Hi,
For some time now I have not used the second order temperature multiplier TempMult2 since I had not characterised my sensor after a replacement. I have done this now and find it could do with a little tweaking.
I thought I would just check my understanding of TempMult2 ini file parameter and check it is working before comitting to it.
The temperature outside just happened to be 2.0 degC, so I set TempMult2=0.5 which should have given me 0.5 * 2.0 * 2.0 = 2.0 but it didn't... I got 4.0
TempMult and TempOffset both seem to produce the correct results.
Are we sure TempMult2 is working? Is anyone else using it okay?
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Not convinced TempMult2 in ini file is working
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Adrian Hudson
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mcrossley
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Re: Not convinced TempMult2 in ini file is working
mult2 * val² + mult * val + offsetAdrian Hudson wrote: ↑Mon 20 Jan 2025 11:37 pm The temperature outside just happened to be 2.0 degC, so I set TempMult2=0.5 which should have given me 0.5 * 2.0 * 2.0 = 2.0 but it didn't... I got 4.0
0.5 * 2.0 * 2.0 + 1 * 2.0 + 0 = 4.0
0.5 is a massive second order correction, at 20°C you would be getting a result of 220°C!
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Adrian Hudson
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Re: Not convinced TempMult2 in ini file is working
Hi Mark,
Yes, thanks. Durr. I had left TempMult as default (1) so I discounted it altogether. In my defence it was late last night.
(I realise the second order figure is ludicrous - I was just using a number that would work with the 2 degC that I happened to have outside at the time. The actual figure is around -0.0002)
Yes, thanks. Durr. I had left TempMult as default (1) so I discounted it altogether. In my defence it was late last night.
(I realise the second order figure is ludicrous - I was just using a number that would work with the 2 degC that I happened to have outside at the time. The actual figure is around -0.0002)