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Old 06-28-2009, 08:25 PM   #1
Jetsona
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Default Hydrometer Calibration

When the hydrometer was purchased water was tested and it read 1.000. The last batch missed its projected OG by .005. THe hydrometer was tested against water and it read .996. How do you adjust it?

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Old 06-28-2009, 08:30 PM   #2
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You dont adjust it, you adjust the gravity to it. Did you use distilled water at the temp that the hydromter was calibrated to, some are 60* and some are 68* I think.

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Old 06-28-2009, 08:37 PM   #3
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Just to be sure....you made sure your samples were 60 degrees right (hydrometers also state whether they are calibrated to 60 or 68 degrees)? If you're certain the water is at the appropriate temp is now reading .996, you then add .004 to your OG readings.

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Old 08-21-2009, 03:09 AM   #4
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Quote:
Originally Posted by Wade E View Post
Did you use distilled water at the temp that the hydromter was calibrated to, some are 60* and some are 68* I think.
does the water need to be distilled in order to read 1.000 at 60 degrees?
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Old 08-21-2009, 03:13 AM   #5
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does the water need to be distilled in order to read 1.000 at 60 degrees?
No, but......if it's inaccurate, that could be why. If you have lots of dissolved solids in your tap water, it could read at 1.002, for example. That doesn't mean the hydrometer is off necessarily, so using distilled water would be the way to check it.
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Old 08-21-2009, 03:17 AM   #6
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I just broke my first and purchased a new one. My gravity readings seemed high so I tested it. After correcting for temp it was 1.004.

So I guess I should try some distilled water tomorrow.

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Old 08-21-2009, 03:31 AM   #7
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Yep - use distilled water at 60 or 68... I have three hydrometers and they vary from 2 to 6 points off.

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Old 08-21-2009, 12:41 PM   #8
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I hate hydromters for this very reason.

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Old 08-22-2009, 01:13 AM   #9
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I hate hydromters for this very reason.
So what is the solution? Refractometer?
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Old 08-22-2009, 01:28 AM   #10
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So what is the solution? Refractometer?
Yes, that was the solution, they are cheap, accurate and dont require large samples or cooling of the sample
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