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Thread: Goldline Salt level reading way low

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    Join Date
    May 2010
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    Houston, TX
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    Goldline Salt level reading way low

    I had the same issue with my Goldline Salt Cell. It was reading way low. It said 2000 ppm and when I had the water tested (at 3 different stores) it was 4500 - 4700 ppm. The cell was 5 years old and I was informed by Goldline that it was probably failing. I took it into Leslies and they tested it and it failed. So, I bought a new one. Now for the new set of problems.

    Our pool (installed by the previous home owners) has the equipment about 35 feet from the control panel. The salt cells only come with a 15 or 25 foot cord. When the original cell was installed, they spliced the cord and lengthened it with some Cat5 cable. It worked fine for 5+ years. I bought a new cell and spliced it into the old Cat5 that remained from the old cell. The control panel wouldn't recognize the cell! I thought I just purchased a new cell that wasn't good, spliced the cable and now couldn't return it. So, I spliced the original 15' of cable back together and headed to Leslies to have it tested. It passed just fine. So, I went home and spliced it again using new Cat5 wire that I purchased. The cell is reading low again (2500 this time). At this point, I thought the board was bad. I called out a pool tech to check it out. He said the board was fine and he suggested that my length of Cat5 cable could be too long and is messing the reading (too much resistance on the line?). I am not an electrician by any means and don't know if that might be the case or not. I shorted the Cat5 length by 10 feet and it now reads 4400.

    I have been messing with this for almost 3 weeks. I had to put a floating chlorine dispenser in the pool temporarily to try and keep the levels right. And, a couple of times I had to scrub the pool as algae started to form (which I've never had to do in 3 years). The people at Leslies think I'm crazy because I've been in there 3 times to test my Frankenstein Salt Cells with their splices hanging out. I am thrilled to have it working and had to tell someone the story who might get it. My wife doesn't understand it at all. Also, I learned a lot about pool maintenance/care during this time reading these forums - thanks.

    Matt

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    mas985's Avatar
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    Re: Calibrating a Goldline Aqualogic SWG

    What you are describing actually sounds reasonable but I am surprised it ever worked unless they used parallel connections. The problem with CAT5 is that it is not really made for high current. It uses 24 gauge wire which has almost 1 ohm of resitance in 10'. A Goldline SWG requires up to 8 amps of current @ 25v which is about 3 ohms of resitance. So adding 1 ohm to 3 ohms will have a significant impact on the current draw and the salt reading and easily explains the lower salt readings.

    If you need an extension, you might be better off using a larger diameter wire (14 gauge) for at least the power supply leads to minimize the extra resistance.

    [EDIT] 0.8 ohms in 10' of 24 gauge not 8 ohms. Forgot the decimal point.
    Mark
    Hydraulics 101; Pump Ed 101; Pump and Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, 1/2 HP 2sp pump, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    Mod Squad Bama Rambler's Avatar
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    Re: Calibrating a Goldline Aqualogic SWG

    Even if they paralleled all 4 cat5 pairs you'd still be borderline. As Mark said, go with at least 14awg wire. I'm constantly amazed at what some people do and get away with (not you tooslo, the people before you).
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
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    mas985's Avatar
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    Re: Calibrating a Goldline Aqualogic SWG

    I realized that I forgot the decimal point in the post above but still, the error in salt reading could be 20-25% by using the CAT5. Add corroded connections and it would be more so it is still a plausible reason.
    Mark
    Hydraulics 101; Pump Ed 101; Pump and Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, 1/2 HP 2sp pump, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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