ADS1261: Calibration Procedure - User Actions Required

Part Number: ADS1261

We have designed a board with the ADS1261 and it's ready to go out to FAB.

The subject of calibration came up in a meeting.

----------- Overview ------------

The manual says that calibration has three elements with varying
requirements for the end user.

    ADC self calibration
        User does nothing but activate.

    Offset system calibration
        Requires user to short the Load Cell inputs or maybe not ..
         The manual says ..  "Use this Vcom mode (sic) to measure the ADC noise
            performance and offset voltage, or to short the inputs
           for offset calibration"

    Full scale calibration
       Requires  calibration weight  placement by the user (or max voltage applied?)

---------------- Details ----------------

ADC self calibration
  Requires no external actions by the user except to activate it with our provided GUI

Offset system calibration
  The load cell is sealed within an enclosure so there is no access to short the input .
  We could add a relay to short is out controlled by the user GUI, or we could use
  a push button. We'd really like to do neither. The manual mentions Vcom ..
  We're using AVDD = 2.5 and AVSS = -2.5 so can we use Vcom instead of
  horting the inputs?
  I'm guessing if we use Vcom we lose any slight offset from the load cell leads,
  which I would guess is minimal.

Full scale calibration
   Looks like all the user must  do is place a calibration weight on the scale.

So, can we get away the user not having to short out the load cell,
and can we get away with just a calibration weight ????

Thanks,

Tom