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Thread: COR interaction with optical sensors?

  1. #1
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    COR interaction with optical sensors?

    I received my COR20 yesterday and got it installed last night, using the COR Task on Fusion. It went fine, but shortly after that I got an alert that an optical sensor in the sump was closed/submerged. Went down to check and all appeared well. Tried wiping off the sensor - no change. Unplugged it from the FMM and it still was reading closed, even though it should have been absent. Tried updating firmware and doing a soft reboot with no change. I finally unplugged the aquabus cable and rebooted the FMM that way and it fixed the problem.

    I thought it was a one-time thing, but then today a similar issue happened and a different optical sensor was ‘stuck’ on, even though it was clearly out of water. This time the issue resolved itself without more intervention.

    Both of these sensors are installed horizontally and have been working for several weeks without any issues at all. The only other point to note was that when I installed the COR, I unplugged the aquabus cable from the Apex and plugged it into the COR (with the COR then being plugged into the Apex)

    Has anyone else noticed issues like this?

  2. #2
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    Do you have auto-detect turned enabled or disabled for the port that the OS-1 is connected to? If you have auto-detect turned ON, turn it off and I link your problem will be solved.
    Jon

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    Thanks for the suggestion - I already had autodetect turned off. (I did go to the configuration page and verified that all the inputs were still set to the appropriate sensors)

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    I have a FFM with multiple OS-1s connected. Where do I access auto-detect?

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    Quote Originally Posted by jamesreich View Post
    I have a FFM with multiple OS-1s connected. Where do I access auto-detect?
    On the module page.

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

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    Thanks

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    Not sure if it helps, but i am presently trying to figure out a weird issue with a 1 inch flow sensor. My working theroy is that the cor power lines can produce cross talk in the sensor line that confuses the FMM. My flow sensor is jumping up the 9k gallons an hour in a 32 gallon cube.

    I am still in the probelm isolation phase, so please dont put much weight in my “hunch” (i am a computer geek, and we always think its the cable), but is there a chance that your optical cabeling is running next to your core cables?

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    Quote Originally Posted by Scriptkitty View Post
    Not sure if it helps, but i am presently trying to figure out a weird issue with a 1 inch flow sensor. My working theroy is that the cor power lines can produce cross talk in the sensor line that confuses the FMM. My flow sensor is jumping up the 9k gallons an hour in a 32 gallon cube.

    I am still in the probelm isolation phase, so please dont put much weight in my “hunch” (i am a computer geek, and we always think its the cable), but is there a chance that your optical cabeling is running next to your core cables?
    That is definately more than just a hunch. It is well known that the magnetic field induced from current passing through a wire can induce a current in a parallel wire that will affect analog signals. This applies for flow sensors, conductivity probe, pH/ORP, etc.

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

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    Would having the wires shielded work instead of separating the wires?

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    Quote Originally Posted by jamesreich View Post
    Would having the wires shielded work instead of separating the wires?
    If you shield and tie only one end into an earth ground yes.

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

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