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Calibration
19 SLUUA90A – April 2013 – Revised July 2016
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bq27531EVM With bq27531 Battery Management Unit Impedance Track™
Fuel Gauge and bq24192 4.5-A, Switch-Mode Battery Charger for Single-Cell
Applications
Figure 11. Data Memory Screen
To read all the data from the bq27531 non-volatile flash memory, click on the Read All button on the Data
Memory window. Make sure the device is not sealed and in full access to read or write to the data
memory. To update a parameter, click on the desired parameter and a window pops-up that provides
details on the selected parameter. Next, enter the value in the value textbox and press
Enter . After
pressing Enter , bqStudio updates the selected parameter. The Import button in the Data Memory window
can be clicked in order to import an entire configuration from a specified *.gg.csv file.
Save the configuration to a file by clicking the Export button in the Data Memory window and entering a
file name. The configuration is saved to a *.gg.csv file. The module calibration data is also held in the
bq27531 data memory. If the Gauge Dashboard is not displaying any information, then the bq27531 may
not be supported by the bqStudio version being used, a bqStudio upgrade may be required.
7 Calibration
The bq27530EVM must be calibrated to ensure accurate value reporting. This can be done by going to the
Calibration window in bqStudio ( Figure 12 ).
7.1 Calibrating the bq27531
Calibrate each item one at a time in the order presented in this document. Select the types of calibration
to be performed by selecting the corresponding checkbox (see
Figure 12 ).
Enter the measured values for the types selected, if necessary.
Then press the Calibrate Part as indicated below button. After all calibration is complete, close the
Calibrate subwindow. While the Calibrate subwindow is open, even in the background, the calibration
routines are running in firmware. Close the subwindow to ensure that they are stopped before proceeding
with configuration or testing.
7.2 CC Offset Calibration
This performs the internal calibration of the coulomb counter input offset. Press the Calibrate Coulomb
Counter button.