Metrohm 700 Dosino Manual
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Metrohm 700 Dosino Manual

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700 Dosino
Manual
8.700.1023

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  • Page 1 700 Dosino Manual 8.700.1023...
  • Page 3 Metrohm AG CH-9101 Herisau Switzerland Phone +41 71 353 85 85 Fax +41 71 353 89 01 info@metrohm.com www.metrohm.com 700 Dosino Manual 8.700.1023 03.2000 dm...
  • Page 4 Teachware Metrohm AG CH-9101 Herisau teachware@metrohm.com This documentation is protected by copyright. All rights reserved. Although all the information given in this documentation has been checked with great care, errors cannot be entirely excluded. Should you notice any mistakes please send us your comments using the address given above.

  • Page 5: Table Of Contents

    1.2 Application possibilities _________________________ 2 1.2.1 The Dosino as a system component ......3 1.3 Construction of the Dosino burets ________________ 3 1.3.1 The 700 Dosino dosing drive........3 1.3.2 The 710 Dosing unit ............ 4 2 Setup _________________________________________________5 2.1 700 Dosino dosing drive _________________________ 5 2.1.1 Connecting to a control instrument......
  • Page 6 4.2 Dosing accuracy according to ISO 8655-3 __________38 4.3 Technical data _________________________________40 4.4 Warranty and Conformity________________________42 4.4.1 Warranty ..............42 4.4.2 EU Declaration of Conformity ........43 4.4.3 Declaration of Conformity..........44 4.5 Accessories ___________________________________45 5 Index ________________________________________________48 700 Dosino, Instructions for Use...

  • Page 7: Overview

    1 Overview 1.1 Areas of application The Metrohm 700 Dosino is a versatile dosing drive which can be used for a wide range of demanding dosing tasks. It can be oper- ated with various control instruments; this predestines it for use in complex automated systems.

  • Page 8: Application Possibilities

    Dosino can be used with the • 711 Liquino As auxiliary buret the 700 Dosino can be used with e.g. the fol- lowing Metrohm instruments: • 730 Sample changer (connection for up to twelve Dosinos •...

  • Page 9: The Dosino As A System Component

    1.3 Construction of the Dosino burets 1.2.1 The Dosino as a system component 1.3 Construction of the Dosino burets 1.3.1 The 700 Dosino dosing drive guide cam push rod guide cam carrier 700 Dosino, Instructions for use...

  • Page 10: The 710 Dosing Unit

    (PTFE and graphite), 6.1572.XXX (for glass cylinder) Glass cylinder (borosilicate glass) 6.1571.XX ETFE dosing cylin- der, complete with piston and stopcock washer 6.1566.XXX Cylinder base (PTFE/graphite) 6.1573.XXX Stopcock washer (silicon carbide ceramics) Distributor with distributor disk (PVDF/ETFE) 700 Dosino, Instructions for Use...

  • Page 11: Setup

    4.4). If transport damage has occurred please refer to section 4.3 'Warranty'. Location The 700 Dosino is a robust instrument and can therefore be used under rough conditions in laboratories and factories. However, care must be taken that it is not exposed to a corrosive atmosphere.

  • Page 12: Safety Information

    Connection to a control instrument: This instrument must only be connected to that connection socket of a Metrohm instrument which is provided for it (see correspond- ing ‘Instructions for Use’). Only those adapter cables listed in the instructions are to be used.

  • Page 13: 710 Dosing Unit

    This is the filling port (Dosino Port 2). Make care that the tubing is attached tightly so that no air bubbles can penetrate when the reagent solution is aspirated. Tighten the screw nipple firmly by hand. 700 Dosino, Instructions for Use...
  • Page 14 Depending on the application you can now screw the 6.1543.050 Titrating tip with anti-diffusion valve or the 6.1543.060 Dosing tip onto the dosing tubing. The 6.1446.030 Ball stopper supplied can be used to fix the tip in an NS14/15 ground joint opening. 700 Dosino, Instructions for Use...

