B4i-M
1 - 1
1.1. PURPOSE
This manual contains maintenance instructions intended for use by a qualified maintenance or service
technician. It is organized to provide maintenance personnel with basic data on the theory of operation to
assist in troubleshooting. Moreover, it outlines parts replacement and calibration procedures for putting
the centrifuges back into service.
Should a specific maintenance problem arise which is not covered in this manual, please ask the
authorized service organization in your area for assistance, or contact our after sales department :
JOUAN SA
AFTER SALES SERVICE
C.P. 3203, 44805 SAINT-HERBLAIN CEDEX - FRANCE
Tel. +33 (0) 2 40 16 80 00 - Fax : +33 (0) 2 40 94 70 16
Telex : 711062 JOUAN NT
JOUAN LTD JOUAN GmbH
Merlin Way, Quarry Hill Road Kapellenstrasse 22
ILKESTON, DERBYS, DE7 4RA - U.K. 82008 UNTERHACHING - GERMANY
Tel. (0115) 944 7989 Tel. : (089) 611 4038
Fax : (0115) 944 7080 Fax : (089) 611 3087
JOUAN INC.
Delivery address : 110-B Industrial Drive, WINCHESTER, VA 22602 - U.S.A
Postal address : P.O. Box 2716, WINCHESTER, VA 22604-9879 - U.S.A
Tel. (540) 869 8623 - Fax : (540) 869 8626 - Toll free : (800) 662 7477
1.2. PRESENTATION
The B4i and BR4i (refrigerated) centrifuges are instruments designed for laboratory use. Using relative
centrifuge force (RCF) allows elements of different density to be separated.
The rotor is the main load; a swing-out design allows a higher load than does an angle design. The larger
the rotor diameter is, the higher the load can be and thus the slower the speed will be.
The RCF is directly proportional to the radius of sedimentation and to the square of the speed.
The gas used in the refrigeration system (BR4
i) is R134a, without CFC, recommended by the directive for
protection of the ozone layer.
1 INTRODUCTION
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