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  1. #1
    Join Date
    Jul 2010
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    Melbourne
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    Default Optical Pyrometer

    Its the other Bob's fault this time.

    Picked this up today. Meant to be good from 750C to 2900C
    Havent powered it up yet as it takes four D cells, which given its age I think is a good thing.
    First thing I noticed was that the scale didnt seem to work right, while looking at the manaul I noticed the small adjustemt knob was on the left, mine is on the right. Then it dawned on me that someone a long time ago put it back together wrong. Took about an hour to careful lever off the front and the gasket was stuck to both faces. Now the scale seems to work right Though it could have be a sign of someone "giving up on it"

    The optics work and the filliment is still there(though its still anyones guess whether it still works or not)

    It doesnt seem to be the best type for molten metals(there is another model with a different emissivity factor)

    Anyone know that the fliud filled glass tubes are?

    Would a 6VDC supply do the job?(I'm thinking not unless its a very stable 6V)

    I'll scan the manual tomorrow if anyone cares.

    Stuart
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    Last edited by Stustoys; 16th Sep 2013 at 10:22 PM. Reason: spelling

  2. #2
    Join Date
    Nov 2007
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    Near Rockhampton
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    270

    Default

    Quote Originally Posted by Stustoys View Post
    Its the other Bob's fault this time.


    Anyone know that the fliud filled glass tubes are?


    Stuart
    Looks like a standard cell (very accurate voltage source)

    Standard_Cell

    John

  3. #3
    BobL is offline Member: Blue and white apron brigade
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    Default

    The fluid filled glass thingo looks like some kind of switch - ie only works in one orientation.

    It will be interesting to see what self calibration mechanism it uses.
    If it has none it could be hundreds of degrees out.

  4. #4
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    Quote Originally Posted by GuzziJohn View Post
    Looks like a standard cell (very accurate voltage source)
    wow looks like they could have been made in the same factory, but there doesnt seem to be anything inside mine.


    Quote Originally Posted by BobL View Post
    It will be interesting to see what self calibration mechanism it uses.
    If it has none it could be hundreds of degrees out.
    There is a calibration process, though i THINK its more about adjusting the scale to match the Voltage drop.
    If the blub is replaced there is a matched shunt that comes with it.
    There is also some other adjustment which I dont understand at all ATM.


    I'll scan the intructions tomorrow.

    Stuart

  5. #5
    Join Date
    Apr 2009
    Location
    Tas
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    66
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    30

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    Quote Originally Posted by GuzziJohn View Post
    Looks like a standard cell (very accurate voltage source)

    Standard_Cell

    John
    Agreed. It's a voltage reference (standard cell) optical pyrometer info1

  6. #6
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    Jul 2010
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    Melbourne
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    Quote Originally Posted by Driftabout View Post
    Agreed. It's a voltage reference (standard cell) optical pyrometer info1
    Thats pretty much mine except mine has a third scale 2700F to 5200F (though mine is in C). Few other things are in different places.
    My manual is all photos* which for some reason I find hard to read.

    Stuart

    *well I think they are photos

  7. #7
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    Jul 2010
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    Melbourne
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    Leeds and Northrup Optical Pyrometer 8621, 8622, 8623

    Mines an 8622.

    Don't blame me for most of the out of focus blurriness, thats how they came.

    Ex Commonwealth of Australia department of supply. Ex GMH centeral Laboratory Fishermen's Bend

    Stuart
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  8. #8
    Join Date
    Oct 2011
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    Norwood-ish, Adelaide
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    Default

    So according to page 19, you have to be wearing a collar and tie to get an accurate reading?

  9. #9
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    Quote Originally Posted by Michael G View Post
    So according to page 19, you have to be wearing a collar and tie to get an accurate reading?
    Wouldnt go out to the shed in anything less

  10. #10
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    Damn I look good!
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  11. #11
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    Jan 2011
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    I find this modern idea of removing your jacket just because you enter the workshop/factory floor rather disappointing. It is not very seemly. Some men have even been known to roll up their sleeves. I ask you!

    Dean

  12. #12
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    Apr 2012
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    Qld
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    Quote Originally Posted by Oldneweng View Post
    I find this modern idea of removing your jacket just because you enter the workshop/factory floor rather disappointing. It is not very seemly. Some men have even been known to roll up their sleeves. I ask you!

    Dean
    Shameless ruffians...

    K.

  13. #13
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    I'm rather disappointed that he's not wearing a cravat.......

    Must be free dress day?

    Simon
    Girl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.

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