- resistance graph.png (18.49 KiB) Viewed 2690 times
If they are being intentionally rounded, is there any possibility of accessing the raw resistances?
Resistance readings.
Resistance readings.
I've been reading in the resistance values and have noticed that they are all clamped (if that's the right terminology) to a certain value. In the graph below you can see that resistance jumps from one specific value to another, there's no in between.
Is this just the resolution of the A/D converter or are they being intentionally "rounded" to these values? I was expecting more resolution from the values as each jump in resistance is also a jump in temperature.
If they are being intentionally rounded, is there any possibility of accessing the raw resistances?
Is this just the resolution of the A/D converter or are they being intentionally "rounded" to these values? I was expecting more resolution from the values as each jump in resistance is also a jump in temperature.
If they are being intentionally rounded, is there any possibility of accessing the raw resistances?
Move, copy, clear proc/states: http://manipulator.from-ca.com/
Perform coeff. mods: http://calculator.from-ca.com/
HMI latest ver: http://bbrally.altervista.org/guibeta/i ... r=01042020
Perform coeff. mods: http://calculator.from-ca.com/
HMI latest ver: http://bbrally.altervista.org/guibeta/i ... r=01042020
Re: Resistance readings.
Is your Y axis ohms/10? If so then the variance looks to be 20 ohms, which is not too bad and likely the resolution of the A/D. A 16 bit AD at a 100 kOhm range would vield a resolution of 1.5 ohms.
-BD
-BD
Re: Resistance readings.
The BCS uses a 10 bit ADC. I think what you're seeing is a result of the resolution of the ADC.
We don't do any rounding in software, although we do a running average / oversample to smooth out temperature fluctuations.
We don't do any rounding in software, although we do a running average / oversample to smooth out temperature fluctuations.