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Metrohm 806 Manual

Metrohm 806 Manual

Exchange unit
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806 Exchange Unit
Manual
8.806.8003EN / v6 / 2025-05-16

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Summary of Contents for Metrohm 806

  • Page 1 806 Exchange Unit Manual 8.806.8003EN / v6 / 2025-05-16...
  • Page 3 Metrohm AG CH-9100 Herisau Switzerland +41 71 353 85 85 info@metrohm.com www.metrohm.com 806 Exchange Unit Manual 8.806.8003EN / v6 / 2025-05-16  ...
  • Page 4 Disclaimer Deficiencies arising from circumstances that are not the responsibility of Metrohm, such as improper storage or improper use, etc., are expressly excluded from the warranty. Unauthorized modifications to the product (e.g., conversions or attachments) exclude any liability on the part of the manufacturer for resulting damage and its consequences.

  • Page 5: Table Of Contents

    2.4.2 Flammable solvents and chemicals ........... 5 2.4.3 Filling the cylinder .............. 6 3 Structure of the 806 Exchange Unit   7 Total view ................ 7 Single parts of the 806 Exchange Unit .......  9 4 Installation   12 Setting up the device ............ 12 4.1.1 Packaging ................ 12 4.1.2 Checks ..................  12 4.1.3...
  • Page 6 Table of contents ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 6 Operation and maintenance   24 Care and maintenance ............ 24 6.1.1 Disassembling the cylinder unit 806 ........ 24 6.1.2 Cleaning the cylinder and piston .......... 25 6.1.3 Assembling the cylinder unit 806 ...........  26 6.1.4 Flat stopcock blocked ............ 27 Chemical resistance and materials ........ 28 6.2.1...
  • Page 7 ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of figures Table of figures Figure 1 806 Exchange Unit ................ 7 Figure 2 806 Exchange Unit - Single parts ............ 9 Figure 3 Thermostat casing ................ 18 Figure 4 Flat stopcock ................... 19 Figure 5 Dosing/filling ...................  22 806 Exchange Unit ￭￭￭￭￭￭￭￭...

  • Page 9: Overview

    1  Overview 1.1  Product description The 806 Exchange Unit is a versatile piston buret which can be operated with various Metrohm dosing devices or titrators. The 806 Exchange Unit is suitable for simple dosings or titrations. Specifications concerning the 806 Exchange Unit and the reagent can be stored in the integrated memory chip.

  • Page 10: Symbols And Conventions

    1.3 Symbols and conventions ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ NOTE Metrohm recommends keeping the accessories list for reference purposes. 1.3  Symbols and conventions The following symbols and formatting may appear in this documentation: Cross-reference to figure legend The first number refers to the figure number, the second to the device part in the figure.
  • Page 11 ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Overview NOTICE This symbol highlights additional information and tips. 806 Exchange Unit ￭￭￭￭￭￭￭￭...

  • Page 12: Safety

    2  Safety 2.1  Intended use Metrohm products are used for the analysis and handling of chemicals. Usage therefore requires the user to have basic knowledge and experience in handling chemicals. Knowledge regarding the application of fire preven- tion measures prescribed for laboratories is also mandatory.

  • Page 13: Requirements For Operating Personnel

    Set up the device in a well-ventilated location (e.g., fume cupboard). ￭ Keep all sources of ignition far from the workplace. ￭ Clean up spilled liquids and solids immediately. ￭ Follow the safety instructions of the chemical manufacturer. ￭ 806 Exchange Unit ￭￭￭￭￭￭￭￭...

  • Page 14: Filling The Cylinder

    A vacuum can arise as a result. If the 806 Exchange Unit is then removed from the device, then the piston may destroy the cylinder. First, loosen the tubing connections on the cylinder before removing the 806 Exchange Unit.

  • Page 15: Structure Of The 806 Exchange Unit

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 3 Structure of the 806 Exchange Unit 3  Structure of the 806 Exchange Unit 3.1  Total view Figure 1 806 Exchange Unit 806 Exchange Unit ￭￭￭￭￭￭￭￭...
  • Page 16 16 Vessel (6.1228.000) For tubing tips or electrodes 17 Main body (6.1576.XXX) .110 for 1 mL cylinder .150 for 5 mL cylinder .210 for 10 mL cylinder .220 for 20 mL cylinder .250 for 50 mL cylinder ￭￭￭￭￭￭￭￭ 806 Exchange Unit...

