993944S2

For use with MXL2. Is there a standard method for calibrating the bps? Is the sensor pre-calibrated when it arrives? We are reading 145psi with zero pressure on the pedal, and getting some other funny readings. Thank you.

ProCoach

Don, when configuring the MXL2 channels, there is a dropdown menu allowing you to select from a variety of different sensors that have preloaded, calibrated sensor curves.

For instance, AiM sells a brake pressure sensor by a manufacturer, KA Sensors. The brake pressure has a range of 0-2000 psi, which correlates to .5V (or 500 mV) equaling a zero reading (normally plus/minus a few pounds), to full scale, or 4.5V (or 4500 mV) for 2000 psi measured at the sensor.

If you have selected the proper, matching sensor from the dropdown menu, it should be within dozen pounds at rest.

If it's not, you should first eliminate any possibility of residual pressure by cracking a bleeder and seeing if the Live Measures for the MXL2 change.

If not, you should return the sensor and exchange for another one, or have KA recalibrate it.

You also have the capability of "recurving" the sensor calibration ON the MXL2 by creating a "custom sensor" which more closely approximates what the actual sensor output is and changing what the MXL2 expects to see for a zero pedal pressure.

Begin by reading the milliVolts present in Live Measures at zero pedal pressure. Then, create a custom sensor with that mV reading equaling zero psi, then you can either retain 4500mV for full scale or add to the high reading an equal amount of mV t(hat you raised the floor reading). I'm sure Matt or I can help sort this out, but you should talk to your dealer first.

993944S2

Thank you guys. Sorry for the duplicate posts. It's been a long day.

ProCoach

No trouble.