Jewelry Scale - Problem

Discussion in 'Coin Chat' started by VistaCruiser69, Jun 7, 2020.

  1. VistaCruiser69

    VistaCruiser69 Active Member

    A4C7162F-C204-407D-8DD3-B47E6D64EAC5.jpeg E431FA34-0CC5-4ED1-8921-C0B379A5ACBF.jpeg 790343A6-8F25-493E-9CBC-358F1DC655D1.jpeg 1A78FD23-55E5-40CC-8C60-16AB3FA669D3.jpeg 086FFA37-E6FF-4AE6-8F21-24D861D2352F.jpeg 5905DB52-44BC-40AE-A688-D7730862731C.jpeg C7F5C9B0-DA0F-4EA6-A973-311D6904D5B3.jpeg I purchased a new scale via EBay roughly a year ago. I don’t think I’ve been able to get an accurate measurement. I’ve gone through the calibration process a number of times. I’m hoping a member here is familiar with this specific make/model and may be able to tell if the calibration instructions that came with this unit may be missing a step or is incomplete.

    After conducting the calibration process, I place a quarter on the scale, but I’m not seeing the correct weight reading for a quarter.
     
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  3. VistaCruiser69

    VistaCruiser69 Active Member

    4AFF179E-B05E-4E4D-A5E9-C0E87EFD1FC0.jpeg 36A4596C-C0EA-40DB-AC11-CF5FD9FB6EE1.jpeg BB06D980-2575-4AEA-B5D1-8D542B7506A4.jpeg 89CE364B-4AFE-495F-B20B-EFD0BF476051.jpeg F6EAAA2B-798B-4D8B-9AE8-6A241CD30390.jpeg 049C841B-6E8F-43DC-8818-7A65259022F1.jpeg F8D85F17-E930-4A03-A7EF-D82CF8141515.jpeg 415C879D-42BD-4EB5-9E92-5C464AA37395.jpeg Now with a quarter on the calibrated scale.
     
  4. GH#75

    GH#75 Well-Known Member

    Have you ever used it before now?
     
  5. Phil's Coins

    Phil's Coins Active Member

    I purchased a small scale from Amos Media and I had a friend of mine at a jewelry store check the calibration on it and after he measured a very small amount of gold, it produced an exact reading as the one they use in the store. He ask me for the address of AMOS media and ordered one to carry in his brief case.
    Semper Fi
     
  6. expat

    expat Remember you are unique, just like everyone else

    It's displaying ounces on the screen, in the menu choose grammes to 2 decimal places.
     
  7. expat

    expat Remember you are unique, just like everyone else

    sorry, pressed post before i was finished. The mini jewellery scales i have default to oz and 1 decimal place each time i turn it on. Have to remember to choose what i need each time. Don't know if yours does the same. And before i weigh anything i use a known weight object and tare the scales.
     
  8. Kentucky

    Kentucky Supporter! Supporter

    Is it perhaps reporting the weight of that little black weighing pan? Try zeroing the balance and putting just the quarter on it. Then try putting the black weighing pan on it and pressing the zero, then putting the quarter in the weighing pan.
     
  9. Kentucky

    Kentucky Supporter! Supporter

    BTW, what is your calibration weight you use and did it come with the scale?
     
  10. TheFinn

    TheFinn Well-Known Member

    Are you taring it correctly?
     
  11. VistaCruiser69

    VistaCruiser69 Active Member

    It came with 2 50g weights. I put just one of the 50g on the scale during the calibration process but it always weighs in at 100g. I never get the scale to reflect 50g when that one weight is on the scale.
     
  12. VistaCruiser69

    VistaCruiser69 Active Member

    I'm not familiar with "taring". What is that? When I go through the calibration process, per instructions included, I have the scale set up like in the first 6 or so pix on this thread. It reads "0". I then place the quarter on the scale and get the readings which are in the second set of 7 or so pix.
     
  13. VistaCruiser69

    VistaCruiser69 Active Member

    I calibrated it with the weight pan on the scale. With the weight pan on the scale empty, I get a "0" reading. Once I put the quarter on the scale, I get the readings pictured in the second set of 7 or so pix.
     
  14. VistaCruiser69

    VistaCruiser69 Active Member

    I tried it when I first got it but got the same results. I put it away thinking I was doing something incorrect and would sort it out later the next time I get it out. I've gotten it out about three times over the past year or so since purchasing it. I've never had it give me a correct reading with any coins or the supplied calibration weights. That's why I'm thinking the instructions may be missing a calibration step or something.
     
  15. GH#75

    GH#75 Well-Known Member

    Probably something wrong with the scale then. If you can, return it and get a different one.
     
  16. xlrcable

    xlrcable Active Member

    Just a hypothesis: what if he’s calibrating the scale with a 50g weight when it’s expecting 100g? That would be telling it to read a given weight as twice its actual value - which is what appears to be happening in the last couple of photos.
     
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  17. xlrcable

    xlrcable Active Member

    (The scale shows 11.404g. Half that is 5.702, which exceeds the ideal weight of a quarter by about half a percent. I think that’s well within the tolerance range.)
     
    Kentucky likes this.
  18. desertgem

    desertgem MODERATOR Senior Errer Collecktor Moderator

    Xlrcable is correct, the scale is expecting 100g for calibration, and it should be directly on the scale pan and not in a weighing container. IMO, Jim
     
  19. VistaCruiser69

    VistaCruiser69 Active Member

    Thanks everyone for your help. I'll try that when I get home later on today.
     
  20. Kentucky

    Kentucky Supporter! Supporter

    Yup, use 100 g instead of 50 g. BTW taring is setting the scale to 0 with a container on it.
     
  21. TheFinn

    TheFinn Well-Known Member

    Are you zeroing (taring) the scale with the tray on it?
    I like using an uncirculated 5 cent nickel to verify weight. They weigh 5.00 grams.
     
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