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  1. #1
    Join Date
    Apr 2012
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    Ottawa,ont
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    yellow jacket micron gauge 69075

    I tried starting my micron gauge today. It went to 0 right away and 3 seconds later gave me doted lines ---- i was just wondering why its doing that?

  2. #2
    Join Date
    Aug 2014
    Location
    DC suburbs
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    I believe it means that the sensor is bad or there is a problem with the sensor plug not making a good connection. Also try a fresh battery.

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  4. #3
    Join Date
    Dec 2013
    Location
    Maryland
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    Picked up brand new micron gauge today, when I was done using it, removed from circuit and turned it on just for ****s and giggles to see how atmospheric looked. To my dismay, I found that the reading zoomed right down to 600 microns... I left it on and several minutes later it had crept up to 2k microns. Mind you, the sensor had been disconnected from the circuit. I checked to make sure head unit had the correct sensor number in it. Definitely no oil what so ever in the sensor as well. Any suggestions YJ?

    M#69086

  5. #4
    Join Date
    Oct 2012
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    Where we mow our own grass
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    Quote Originally Posted by KellerW View Post
    Picked up brand new micron gauge today, when I was done using it, removed from circuit and turned it on just for ****s and giggles to see how atmospheric looked. To my dismay, I found that the reading zoomed right down to 600 microns... I left it on and several minutes later it had crept up to 2k microns. Mind you, the sensor had been disconnected from the circuit. I checked to make sure head unit had the correct sensor number in it. Definitely no oil what so ever in the sensor as well. Any suggestions YJ?

    M#69086
    Had the micron gauge been exposed to refrigerant?

    If a micron gauge gets exposed to refrigerant they will do that. It's normal. Once the refrigerant clears out it will all be good.

  6. #5
    Join Date
    Nov 2007
    Location
    Mississippi
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    lightly blow across sensor after removing. Should quickly read atmospheric.

    Quote Originally Posted by KellerW View Post
    Picked up brand new micron gauge today, when I was done using it, removed from circuit and turned it on just for ****s and giggles to see how atmospheric looked. To my dismay, I found that the reading zoomed right down to 600 microns... I left it on and several minutes later it had crept up to 2k microns. Mind you, the sensor had been disconnected from the circuit. I checked to make sure head unit had the correct sensor number in it. Definitely no oil what so ever in the sensor as well. Any suggestions YJ?

    M#69086



    Have wrench-Will travel

  7. #6
    Join Date
    Dec 2013
    Location
    Maryland
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    Quote Originally Posted by Mike19 View Post
    Had the micron gauge been exposed to refrigerant?

    If a micron gauge gets exposed to refrigerant they will do that. It's normal. Once the refrigerant clears out it will all be good.
    No, the gauge was isolated from evacuated circuit and removed.

  8. #7
    Join Date
    Dec 2013
    Location
    Maryland
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    Quote Originally Posted by socotech View Post
    lightly blow across sensor after removing. Should quickly read atmospheric.





    Have wrench-Will travel
    Whilst that sounds very interesting, the problem I have is that I rely on my micron gauge to determine whether or not my circuit is properly dehydrated and I can't trust a gauge that won't show an accurate rise when its at atmospheric.... much less attached to the circuit I am evacuating.

  9. #8
    Join Date
    Nov 2007
    Location
    Mississippi
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    yellow jacket micron gauge 69075

    I'm just suggesting to blow any residual refrigerant away from sensor when removed from circuit. This is what I do with mine.

    Quote Originally Posted by KellerW View Post
    Whilst that sounds very interesting, the problem I have is that I rely on my micron gauge to determine whether or not my circuit is properly dehydrated and I can't trust a gauge that won't show an accurate rise when its at atmospheric.... much less attached to the circuit I am evacuating.



    Have wrench-Will travel

  10. #9
    Join Date
    Aug 2011
    Location
    Fuquay varina, nc
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    I have the 69075. I've had it for 3+ years. Love it and couldn't be happier. Original sensor, never fails. I keep it above any potential oil flow (usually the 1/4" charging port on my 4-way titan manifold). After confirming pressure test with nitrogen, I don't hook it up until the pump has been running for at least 30 mins and has quieted down a bit. I keep a bottle of 91% IPA on the truck. If I'm dealing with a nasty system repair, I clean the sensor with IPA immediately afterward while im changing vac oil... But I clean it no less than every 2 evacuations. If I had to guess, I've probly got 100+ hours on the original sensor. I'd buy it again in a second.

  11. #10
    Join Date
    Jul 2018
    Posts
    5
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    If it's exposed to oil/refrigerant, is the alcohol enough to clean it out? Is there a good process for cleaning a very dirty sensor?

  12. #11
    Join Date
    Aug 2011
    Location
    Lewes, DE
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    1,015
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    Quote Originally Posted by pafieldtech View Post
    I have the 69075. I've had it for 3+ years. Love it and couldn't be happier. Original sensor, never fails. I keep it above any potential oil flow (usually the 1/4" charging port on my 4-way titan manifold). After confirming pressure test with nitrogen, I don't hook it up until the pump has been running for at least 30 mins and has quieted down a bit. I keep a bottle of 91% IPA on the truck. If I'm dealing with a nasty system repair, I clean the sensor with IPA immediately afterward while im changing vac oil... But I clean it no less than every 2 evacuations. If I had to guess, I've probly got 100+ hours on the original sensor. I'd buy it again in a second.
    holy cow, 91% IPA! I thought I was hard core drinking 3 Dogfishhead 120s

    Sent from my SM-G965U using Tapatalk

  13. #12
    Join Date
    Nov 2006
    Location
    Athens, Ohio
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    Quote Originally Posted by Gross View Post
    holy cow, 91% IPA! I thought I was hard core drinking 3 Dogfishhead 120s

    Sent from my SM-G965U using Tapatalk
    Speaking which, my blood type is IPA Positive.
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