Buchi B-540 Operation Manual
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Buchi B-540 Operation Manual

Melting point
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  • Page 3: Table Of Contents

    Taking out of operation Spare parts Appendix Please read these instructions thoroughly Connecting a keyboard before using the Melting Point B-540 Unit. Connection of a printer The instructions should be kept near the unit Interface configuration for general reference. Menu chart...

  • Page 4: Scope Of Delivery

    1 Scope of delivery Melting point B-540 1 Scope of delivery 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...
  • Page 5 Melting point B-540 1 Scope of delivery Optional accessories: 1 Keyboard for simple parameter input Swiss keyboard arrangement 29599 USA keyboard arrangement 29548 1 Printer for documentation incl. printer cable 230 V, 50/60 Hz 38706 115 V, 60 Hz 38707...

  • Page 6: Safety

    2 Safety Melting point B-540 2 Safety 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 •...
  • Page 7 Melting point B-540 2 Safety 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).

  • Page 8: Function

    Melting point B-540 3 Function 3 Function 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.

  • Page 9: Putting Into Operation

    Melting point B-540 4 Putting into operation 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).
  • Page 10 4 Putting into operation Melting point B-540 The glass panel is placed into the metal heating block, taking care to touch the panel only laterally. Figure 5: Mounting the glass panel The upper ceramic part of the oven is placed onto the metal block.

  • Page 11: Operation

    UP/DOWN keys to change adjustments of the relative cursor position Keys to store measured values during a determination Figure 8: Front view, B-540 Sample holder for melting point capillaries and boiling point tubes during determination Receptacle for unused melting point capillaries and boiling...

  • Page 12: Operating Setup Of The Menus

    5 Operation Melting point B-540 Operating setup of the menus Mainmenu 1 Mainmenu 2 Mainmenu 3 5.2.1 Main menus TEMPERATURE : 25.0°C TEMPERATURE : 25.0°C TEMPERATURE : 25.0°C SETPOINT 100°C GRADIENT 2.0°C NAME RECALL CLEAR The user may move through these menus for every new MAXPOINT 120°C...
  • Page 13 Melting point B-540 5 Operation (Main menu 3) TEMPERATURE: 25.0 °C RECALL CLEAR Temperature: Current temperature inside of the oven. STORE PRINT RECALL: Calling stored methods for melting point determi- nation STORE: For storing new methods for melting point deter-...

  • Page 14: Preparation Of Samples

    5 Operation Melting point B-540 Preparation of samples Granular crystalline and inhomogenous samples are crushed in the mortar and then filled into the melting point capillary to at least 4-6 mm. In order to obtain comparable results, it is essential that all three capillaries are filled to the same height and that the substance is compacted.

  • Page 15: Determination Of The Setpoint

    Melting point B-540 5 Operation 5.5.1 Determination of the SETPOINT The SETPOINT can be adjusted in the main menu. This is done on every individual digit of the relative number. The SETPOINT is adjusted with keys UP/DOWN and NEXT, the number is trans- mitted with the ENTER key.

  • Page 16: Determination Of The Gradient (Temperaturerise)

    5 Operation Melting point B-540 5.5.2 Determination of the GRADIENT (temperaturerise) The gradient is the heating rate at which heating is continued as from reaching the SETPOINT temperature to MAXPOINT. Adaptation of the gradient is made in 0.1/0.2/0.5/1/2/5/10/ 20°C/min in the main menu.

  • Page 17: Determination Of The Maxpoint

    Melting point B-540 5 Operation 5.5.3 Determination of the MAXPOINT Normally, the temperature of the MAXPOINT is adjusted automatically at 15°C above the SETPOINT. If this temperature differential exceeds 15°C in an individual case, the MAXPOINT may be adapted manually. The MAXPOINT is equally adapted in the main menu.

  • Page 18: Program Management

    5 Operation Melting point B-540 Program management 5.6.1 Assignment of a sample identification If similar parameters are used all over again, it is recommended to store them with sample names. By simply calling them up from the memory, their repeated entering becomes dispensable.

  • Page 19: Storage Of Programs

    Melting point B-540 5 Operation 5.6.2 Storage of parameters Press MENU to change to main menu 3. TEMPERATURE: 25.0 °C RECALL CLEAR STORE PRINT Press NEXT until the cursor is on the STORE field. By pressing ENTER, the program is stored with the selected parameters under the entered name and the display will change to main menu 1.

  • Page 20: Calling Stored Programs

    5 Operation Melting point B-540 5.6.3 Recalling stored programs If similar parameters are used all over again, it is recommended to store them with sample names. By simply recalling them from the memory, their repeated entering becomes dispensable. Stored programs can only be recalled from main menu 3.

