This command is similar to the Start Concurrent Measurement with the addition of a checksum. For example: 0CC!000302<CR><LF> would then, after 3 seconds, reply to the aD0! command as follows:
0D0!0+24.6038+0.34513L<DEL>j<CR><LF>. Where L<DEL>j is the checksum for the two measurement values +24.6038 + 0.34513. The aCC1 to aCC9 commands are reserved for future use.