Firma:              Heraeus

Modell:                         Varifuge 20 RS

Kommentar:     Dokumente engl.

High-speed cool centrifuge of Heraeus Sepatech.

If reliability offers and reproducible ness.

The new, compact Varifuge 20 RS is the ideal alternative to a big high-speed centrifuge if the place is narrowly rated in a laboratory. Although small in the measurements, it reaches a RZB of almost 50 000 x g. eased the users the rotor change your low work height.

The centrifuge is equipped with Sepacontrol, the versatile control system for programmable centrifuges. A frequency-controlled induction drive, that makes carbonic changes redundant, belongs to the further advantages of the centrifuge.

A series of efficient and versatile rotors is put into action in the appliance.

The rotors

The rotors contain the character name on its cover etc., furthermore on the underside of the body the o.e.code-ring.

Type                                           capacity   max.        max.        Max.       employ- number

                                                                       Trick       RZB        radius   bends segment

                                                                       pay

                            Rotor             ml               min ^-1       g-Zahl        cm           °

HFA    20.16       5153            32 x 16      18000        41656        11,5         23            20

HFA    22.50       5154             8 x 50         20000        48744        10,9         34            24

HFA    18.50       5155             14 x 50      15500        33037        12,3         25             26

HFA    21.94       5156             8 x 94         18500        39794        10,4         20            22

HFA    16.94       5157            10 x 94      13600        28330        13,7         25            18

HFA    14.290    5158            6 x 290      12000        22699        14,1         25            30

* HFA                  12.500         5159           6 x 500      10500        19968     16,2         20         36

HSA    13.94       5161            4 x 94         11000        19750        14,6         90            34

HSA    7.290       5162             4 x 290       6500          7841          16,6         90            40

                                      Cup

HSS    4.500 5148     2251   8 x150     4000            3290          18,4         90            56

                                      2252   4 x150     4000            3434          19,2         90            56

                                      2256   Mikrotiter 4000            3040          17,0         90            56

                                      2353   4 x500     4000            3703          20,7         90            56

* Cone rotor

TECHNICAL SPECIFICATIONS

Temperature area:                                  0° until +40°C

Temperature regulation:                         ± 2° for temperatures between 0° and +40°C.         The attainable lowest temperature is with                      different rotors dependent on the speed.

Temperature ad:                                      two-digit, digitally, (±), in steps of 1°C

Temperature limit:                                   for the test protection leaves itself put in an switch-off temperature above the business                                 temperature. The temperature difference dt             between relaxes and work temperature can lie                between 5° and maximum 40°, (t+dt for dt >5K).

Braking:                                                    at most possible brake strength as well as 8

                                                                  further, terraced, reproducible brake profiles           and free exercise.

Even diagnoses:                                     - not massive load

                                                                  - Infringement of the predialed temperature limit

                                                                  - Wrong rotor programming

                                                                  - Overtemperature of the motore drive

                                                                  - Overtemperature of the cold machine

                                                                  - Infringement of the maximum chamber wall              temperature

                                                                  - Not closed centrifuge cover

                                                                  - Disturbance in the electric control

Data conservation:                                  the stored programs against the Varifuge 20 RS    remains with blackout, furthermore with the                relaxed or clamped appliance approximately          100 days gets.

Driving system:                                        high-performance direct drive with a frequency-       controlled induction motor.

Rotor identification:                                 optical system, necessary for allocation this            maximum rotor speed and rotor radius, for                     the investigation of the RZB-result for the     support of the automatic temperature                                             regulation.

Speed area:                                             100 - 20 000 min-1 adjustable

Speed regulation:                                    precision ± 10 min -1 absolutely, corresponds        0,5 percent with 20 000 min-1

Speed ad:                                                five-digit digital ad there speed on 1 min -1             exact.

Speed primary election:                         five-digit in 10 min-1 increments at

RZB-area:                                                1 - 48 744 xg

(Relative centrifugally -

  acceleration)

RZB-indication:                                        five-digit, digital

RZB-primary:                                            in 1 xg-Increments.

Centrifugal radius:                                   adjustable between 0,1 cm and the rotor-      referential, at most practicable good in steps of                  0,1 cm.

adjustment-range time:                           1 min - 9 h 59 min or

                                                                  10 - 99 h or permanent business ("hld")

In the time of ad:                                      treble, digitally, in the "count down"Modus with

                                                                  Primary election of a time between

                                                                  1 min and 99 h, sees adjustment-range

                                                                  treble, digitally, in the "count up"-Modus with           "hld" (permanent business).

On postponement:                                   1 min - 99 h adjustable

Acceleration:                                            maximum acceleration as well as 8 further, reproducible ones, terraced acceleration                              profiles.

Diameters the rotor - Chamber:             260 mm

Weight:                                                     210 kg

Ground burden:                                        14,8 × 10 3 N × m -2

Height:                                                      700 mm

Width:                                                       670 mm

Depth:                                                       700 mm

Least distance between the wall:          200 mm

Least side distance:                               200 mm

Network connection:                               3 x 380 V, 50 Hz,

Protections in the network-                     3 x 25 A, for 380 v-version,

connection:

Maximum heat depositing at

the surroundings:                                      3,0 kilowatts

Allowable surrounding temperature:     15° to 30°C

Sound development:                               66-69 dBA, 1 m of distance, 1,4 m of height,

norms and rules:                                       accident prevention rule for centrifuges, UVV          VBG 7z.

                                                                  Accident prevention rule

                                                                  for cold installations, UVV VBG2O.

                                                                  Accident prevention rule for electric installations     and Business means UVV VBG 4.

                                                                  Suppression of interference in accordance with      VDE 0875 and VFG 1046.

                                                                  The centrifuge is obligation of examine in    accordance with VBG 7z and if a corresponding                            test book requires. For the examination of UVV      VBG 7z, we recommend you the conclusion of         a maintenance-contract. The centrifuge is not         for the business in explosible surroundings                          been suitable.