  • Page 17: Single Parts Of The 806 Exchange Unit

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 3 Structure of the 806 Exchange Unit 3.2  Single parts of the 806 Exchange Unit Figure 2 806 Exchange Unit - Single parts Tubing connection (6.1805.080) Tubing connection (6.1805.100) Length 25 cm Length 40 cm Tubing connection (6.1805.010) Threaded stopper (6.1446.080) Length 13 cm (6.1805.050 for 1 mL cylin-...
  • Page 18 3.2 Single parts of the 806 Exchange Unit ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Mounting ring for cylinder 10 Name plates (6.2244.020) (6.2045.XXX) For labeling the reagent, 10 x .000 for 5 mL cylinder and 10 mL cylinder .010 for 20 mL cylinder .020 for 50 mL cylinder 11 Cylinder (6.1518.XXX)
  • Page 19 ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 3 Structure of the 806 Exchange Unit 27 Dosing tip (6.1543.060) 28 Link stopper (6.1446.030) Made of ETFE/FEP, for dosings 29 Main body (6.1576.XXX) 30 Memory chip .110 for 1 mL cylinder On the underside .150 for 5 mL cylinder .210 for 10 mL cylinder...

  • Page 20: Installation

    The instrument should be protected against excessive temperature fluctua- tions and direct sunlight. 4.2  Start-up 4.2.1  Preparing the 806 Exchange Unit Required accessories: Wrench (6.2739.000) ￭   1 Mount the holding clamps so that the reagent bottle is secure.

  • Page 21: Attaching The 806 Exchange Unit

    ￭ tor)   1 Before attaching the 806 Exchange Unit, check whether the stopcock can be rotated manually with the switching lever. To attach, the switching lever must point to the right (stopcock in dosing position). The arrow marking must point upwards.
  • Page 22 2 Check the position of the piston rod on the underside of the 806 Exchange Unit. The recess in the piston rod must be flush with the base of the 806 Exchange Unit and the smooth surface with the opening must face backwards.

  • Page 23: Filling Tubings

    The Preparing or PREP function of the control software is used to rinse the cylinder and tubings of the 806 Exchange Unit and fill them free of air bubbles. Carry out this function before the first determination or once a day.

  • Page 24: Tubing Tips

    The tubing tip can be stored in the same solvent as the one contained in the reagent in order to prevent reagent crystallization in the tip. Metrohm recommends filling the storage vessel with the solvent and placing the tubing tip in it. If a KF reagent is used as a titrant, then store the dosing tip in methanol or ethanol.

  • Page 25: Removing The 806 Exchange Unit

    Removing the 806 Exchange Unit 1 Perform the 'Filling' function on the control device. NOTE If the piston of the 806 Exchange Unit or the push rod of the drive is not in the zero position, then do not remove the 806 Exchange Unit.
  • Page 26 8 Tighten the sealing ring with the screw nipple.   9 Insert the cylinder with the holder into the thermostat casing and press firmly.   10 Screw the thermostat casing with the cylinder in the main body.   11 Connect thermostat tubings. ￭￭￭￭￭￭￭￭ 806 Exchange Unit...

  • Page 27: Mounting The Flat Stopcock

      5 Rotate the switching lever to the right to the dosing position.   6 Attach the 806 Exchange Unit onto a control device. Flat stopcock types A PCTFE/PTFE stopcock (6.1542.020, standard equipment) and a ceramic stopcock (6.1542.010) are available and can be ordered separately. If hard crystals can precipitate from the solution, then the ceramic stopcock is more suitable.

  • Page 28: Mounting Tubings On The Flat Stopcock

    Silver nitrate, AgNO3 • • TBAOH •   Thiosulfate, Na2S2O3 • • 4.3.3  Mounting tubings on the flat stopcock Mounting tubings on the flat stopcock 6.1805.080 6.1805.100 6.1805.010 Required accessories: Tubing 1 (6.1805.080) ￭ Tubing 2 (6.1805.010) ￭ ￭￭￭￭￭￭￭￭ 806 Exchange Unit...
  • Page 29 PREP/Preparing function. Air bubbles are expelled by repeated dosing and filling. It is important that the tubing connection between the cylinder unit 806 and the flat stopcock is free of bubbles. If necessary, tapping against the tubing helps to remove any remaining bubbles.

