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BQ35100: TIDA-01546 about Calibrate bq35100

Part Number: BQ35100
Other Parts Discussed in Thread: TIDA-01546, , BQSTUDIO

About TI Designs: TIDA-01546 Battery and System Health Monitoring of Battery-Powered Smart Flow Meters Reference Design

http://www.ti.com/lit/ug/tidudo5a/tidudo5a.pdf

I have some questions to consult.

PAGE 13

3.2.1.1 Steps to Calibrate bq35100

SYS_GND is PACK–? 

from TIDA-01546 Schematic and Block Diagram, I think is. 

2.3.2.1.1.2 Hardware Connections

2. Connect the battery to J3 terminal block (BAT+, BAT–).

3. Connect the load to J3 terminal block (BAT+, SYS_GND).

In 3.2.1.1.3.2 Current Calibration

6. Verify whether the current reports 0 mA.

7. Connect a 1-A load from BAT+ to PACK–

Board Offset/CC Offset calibration need Verify whether the current reports 0 mA. the 0mA means load 0mA? 

Connect the load to J3 terminal block (BAT+, SYS_GND) 

——if I connect 0 mA load means the current reports 0 mA?

please tell me  how J3  connect to  finish Board Offset/CC Offset calibration in TIDA-01546

thank you!