  • Page 15: Placing The Drive On The 710 Dosing Unit

    • If necessary rotate the centering ring by hand until the ribon rib position is ob- tained. Please note! The dosing drive carrier can only be ad- justed when the control instrument to which it is connected is switched off. 700 Dosino, Instructions for Use...

  • Page 16: Problems In Attaching The Dosing Drive

    2. Setup Never use force when attaching the dosing drive! • Place the dosing drive (700 Dosino) on the 710 Dosing unit. The green line on the Dosino must coin- cide with the short white marking of the dosing unit; see accompanying diagram.

  • Page 17: Removing The Dosing Drive From The 710 Dosing Unit

    • Never adjust the carrier of the Dosino or the centering tube of the dosing unit when these have been separated from each other. This could make attaching the dos- ing unit more difficult; please refer to the explanations on the previous page. 700 Dosino, Instructions for Use...

  • Page 18: Dismantling The Dosing Units

    2.3 Dismantling the dosing units Dosing unit with Dosing unit with plastic cylinder glass cylinder Housing Centering tube Dosing cylin- der with pis- ton and stop- cock washer Distributor Distributor disk with 4 Port connections 700 Dosino, Instructions for Use...

  • Page 19: Opening The Housing

    If the dosing unit is mounted on a reagent bottle screw it off and remove the filling tube. • Place the dosing unit on a flat surface so that the marking showing the volume is facing to- wards you. 700 Dosino, Instructions for Use...

  • Page 20: Centering Tube And Glass Cylinder

    • Take care that the black cylinder base is also lifted up. centering tube distributor piston with piston peg dosing cylinder cylinder base • The centering tube is plugged onto the black cylinder base. Loosen it carefully from the cylinder base. 700 Dosino, Instructions for Use...
  • Page 21 You can now clean or replace the individual components, such as the cylinder or the piston. See chapter 3.3 for cleaning instructions. Please note! It makes no sense to replace the cylinder or the pis- ton separately. Always replace both, if necessary. 700 Dosino, Instructions for Use...

  • Page 22: Centering Tube And Etfe Cylinder

    • The dosing piston can be re- moved with the piston pliers in the same way as for a glass cylinder, see section 2.3.2. Leave the black stopcock washer in the cylinder base. 700 Dosino, Instructions for Use...

  • Page 23: Assembling The Dosing Units

    (for larger diameter cylinders use the middle fin- gers as well) and carefully press the piston into the glass cylinder with uniform pressure. • The upper edge of the sealing lip must be flush with the cylinder rim, see photo. 700 Dosino, Instructions for Use...
  • Page 24 • Now place the dosing unit housing over the centering tube. The alignment is again rib on rib, see photo alongside. Make sure that the centering tube fits into the opening on the top of the housing. 700 Dosino, Instructions for Use...
  • Page 25 Dosino on the top of the dosing unit, see photo. In this recess you will again see two marking ribs. • Rotate the centering tube until these ribs coin- cide. • Refit all tubing and the adsorber tube. 700 Dosino, Instructions for Use...

  • Page 26: Etfe Cylinder

    • The housing can now be attached in the same way as described for the dosing unit with glass cylinder. ⇐ Exception: The 50 mL ETFE cylinder is similar in construction to the glass cylinders and is assembled similarly. 700 Dosino, Instructions for Use...

  • Page 27: Dosino And Dosing Unit Setup

    2.5.2 Double bottle holder (6.2055.100) • The double bottle holder can be adjusted in height. Bottles up to 1 liter can be used. • 2 inserts for sleeves can be used as buret tip or elec- trode holders. 700 Dosino, Instructions for Use...

  • Page 28: 727 Ti Stand (2.727.0Xxx)

    727 Ti Stand (with or without built-in magnetic stirrer). 2.5.4 Direct mounting on canisters • A Dosino with dosing unit can be directly mounted on a canister with a suitable adapter. Use 6.1618.050 Thread adapter. 700 Dosino, Instructions for Use...

