6875 Freezer/Mill
Page 6 of 42 SPEX® SamplePrep LLC DEC 2015
2.0 6875 FREEZER/MILL SPECIFICATIONS
Type of Mill: Cryogenic impact mill
Controller: Touchscreen
Data Transfer: USB Port (back of controller)
Grinding Mechanism: Steel impactor driven by dual electromagnets
Coolant: Liquid nitrogen (LN)
Dimensions: 20½ in. (52 cm) x 21½ in. (55 cm) x 18 in. (46 cm)
Weight: (empty, without vial or coolant) approx. 44 lbs. (20 Kg)
Grinding Vials: One Large Vial (6801), one Mid-Size Vial (6871, 6881, 6885), one to four
Small Vials (6751, 6761, 6771, 6781S) or one Microvial set (6757).
Typical Vial Capacity: Small Vials: actual volume with impactor, approx. 25 ml. Typical sample
weights: 2 grams for biological samples, 1 gram for polymers.
6757 Microvial Set: 100 - 500 mg per individual 6757V Microvial,
depending on sample.
Mid-Size Vials: up to 5 times the sample capacity of Small Vials.
Large Vials: Approximately twice the sample capacity of Mid-Size Vials,
or up to 10 times that of Small Vials.
Actual performance of any vial/sample combination depends on sample
properties, cooling time, grinding time, desired outcome, etc.
Effective capacity for a given sample is determined by experiment.
Overfilling a vial greatly reduces its efficiency.
Typical Liquid Nitrogen 10-15 liters for initial cool-down and filling of the tub.
Consumption: 4-6 liters for each hour of operation.
Actual LN consumption can vary.
Electrical Specifications: CE Approved. Available as 115V/60HZ or 230/50HZ.
Fuses: Two 15-amp slow-blow fuses in AC Input module.
25-amp slow-blow fuse on driver board.
Power Cord: 115V/60HZ version: 3-prong grounded plug supplied.
230V/50HZ version: 2-prong European plug supplied.
Operator is responsible for supplying alternate line cord/plug.
(If necessary)
Safety Features: Lid Interlock prevents mill from running if lid is not latched shut.
Liquid nitrogen sensor shuts down mill if LN level is too low.
NOTE: The sensor can shut down the mill during a run, so the liquid nitrogen level should be
visually checked during extended runs as well as before every run. The Freezer/Mill
warranty does not cover damage to the coil caused by operating the mill with little or no
liquid nitrogen.
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