Before installing the accessory, it's critical to make sure the instrument is in working order.
Power down the instrument and remove the accessory. Power up, turn on the lamps, and leave it on for an hour. Run the Instrument Performance Tests located in the Validate application. . If they pass then the instrument is ready to run. Failure should be addressed without the accessory installed.
The Help menu includes the manual for the DRA-CA-301. It is listed under accessories, Solid Samples. instructions for installation and operation are provided there.
Once you verify the performance of the Cary 300 instrument.
Install the the mirror M3 in the reflectance position when aligning the mirrors.
Verify that the DRA is NOT plugged in during alignment.
Then turn off the Cary, plug in the DRA and put the spectralon disks covering the sample port, close covers and power on.