SWG and Taylor’s aren’t matching

[TeenaTeens]

Hi I’m not sure what to do. My Hayward t-15 cell is not measuring the same as my Taylor’s test. I’ve done the test repeatedly. Taylor’s is coming in at 2800 while Hayward is telling me I’m at 3265.

Should I be worried? Can I fix this discrepancy? If so how? Which is right? And finally should I add more salt. It’s producing chlorine just fine.

 

[red-beard]

Is the Hayward a Standalone system (Aqua-Rite) or a Goldline Automation system?

I have the Standalone system and this is how to calibrate

Obviously ignore the use of Test Strips! Use the Taylor test. I check/recalibrate about once per year.

And this is How to do the Prologic/Aqualogic

 

[TeenaTeens]

Ok it’s the aqua rite. I’ll do it tomorrow. Was scared to do it…

 

[TeenaTeens]

Is the Hayward a Standalone system (Aqua-Rite) or a Goldline Automation system?

I have the Standalone system and this is how to calibrate

Obviously ignore the use of Test Strips! Use the Taylor test. I check/recalibrate about once per year.

And this is How to do the Prologic/Aqualogic

I have the Omni logic - does that make a difference?

 

[TeenaTeens]

I have the Omni logic - does that make a difference?

Honestly I don’t know what system I’ve got. I’ve only noticed the Omni logic. I’ll have to go check. The Omni logic has instructions for resetting average salt but not calibrating it.

 

[TeenaTeens]

Honestly I don’t know what system I’ve got. I’ve only noticed the Omni logic. I’ll have to go check. The Omni logic has instructions for resetting average salt but not calibrating it.

 

[TeenaTeens]

It’s the Omni logic. Others have said not to worry about the discrepancy. I’ll see about resetting it and where I’ll land. Once I know how to do it that is.

 

[markayash]

Go by the Taylor kit, The swg is just doing a calculated estimate off the power the cell is using.
But most units have a wide range from 3000 to 4500 so don’t worry too much

 

[duraleigh]

.It’s producing chlorine just fine.

Time to dust off the old adage......If it ain't broke, don't fix it

 

[TeenaTeens]

Go by the Taylor kit, The swg is just doing a calculated estimate off the power the cell is using.
But most units have a wide range from 3000 to 4500 so don’t worry too much

Does Taylor’s measure average or instant salt level?

 

[jedigrover]

The Hayward systems do not "calibrate". All that procedure does is wipes out the average reading & data that went into it and saves the "Instant Salt" (the instantaneous reading) as the new "average" and starts building a new average off of that. It is handy if you make a big adjustment to the salt. But it doesn't calibrate the cell in any discernible way. If it were doing a calibration, you'd have to give it more than 1 sample to look at. The salt reading from the unit is computed from Volts, Amps, and Temperature. It does not have an independent temp-compensated conductivity probe. It is possible that the temperature of the water is causing some of the difference. It is also likely that if the cell is worn somewhat, it will measure lower. Also, the view of the water that the cell is getting is a little different than a sample taken. Almost 500ppm is a bit large of a discrepancy, so my guess is that the cell is wearing a bit. It will read lower than true over time as it ages. That's why it's important to take an independent measure--so you don't add too much salt thinking the cell was telling the truth.

 

[markayash]

Does Taylor’s measure average or instant salt level?

The Taylor will tell you what your level is at the time of the test.
Couldn't hurt to add a bag or 2 of salt ( not sure what size your pool is ) and get it up to around 3500.

 

[TeenaTeens]

The Hayward systems do not "calibrate". All that procedure does is wipes out the average reading & data that went into it and saves the "Instant Salt" (the instantaneous reading) as the new "average" and starts building a new average off of that. It is handy if you make a big adjustment to the salt. But it doesn't calibrate the cell in any discernible way. If it were doing a calibration, you'd have to give it more than 1 sample to look at. The salt reading from the unit is computed from Volts, Amps, and Temperature. It does not have an independent temp-compensated conductivity probe. It is possible that the temperature of the water is causing some of the difference. It is also likely that if the cell is worn somewhat, it will measure lower. Also, the view of the water that the cell is getting is a little different than a sample taken. Almost 500ppm is a bit large of a discrepancy, so my guess is that the cell is wearing a bit. It will read lower than true over time as it ages. That's why it's important to take an independent measure--so you don't add too much salt thinking the cell was telling the truth.

Interesting. The salt cell is new. The average salt reading is much closer to the Taylor’s reading. Is that what I should by comparing?

 

[TeenaTeens]

The Taylor will tell you what your level is at the time of the test.
Couldn't hurt to add a bag or 2 of salt ( not sure what size your pool is ) and get it up to around 3500.

They told me 3200 was perfect. 2800-3400 is the range. Both readings are within this. So I think I’m gonna leave good enough alone…

 

[TeenaTeens]

The Taylor will tell you what your level is at the time of the test.
Couldn't hurt to add a bag or 2 of salt ( not sure what size your pool is ) and get it up to around 3500.

So it measures the instant salt? Not the average. If that’s the case that makes much more sense and matches closer…

 

[markayash]

They told me 3200 was perfect. 2800-3400 is the range. Both readings are within this. So I think I’m gonna leave good enough alone…

Only issue in running the low end is if you get a lot of rain and have to drain some water out. Your salt level can drop too low but will usually give a low salt light and you just add more.

 

[TeenaTeens]

Only issue in running the low end is if you get a lot of rain and have to drain some water out. Your salt level can drop too low but will usually give a low salt light and you just add more.

Yes all good points. More to think about.

 

[red-beard]

The Taylor will tell you what your level is at the time of the test.
Couldn't hurt to add a bag or 2 of salt ( not sure what size your pool is ) and get it up to around 3500.

That is too high for Hayward. The Hayward system is nominally 3000 ppm and operates 2700 ppm to 3200 ppm.

The Hayward system uses the displayed reading to decide whether the salt level is too low. If the reading is off by 500, the Hayward system will try to make chlorine at "2700" when the actual is 2200 ppm. I "re-calibrate" the display value yearly and use the value from the display for my weekly reading for Pool-Math

 

[markayash]

That is too high for Hayward. The Hayward system is nominally 3000 ppm and operates 2700 ppm to 3200 ppm.

The Hayward system uses the displayed reading to decide whether the salt level is too low. If the reading is off by 500, the Hayward system will try to make chlorine at "2700" when the actual is 2200 ppm. I "re-calibrate" the display value yearly and use the value from the display for my weekly reading for Pool-Math

Thanks, I thought they all were about the same.

 

[TeenaTeens]

That is too high for Hayward. The Hayward system is nominally 3000 ppm and operates 2700 ppm to 3200 ppm.

The Hayward system uses the displayed reading to decide whether the salt level is too low. If the reading is off by 500, the Hayward system will try to make chlorine at "2700" when the actual is 2200 ppm. I "re-calibrate" the display value yearly and use the value from the display for my weekly reading for Pool-Math

How do you recalibrate? I cannot find instructions for my Omni logic