AEM 30-6905 Universal Programmable EMS-4 - Manual (Page 126)

Page 126 of 279 EMS-4 Install and Tuning Guide_Rev 1.6
Sensor Calibration
Calibrating Temperature Sensors
There are several methods for calibrating temperature sensors for automotive systems. The
most commonly used method is the Comparison Method which utilizes two sensors: one of
unknown quality (the sensor of interest) and one of reference or standard quality. Both sensors
are subject to the same temperature environment and the temperature is cycled over the range
of interest. The sensor calibration curve is modified during the controlled temperature sweep so
the displayed temperature from the unknown sensor is the same as that of the reference
sensor.
Air Temperature
Adjust the values in this curve until the air
temp displayed in AEM Tuner matches the
reference temperature throughout range.