High-Speed Refrigerated Centrifuges


CR22GII

CR21GII
High efficiency, too. From the high-torque brushless motor and powerful refrigeration to automatic rotor identification and other time-saving automated functions, these relatively compact units deliver. Optional high-capacity lightweight rotors are easier to transport and load, and they reduce acceleration and deceleration times beyond those achieved by the powerful motor alone.

Features

Easy operation

  • Movable liquid-crystal panel
  • RCF calculation and display
  • Pre-cooling
  • Rotor database update function
  • CE marking qualified
  • Net run-time input

Advanced technology

  • PWM (Pulse Width Modulation) motor control
  • Automatic rotor identification
  • Non-contact imbalance protection
  • User lockout system
  • “Rotor Quick Setting System” only requires placing the rotor on the drive shaft

Specifications

Model CR22GII CR21GII
Maximum speed (rpm) 22,000 21,000
Maximum RCF (x g) 55,200
(R22A4 rotor)
50,300
(R22A4 rotor)
Maximum capacity (tubes x ml) 1,000 x 4 (R9A rotor)
Maximum speed at maximum-capacity rotor and maximum RCF 9,000 rpm, 15,300 x g
Drive motor High-torque brushless high-frequency motor
Speed control range (rpm) 300 to 22,000 300 to 21,000
Temperature range adjustment (°C) -20 to +40
Timer One second to 99 minutes and 59 seconds, with a HOLD function
(one minute to 99 hours and 59 minutes optional)
Refrigerator capacity/refrigerant 1.5kW/R404a
Function Memory-based programmed operation 30 programmed operations possible
Acceleration/deceleration time variable Nine-stage variable acceleration, nine-stage braked deceleration, plus free deceleration
RCF calculation
RCF integrator
RTC (real-time control)*
Over-speed detector
Rotor stoppage buzzer
Imbalance detection device
Automatic rotor temperature compensation
Self-diagnosis
Automatic rotor identification
User lockout system
Variable deceleration function
Vertical rotor Available
Continuous flow rotor Available
Power requirements Single phase, AC 220/230/240V±10%, 30A, 50/60Hz
Dimensions (mm) 752(W) x 810 (D) x 994 (H/Panel closed) / 1,144 (H/panel opened) / hight to table is 858
Standard accessories Instruction manual, rotor cleaning bar, silicone grease
Weight (kg) 300
Notes:

  1. *The start and end of revolution can be controlled by inputting their time and date. This is the same function as the RTC of the CP-WX/CP-MX/CS-GXL series ultracentrifuge.
  2. The CR-GII series centrifuges must be operated with the automatically identifiable rotors in order to confirm to the CE marking requirments. The following rotors are not equipped with the automatically identification function. When using these rotors, please place an order the CR-GII series centrifuges that are not conforming to the CE marking requirements. R18C, R13C and R10C continuous flow rotors. For further information, please contact your Hitachi distributors.

Cautions during installation

  1. To optimize the heat exchange efficiency of the refrigerator unit, install in a space according to the specifications.
  2. Install on a stable floor.
  3. Avoid installation near equipment that could be a heat source, or in direct sunlight.
  4. An extension cord should not be used.
  5. The heat radiation rate of the centrifuge is about 2.3 kw (about 2,000 kcal/h).
  6. As a safety precaution, ground the equipment properly according to applicable electrical codes.

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