The Beckman LS6500 uses racks for holding sample vials for counting. There are mainly two types of racks available for counting samples.

The standard (White) rack hold 12 standard size vials per rack. A maximum of 28 racks can be loaded on to the LS6500 work deck built with a robust rack sample changer at a time, which works out to 336 standard vials at a time.

The miniature (Blue) rack hold 18 miniature vials per rack. The user can load a maximum of 36 racks at a time, which works out to (18 x36=648) miniature vials at a time.

Another type of rack, which is rarely used and seen in the field is the Bio-Vial (Green) Rack. These racks hold 18 Bio-Vials and can only be used on an instrument that uses miniature racks.

A majority of LS6500 comes with the versa rack option installed in it that allows use of standard (White) racks as well as the miniature (blue and green) racks. If the LS6500 does not have the versa-rack option available, it can take only standard racks.

In an LS6500 that has the Versa-rack option available, you will find a separate Mini/Maxi sensor PC board (PN. 500726) mounted on the right rear changer panel of the instrument. This board will be mounted to the right side of the rack reader board (PN. 500728)

 About Color Coded Racks:

The LS6500 also comes with a red rack and yellow rack for use as a Halt Rack and Interrupt rack respectively. The color is for easy recognition ONLY. The user has to use these rack with the correct Command card to work!