Help with OG reading

[Stephenj]

Hi all, brewed a Amarillo SMASH with expected OG of 1.048. The new (cheap) refracto which I've never used before confirms this reading, however the hydro which I have always used says it is 1.060.

My question is: does/could sediment in the bottom of the sample jar that the hydro sits in effect the reading? There is quite a bit in there.

For a little info to help: 2kg of extra pale malt was used in 8l of water, mash for 90 mins, sparge 4 litres and topped up to 12l for the boil.

 

[terrym]

I assume you have correctly calculated your target OG. Have you tested your hydrometer in clean water at the calibration temperature (usually 20*C) . It should read 1.000. And if you spin the hydrometer before allowing it to rest it will get rid of any bubbles or bits clinging to the side and should give a more accurate reading. And I assume the bottom of the hydrometer is free to move and not resting on a layer of solids.

 

[Stephenj]

OG calculated in Brewersfriend. Hydro and refract both been calibrated correctly. The sediment was at the bottom and not touching the hydro in any way, about inch clearance at least.