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Thread: Strange dry cabinet

  1. #1

    Default Strange dry cabinet

    Guys,

    Just bought a digital dry cabinet 1+ weeks ago (almost 2 weeks).
    Set it up to 45RH, and leave it on 24/7.

    Strangely, it is up and down between 45 and 46. Never stays on 45. And I opened only once in those week. Is this normal? I thought it only needs 3 days and it will go to 45, stays there until we open the cab which wet air comes into the cab.

    Please advise.

    Thanks

  2. #2
    Member eosandy's Avatar
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    Default Re: Strange dry cabinet

    Quote Originally Posted by joker134 View Post
    Guys,

    Just bought a digital dry cabinet 1+ weeks ago (almost 2 weeks).
    Set it up to 45RH, and leave it on 24/7.

    Strangely, it is up and down between 45 and 46. Never stays on 45. And I opened only once in those week. Is this normal? I thought it only needs 3 days and it will go to 45, stays there until we open the cab which wet air comes into the cab.

    Please advise.

    Thanks
    Situation normal. You could be closer to 46 than you think but these things will have 2% accuracy at very best. Could be 47 or 43 unless your meter is calibrated annually.
    Learning DSLR control http://stormtrigger.blogspot.com/

  3. #3

    Default Re: Strange dry cabinet

    So, should I set it to a lower level? or just leave it like this is okay?

  4. #4
    Moderator ziploc's Avatar
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    Default Re: Strange dry cabinet

    It's normal lar brother! When the humidity in your cabinet exceeds the set value the desiccator will turn on and when the humidity reaches the set value it will turn off. That's why you see the fluctuation. You worry too much.

  5. #5

    Default Re: Strange dry cabinet

    Quote Originally Posted by ziploc View Post
    It's normal lar brother! When the humidity in your cabinet exceeds the set value the desiccator will turn on and when the humidity reaches the set value it will turn off. That's why you see the fluctuation. You worry too much.
    Haha.
    I thought it's best if I ask around, rather than have to spend money to fix my lens or my body
    Thanks ziploc

  6. #6
    Moderator ed9119's Avatar
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    Default Re: Strange dry cabinet

    what are you measuring with ? needle or electronic hygrometer?

    if using needle type, use it as decoration and nothing more.... get a regular electronic hygrometer from DIY, Mustafa etc etc between $20-45 .... much more accurate reading

    46-47 range in RH is fantastic control already.... in fact its very difficult to maintain so steady tight range.... I suspect your hygro is out or stiff (if needle type)

  7. #7

    Default Re: Strange dry cabinet

    Hi, ed.
    I have no idea, it's just digitally measured inside the cab.
    So should I just put another hygrometer?

  8. #8
    Moderator ed9119's Avatar
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    Default Re: Strange dry cabinet

    oh if its digital then should be more accurate BUT dont know if yours is properly calibrated or not

    if can detach then use the salt test .... google 'check hygrometer salt test' .... and diy the test yourself at home with some simple tools

  9. #9
    Moderator Octarine's Avatar
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    Default Re: Strange dry cabinet

    Don't forget: it's Relative Humidity ... relative to what? Temperature! (Ok, ideally not but that's real world here.) Stop messing about 1%, there is a range given in your camera manual. And regarding accuracy enough is said already.
    EOS

  10. #10

    Default Re: Strange dry cabinet

    I won't worry at all. Even if there's really a fault, it's only 1% anyway.

    But if you really want to be sure, use another hygrometer to check.

  11. #11

    Default Re: Strange dry cabinet

    was thinking of investing in a dry cabi
    din know so troublesome one
    Canon EOS 500D|BG-E5|18-55mm f/3.5-5.6 kit| 50mm f/1.8 II | 17-40mm f/4L | 580EXII
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  12. #12

    Default Re: Strange dry cabinet

    Quote Originally Posted by jekyll69 View Post
    was thinking of investing in a dry cabi
    din know so troublesome one
    only initial setup...once set to your room the environment, can leave it alone.
    You wont see me much less remember me but i am the guy who makes you look good.

  13. #13
    Deregistered shaoken's Avatar
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    Default Re: Strange dry cabinet

    Don't worry about it, it's normal.
    Mine worse, the RH can be between 47%-50%.

    I put it in my bedroom, an air-con room.
    When I off the air-con, the RH goes up. When I on the air-con, the RH goes down.

  14. #14
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    Default Re: Strange dry cabinet

    I used good industrial grade hygrometer regular for site work. Accuracy +/ 3~4% at best. Each of these instrument can buy many dry cabinets, depending on the size.

    it will be stranger to me, if you set at 45% and get get exactly 45% and the 45% is the correct one.

    PLS use such gauges as indicative value - they not good enough as instrument for serious interpretation!!!
    Last edited by swhyge; 9th September 2009 at 08:58 AM. Reason: correction

  15. #15
    Moderator Octarine's Avatar
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    Default Re: Strange dry cabinet

    Quote Originally Posted by jekyll69 View Post
    was thinking of investing in a dry cabi
    din know so troublesome one
    What trouble? Some people can make simple things appear troublesome.
    Read about the two different types of dry cabinet: http://www.clubsnap.com/forums/showthread.php?t=481380
    EOS

  16. #16

    Default Re: Strange dry cabinet

    Quote Originally Posted by jekyll69 View Post
    was thinking of investing in a dry cabi
    din know so troublesome one
    Actually it is not a troublesome. It just took me ~10 minutes to complete first time setup and throw my slr to the cabi.
    And just to tell you, it's a very worthy to invest in a dry cabi, rather than "submit" your lens to clear fungus


    @Octarine: noted. I was just afraid I got a defect cabi. Thanks

    @Blur Shadow, shaoken, swhyge: Thanks.
    Last edited by joker134; 9th September 2009 at 09:24 AM.

  17. #17
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    Default Re: Strange dry cabinet

    Quote Originally Posted by jekyll69 View Post
    was thinking of investing in a dry cabi
    din know so troublesome one
    It's not troublesome at all.

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