Beckman L8-70M Floor Model Ultra Centrifuge
The Beckman L8M is a microprocessor controlled preparative ultracentrifuge used to generate centrifugal forces for the separation of particles, The Beckman L8M ultracentrifuge can work with many of the Beckman family of ultracentrifuge rotors with exception to type 15, 35 and 42.1
The Beckman L8M features the ultra-smooth variable-frequency induction drive; dual program memory; dual purpose digital displays; touch switch’s numeric keypad; programmed operation and 10 deceleration profiles.
A digital display, indicates vacuum level, rotor speed, rotor temperature, run time remaining or elapsed , and accumulated centrifugal effect (ω2t). Actual operation conditions of the instrument are displayed unless either the system is in input mode, or display toggle is set away from display mode. IN this case the selected values for the run show for 5 seconds.
The Beckman L8-70M and the L8M series in general, features touch switches which operate with light finger pressure. An audible beep and green LED indicator signals when each switch is activated. LEDs also signal when the instrument reaches set values during the operational run.
The Beckman L8-70M ultracentrifuge has 3 modes of operation, manual, automatic and programmed. In manual mode, the L8-70M will run all individual run conditions which the user has specified prior to initiating the run. In automatic mode, a run can be repeated in sequence without having to re-enter any run parameters. In the Beckman L8M’s programmed operation, exact duplications of runs can be executed at any time. Programmed operation utilized the Beckman L8M series’ Memory-Pac™ storage module.
Beckman L8-70M Floor Model Ultra Centrifuge Specifications:
|Set Speed||1000-7000 RPM (for L8-70M)|
|Speed Control||± 20 rpm of set speed|
|Speed Display||Digital of rpm in increments of 100 rpm @1000 rpm and 10 rpm at speeds lower then 100 rpm|
|Set Temperature||0°C to +45°C|
|Maximum Temperature||programmable to 50°C|
|Temperature Control (after equilibrium)||± 1°C|
|Temperature Display||Digital read out accurate to ± 1°C|
|Set Time||Up to 99 hrs 59 mins & HOLD for long run times.|
|Time Display||Time Remaining for timed runs, and time elapsed for runs in HOLD mode.|
|Computed Time||In ?2t mode, with speed and ?2t entered- computes value for equivalent time|
|– Set ?2t||up to 9914 radians squared per second.|
|– ?2t Display||Indicated accumulated ?2t to 3 significant figures (exponential notation). Can be used to terminate run at preselected value.|
|– Computed ?2t||In time mode, with speed and time entered, the instrument compute a value for equivalent ?2t.|
|Acceleration||9 Accel profiles or MAX Accel from 0 rpm to set speed.|
|Deceleration||10 Decel profiles or MAX Decel from 0 rpm to set speed.|
|Operation||Manual, Automatic, Programmed; Key Interlock selects normal, zonal or locked operation|
|Dry Cycle||Used to dry out chamber|