Operation Manual
Mixer B�400
096541
en
BUCHI Mixer B-400
Contents
Contents
Contents 1
1 Scope of delivery 2
2 Saftety 3
3 Function 6
4 Putting into operation 8
5 Operation 9
6 Maintenance 10
7 Taking out of operation 14
8 Replacement parts 15
9 Appendix 17
Read these instructions carefully before you use the BUCHI
Mixer B-400. Keep the instructions in a safe place close to
the Mixer for quick reference whenever required.
Chapter 2 contains important notes concerning safety. Read
these notes to operate the Mixer safely.
Subject to change without prior notification. No part of these
instructions may be processed, duplicated or distributed by
electronic or optical means without the written permission of
BÜCHILabortechnik AG. All rights reserved. Copyright
BÜCHI Labortechnik AG, 1995
en, Version F (22 pages) Order No.
B-400 Instructions 096541
©
1
1 Scope of delivery
Figure 1: General view
BUCHI Mixer B-400
1 Scope of delivery
Designation Order No.
Models:
Version with steel cutter 50 Hz 34220
Version with steel cutter 60 Hz 34325
Version with ceramic cutter 50 Hz 34239
Version with ceramic cutter 60 Hz 34327
Enclosed items:
1 Sample beaker 26441
1 Cutter key 34225
1 Power cable of the following types:
Type CH 10021
Type Schuko 10029
Type GB 17833
Type AUS 17834
Type USA 33756
1 Instructions in the
following languages:
German 096540
English 096541
French 096542
Italian 096543
Spanish 096544
1 Packaging 34447
Figure 2: Enclosed items
Figure 4: Diaphragm seal
2
Figure 3: Cutter
Optional accessories:
Cutter, complete
Steel upper 36913
Steel lower 36914
Ceramic upper 36915
Ceramic lower 36916
Diaphragm seal (Polyvinylidenfluorid) 36912
·
List of applications
German 97661
English 97662
Table 1: Scope of delivery
BUCHI Mixer B-400
2 Saftety
2 Saftety
The Mixer complies with the state of engineering and the
recognized rules of safety.
Please note:
• it should be used by persons with sufficient training
• it should be used for purposes for which it is intended.
Symbols
Stop
Information about hazards which can lead to serious material
damage and cause serious fatal injury.
Warning
Information about hazards which can lead to material damage
and be harmful to your health.
Please note
Ignoring information about technical requirements can lead to
malfunctions, inefficiency and lost production.
·
Requirements to be met by the customer
The Mixer must be operated by laboratory personnel who understand the hazards that can arise when using the Mixer.
These instructions should be read by all personnel prior to the
use of this Mixer.
·
Proper use
The Mixer is designed and built for laboratory service. It is
intended to be used as a disintegrating and mixing machine for
laboratory samples.
The Mixer is used for:
• the disintegration and simultaneous mixing of samples with
a high water, fat or fiber content
• the preparation of samples for trace element analysis.
Practical examples of applications with accompanying notes
can be found in Section 5, Operating the Mixer. For the Mixer to
be used properly, it must be cleaned and handled carefully as
outlined in these instructions.
3
BUCHI Mixer B-4002 Safety
Improper use
The customer is responsible for any damage due to any use
other than those already listed or any application that does not
conform with the technical data.
The following applications are prohibited:
• Use of organic solvents.
• Samples of hard and brittle materials (e.g. soil samples, hard
grains, sandy samples...) that can wear down the cutter
too quickly, break the beaker or damage the diaphragm seal.
• Hard, deep-frozen samples.
• Preparation of food prior to human or animal consumption
• Samples that may explode and ignite when subjected to
impact, friction, heat or sparking (e.g. explosives, ...).
Substances which may lead to spontaneous reactions or
explosions by impact, friction, heat or sparking are strictly
prohibited.
·
General hazards
Hazards arise generally
• from the two sharp blades rotating at very high speed.
• from replacing the cutter
• from extreme vibrations caused by imbalance due to
improper use
• from unsuitable sample material (risk of fire or explosion).
You are allowed to install and remove only those specific parts
of the Mixer that are so designed to enable it to perform its
function. To do so, you should use the tool supplied with the
Mixer. Apart from authorized maintenance personnel, no one is
allowed to use standard tools to remove any safety devices and
covers.
The Mixer should be turned off and unplugged when replacing
parts!
4
BUCHI Mixer B-400 2 Safety
Safety measures
The guard door must always be closed to operate the Mixer.
After the door latches into position, turn the safety catch fully
clockwise until it stops.
There is a risk of injury when replacing and handling the sharp
cutter. To reduce the risk, you should wear suitable gloves
and use the special tool.
Depending on the sample material in question it may be
necessary to wear additional personal safety items such as
goggles or a laboratory coat.
The customer shall be responsible for instructing personnel.
These instructions are to be considered a part of the Mixer and
should always be kept with it so that operating personnel can
consult them at any time. The instructions can be ordered in
other languages.
The customer shall notify the manufacturer immediately of any
concerns about safe operation.
Modifications are only permitted after consulting with the
manufacturer and obtaining written consent.
Regional and local laws and regulations should be
observed.
Safety elements
The Mixer can only be operated with the safety door closed.
Opening the door while the Mixer is in operation will cause it to
stop. When this happens, the rotating cutter is quickly
decelerated.
For the Mixer to function, the rocker button must be kept
pressed.
If the resistance of the material in the beaker causes the speed
to drop sharply, the beaker and its contents are moved away
from the cutter to prevent possible breakage. Once the required
speed is reached again, the beaker plus contents are moved
back to the cutter.
The power switch also acts as a motor overload or cut-out.
Please read the description in Section 4, Putting into operation.
5
3 Function
BUCHI Mixer B-400
3 Function
The process is based on the simultaneous disintegration
and mixing of sample materials with volumetric reduction, using
two high-speed blades in a beaker.
The materials used are also suitable for the purposes of trace
element analysis. In this case you should consult the matrix
of materials in Section 9, Appendix.
Starting point: Sample material in the beaker, the beaker in
position, the safety door closed.
• Beaker plus contents move up to the cutter.
• As soon as the whole cutter is inside the beaker, it begins to
rotate.
• When the cutter reaches maximum speed, the beaker plus
contents move up to the cutter.
• The membrane pressure automatically accomodates the
sample volume.
• The sample is disintegrated and mixed simultaneously.
• The beaker plus contents moves down far enough for the
cutter to coast to a stop while inside the beaker.
• The beaker plus contents moves down away from the cutter.
a
b
Position of the controls and indicators
a Power switch
b Rocker button
c
c Guard door
d
d Shaft lock button
e
e Door latch
f
f Cover
g Diaphragm seal holder
g
h Diaphragm seal
i Cutter, complete
h
j Glass holder, complete
i
j
Figure 5: Positions and designations of the Mixer’s controls and indicators
6
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