Beckman Coulter L-90K Floor Ultra Speed Centrifuge, Beckman Coulter (CAT#: STEM-LC-1567-LGZ)

The manufacturer of Beckman Coulter L-90K Floor Ultra Speed Centrifuge is Beckman Coulter. Model is L-90K. The Beckman Optima™ L-90K Ultracentrifuge provides the fastest separation in the shortest time. This versatile floor model is compatible with a wide range of premium rotors. The L-90k features an unbalance tolerant drive, and its highly efficient vacuum-encapsulated induction drive allows for smooth and quiet performance. Additionally, this ultracentrifuge model is sized for efficient operation within a laminar flow hood. The Beckman L-90K is equipped with an easy-to-use, environmentally friendly and microprocessor-based controlled cooling system that eliminates the use of hazardous liquid refrigerants such as chlorofluorocarbons. Beckman centrifuges also have an overspeed system to ensure that the rotor does not exceed maximum speed. Other features of the centrifuge include digital display and control via touch sensitive keys, selection of slow start and standard acceleration, built-in w2t integrator, air cooled driver, and CFC-free thermoelectric cooling and heating modules.

Condition: used
Weight: 465 kg (1025 lb)
Height (overall): 120.7 cm (47.5 in.)
Width: 94.0 cm (37 in.)
Depth: 67.3 cm (26.5 in.)
Ventilation clearances: 5.1 cm (2 in.) sides; 15.2 cm (6 in.) rear
Maximum heat dissipation into the room: 1.0 kW (3400 Btu/hr)
Humidity restrictions: <95% (non-condensing)
Noise level measured 0.91 m (3 ft) in front of the Instrument: <57 dBa
Installation (overvoltage) category: II
Pollution degree: 2a
Revolution Counter: Displays accumulated total number of rotor revolutions in tens of thousands
Barrier Ring: 41-mm (1.63-in.) heat-treated steel alloy armor ring surrounded by a 12-mm (0.50-in.) steel vacuum chamber to provide full protection for the operator
Door: 17.5-mm (0.69-in.) high-strength structural steel
Vacuum: Diffusion pump in series with a mechanical pump typically reduces chamber pressure to below 5 microns (0.7 Pa)
Speed:
Set speed: 1000 rpm to maximum speed in increments of 100 rpm
Speed control: Actual rotor speed will be ±20 rpm of the set speed (above 1000 rpm)
Speed display: Indicates rotor speed in increments of 10 rpm at speeds below 1000 rpm, and increments of 100 rpm at speed above 1000 rpm
Time:
Set time: Up to 99 hours and 59 minutes; HOLD for runs of unspecified length
Time display: Indicates time remaining in timed runs, time elapsed in HOLD runs, and estimated time remaining in ω2t runs
Temperature:
Set temperature: 0 to 40°C in increments of 1°C
Temperature control: ±0.5°C of set temperature
Temperature display: Indicates rotor temperature in increments of 0.1°C
Temperature stability: Within 0.3°C of set after equilibration
Ambient temperature range: 15 to 40°C
ω2t Integrator:
Set ω2t: Up to 9.99 × 1014 radians squared per second
ω2t display: Shows accumulated centrifugal force to three significant digits (in exponential notation)

1. Select acceleration settings from two profiles: maximum acceleration to set the speed from 0 rpm, or slow acceleration from 0 to 500 rpm, followed by the maximum acceleration to set the speed.
2. Choose a deceleration setting from three configurations: full dynamic braking to 0 rpm, slow (full braking to 500 rpm, then reduced braking to a gentle stop), or no braking.
3. Operation mode: standard start, program start, delayed start; the instrument memory can store up to nine programs.
4. Key switch: used to select normal or partition operation.

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