  • Page 21: Cancelling Stored Programs

    Melting point B-540 5 Operation 5.6.4 Cancelling stored programs If stored programs are no more needed or if the capacity of storage locations is exhausted, programs may be cancelled (erased). Stored programs can only be cancelled from the main menu.

  • Page 22: Printing Of Results

    5 Operation Melting point B-540 5.6.5 Printing of results 1. Automatic printout after every determination When a determination is complete, results and selected parameters can be printed out automatically. If this automatic printout is required, it is necessary to accesss configuration menu 3.

  • Page 23: Running A Melting Point Determination

    Melting point B-540 5 Operation Running melting point determination 5.7.1 Melting point determination with a known melting point The melting point determination may be started from any main TEMPERATURE : 25.0°C menu. The SETPOINT, GRADIENT and MAXPOINT must first SETPOINT 100°C...

  • Page 24: Melting Point

    5 Operation Melting point B-540 5.7.2 Melting point determination with unknown melting point If the user has no information about the location of the melting point of his substance it can be found out by means of a previous fast determination. For that purpose, it is recommen- ded to select the SETPOINT as low as possible and the temperature GRADIENT as high as possible.
  • Page 25 Melting point B-540 5 Operation Adjusting the temperature program (GRADIENT) (with unknown melting point) Increase or reduce the temperature program until the value of 20°C/min is displayed. Press ENTER to transmit the selected temperature program. The cursor jumps to the next line.
  • Page 26 5 Operation Melting point B-540 Press ENTER to transmit the MAXPOINT temperature. TEMPERATURE : 25.0°C SETPOINT 100°C GRADIENT 2.0°C MAXPOINT 120°C By pressing START, the unit will heat up to the previously selected SETPOINT. The display will show the temperature gradient graphically.

  • Page 27: Modifications Of Parameters During The

    Melting point B-540 5 Operation 5.7.3 Modifications of parameters during a melting point determination Quite frequently, the user will find out during an actual determination that his selected parameters have to be adapted, e.g. because the SETPOINT or the MAXPOINT are too low or because the GRADIENT runs too slowly.
  • Page 28 5 Operation Melting point B-540 Modifications in the ready mode Modifications between SETPOINT and MAXPOINT TEMPERATURE : 140 °C TEMPERATURE 135.6 °C Problem: The temperature GRADIENT and/or MAXPOINT have GR 2.0 °C GR 2.0 °C MP 145 °C been selected too low.

  • Page 29: Boiling Point Determination

    Melting point B-540 5 Operation Boiling point determination Siedepunkt 100 °C Boiling point 100 °C The sample liquid is filled into the capillary of 3.2 mm internal Point d'ébullition 100 °C diameter to a height of 5-10 mm. Use a syringe for easy filling.

  • Page 30: Adjustment Of Subparameters

    5 Operation Melting point B-540 Adjustment of subparameters Sub-parameters are main-settings which have to be presetted by the user when using the insrument the first time. The presettings are located in the sub-menu (Configuration). Press and hold the MENU-key for 3 seconds to enter in this sub-menu.
  • Page 31 Melting point B-540 5 Operation 5.9.2 Modification of time, date and company name If you connect the unit to a printer, the melting points may be printed out with other parameters. In order to permit a better assignment of the printouts, each printout will bear the following: •...
  • Page 32 5 Operation Melting point B-540 5.9.3 Automatic printout after every determination, selection of the printer In this menu, the following adjustments can be carried out: • Automatic printout after every determination • Automatic printout of the transmission curve after every determination •...
  • Page 33 Melting point B-540 5 Operation 5.9.4 Definition of the RS-232 C interface In this menu, you can change the following setting: • Transfer speed (baud rate) • Data word length • Parity • Number of stopbits Press MENU for three seconds to return to the range of sub- menus.
  • Page 34 5 Operation Melting point B-540 5.9.5 Display adjustments, switching on/off, beep In this menu, the following adjustments can be carried out: • Increase/reduce background illumination on the display • Switch the beep on/off Press the MENU key for three seconds to return to the range of submenus.

