Measuring the IBU dosn´t seem to work properly

[goran]

Hi,
I have just upgraded to the version 2.0.57 and when I create a new recepei I think there must be something wrong in the function of calculateing the IBU.

My recepei is 12 liters with 3 kg malt and if I add 30g of Magnum (13,00%) hops for 60 min boil I only get an IBU of 1,4 - should at least be ten times as much.

Regards
Goran

 

[goran]

I have tested further with the following result. I have 2,25 kg Pilsner malt and 0,50 kg Wienermalt and 30g of Northern Brewer, 9,9%.

If batch-size is 9 liters I get IBU 71,3. If I increase the batch-size to 10 liters the IBU calculated is 68,2. When I set the batch-size to 11 liters the IBU is 0. With 12 liters IBU 2,6, 13 liters 10,6, 14 liters 18,3. With the batch-size 20 liters the IBU is 33,8!

Confusing.

//Goran