Texas Instruments bq4050EVM-561, User Manual

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8 SLUUBF9 – March 2016
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bq4050EVM-561 Evaluation Module
3.3 Calibration
The bq4050EVM must be calibrated to ensure accurate value reporting. This can be done by going to the
Calibration window in bqStudio ( Figure 5 ).
Figure 5. Calibration Screen
3.3.1 Voltage Calibration
The following list provides information about voltage calibration:
• Measure the voltage from Cell 1 to 1N and enter this value in the Applied Cell 1 Voltage field and
select the Calibrate Voltage box.
• Measure the voltage from BAT+ to BAT– and enter this value in the Applied Battery Voltage field and
select the Calibrate Battery Voltage box.
• Measure the voltage from PACK+ to PACK– and enter this value in the Applied Pack Voltage field and
select the Calibrate Pack Voltage box. If the voltage is not present, turn the charge and discharge
FETs on by pressing the FET_EN button on the Commands panel.
• Press the Calibrate Gas Gauge button to calibrate the voltage measurement system.
• Deselect the Calibrate Voltage boxes after voltage calibration has completed.
3.3.2 Temperature Calibration
The following list provides information about temperature calibration:
• Enter the room temperature in each of the Applied Temperature fields and select the Calibrate box for
each thermistor to be calibrated. The temperature values must be entered in degrees Celsius.
• Press the Calibrate Gas Gauge button to calibrate the temperature measurement system.
• Deselect the Calibrate boxes after temperature calibration has completed.