I'm trying to get my AFR readout to match the LED display provided by Zeitronix with my ZT-3.
Their scale is here:
I have configured my RCP like in the config.php file attached.
When I start the car, the RCP display on the computer shows 15.32 while the LED shows 14.7
How can I correct the discrepancy, assuming the LED is correct, as it is hard-wired to the controller?
Thanks,
Jake
scaling for dummies
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scaling for dummies
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Scaling
attached is a typical scaling for a Wideband O2 Sensor. Since the output is linear you could use a simple ratio to bias the line of the Display to the Line of the RCP based on known values (i.e, known display of A/F ratio and measured voltage). If 2:14.2 = X:14.7 solve for X and plug it into the RCP. Once you have three points you have a straight line.
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- Typical Sensor Calibration.
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Rocket 6706
when in doubt, use a meter to directly measure the voltage right at the terminal block of RCP - then the mapping should turn it into real-world value.
You can bypass the sensor and just use a 3 legged potentiometer to create a voltage divider between vRef and ground - as the voltage sweeps between 0-5v your scaled value should change accordingly as well.
Looks like you're on the right track overall!
You can bypass the sensor and just use a 3 legged potentiometer to create a voltage divider between vRef and ground - as the voltage sweeps between 0-5v your scaled value should change accordingly as well.
Looks like you're on the right track overall!