National Semiconductor bq27411, User Manual

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Calibration
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12 SLUUAP3A – January 2014 – Revised July 2016
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bq27411 EVM: System-Side Impedance Track™ Technology
8 Calibration
The bq27411EVM must be calibrated to ensure accurate value reporting. This can be done by going to the
Calibration window in bqStudio ( Figure 9 ).
8.1 Calibrating the bq27411
1. Select the types of calibration to be performed (see Figure 9 ).
2. Enter the measured values for the types selected.
3. Press the button to calibrate.
8.2 Voltage Calibration
Voltage calibration usually is not required. If needed, follow these steps:
1. Measure the voltage across Pack+ and Pack–.
2. Type the voltage value in mV into Enter measured value .
3. Press the Calibrate button.
8.3 Board Offset Calibration
This performs the offset calibration for the current offset of the board.
It is expected that no current is flowing through the sense resistor while performing this calibration step.
1. Remove load and short PACK– to LOAD–.
2. Press the Calibrate button.
Figure 9. Calibration Screen