  • Page 29: The Dosino In Practice

    Metrohm instruments possess the comfortable 'PREP' function for this important preparation step: a complete rinsing cycle is trig- gered by pressing a key.
  • Page 30 4-way valve, is used for venting the storage container and can be fitted with an adsorber tube. Port 0 (venting the bottle) Port 4 Port 1 Port 3 Port 2 Dosing unit distributor seen from below 700 Dosino, Instructions for Use...
  • Page 31 3.1 Air bubbles are (almost) inevitable The standard assignment listed below applies to the following Metrohm instruments; it cannot be altered: • 726 / 796 Titroprocessor • 736, 751 and 758 Titrino models • 746 VA Trace Analyzer • 756 KF-Coulometer...

  • Page 32: Air Bubbles Are (Almost) Inevitable

    Always tighten up the screw nipples firmly by hand and take care that you do not damage the tubing ends when doing this. All Metrohm instruments which support Dosinos as dosing drives possess a 'PREP' function. This function is a preparation step in which the cylinder and tubing are automatically filled with liquid.

  • Page 33: Reagent Exchange

    If a reagent is not to be used for longer than one week then the dosing unit should be emptied by means of the 'EMPTY' function and the dosing drive removed. 700 Dosino, Instructions for Use...

  • Page 34: Cleaning And Maintenance

    • In order to ensure that the Dosino buret does not leak it must be slightly lubricated. Carefully apply a little 6.2803.000 Grease (silicone-free) with your finger to the outside of the piston and wipe off any excess grease with a soft lint-free cloth. 700 Dosino, Instructions for Use...

  • Page 35: Cleaning The Stopcock Washer And Distributor Disk

    Cleaning the stopcock washer and the distributor disk • Use a liquid detergent. Abrasive powders are unsuitable and could scratch the stopcock washer. • Dry the disks with a lint-free soft cloth. 700 Dosino, Instructions for Use...
  • Page 36 • Mount the distributor disk on the distributor and press it down tight. There is a central hollow on the disk. It has to be facing upwards. • Extend the opening with a plastic pipetting tip again. 700 Dosino, Instructions for Use...

  • Page 37: Troubleshooting / Problems

    Place Dosino buret in an inverted position. 3. Switch on the control instrument and trigger EXCH or FILL. If you can clearly hear the valve rotating the Dosino buret can be replaced on the distributor. 700 Dosino, Instructions for Use...
  • Page 38 17ff. If the valve cannot be rotated or if the piston does not move properly to the zero posi- tion then the dosing unit must be dismantled by a technician from your local Metrohm service center.

  • Page 39: Dosing Unit

    ⇒ Carry out PREP. ⇒ Correct tubing lengths and diameters. Stopcock washer and distributor disk stick together Possible cause: • Precipitation of crystals from the reagent. ⇒ Clean the stopcock washer and distributor disk, see page 29. 700 Dosino, Instructions for Use...
  • Page 40 ⇒ Remove Dosino and put it back on again. ⇒ Check whether the drive is correctly seated. ⇒ Switch control instrument off and on again. ⇒ If necessary contact your local Metrohm service center. 700 Dosino, Instructions for Use...

  • Page 41: Dosing Drive

    3.4.3 Dosing drive Drive carrier rotates continuously. Possible cause: • Dosino electronics damaged. ⇒ Send the dosing drive to your local Metrohm service center for repair. Dosino becomes hot. Possible cause: • Dosing drive is overloaded: 4-way valve or dosing piston is blocked.
  • Page 42 (vacuum in storage bottle!). Port 0 must be open to compen- sate the pressure. ⇒ Remove dosing drive and check whether the drive push rod engages the dosing piston. The piston peg must be flush with the upper side of the housing, see page 19. 700 Dosino, Instructions for Use...

  • Page 43: Appendix

    3.11/95/NT PC program for computer-controlled validation of Metrohm dosing units and exchange units. Apart from a normal personal computer this requires the use of a Metrohm Titrino and either a Sartorius or Mettler analytical balance. • Metrohm 711 Liquino The 711 Liquino has a GLP mode which can be used for the automatic validation of dosing units.

