Chemtrol Pool Controller
Probes
The ORP and pH probes are said to be rated for a year of use. In reality, they will probably last longer. Probes should be replaced when readings do not align with those from the chemical test kit.
The Chemtrol branded probes are quite expensive. We have had good success with probes from Sensorex (cost is about 75% less than those from Chemtrol):
- pH5000 Polycarbonate Swimming Pool pH Sensor ($56 as of May 2020)
- ORP1000 Polycarbonate Laboratory ORP Sensor ($86 as of May 2020)
Procedures
Enabling or Disabling the Chlorinator
The chlorinator is controlled by the Chemtrol unit. The instructions below assume that the Chemtrol unit is operating, and that the main screen is visible.
- Press the up or down arrow until the ORP readout is highlighted.
- Select the ORP sub-menu by pressing the right arrow.
- The first item in the ORP sub-menu selects the feed mode. Press the right arrow to change the mode.
- Press the up arrow until the ORP feed mode is AUTO to enable or OFF to disable.
- Press the left arrow twice to return to the main screen.
On the main screen, an "A" to right of the ORP reading indicates that the chlorinator is enabled (automatic control), "X" indicates it is disabled.
Enabling or Disabling the Acid Pump
The acid pump is controlled by the Chemtrol unit. The instructions below assume that the Chemtrol unit is operating, and that the main screen is visible.
- Press the up or down arrow until the pH readout is highlighted.
- Select the pH sub-menu by pressing the right arrow.
- The first item in the pH sub-menu selects the feed mode. Press the right arrow to change the mode.
- Press the up arrow until the pH feed mode is AUTO to enable or OFF to disable.
- Press the left arrow twice to return to the main screen.
On the main screen, an "A" to the right of the pH reading indicates that the acid pump is enabled (automatic control), "X" indicates it is disabled.