BQ40Z50-R1: How to set the gas gauging ?

Part Number:BQ40Z50-R1

Dear Sir or Madam:

           I  use the bq40z50-r1 in my  design ,I need to konw ,the "system resistance ",  the "pack resistance"and  the"Term voltage "is a  fixed vaule or a  changing vaule ?

          Once I  set these parameters ,will they change ?

          If they happen change ,what's  wrong ? I have sealed the bq40z50-R1 using the 0x0030.

         Looking forward to your replys .Thank you .