  • Page 44: Dosing Accuracy According To Iso 8655-3

    4.2 Dosing accuracy according to ISO 8655-3 4.2 Dosing accuracy according to ISO 8655-3 Metrohm Ltd. guarantees the following limits (according to ISO 8655-3, draft) for Dosino burets with glass cylinders: Max. permissible systematic error e Nominal Maximum permissible systematic errors e...
  • Page 45 Standard (Piston-operated volumetric apparatus - part 3: Piston burettes), which is to come to effect in the year 2000. • Metrohm burets with glass cylinders in general have a better quality performance (systematic and random error) than the maximum error limits implied. Check your dosing system ac- cording to the ISO test specification.

  • Page 46: Technical Data

    2, 5, 10, 20, 50 mL volume Resolution 10'000 increments per cylinder volume Dosing accuracy Metrohm Dosino burets with glass cylinders fulfill the performance requirements of the ISO 8655-3 draft international standard: Cylinder Resolution Max. systematic...
  • Page 47 This instrument meets the requirements of the standards EN 50081-1 01.92, EN 55011 (class B), EN 55022 (class B). Immunity The following standards are complied with: EN 50082-2/94, IEC801-2 to IEC801-4, EN 50082-1, IEC1000-4-4/95 level 3, IEC 1000-4-5, IEC 1000-4-6. 700 Dosino, Instructions for Use...

  • Page 48: Warranty And Conformity

    Metrohm from any liability to pay compensation. If any instruments and parts have to be returned, the original packaging should be used if at all possible. This applies above all to instruments, electrodes, burette cylinders and PTFE pistons.

  • Page 49: Eu Declaration Of Conformity

    4. Appendix 4.4.2 EU Declaration of Conformity The Metrohm Ltd. company, Herisau, Switzerland hereby certifies, that the instrument: 700 Dosino meets the requirements of EU Directives 89/336/EEC and 73/23/EEC. Source of specifications: EN 50081-1 Electromagnetic compatibility, basic specification Emitted Interference...

  • Page 50: Declaration Of Conformity

    Security specifications IEC1010, EN61010, UL 3101-1 The technical specifications are documented in the instruction manual. Metrohm Ltd. is holder of the SQS-certificate of the quality system ISO 9001 for quality assurance in design/development, production, installation and servicing. Herisau, December 6, 1995 Dr.

  • Page 51: Accessories

    20 mL Dosing unit with dosing tips, M6 6.3031.220 50 mL Dosing unit with dosing tips, M6 6.3031.250 710 Dosing units with ETFE cylinder cylinder for 700 Dosino, incl. accessories 2 mL Dosing unit with dosing tips, M6 6.3030.120 5 mL Dosing unit with dosing tips, M6 6.3030.150...
  • Page 52 Coupling bush for tubings, 2x M6 thread 6.1808.000 T connector , 3x M6 thread 6.1808.060 Olive connector, 1x M6 thread, for tubings (inner diameters appr. 3 mm) 6.1808.020 Thread stopper, outer diameter M6 6.1446.040 700 Dosino, Instructions for use...
  • Page 53 5 mL volume (for dosing unit 6.1567.150) 6.1566.150 10 mL volume (for dosing unit 6.1567.210) 6.1566.210 20 mL volume (for dosing unit 6.1567.220) 6.1566.220 50 mL volume (for dosing unit 6.1567.250) 6.1566.250 More accessories, see Metrohm accessories catalog. 700 Dosino, Instructions for Use...

  • Page 54: Index

    Rinsing cycle .....23 Dismantling .......12 Interfaces ......45 Rinsing volume ....26 Distributor ....14; 24 ISO 8655-3 ......38 Risk of implosion ....25 Distributor disk ....29; 30 Liquino .........2 Dosimat Interface 729 ..45 Lock ......10; 19 Safety information ....6 700 Dosino, Instructions for use...
  • Page 55 Warranty ......42 Spare parts ....... 47 Titration ....... 2 Wire loops ....10; 15 Spring clip ..... 14; 18; 35 Titration burets ....2 Stand assembly ....21 Titrators ....... 2 Standard port occupancy 25 700 Dosino, Instructions for use...

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