pH control requires the pH (or pH+ORP) sensor.
pH is automatically measured 15 minutes after the end of each filtration cycle. The updated pH is displayed immediately. If only one
filtration cycle is set, the pH is measured automatically once per day; if both filtration timers are set, pH is measured automatically
twice per day.
pH can be measured at any time by first stopping the filtration pump, and then selecting MEASURE PH in MANUAL CONTROL
menu. Filtration and water circulation is stopped to prevent static electricity affecting the accuracy of the pH measurement. It is
recommended to wait 15 minutes after stopping the pump prior to measuring pH to allow static to completely discharge.
pH information is used for pH control functions and Alerts. However, independent pH control systems can be installed with the
PoolCop. In this case PoolCop can be used to measure pH and trigger Alerts if the pH is out of the normal range.
pH Sensor Calibration
The electrode can be calibrated using pH buffer fluids or liquids of known pH. It is recommended to calibrate pH using an external
buffer liquid or pool water in an isolated container, rather than in the PoolCop itself. This avoids the risk of stray currents in the pool
affecting the calibration sequence.
Calibration procedure is described in the MAINTENANCE MANUAL (procedure SMU_07_EN) downloadable on our internet
website www.PoolCop.com in RESOURCES /DOWLOADS section.
Information and Guidance
The PoolCop has proportional–integral pH Control for dosing; an ON/OFF dosing pump (peristaltic or electromagnetic) and
installation kit is required. pH Control logic and safety:
The dosing is executed once at the beginning of each filtration. It is recommended to program two daily filtration cycles, to
enable two dosing periods per day. Filtration should be stopped at least 30minutes between 2 filtration cycles to
allow pH algorithm to work properly.
Proportional-integral control logic allows for very safe operations and avoids risk of overdosing.
Setting the maximum possible dosing time is a way to adjust control efficiency. Maximum dosing must be adjusted in
accordance with pool volume, water alkalinity and the dosing pump flow rate to provide best results.
The pH Control relay AUX 7 is protected (loss of valve position, pump off securities, etc.) for safety.
As a security, if the measured pH is out of limits (lower than 6.0 or higher than 9.5), pH control is stopped. An Alert
message is displayed prompting for water balance.
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