Accuracy Test on U2s (automatics in general)

Thread: Accuracy Test on U2s (automatics in general)

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  1. #1
    Member suburude's Avatar
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    Accuracy Test on U2s (automatics in general)

    I was just wondering if there is a standard way to test accuracy on U2s (autos) I wear mine to bed at night! (an old habit coming from the Viet Nam war) . 24 hrs a day basically.
    When tsting accuracy should I not wear it to bed? Should I place it in face down position while sleeping. Then wear it for a week or so then check its accuracy? Is there a standard for checking? Thanks! Jim

  2. #2
    Member suburude's Avatar
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    Re: Accuracy Test on U2s (automatics in general)

    Also another question should I wind it every day?? Jim



    Quote Originally Posted by suburude
    I was just wondering if there is a standard way to test accuracy on U2s (autos) I wear mine to bed at night! (an old habit coming from the Viet Nam war) . 24 hrs a day basically.
    When tsting accuracy should I not wear it to bed? Should I place it in face down position while sleeping. Then wear it for a week or so then check its accuracy? Is there a standard for checking? Thanks! Jim

  3. #3
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    Re: Accuracy Test on U2s (automatics in general)

    When testing the accuracy of your watch, you should test it the way you wear it so it will indicate the accuracy for you and your lifestyle. Synchronize it with a free atomic clock which can be downloaded off the net.

    If you aren't really active with your watch, you may want to wind it. I tend to be quite active with my arms and the U2 tends to never wind down. I do, every once in a while let my U2 run down and then fully manually wind it, or close to full manually wind it, incase there's a problem with the winding of the mainspring due to rough activity. Sometimes, your accuracy could change. This will set it right again.

    Hope this helps.

    Tim

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  5. #4
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    Re: Accuracy Test on U2s (automatics in general)

    Tim makes a good point here. I wear mine every day and wind it once in a while, just makes sense to check the function of the crown on occasion.

    For everyday accuracy checks i was using the clock on my computer
    but then i downloaded the sinn screen saver and use it now. i check it first thing in the morning and it has been within a few seconds +- since.

    How cool is it to have a sinn to check the accuracy of your sinn?

    DirtVictim

  6. #5
    Member Denizen's Avatar
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    Re: Accuracy Test on U2s (automatics in general)

    the first series of accuracy tests are done with the usual wear pattern that you do for your typical watch, ie. if you are used to wearing the watch to bed, then wear the watch to bed. if you typically take the watch off and put it down or on a winder, do the same for the U2.

    there are many factors which affect accuracy - temperature, rest position, amount of rest, use of winders and how long it is on a winder, etc. the idea is you want to see how accurate the watch is during your normal routine and then fine-tuning/changing that so you can achieve better accuracy without having to send the watch in to get regulated.

    if you wear the watch to bed and depending on how active your wrist is during the day, you may not need to manually wind the watch if this is your everyday watch. again, you'll be able to tell only by wearing it.

    i personally don't like to manually wind watches with screw-in crowns because you always have to unscrew the crowns and the less often you have to do that, the less likely you will strip the threads (which would affect the watch's WR). for any given month, i generally rotate the diver watches that i will be wearing on my 2 winders so they'll be properly powered.

    Quote Originally Posted by suburude
    I was just wondering if there is a standard way to test accuracy on U2s (autos) I wear mine to bed at night! (an old habit coming from the Viet Nam war) . 24 hrs a day basically.
    When tsting accuracy should I not wear it to bed? Should I place it in face down position while sleeping. Then wear it for a week or so then check its accuracy? Is there a standard for checking? Thanks! Jim

  7. #6

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    Re: Accuracy Test on U2s (automatics in general)

    Hi,

    here are some statements, all from german forums:

    1. The constant accuracy you get only after wear-in (wear a new watch 6 - 10 weeks)

    2. Every check is only personally for you and your watch in your envirement and for your wear conditions. Watch owners can compare her accuracys, but it is not a real and objective compare.

    3. If you own more watches you want to ask for "running or not". This is a big question, in german forums too. All (real) specialists say, modern watches (not vintages) with actual oil filling can be better stored without working, cause there is no figuratively / tear. A watch mover makes only sense for watches with much complicated functions.

    4. For automatic watches is self winding first choice. If the watch is off you can wind it (round about 50 turns) or - if you go for activities, you shake the watch shorten and it will be self winding enough by movement. After 3 hours of heavy moving (not desktop work) the watch is very fine winded up.

    5. An objective test for accuracy is a machine, named time balance (sorry, translated by me). Every watchmaker had it and here you can see exactly the accuracy. But only without your activity and movement.


    cheers
    U2inSpe

    :oops: I feel many mistakes in my english... sorry.

  8. #7
    Moderator Emeritus Crusader's Avatar
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    Re: Accuracy Test on U2s (automatics in general)

    Quote Originally Posted by dirtvictim
    For everyday accuracy checks i was using the clock on my computer
    but then i downloaded the sinn screen saver and use it now. i check it first thing in the morning and it has been within a few seconds +- since.
    While screensaver clocks ususally feed off the computer clock, please feel free to post a link! B-)
    Cheers,

    Martin ("Crusader")

  9. #8

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    Re: Accuracy Test on U2s (automatics in general)

    :oops: I forgot:

    The clock into the computer is very, very bad. I prefer to install a proggy, which synchronize automatically and in intervalls from minutes to a server with an atomic time.
    The PC clock will synchronize one times a week! Thats poor.

    cheers
    U2inSpe

  10. #9
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    Re: Accuracy Test on U2s (automatics in general)

    I use World Time Server's Atomic Clock Sync. I can ping at any time to get the exact correct Atomic time. I keep it on my desktop and it works well for me.

    When I'm on the road, I take my Casio MTG-950 waveceptor digital with me. It receives a signal from Fort Collins Colorado 4 times a night and synchronizes....without fail, even from inside a gym bag. I use that for correcting the time on my mechanicals.

  11. #10
    Member dmcutter's Avatar
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    Re: Accuracy Test on U2s (automatics in general)

    Don't worry about your English. It's better than most American's German.

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