD will then read "ADJUST SET POINT
Y/N?" Press Y/UP to select this option and then the LCD will display the current set point.
Adjust this using the Y/UP or N/DOWN buttons. Confirm the adjusted set point by pressing
ENT. The new set point will then be displayed on the right hand side of line 3 of the LCD.
Calibration and Re-setting Factory Defaults
If your Chemigem consistently displays a pH reading different from that obtained by
manual testing with a quality test kit, it may be necessary to re-calibrate the multi-electrode
(probe). The instructions below assume the probe is measuring a pH of 7.8.
Caution: do NOT re-calibrate the probe until identical pH readings have
been obtained from at least three tests from around the pool. You will need
to calibrate the probe to the pH value obtained from these test kit results.
Enter the pH menu as described previously and press the N/DOWN button when asked
whether you want to do a manual feed, and then again when asked whether you wish to
adjust the set point.
The LCD will then read "CALIBRATE PROBE?". Press Y/UP to select this option and the
LCD will read "PROBE Ph = 7.8 ADJUST TO +0.0". Use the Y/UP button to increase the
adjusted value to the required level. Press ENT to confirm the adjustment and after a few
seconds the Chemigem will revert to normal operation and the home screen will display the
new pH value.
Adjust pH System On or Off
To disable the pH System (or re-enable it if it has been disabled) you need to access the
pH menu and work your way through the MANUAL FEED, ADJUST SET POINT and
CALIBRATE PROBE questions – pressing the N/DOWN button in response to each
question.
The LCD will then read "ADJUST pH CONTROL TURN OFF? Y/N" (if the system is ON) or
ADJUST pH CONTROL TURN ON? Y/N" (if the system is OFF). If you press Y/UP, the
system will turn on (or off depending on its current status). If you answer N/DOWN to
either question, the LCD will return to the home screen.
Note: Turning off the supply of acid is not normally necessary and could lead to
unbalanced pool water that is unsafe to swim in. Pool Controls recommends that you seek
advice from a qualified professional prior to disabling the pH system – or call Pool Controls
Service on +61 8 9240 4400.
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