Version 1 June-2011
Instruction manual 5264xxxx
Page 17
Page 16
Instruction manual 5264xxxx
Version 1 June-2011
2.2 Performance indexes.
Noise
: ≤ 60 dB
Timer range:
1-99 min. / 1-999 s / continuous/short-time centrifugation
Temperature rise (ºC) of chamber for 20min centrifugation:
≤10 ºC
Power supply voltage:
AC220V±22V 50Hz±1Hz
Fuse:
Φ5×20 (5A)
Power:
80 W
External dimensions L×W×H:
380×305×290 mm
Weight:
20 Kg
5. OPERATING PRINCIPLE
Upon centrifugal operation, place the centrifugal vessel (centrifugal bottle, centrifugal
test tube etc.) containing equal-part test liquid symmetrically in the centrifugal holes
around the rotor and separate the test liquid under the centrifugal force generated
through high speed rotation of the rotor driven by the electric motor. The magnitude of
its relative centrifugal force (RCF) depends on the rotary diameter r and speed n during
the centrifugation of the sample, its calculating formula is as follows:
Where 1.118·10
-5
una constante.
r= rotary diameter (cm)
n= rotating speed (r/min)
The time T required for separation and settlement of particles in the mixed liquid is cal-
culated by the formula:
R.C.F.= 1.118·10
-5
·r·n
2
(×g)
27.4×(1nR
max
-1nR
min
)µ
n
2
r
2
(σ-ρ)
T=
(min)
Where:
ρ— density of mixed liquid (g/cm³)
µ— viscosity of mixed liquid (P)
n— rotating speed (rpm)
r— diameter of particles (cm)
σ — density of particles (g/cm³)
Rmax— horizontal distance from bottom surface of centrifugal test liquid to shaft cen-
ter (cm
Rmin— horizontal distance from liquid surface of centrifugal test liquid to shaft center
(cm)
Schematic diagram for conditions of test tube during centrifugation
6. STRUCTURAL DIAGRAM AND SYSTEM BLOCK DIAGRAM
Schematic structural diagram of centrifuge
The centrifuge mainly consists of the centrifuge body assembly, rotary assembly, shock
damping system, control system etc., its structural diagram is shown as below:
1. Door cover assembly
2. Rotor system
3. Casing assembly
4. Motor
5. Shock damping system
6. Cushion block
7. Hinge
Rmax
Rmin
ENGLISH
ENGLISH