  • Page 30: Mode Of Operation

    1 mL, 5 mL, 10 mL, 20 mL or 50 mL. Piston Push rod For ejecting and aspirating a solution. With coupling. For moving the piston in the cylinder unit 806. Dosing tubing Flat stopcock For dosing the solvent via the tubing tip. For switching between filling and emptying the cylinder.
  • Page 31 The rate at which a solution is to be dosed and the rate at which the cylinder is to be filled depend on the cylinder volume of the 806 Exchange Unit. The maximum and minimum filling rates and dosing rates are as...

  • Page 32: Operation And Maintenance

    Metrohm recommends disassembling and cleaning the cylinder unit 806 when replacing reagents. The piston and cylinder of the 806 Exchange Unit can be checked at the same time. When using alkaline, corrosive or highly concentrated reagents, check whether the glass cylinder has been attacked by aggres- sive alkalis, for example, or whether solids have crystallized out of the solution.

  • Page 33: Cleaning The Cylinder And Piston

    4 Remove the 806 Exchange Unit from the drive.   5 Remove all tubing.   6 Unscrew and pull out the cylinder unit 806 with light protection or thermostat casing. If necessary, use the wrench with the insert to loosen the light protection.  ...

  • Page 34: Assembling The Cylinder Unit 806

    The piston should not be greased for pipetting.   6 Check the piston and cylinder for any changes once more before assembling the 806 Exchange Unit. If the cylinder has scratches or rough surfaces, then replace the cylinder. 6.1.3 ...

  • Page 35: Flat Stopcock Blocked

    4 If necessary, clean the stopcock with a suitable solvent (see above) in an ultrasonic bath and then allow it to dry.   5 As soon as the stopcock can be moved again, reinsert the stopcock into the 806 Exchange Unit (see above). 806 Exchange Unit ￭￭￭￭￭￭￭￭...

  • Page 36: Chemical Resistance And Materials

    ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 6.2  Chemical resistance and materials The 806 Exchange Unit is designed for use with aqueous solutions and the most common solvents. The temperature of the dosing material must not exceed 50 °C. The 806 Exchange Unit unit and its components cannot be autoclaved. The sterility of a germ-free dosing material cannot be guaranteed.

  • Page 37: Glp - Validation

    SOP). This may also include a check of dosing accuracy. The regional Metrohm service representatives worldwide offer the possibil- ity of on-site inspections and certifications of piston burets of the 806 Exchange Unit type and dosing drives with respect to accuracy. Metrohm recommends an accuracy inspection whenever a cylinder and/or a piston of a 806 Exchange Unit has been replaced.

  • Page 38: Troubleshooting

    7.1  Problems Problem Cause Remedy 806 Exchange Unit The 806 Exchange Unit Remove the 806 Exchange Unit and reat- ￭ recognized either has not been attached cor- tach it. not at all or incor- rectly. Check the correct placement of the 806 ￭...
  • Page 39 (vacuum in the supply bottle!). One of the openings must be open as pressure equal- ization or has to be equipped with an (open) adsorber tube. Remove the 806 Exchange Unit and check ￭ whether the piston is connected to the push rod of the drive.
  • Page 40 806 Exchange Unit. The cals. cylinder volume is automatically recognized nevertheless, but no data can be read from the 806 Exchange Unit nor be saved on the memory chip anymore.

  • Page 41: Appendix

    8.2.1  Typical measurement deviation The accuracy of products of the 806 Exchange Unit type can be seen in the following table. The values listed are to be regarded as typical values which can be achieved with a Titrando, for example.

  • Page 42: Iso/En/Din Standard 8655-3

    The regional Metrohm service representatives worldwide offer the possibil- ity of on-site inspections and certifications of devices of the 805 Dosimat type and piston burets of the 806 Exchange Unit type with respect to accuracy. Metrohm recommends an accuracy inspection whenever a cylin- der and/or a piston of a 806 Exchange Unit has been replaced.

  • Page 43: Recycling And Disposal

    Local authorities, waste dis- posal companies or dealers provide more detailed information on disposal. Observe the WEEE EU directive (WEEE = Waste Electrical and Electronic Equipment) for the proper disposal of waste electronic equipment within the European Union. 806 Exchange Unit ￭￭￭￭￭￭￭￭...

  • Page 44: Index

    Index ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Index Crystallizing ......16 806 Exchange Unit ....32 GLP .......... 29 Expiry date ......33 Good Laboratory Practice ..29 Manufacturing date .... 33 Accuracy ......29, 34 Name ......... 33 Antidiffusion tip ......16 Titer ........33 Status .........

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