Question: ASTM D6290 - Which HunterLab Instruments comply?
The following HunterLab instruments conform to the following D6290 Groups
Group I = LSXE with LAV port plate or LAV sample cup port plate
Group II = CFEZ only with sample cup port plate
Group IV = CQXE/USVis/USPro with LAV Port Plate and SPEX, recommend
using reflectance shelf
Note that for supplier/customer comparisons and approvals it is recommended that only like groups are compared. For example do not compare or use a Group IV standard value or tolerances with a Group I or Group II instrument. Also note that the D25LT conforms to Group II and as of 2016 was still being used by several companies