New orders of 500 Series and 939 units are XRGA-native and have been shipping since January 3, 2011.
All units returned for Service are updated to the XRGA Standard. A notice is included in the package to explain the update and the impact of the change.
A 500 Series or 939 that has been updated to new XRGA can be identified by:
500 Series: New Serial number on the Calibration Plaque will start with 70,000 (this is also stored in the instrument).
939: New Serial number on the Calibration Plaque will start with 20,000 (this is also stored in the instrument).
XRGA Sticker on the outside of the instrument.
XRGA sticker on the bottom of instrument next to the serial number.
See more information in the XRGA section of web library; includes details on the use of these instruments with X-Rite software.