Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 8 of 8

Thread: Simulating a salt level to test tri-sensor

  1. Back To Top    #1

    Simulating a salt level to test tri-sensor

    I'm getting a very erratic salt reading from my pool pilot. Inspected and cleaned the tri-sensor and verified a good cable by checking pin to pin continuity and no continuity between pins.

    Yesterday the reading said 500 ppm, then later it showed 7800ppm. After checking out the sensor and cable I tried to calibrate it to the actual salt level of 2000 (I know that's low) but it would not take the calibration.

    It seems that I need to troubleshoot to find whether the problem is the sensor or the control board.

    At one point the service guy plugged a simulator into the tri-sensor cord. Can I simulate a salt level by placing a resistor between two of the cable pins?

    Thanks much,

  2. Back To Top    #2

    Join Date
    Oct 2007
    Location
    Valrico, FL
    Posts
    536

    Re: Simulating a salt level to test tri-sensor

    Yes you can, but the problem is what value to use? If you have an ohm meter, you might try to measure the resistance acros the pins with the sensor in the water. That would probably give you a ball park figure.
    7,500 gal, IG pool, L shape 22' x 15', 1.5 hp pump, cartridge filter, AquaPlus SWG/Controller, Pebble-Tec liner.

  3. Back To Top    #3

    Re: Simulating a salt level to test tri-sensor

    I'd like to know what resistance would simulate 3000 ppm, for example. Then I could put that resistor between the right pins and see if my unit displays 3000ppm. That would tell me which is bad, sensor or board, right?

  4. Back To Top    #4

    Join Date
    Oct 2007
    Location
    Valrico, FL
    Posts
    536

    Re: Simulating a salt level to test tri-sensor

    No way of really knowing that. It depends on the surface area of the probes, the distance apart and also possibly the probe material themselves.
    7,500 gal, IG pool, L shape 22' x 15', 1.5 hp pump, cartridge filter, AquaPlus SWG/Controller, Pebble-Tec liner.

  5. Back To Top    #5

    Join Date
    Apr 2007
    Location
    Ft Lauderdale, Florida
    Posts
    1,455

    Re: Simulating a salt level to test tri-sensor

    169 ohm (1%) is approx 2400 ppm... but don't tell anyone you heard that from me.

    Edited because I forgot to address the initial problem:

    Eratic readings like that may be because you have insufficient flow going through the manifold ( that is, low flow conditions may not allow the proper water conductivity between the salt sensor blades), a bad connector (remove the trisensor cord from the DIG and make sure the pins in the connector are all evenly spaced from the top of the plastic housing), bad internal connection (inspect the wire harness between the two circuit boards for any loose wire), or a bad display circuit board.

    Naturally, if it's under warranty still, call the factory for service.
    Sean Assam - Sean@teamhorner.com
    National Accounts and Commercial Products Manager
    AquaCal Heat Pumps www.aquacal.com
    AutoPilot Salt Chlorine Generators www.autopilot.com

  6. Back To Top    #6

    Re: Simulating a salt level to test tri-sensor

    Thanks a lot!

    Now I just need to figure out which two of the six pins are for salt...

  7. Back To Top    #7

    Join Date
    Apr 2007
    Location
    Ft Lauderdale, Florida
    Posts
    1,455

    Re: Simulating a salt level to test tri-sensor

    try this
    Attached Files Attached Files
    Sean Assam - Sean@teamhorner.com
    National Accounts and Commercial Products Manager
    AquaCal Heat Pumps www.aquacal.com
    AutoPilot Salt Chlorine Generators www.autopilot.com

  8. Back To Top    #8

    Re: Simulating a salt level to test tri-sensor

    Great! Thanks much, Sean!

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •