... Reference Data for Calibration and Tools . Reference File Information by Instrument . ... If you choose to access the files via this ftp server, keep in mind that there is a known bug in using Safari; the recommended browser is Firefox. ... For the Active Reference Files links below, when you arrive at the page, click on the instrument name, and then on the reference file type of your choice. ... Active Reference Files . Browse the files via FTP (not supported by some browsers) . ...