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Table of Contents
Related Manuals for Metrohm 807
Summary of Contents for Metrohm 807
- Page 1 807 Dosing Unit Manual 8.807.8002EN / 2019-09-26...
- Page 3 Metrohm AG CH-9100 Herisau Switzerland Phone +41 71 353 85 85 Fax +41 71 353 89 01 info@metrohm.com www.metrohm.com 807 Dosing Unit Manual 8.807.8002EN / 2019-09-26...
- Page 4 Technical Communication Metrohm AG CH-9100 Herisau techcom@metrohm.com This documentation is protected by copyright. All rights reserved. This documentation has been prepared with great care. However, errors can never be entirely ruled out. Please send comments regarding possible errors to the address above.
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Page 5: Table Of Contents
Total view ................5 Components of the 807 Dosing Unit ........6 Cylinder unit ................8 Connectors (ports) of the 807 Dosing Unit ......9 3 Installation Greasing the dosing unit ............ 10 Mounting the storage vessel and the holder ....11 Mounting the adsorber tube .......... - Page 6 GLP - Validation ..............35 5 Troubleshooting Problems ................37 6 Appendix Buret data ................40 Dosing accuracy ..............41 6.2.1 Typical measurement deviation ..........41 6.2.2 The ISO/EN/DIN standard 8655-3 ........... 41 7 Accessories Index ￭￭￭￭￭￭￭￭ 807 Dosing Unit...
- Page 7 ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of figures Table of figures Figure 1 807 Dosing Unit ................5 Figure 2 807 Dosing Unit - Components ............6 Figure 3 Cylinder unit ..................8 Figure 4 807 Dosing Unit - Ports ..............9 Figure 5 Removing the housing ..............
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Page 9: Introduction
Model versions The 807 Dosing Unit is available with cylinder sizes of 2 mL, 5 mL, 10 mL, 20 mL and 50 mL. In addition to glass cylinders, plastic cylinders (ETFE) specially manufactured for alkali and other aggressive solutions are also available. -
Page 10: About The Documentation
This symbol draws attention to a possible hazard due to electrical current. Warning This symbol draws attention to a possible hazard due to heat or hot instrument parts. Warning This symbol draws attention to a possible biological hazard. ￭￭￭￭￭￭￭￭ 807 Dosing Unit... -
Page 11: Safety Instructions
Set up the instrument in a well-ventilated location. ￭ Keep all sources of flame far from the workplace. ￭ Clean up spilled fluids and solids immediately. ￭ Follow the safety instructions of the chemical manufacturer. ￭ ￭￭￭￭￭￭￭￭ 807 Dosing Unit... -
Page 12: Recycling And Disposal
The correct disposal of your old instrument will help to prevent negative effects on the environment and public health. More details about the disposal of your old instrument can be obtained from your local authorities, from waste disposal companies or from your local dealer. ￭￭￭￭￭￭￭￭ 807 Dosing Unit... -
Page 13: Construction Of The 807 Dosing Unit
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 2 Construction of the 807 Dosing Unit 2 Construction of the 807 Dosing Unit Total view Figure 1 807 Dosing Unit Data chip Coding magnet Contains all specifications for the dosing For automatic recognition of the volume of unit. -
Page 14: Components Of The 807 Dosing Unit
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 2.2 Components of the 807 Dosing Unit Components of the 807 Dosing Unit Figure 2 807 Dosing Unit - Components Data chip Coding magnet(s) Contains all specifications for the dosing For automatic recognition of the volume of unit. the dosing unit. - Page 15 ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 2 Construction of the 807 Dosing Unit Housing Centering tube With data chip, coding magnets, locking Is actuated by Dosino and rotates the entire button and specifications concerning the inner cylinder unit, together with dosing cyl- dosing unit. inder, cylinder base and the integrated valve disc.
