Buchi B-540 User manual
1
Melting point B-540 Contents
Please read these instructions thoroughly
before using the Melting Point B-540 Unit.
The instructions should be kept near the unit
for general reference.
Chapter 2 contains important notes on safety
which must be observed if the Melting Point
Unit is to be operated safely.
Contents
en, Version L (48 pages) Order No.
B-540 Instructions 96626
1Scope of delivery 2
2Safety 4
3Function 6
4Putting into operation 7
5Operation 9
5.1 Control, operating and display elements 9
5.2 Operating setup of the menus 10
5.3 Definition of concepts on displays 10
5.4 Preparation of samples 12
5.5 Determination of a melting point 12
5.5.1 Determination of the SETPOINT 13
5.5.2 Determination of the GRADIENT (temperature rise) 14
5.5.3 Determination of the MAXPOINT 15
5.6 Program management 16
5.6.1 Assignment of a sample identification 16
5.6.2 Storage of programs 17
5.6.3 Calling stored programs 18
5.6.4 Cancelling stored programs 19
5.6.5 Printing of results 20
5.7 Running a melting point determination 21
5.7.1 Melting point determination with known
melting point 21
5.7.2 Determination of the melting point with unknown
melting point 22
5.7.3 Modifications of parameters during the
determination of a melting point 25
5.8. Boiling point determination 27
5.9 Adjustment of subparameters 28
6Maintenance 33
6.3 Calibration of the unit with calibrating substances 33
6.4Customer service 38
7Taking out of operation 39
8Spare parts 40
9Appendix 41
9.1 Connecting a keyboard 41
9.2 Connection of a printer 41
9.3 Interface configuration 41
9.4 Menu chart 42
9.5 Print-Out 45
9.6 Error messages 46
9.7 Technical data 46
9.8 Materials used 47
9.9 FCC requirements (for USA and Canada) 47
9.10 Declaration of EC conformance 48
Due to continuous improvement and updating, technical
specifications may be altered without prior notice. No part of
this document may be reproduced, copied or transmitte in any
way by using electronic or optical systems without prior
agreement and written permission of Büchi Labortechnik AG.
All rights reserved. © Büchi Labortechnik AG, 1995, 2001
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Melting point B-5401 Scope of delivery
1Scope of delivery
Figure 2: Accessories
2
1
3
5
6
4
7
10
i
8
Figure 1: Complete view of the unit
Description
Appliance models: Order No.
Melting Point Unit B-540,
220-230 V, 50 or 60 Hz 36580
Melting Point Unit B-540,
100-120 V, 50 or 60 Hz 36581
Table 1: Versions of the unit
Accessories:
a1 Oven, upper part of ceramic 34564
b1 Glass panel 34236
c1 Metal cover for heating range 36569
d2 Sample holders of glass 36110
e1 Set of 100 melting point capillaries,each 17808
f1 Set of 10 boiling point tubes, each 19007
g1 Set of 10 boiling point capillaries, each 01762
h2 Spare fuses 20083
1 Mains cable PNE, 2.5 m:
Type CH 10010
Type earthed (shock-proof) 10016
Type GB 17835
Type USA 10020
Type AUS 17836
i1 Brief operating instructions
German 96635
English 96636
French 96661
j1 Compaction wire 36721
1 Operating instructions
German 96625
English 96626
French 96627
Italian 96628
Spanish 96629
1 Packaging
Table 2: Enclosed parts
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Melting point B-540 1 Scope of delivery
Optional accessories:
1Keyboard for simple parameter input
Swiss keyboard arrangement 29599
USA keyboard arrangement 29548
1Printer for documentation
incl. printer cable
230 V, 50/60 Hz 38706
115 V, 60 Hz 38707
1Printer cable 29547
1Melting point capillary (1000 off) 01759
1Boiling point tube (100 off) 19697
1Boiling point capillary (100 off) 19698
1Büchi Certificate for Calibration
at Works G/E/F 97722
Remote control Meltingpoint
(Manual incl. 3 1/2" diskette)
German 33758
English 33758
1Protective cover 36625
1Sample block for prepared
melting point capillaries 36629
Table 3: Optional accessories
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Melting point B-5402 Safety
2Safety
This unit has been designed in accordance with the state of
engineering and the recognised rules of safety. Nevertheless,
it can still be a source of risks and hazards:
•If used by persons with insufficient training
•If used for purposes other than that for which it is intended.
2.1 Symbols
Stop
Information about hazards which can lead to serious material
damage or cause serious or potentially fatal injury.
Warning
Information about hazards which can be harmful to your health
or lead to material damage.
Please note
Information about technical requirements. Non-observance
can lead to malfunctions, inefficiency and lost production.
