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Volt Meter For Irrigator

Discussion in 'Irrigation' started by ed2hess, Dec 9, 2012.

  1. 1idejim

    1idejim LawnSite Fanatic
    Posts: 8,810

    Are you asking me Bernie?
    Posted via Mobile Device
     
  2. bcg

    bcg LawnSite Bronze Member
    from Tx
    Posts: 1,836

    Whoever answers but you're probably more qualified than most to do so, Jim.
     
  3. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 21,593

    Bingo: it's clock, amperage (typically .25 amps) and ohms. Depending on the solenoid, as brother Jim already said, it will be between 20 to 60 ohms. I've had many solenoids show good until they heat-up and fail. Bottom line, is a short is when the measured resistance is below 20 ohms for a single solenoid. Above 60 ohms will indicate a open when measuring the field wiring. :)
     
    Last edited: Dec 10, 2012
  4. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,415

    the fact that there's a Harbor Freight clamparound for less than 20 bucks that does the solenoid current readings without needing any slack wire to make extra turns with, means there must be something comparable in the realm of real measuring devices
     
  5. ed2hess

    ed2hess LawnSite Fanatic
    Posts: 12,953

    I am not into measuring current on selenoids but I do use meter for measuring resistance at the controller. And for that I need a good clamp on device.....sears one is poor. I want a hard wire running from the plug on the meter to the clamp on with no slip fit devices in between. I dont want to be guessing whether their is a open in my meter lead goofing up my measurements.
     
  6. bcg

    bcg LawnSite Bronze Member
    from Tx
    Posts: 1,836

    True but...depending on the controller, up to 200 ohms may still function without problem. Sometimes they ohm "high" but still work fine. They almost never ohm "low" and still work though.
     
  7. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 21,593

    That could well be true, and why I prefer to spec clocks that measure amperage, which will get me started to the heart of the problem.
     
  8. greenmonster304

    greenmonster304 LawnSite Gold Member
    Posts: 3,013

    I think this is the norm for your average tech. I will admit that before I came on this site 6 or so years ago I only knew the basics because the guy who taught me only knew the basics.
    Posted via Mobile Device
     
  9. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 21,593

    Now you know "basics" don't mean squat! :)
     
  10. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,415

    just help yourself to the cornucopia of swell advice here, and you'll have everything covered from squat to diddlysquat :p
     

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