  • Page 35: Maintenance

    Cleaning The housing of the Melting Point Unit B-540 is coated with paint. It must only be cleaned with a rag to be either dry or moistened with alcohol. Do not use any chlorinated solvents, acetone or similar chemical to clean the magnifying glass.
  • Page 36 6 Maintenance Melting point B-540 6.3.1 Melting point determination procedure for the calibration • The instrument should be calibrated at least once a year. • The reference substances should be stored protected from light in a desiccator over desiccant at room temperature (15-25°C).
  • Page 37 Melting point B-540 6 Maintenance • No systematic deviation from the individual melting points due to the particular position in the heating element shall exceed 0.4°C. For example (repeated measurements): Position 1 Position 2 Position 3 Acceptable yes/no 83.0°C 83.0°C 83.4°C...
  • Page 38 Correction = Theoretical melting point display Examples: • The theoretical melting point of vanillin is 83.0°C. The Büchi Melting Point B-540 found a melting point of 82.3°C. Correction: 83.0°C = +0.7°C • The theoretical melting point of vanillin is 83.0°C. The Büchi Melting Point B-540 found a melting point of 83.0°C.
  • Page 39 Melting point B-540 6 Maintenance Press the MENU key to leave the calibration menu. After entering the values, the correction factors for the middle and right hand columns are added together and entered in the middle column. Thus, the values in the middle column alter following each calibration and the right hand column is then free for the next calibration.

  • Page 40: Customer Service

    Büchi customer service depots have device-specific service manuals which are only available to authorised personnel. Addresses of official Buchi customer service offices are given on the Buchi website under: www.buchi.com. Please contact one of these depots if the unit develops any faults, or you have any technical enquiries or application problems.

  • Page 41: Taking Out Of Operation

    Melting point B-540 7 Taking out of operation 7 Taking out of operation The unit must be cleaned thoroughly. Storage/Transport The unit should be stored and transported in its original packaging and in clean condition. Disposal To ensure the disposal of the Melting Point Unit is as ecofriendly...

  • Page 42: Spare Parts

    8 Spare parts Melting point B-540 8 Spare parts Only original Büchi accessories and spare parts guarantee the operational safety and reliability of this unit. Use of any spare parts or accessories other than Büchi is only permitted with the express permission of the manufacturer. For assembly and dismantling purposes, spare parts should only be used as described in chapter 6 of this instruction manual.

  • Page 43: Appendix

    Melting point B-540 9 Appendix 9 Appendix Connecting a keyboard We recommend to use a keyboard for a simple input of the sample names and sample identifications. Figure 12: Functionkey-line Connection of a printer We recommend to use a printer model Star Printer 512 MC-42 parallel.

  • Page 44: Menu Chart

    Melting point B-540 9 Appendix Menu chart The menu chart of the Melting Point B-540 can be subdivided in 2 main parts: • the 3 main menus (Chapter 9.4.1) Main menu Main menu Main menu Press "MENU"-key for 3 seconds •...
  • Page 45 Melting point B-540 9 Appendix 9.4.1 Main menus 1-3 Actual temperature TEMPERATURE : 25.0°C Setting range: 25 - 400°C SETPOINT 100°C GRADIENT 2.0°C Parameter: 0.1 / 0.2 / 0.5 / 1.0 / 2.0 / 5.0 / 10.0 / 20.0 MAXPOINT 120°C...

  • Page 46: Configuration Menus

    9 Appendix Melting point B-540 9.4.4 Configuration menus English German French Time: 12 (AM/PM) and 24 hours clock. HH = hours, MM = minutes ZEIT XX:XX HEURE XX:XX TIME XX:XX Date: DD = day, MM = month, YY = year DATUM : XX.XX.XX...

  • Page 47: Print-Out

    Melting point B-540 9 Appendix 9.4.5 Error messages Memory is empty - no entries. TEMPERATURE : XXX.X°C MEMORY EMPTY ! PRESS ENTER Program name exists already. Insert a new one. TEMPERATURE : XXX.X°C NAME EXIST ALREADY PRESS ENTER Program not stored, no name has been inserted.

  • Page 48: Error Messages

    9 Appendix Melting point B-540 Error messages Fault Cause Remedy STORED DATA LOST The battery is exhausted Press the Menu key for 5 seconds. PLEASE CHECK BATTERIE Order new battery and have it installed by techn. AND SET TIME AND DATE service.

  • Page 49: Materials Used

    Melting point B-540 9 Appendix Materials used Designation Material Material code Lens holder Grillamid PA 12 Diaphragm Grillamid PA 12 Spacer ring Grillamid PA 12 Collar Arosten Print holder Arosten Upper part of heater Ceramic Heater plate Aluminium ALMGSI 1...

  • Page 50: Declaration Of Ec Conformance

    Melting point B-540 9 Appendix 9.10 Declaration of EC conformance BÜCHI Labortechnik AG Postfach, CH-9230 Flawil Switzerland declare under our sole responsibility that the product: Melting Point B-540/B-545 to which this declaration relates is in conformity with the following standards:...

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