If your base unit does not have the mAs function enabled on it, it will not have a calibration certificate because that is the portion of the unit that gets calibrated. The mAs function is separate from a firmware update, so your unit will still receive the firmware update.
DXR+ units also will not have a calibration certificate, as these units only receive a performance check and a complimentary battery replacement if needed. There is no function on this unit that gets calibrated or updated.
