Hydrometer discrepancy? - RealBeer.co.nz2024-03-29T13:19:26Zhttp://www.forum.realbeer.co.nz/forum/topics/hydrometer-discrepancy?commentId=1500433%3AComment%3A230108&feed=yes&xn_auth=noGood idea. I will try this. B…tag:www.forum.realbeer.co.nz,2016-02-02:1500433:Comment:2301082016-02-02T22:07:28.340ZDaniel Ashmanhttp://www.forum.realbeer.co.nz/profile/DanielAshman
<p>Good idea. I will try this. Based on my calculations the difference in the 2 readings is too high to be accounted for due to temperature calibration difference alone.</p>
<p>Good idea. I will try this. Based on my calculations the difference in the 2 readings is too high to be accounted for due to temperature calibration difference alone.</p> I've heard of the paper scale…tag:www.forum.realbeer.co.nz,2016-02-02:1500433:Comment:2299172016-02-02T21:48:16.959ZAarad Russellhttp://www.forum.realbeer.co.nz/profile/Aarad
<p>I've heard of the paper scale slipping inside the hydrometer. <br/>You might want to try it in water (as close to the hydrometers rated temperature as you can) which will hopefully give you a result around 1.000 SG. You should be able to add/subtract any major difference there to your cider reading, provided that you account for any temperature differences.</p>
<p>I've heard of the paper scale slipping inside the hydrometer. <br/>You might want to try it in water (as close to the hydrometers rated temperature as you can) which will hopefully give you a result around 1.000 SG. You should be able to add/subtract any major difference there to your cider reading, provided that you account for any temperature differences.</p> In my experience, there's not…tag:www.forum.realbeer.co.nz,2016-02-02:1500433:Comment:2301032016-02-02T19:21:38.066ZDruidhttp://www.forum.realbeer.co.nz/profile/druid
In my experience, there's not really anything else which could affect the gravity beside temp (and further fermentation) - you've noted the only other possibility (gas bubbles sticking to the hydrometer bulb - but 12 points is perhaps too big a difference to be explained by that).<br />
You could try shaking your sample to degas it and let it stand for a while so that it goes completely flat. Then when you measure the gravity, also get the temperature and adjust for it if you need to.
In my experience, there's not really anything else which could affect the gravity beside temp (and further fermentation) - you've noted the only other possibility (gas bubbles sticking to the hydrometer bulb - but 12 points is perhaps too big a difference to be explained by that).<br />
You could try shaking your sample to degas it and let it stand for a while so that it goes completely flat. Then when you measure the gravity, also get the temperature and adjust for it if you need to. Other than temperature is the…tag:www.forum.realbeer.co.nz,2016-02-01:1500433:Comment:2300892016-02-01T20:54:18.672ZDaniel Ashmanhttp://www.forum.realbeer.co.nz/profile/DanielAshman
<p>Other than temperature is there anything else that could be happening over an hour to cause the reading to change so dramatically?</p>
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<p>I'll take another reading in the next few days and see what it comes out as. I also have a refractometer but from my research refractometer readings are inaccurate once there is alcohol in the sample.</p>
<p>Other than temperature is there anything else that could be happening over an hour to cause the reading to change so dramatically?</p>
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<p>I'll take another reading in the next few days and see what it comes out as. I also have a refractometer but from my research refractometer readings are inaccurate once there is alcohol in the sample.</p> I would trust the first readi…tag:www.forum.realbeer.co.nz,2016-01-29:1500433:Comment:2297822016-01-29T18:46:42.968ZDruidhttp://www.forum.realbeer.co.nz/profile/druid
I would trust the first reading, where you know the sample temperature (although at 24*c, you should use the adjustment chart that came with the hydrometer to adjust for temperature - most hydrometers are accurate at 20*c).<br />
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I notice you are in Auckland - with the recent warm weather, your sample could well have risen way higher, especially if left in the sun or a warm room.<br />
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Having said that, I guess there's a possibility that it degassed while it was standing too, despite spinning it etc.
I would trust the first reading, where you know the sample temperature (although at 24*c, you should use the adjustment chart that came with the hydrometer to adjust for temperature - most hydrometers are accurate at 20*c).<br />
<br />
I notice you are in Auckland - with the recent warm weather, your sample could well have risen way higher, especially if left in the sun or a warm room.<br />
<br />
Having said that, I guess there's a possibility that it degassed while it was standing too, despite spinning it etc.