IndyBlueprints
Well-Known Member
I have a new rims system. I am using an Auberins SL-2352 PID. I did an auto tune using just water, with 155F as my target temp. Once I did, according to the PID, it is maintaining 155F. However, the Blichmann Brewmometer in the mash tun reads a consistent 148F. Even over time, it stays right there. To maintain 155F in my mash tun, I had to bump my set temp on the PID to 162F. Once I did that, it stayed right at 155F in the mash tun.
It does make sense to me, since the temp sensor is reading the temp of the water immediately after the heating element, so with that small amount of water running through the rims tube, it heats very quickly. The problem is of course, the temp of the mash tun water is not at my target.
A couple of background notes:
* I did verify accuracy of my temp sensor (rtd 100) was reading 32F in ice water.
* I did verify accuracy of the Brewmometer with another thermometer.
* This test is being done indoors at 69F, so heat loss should be minimal.
* I'm using a 5,500W 240V heating element wired at 120V, so 1,325W effective.
Is this typical?
Should I just plan on setting my PID target temp 7F higher than I want?
Thanks,
Allen
It does make sense to me, since the temp sensor is reading the temp of the water immediately after the heating element, so with that small amount of water running through the rims tube, it heats very quickly. The problem is of course, the temp of the mash tun water is not at my target.
A couple of background notes:
* I did verify accuracy of my temp sensor (rtd 100) was reading 32F in ice water.
* I did verify accuracy of the Brewmometer with another thermometer.
* This test is being done indoors at 69F, so heat loss should be minimal.
* I'm using a 5,500W 240V heating element wired at 120V, so 1,325W effective.
Is this typical?
Should I just plan on setting my PID target temp 7F higher than I want?
Thanks,
Allen