Dicko72
Well-Known Member
- Joined
- 16/9/10
- Messages
- 63
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Hi Folks,
I use a refractometer for all pre-fermentation gravity readings and a hydrometer for post.
Yesterday I went through a calibration check of my refractometer.
I measured a preboil gravity of 1.047 on my refractometer (after conversion from Brix) which matched my hydrometer, all good!
I left the sample on the refractometer and went to it 15 minutes later and the gravity had gone up slightly.
After an hour the reading was now 1.060!
I have 2 refractometers and both had the same reading as it increased.
The readings were taken with the refractometer being close to 20C but not bang on, cooled wort sample too so I wouldn't expect any evaporation.
Is it normal for Brix readings to increase over time on a refractometer?
Thanks again.
D!CKO
I use a refractometer for all pre-fermentation gravity readings and a hydrometer for post.
Yesterday I went through a calibration check of my refractometer.
I measured a preboil gravity of 1.047 on my refractometer (after conversion from Brix) which matched my hydrometer, all good!
I left the sample on the refractometer and went to it 15 minutes later and the gravity had gone up slightly.
After an hour the reading was now 1.060!
I have 2 refractometers and both had the same reading as it increased.
The readings were taken with the refractometer being close to 20C but not bang on, cooled wort sample too so I wouldn't expect any evaporation.
Is it normal for Brix readings to increase over time on a refractometer?
Thanks again.
D!CKO