Thermo Scientific MR 23i User manual

P/N 50116911-1
Analyze · Detect · Measure · Control™
Instruction Manual
MR 23i

PN 50116911-1
Issued 06/08
Instruction Manual
Jouan MR 23i

Thermo Fisher Scientific MR23i i
Table of contents
Chapter 1 USE AND FUNCTION ......................................................1-1
DESCRIPTION ..................................................................1-1
RELATIVE CENTRIFUGAL FORCE..................................1-1
Centrifugation formulae......................................................1-1
Chapter 2 INSTALLATION PROCEDURE .......................................2-1
LIFTING AND TRANSPORT .............................................2-1
UNPACKING......................................................................2-1
MAINS SUPPLY ................................................................2-2
ENVIRONMENTAL CONDITIONS ....................................2-2
POSITIONING ...................................................................2-2
LID OPENING....................................................................2-2
MANUAL LID UNLOCKING...............................................2-2
INSPECTION.....................................................................2-3
PREPARATION .................................................................2-3
SAMPLE LOADING ...........................................................2-4
ROTOR INSTALLATION ...................................................2-4
ROTOR REMOVAL ...........................................................2-4
Chapter 3 SPECIFICATIONS ............................................................3-1
DIMENSIONS AND WEIGHT ............................................3-1
ELECTRICAL SPECIFICATIONS......................................3-1
PERFORMANCE...............................................................3-1
Acceleration rate control....................................................3-2
Braking rate control............................................................3-2
Rotor selection table..........................................................3-3
Chapter 4 OPERATING PRINCIPALES ...........................................4-1
DRIVE SYSTEM................................................................4-1
SAFETY INTERLOCK SYSTEM........................................4-1
IMBALANCE DETECTION SYSTEM.................................4-1
REFRIGERATION SYSTEM..............................................4-2
INTEGRATION ..................................................................4-2
Chapter 5 INSTRUCTIONS FOR USE ..............................................5-1
CONTROLS AND INDICATORS .......................................5-1
USE....................................................................................5-3
Chapter 6 HAZARDS, PRECAUTIONS AND LIMITATIONS OF USE 6-1
CAUTIONS ........................................................................6-1
ROTOR AND ACCESSORY PRECAUTIONS...................6-1
IEC 1010-2-020 STANDARD.............................................6-15

ii MR23i Thermo Fisher Scientific
OPERATIONAL LIMITATIONS..........................................6-15
ELECTRICAL.....................................................................6-16
IMPROPER USE ...............................................................6-16
BIOLOGICAL RISKS .........................................................6-16
Chapter 7 SERVICING AND PREVENTATIVE MAINTENANCE .....7-1
CLEANING.........................................................................7-1
PERIODIC PREVENTATIVE MAINTENANCE..................7-1
CIRCUIT BREAKER ..........................................................7-1
Annex A GUARANTEE TERMS .....................................................A-1

Chapter 1
USE AND FUNCTION
Thermo Fisher Scientific MR23i 1-1
Chapter 1 USE AND FUNCTION
DESCRIPTION The Jouan MR23i is a high speed centrifuge (23 000 rpm) desi-
gned to separate substances by elevated centrifugal acceleration.
It is equally suited to precise, low speed operation.
Different rotors can be fitted to the drive in order to match the sam-
ple containers and the required performance. The maximum speed
(and, by consequence, the resultant centrifugal force) is a function
of the rotor in use.
A control system permits the speed, acceleration and braking
rates, run time and temperature to be monitored and controlled.
Refrigeration is assured by a refrigerant group charged with a
CFC-free fluid. The refrigerant fluid circulates around the chamber
to achieve maximum efficiency.
RELATIVE
CENTRIFUGAL
FORCE
Suspended solids are separated by the Relative Centrifugal Force
(RCF) applied to the sample. The effective force increases with the
square of the speed of rotation and the distance from the axis of
rotation.
The following formulae permit the calculation of primary parame-
ters and of transformations relating to changes in primary parame-
ters.
Note The value introduced for the radius can be adjusted to allow for posi-
tion within the tube such as at a boundary. Maximum radii are quoted
in the specifications tables (chapter 3).
Centrifugation
formulae
Note To calculate actual results, press the keys on a pocket calculator in
the order shown.
R radius (in millimetres)
N speed (in r.p.m.) ÷ 1000
RCF gravitational acceleration ‘g’
M+ add to memory
MR memory recall

