3
Calibration
The output of the Current sensor is linear with respect to the input current. To collect
data you can:
1.
Use the calibration supplied by the sensor EEPROM memory.
2.
Use the calibration supplied in the standard sensor library of the Coach program.
The name of the Current sensor in the sensor library of Coach is
Current sensor (0222i) (CMA) (-500 .. 500 mA).
3.
Calibrate the sensor using known currents (a standard, simple 2-point calibration
can be done). User calibration can be performed in the Coach software.
Figure 2.
Default calibration graph of the
Current sensor (used in the standard
Coach sensor library and in the sensor
memory).
I (mA) = 78.125 * V
out
(V) – 0.47
Default linear calibration coefficients:
a=78.125; b=-0.47