2.2 Requirements to be met by the customer
The device must only be operated by persons who have the
training or professional experience to comprehend the hazards
that can arise when using the unit. Personnel without such
training or persons currently undergoing a course of training
require thorough instruction. This Instruction Manual should
form the basis of these instructions.
2.3 Proper use
The unit is designed and built for use in laboratories. It is intended
to be used to determine the melting and boiling points at
ambient temperatures of up to 400°C.
2.4 Improper use
Any use other than those already listed, and any application
that does not conform with the technical data is deemed to
be a case of mis-use. The customer shall bear sole
responsibility for any damage due to such mis-use.
The following applications in particular are inadmissible:
•Use in rooms requiring an explosion-proof equipment.
•Extraction of samples which may explode or ignite by a
blow, friction, heat or spark (e.g. explosives, etc.).
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Melting point B-540 2 Safety
2.5 General hazards
General hazards arise from:
•Mixtures of unknown composition or contaminations.
•Combustible gases or solvent vapours in the immediate
vicinity of the unit.
•Damaged glass components.
•An insufficient distance from the back of the unit to the
wall (see chapter 4, Commissioning the unit).
•Burnings by touching hot parts of the heater.
Apart from authorised maintenance personnel, no one is
allowed to remove any safety devices and covers with a
standard tool. The unit must not be put into operation with
damaged glass components.
Touching life parts may result in fatal injury!
2.6 Safety measures
Personal protective garments must be worn, such as goggles
and a laboratory coat.
This Instruction Manual is a component of the melting point
unit and as such it must remain available at any time to the
operating staff where the unit is operated. This also applies to
manuals in other languages which are available on request.
2.7 Modifications
Modifications on the unit or on the spare parts or accessories
as well as the use of any other spare parts or accessories as
those indicated in this Manual are only permitted after consulting
with Büchi Labortechnik AG and obtaining its written consent.
2.8 Responsibility of the operator
The operator is responsible for instructing his personnel. For
that purpose, this Manual can be supplied in other languages.
The operator shall inform the manufacturer without delay on
any events relevant to safety which may occur with operating
the Melting Point Unit.
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Melting point B-540
3 Function
3Function
The Melting Point Unit B-540 is a unit to determine melting
and boiling points at ambient temperatures of up to 400°C.
Three different samples can be determined at the same time.
Values can be detected by viewing the samples.
Operating principle
The Melting Point Unit B-540 provides the melting point in
agreement with pharmacopoeia methodologies and the boiling
point according to Silowopov.
For every determination the procedure is as follows:
1. Selection of the SETPOINT; temperature which is 10°C
below the melting point to be expected.
2. Selection of the temperature GRADIENT; temperature
GRADIENT within the range of the melting point.
3. Selection of the MAXPOINT; temperature at which the
determination can be interrupted automatically.
4. Storage of the parameters selected (if needed).
Figure 3: Analysis flow chart
Heating phase Readiness Melt. det. phase Cooling phase
Sequence of analysis
Temperature
Time
Gradient
Max-
point
Setpoint
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Melting point B-540 4 Putting into operation
Check the unit for any damages immediately after opening
the packaging. It is important that damage incurred during
transit is determined and reported immediately. If this is the
case, a full statement of facts must be made immediately
(and reported to the post office, railway or transport firm).
It is advisable to keep the original packaging for future transport.
4.1 Location of unit
The unit must be erected on a stable, clean and even surface.
For safety reasons and to ensure sufficient cooling in the
electronic compartment, the side walls of the unit must be
placed at least 30 cm away from the walls or other objects.
No containers, chemicals or other appliances should be placed
behind a unit.
4.2 Power connections
Check that the voltage of the socket is identical to the voltage
specified on the unit plate. Only connect the Melting Point
Unit to a plug which is earthed. External couplings and exten-
sion cables must be earthed (3-contact couplings, cables and
connectors). Any interruption of the earth wire is prohibited.
Risks caused by possible internal defects are thus prevented.
4.3 Mounting of accessoires
The sample holders of glass are inserted into the opening of
the housing cover.
The glass sample holders protect the apparatus from dust
and smaller particles and the operator from contact with electric
parts.
Therefore, the apparatus should never be operated without
the sample holders inserted.
4Putting into operation
Figure 4: Mounting the glass sample holder
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Melting point B-5404 Putting into operation
The glass panel is placed into the metal heating block, taking
care to touch the panel only laterally.
Figure 6: Inserting the upper ceramic part
Figure 5: Mounting the glass panel
Figure 7: Fitting the metal cover 5 Operation
The upper ceramic part of the oven is placed onto the metal
block.
The metal cover is placed over the heating area.
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