Chapter 1
USE AND FUNCTION
1-2 MR23i Thermo Fisher Scientific
Primary calculations Key sequence (not valid for
CASIO, HP)
Transformations Key sequence
To determine actual ‘g’ achieved at a different speed:
To determine actual speed required to achieve a different ‘g’ at the
same radius:
To determine actual speed required to achieve the same ‘g’ at a diffe-
rent radius:
RCF xg() 1.118RN2 =Nx x1.118xR==
Speed (rpm) 946 RCF
R
------------
=RCF R÷x946=
Radius (mm) RCF
1.118N2
----------------------=Nx x1.118 M RCF MR=
÷+==
RCF2 RCF1=N2
N1
--------
⎝⎠
⎛⎞
2Nx x1.118÷M RCF MR=÷+=
N2 N1=RCF2
RCF1
--------------- RCF2 RCF1 xN1==÷
N2 N1=R1
R2
------- R1 R2 xN1==÷

Chapter 2
INSTALLATION PROCEDURE
Thermo Fisher Scientific MR23i 2-1
Chapter 2 INSTALLATION
PROCEDURE
LIFTING AND
TRANSPORT Due to the weight of the machine, all lifting and transporting must
be carried out using proper handling equipment (eg: fork lift trolley)
that complies with current regulations, and by people having under-
gone the necessary training.
The machine must be supported from underneath. If it has to be
transported without its pallet, for example on a staircase, professio-
nal handling assistance is required.
UNPACKING Delivery should include the following items:
• 1 Centrifuge
• 1 Tool kit
• 1 User’s manual
Unscrew the 4 wing nuts situated at the base of the packaging. Lift
off the upper part of the packaging.
With the aid of a Philips headed screwdriver, unscrew the holding
screw from each side of the instrument.
IMPORTANT: AT LEAST 2 PEOPLE ARE REQUIRED TO LIFT
THE CENTRIFUGE FROM THE PALETTE AND PLACE IT ON
THE BENCH.
The bench must be of a rigid construction capable of supporting the
weight of the centrifuge (85 kg).
Figure 2-1. Unpacking

Chapter 2
INSTALLATION PROCEDURE
2-2 MR23i Thermo Fisher Scientific
MAINS SUPPLY The Jouan MR23i requires a single phase supply:
Maximum power requirement : 1300 VA (average: 1000 VA). The
centrifuge should be connected to a 3 wire earthed outlet.
Remember that in order to respect the electrical safety standards
related to protection of operators against indirect contact, the sup-
ply of power to the instrument must be via a power socket fitted
with a protection device ensuring automatic cut-off in the case of an
insulation fault.
A supply fitted with a cicuit breaker of the correct rating complies
with this requirement.
ENVIRONMENTAL
CONDITIONS This instrument is designed to operate safely under the following
conditions:
• Indoor use.
• Temperature: 5° to 40°C.
• Maximum relative humidity of 80% for temperatures up to 22°C.
• Maximum altitude: 2000 m.
Maximum performance is assured across the following tempera-
ture range: 15°C to 25°C.
POSITIONING Place the centrifuge on a bench-top, able to support its weight of
85 kg and vibrations, in a clean, noncorrosive environment. Posi-
tion the centrifuge. Leave a 30 cm space free on each side of the
machine and behind.
LID OPENING When the centrifuge is switched on, wait until display returns to the
stand-by mode then pull forwards the latch lever located on the
right hand side of the unit: the lid is automatically unlocked and
opens.
MANUAL LID
UNLOCKING In the case of a mains power cut, opening of the lid is prevented by
the lid locking safety device.
It is recommended to wait for the mains to be switched back on so
that this safety device enables the lid to be unlocked.
11174729 220/240 V 50 Hz 6 A + earth
11174730 120 V 60 Hz 11 A + earth
11174731 230 V 60 Hz 6 A + earth