Sense & Dispense

[jking3]

Moderator comment - moved from here. We don't recommend ORP

So it sounds like I should change my sense & dispense ORP off, and use a percentage on my omnilogic system- all based on the history and research I have been reading about with ORP settings and getting an optimal setting.

 

[chem geek]

Re: We don't recommend ORP

We were discussing more of why one would not buy an ORP system for a residential pool. You already have one and the motto "if it ain't broke, don't fix it" applies. If you measure your FC and CYA levels (and other parameters) with a proper test kit such as the TFTestkits TF-100 or the Taylor K-2006, then you can set a setpoint for your ORP level at the FC level you want and then see if it holds it properly. If it does, then great. If not, then yes you can turn it off and set percentage dosing instead.

Let us know how it works for you so we can track whether Sense & Dispense ORP is reasonably stable once you set a setpoint for it.

 

[jking3]

Re: We don't recommend ORP

Thanks, Its all new. I do have the k-2006, I plan to test daily and see how the ORP handles it for a few weeks.

Thanks.

J

 

[chem geek]

Re: We don't recommend ORP

Just note that as described in the Hayward Sense and Dispense manual:

Probe Maintenance
The probes must be clean and free from oil, chemical deposits and contamination to function properly. After saturation in pool or spa water, the probes may need to be cleaned on a weekly or monthly basis depending on bather load and other pool specific characteristics. Slow response, increased need to calibrate pH, and inconsistent readings are indications that the probes are in need of cleaning.

To clean the ORP and pH probes, run the Clean Probe Wizard within the Settings Menu on the Aqua Rite Pro or the Maintenance Menu on the Pro Logic. This Wizard will walk the user through the probe cleaning process. Answer the questions when prompted, and follow the instructions for proper cleaning.

To clean the probes without running the Wizard, turn off input power to the Aqua Rite Pro or Pro Logic. Disconnect the probe connectors from the communication box, unscrew the probe and carefully remove them from the Probe Cell. Clean the reference junction (the white ring at the bottom of the probe body) with a soft toothbrush and regular tooth paste. A household liquid dishwashing detergent may also be used to remove any oil. Rinse with fresh water, replace teflon tape on threads and reinstall probes. If properly cleaned probes continue to provide unstable readings or require excessive calibration, the probes should be replaced.

Probe Storage
Exposure to atmospheric conditions will cause the probe tips to dry out. Store the probes with the included plastic probe storage caps if removed from the Probe Cell for more than one hour. If the storage caps have been misplaced, store the probes indi- vidually in small glass or plastic containers with clean water covering the probe tips. Store probes in a location that will not be subjected to freezing temperatures.

So note that they expect that the probes may need to be cleaned weekly or monthly so you'll need to do regular testing to make sure the probes are working well, which sort of defeats their purpose. I suppose if you can get them to be stable for a week or more, then they might be worth it especially since you already have it, but you can see why we don't normally recommend them.

 

[jking3]

Thanks for the feedback!