I explayin how to do, looking to the Yamaha R6 electrical circuit manual, the water temperasture sensor (#23 in the picture) is directly connected to the ECU:
Therefore is quite simple to connect it: just take a cable and solder it on the ECU connector G/W (Green/White- mainly is a green cable with a little white stripe) cable, bring it to the XE164 KeyChain and compute the temperature as:
uiTmp = (unsigned int) ( ((float) ( uiTemperature >> 4) ) * (-1.32) + 127.42 )
/*
uiTemperature is the 12-bit ADC converted values, before temperature calculation I reduce the precision to have stable temperature visualization (I do not need so high precision)
*/
I've used such equation since I have desumed from the Yamaha manual the following NTC curve (it declares that the NTC has 6.37KOhm at 0°C and 0.35kOhm at 80°C):
Temperature Vs. NTC resistanceThe same could be plotted as Temperature Vs. ADC Voltage
Temperature Vs. ADC VoltageLooking to the same, but plotting Temperature Vs. ADC value in the range 60°C .. 110°C (the most important temperature range), we get:
Temperature Vs. ADC valueand this is what I measured:
After a little rearrangement, I fit it better:
Now I calculate the SLOPE and the INTERCEPT (I assume a linear equation to have a simple calculation):
SLOPE = -1.32
INTERCEPT = 127.42
1 comment:
Max, I am reading back your post. What is it at the temperature A/D:
"Now I calculate the SLOPE and the INTERCEPT (I assume a linear equation to have a simple calculation):
SLOPE = -1.32
INTERCEPT = 127.42"
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