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Thread: Salt probe calibration

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    Regular Vistor Asco1104's Avatar
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    Salt probe calibration

    Hi I recently bought a used 2016.

    I watched a couple of videos and they conflict like most things in this hobby.

    How long should I let the probe dry for 2 or 24hrs?

    It has settled on 73 but I havnt put it in the calibration solution yet. Itís warming in the tank water now.

    Is auto or manual better?

    Any other tips for the next step?

    Thanks
    Tim

  2. #2
    Frequent Contributor zombie's Avatar
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    This is what I do and I consider best practice for the cond probe. I have yet to hear a single user that this didn't work perfectly for. Set temp compensation to 2.2 and you can adjust that later if you see oscillations in reading due to temp.

    1. (Only applies for first calibration) leave in tank uncalibrated for up to one week (mine took 4 days) until the reading stabilizes to the same reading as the previous day at the same temperature (oscillations during the day are expected as temp changes in this step).

    2. Float calibration packet in tank or sump to get it up to tank temp for 30 minutes.

    3. Remove the probe from the tank, lightly rinse with RO and pad dry with a paper towel. Drying for multiple hours will not help the calibration.

    4. Complete the dry step

    5. Place the probe in the calibration solution for 5 minutes and make sure it's touching tank water so it doesn't cool down (I use 2 magnets for this).

    6. Complete the wet step.

    7. Verify all went well by checking that RODI water reads near 0 and the packet reads 35. If off by any significant margin, repeat steps 3-6.

    You might be an engineer if...You have no life and can prove it mathematically.

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    Regular Vistor Asco1104's Avatar
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    Hi Zombie
    I have tried 4 times now and the highest I can get is 32 the other times have been about 28.

    On the last step do I wait 5 mins even if it still goes up and down by 3-4?
    Tim

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    Frequent Contributor zombie's Avatar
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    Quote Originally Posted by Asco1104 View Post
    Hi Zombie
    I have tried 4 times now and the highest I can get is 32 the other times have been about 28.

    On the last step do I wait 5 mins even if it still goes up and down by 3-4?
    If the number is still changing you can go longer for better accuracy. 5 minutes usually works for me though.

    You might be an engineer if...You have no life and can prove it mathematically.

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    Regular Vistor Asco1104's Avatar
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    Ok I will try again in a bit.
    Tim

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    Regular Vistor Asco1104's Avatar
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    Is the a max time it can be left in the calibration fluid?
    Tim

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    Frequent Contributor zombie's Avatar
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    Quote Originally Posted by Asco1104 View Post
    Is the a max time it can be left in the calibration fluid?
    Nope. You could leave it in there for an hour and go do something else if you want.

    You might be an engineer if...You have no life and can prove it mathematically.

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    Regular Vistor Asco1104's Avatar
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    Thanks for the help zombie but I have given up for the night, it read 0.2 in ro but highest it would go is 32ppt but now I have put it back in tank water it is reading 34ppt
    Tim

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    Regular Vistor Asco1104's Avatar
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    Tried twice more this morning, still reads 32 in calibration solution but reads 34 when in tank water, Reading is stable.
    Have I got a worn probe or a duff solution?

    Calibrated ph probe this morning and that worked first time.
    Tim

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    Hi all , have tried this but mine is still reading in the 70s ! Losing the the will !


    Sent from my iPhone using Tapatalk

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    Frequent Contributor zombie's Avatar
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    Quote Originally Posted by DANDALEH View Post
    Hi all , have tried this but mine is still reading in the 70s ! Losing the the will !


    Sent from my iPhone using Tapatalk
    I'm pretty sure 70s means an open or short (I forget which).

    You might be an engineer if...You have no life and can prove it mathematically.

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    Regular Vistor Asco1104's Avatar
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    Any thoughts on my trouble with my probe? Itís been at 34 +-2 all day
    Tim

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    Frequent Contributor zombie's Avatar
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    Quote Originally Posted by Asco1104 View Post
    Any thoughts on my trouble with my probe? Itís been at 34 +-2 all day
    34 is likely correct. The +-2 temp just means you need to tune the temp compensation. You did enable that prior to calibration right?

    You might be an engineer if...You have no life and can prove it mathematically.

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    Regular Vistor Asco1104's Avatar
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    Quote Originally Posted by zombie View Post
    34 is likely correct. The +-2 temp just means you need to tune the temp compensation. You did enable that prior to calibration right?

    You might be an engineer if...You have no life and can prove it mathematically.
    Sorry I will write that again.

    Probe calibrated to 0.2 in ro and 32 in calibration fluid. I have tried about 10 times now and itís always near or just over 32 so I gave up this morning and just put it back in the tank.

    Itís been reading 34ppt +or- 2 all day.

    Set temp compensation to 2.2% as you advised me in a earlier post.

    I canít understand why I canít get it to calibrate to 35, but itís calibrated to 32 and reads 34 ppt in the tank.
    Tim

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    Frequent Contributor zombie's Avatar
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    Quote Originally Posted by Asco1104 View Post
    Sorry I will write that again.

    Probe calibrated to 0.2 in ro and 32 in calibration fluid. I have tried about 10 times now and itís always near or just over 32 so I gave up this morning and just put it back in the tank.

    Itís been reading 34ppt +or- 2 all day.

    Set temp compensation to 2.2% as you advised me in a earlier post.

    I canít understand why I canít get it to calibrate to 35, but itís calibrated to 32 and reads 34 ppt in the tank.
    It's possible that the probe calibration is hitting some sort of wall and needs to be reset. I know there is a process to do so, but I never did it myself and don't remember what it is.

    You might be an engineer if...You have no life and can prove it mathematically.

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    Regular Vistor Asco1104's Avatar
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    Quote Originally Posted by zombie View Post
    It's possible that the probe calibration is hitting some sort of wall and needs to be reset. I know there is a process to do so, but I never did it myself and don't remember what it is.

    You might be an engineer if...You have no life and can prove it mathematically.
    Is there a contact me option at Neptune so I can ask?
    Tim

  17. #17
    Frequent Contributor zombie's Avatar
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    Quote Originally Posted by Asco1104 View Post
    Is there a contact me option at Neptune so I can ask?
    You can send a ticket with the question and they will email you back. Probably won't be till tomorrow to get a response though.

    You might be an engineer if...You have no life and can prove it mathematically.

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    Quote Originally Posted by zombie View Post
    I'm pretty sure 70s means an open or short (I forget which).

    You might be an engineer if...You have no life and can prove it mathematically.
    Thanks , so that means there's a fault with the probe ?


    Sent from my iPhone using Tapatalk

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    Frequent Contributor zombie's Avatar
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    Quote Originally Posted by DANDALEH View Post
    Thanks , so that means there's a fault with the probe ?


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    Either that or the connection isn't clean or solid. I would try cleaning and reseating to rule that out.

    You might be an engineer if...You have no life and can prove it mathematically.

  20. #20
    Regular Vistor Asco1104's Avatar
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    Quote Originally Posted by zombie View Post
    You can send a ticket with the question and they will email you back. Probably won't be till tomorrow to get a response though.

    You might be an engineer if...You have no life and can prove it mathematically.
    Thanks I sent a ticket and got a reply.

    You disconnect the conductivity probe from the base unit and carry out manual calibration.
    Check the scale reads 10ec and offset reads -13

    Then reboot the base unit then plug the probe back in once itís rebooted.

    Carry out calibration.

    Hopefully that will work but I need to get another calibration solution before I can do it.

    Thanks for the help.
    Tim

  21. #21
    Regular Vistor Asco1104's Avatar
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    The above solved my problem and it calibrated first time.
    Tim

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