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Page 16: Cylinder Unit
2 mL , 5 mL, 10 mL, 20 mL or 50 mL. inder, cylinder base and the valve disc moun- ted within. Material: Borosilicate 3.3 or ETFE Material: PETG or PVDF Cylinder base Seals the dosing cylinder and contains the valve disc. Material: PTFE / Graphite ￭￭￭￭￭￭￭￭ 807 Dosing Unit... -
Page 17: Connectors (Ports) Of The 807 Dosing Unit
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 2 Construction of the 807 Dosing Unit Connectors (ports) of the 807 Dosing Unit Figure 4 807 Dosing Unit - Ports Port 1 VENT Connector (M6) for the dosing tubing. Deaeration, connection (M6) for adsorber tube. Port 4 Port 3 Special port, waste port or recycling port. -
Page 18: Greasing The Dosing Unit
4 Release the locking button. 5 Carefully raise the housing upward. When removing the housing, take care to ensure that the spring clip on the interior side of the housing does not slide out of place. ￭￭￭￭￭￭￭￭ 807 Dosing Unit... -
Page 19: Mounting The Storage Vessel And The Holder
The associated holder is used at the same time for mounting a name plate with the designation of the reagent in the dosing unit. Name plates can be reordered under the order number 6.2244.020 from any Metrohm agent. The dosing unit housing must be removed in order to assemble the stor- age vessel holder (see "Removing the housing", page 10). -
Page 20: Figure 7 Mounting The Storage Vessel And The Holder
5 Slide the housing of the dosing unit onto the centering tube. The centering tube with the cylinder unit must be in correct position when the housing is attached. You will find a positioning aid on the rear side of the dosing unit. ￭￭￭￭￭￭￭￭ 807 Dosing Unit... -
Page 21: Figure 8 Marking Rib On Housing And Distributor
Lock the housing as follows: 1 Hold the distributor in place. 2 Rotate the housing to the left (in clockwise direction). Once all the parts are lined up with one another, the housing will snap into place. ￭￭￭￭￭￭￭￭ 807 Dosing Unit... -
Page 22: Mounting The Adsorber Tube
The VENT connector deaerates the reagent bottle. It should never be entirely sealed off. If no adsorber material is required, then the adsorber tube can be filled with cotton and used as a dust filter. ￭￭￭￭￭￭￭￭ 807 Dosing Unit... -
Page 23: Mounting Filling Tubes
The lip of the bottle should have a plastic decanting ring. Do not use any mechanical aids for mounting the dosing unit. The upper part of the housing should still be easy to turn by hand. ￭￭￭￭￭￭￭￭ 807 Dosing Unit... -
Page 24: Figure 12 Dosing Unit On The Reagent Bottle
Mount the dosing unit as follows: 1 Rotate the adsorber tube upward. 2 Fasten the dosing unit onto the filled reagent bottle. 3 After the dosing unit has been screwed tigh, rotate the adsorber tube back into hanging position. ￭￭￭￭￭￭￭￭ 807 Dosing Unit... -
Page 25: Mounting The Dosing Tubing And Buret Tips
18). The first-time filling of the dosing unit requires no special measures. Each Metrohm control device (e.g. Titrando, Titrino or Sample Processor) is equipped with a PREP/Preparing function with which the filling of the dosing cylinder and the rinsing of the dosing unit tubing can be readily accomplished in an automated sequence. -
Page 26: Buret Tips
The backpressure of the dosed liquid is overcome during the dosing pro- cess. The membrane opens up the tubing end. The tubing end is sealed off again automatically after the dosing is completed. CAUTION Do not disassemble the antidiffusion tip. ￭￭￭￭￭￭￭￭ 807 Dosing Unit... -
Page 27: Avoiding Air Bubbles
Always pull the screw nipple tight with the wrench 6.2739.000. Take care to ensure however that you do not damage the tubing ends while doing All Metrohm devices which support Dosinos as dosing drives offer a PREP/Preparing function. This function is a preparatory step which auto- matically fills cylinders and tubing with liquid. -
Page 28: Figure 14 Air Bubbles In The Cylinder
They can be expelled efficiently prior to the dosing with the PREP function. Any small air bubbles which might form will be held back in a bubble trap. They exercise no influence over the dosing. ￭￭￭￭￭￭￭￭ 807 Dosing Unit... -
Page 29: Disassembling The Dosing Unit
2 Rotate the Dosino on the dosing unit to the right all the way to the UNLOCK marking. 3 Lift the Dosino. 4 Loosen the dosing unit on the bottle. 5 Remove the filling tubing. 6 Remove the storage vessel and the holder. ￭￭￭￭￭￭￭￭ 807 Dosing Unit... -
Page 30: Figure 15 Removing The Housing
5 Carefully raise the housing upward. You will now see the complete cylinder unit with the transparent centering tube which rotates on the distributor with the interior dos- ing cylinder when the flat stopcock is switched. ￭￭￭￭￭￭￭￭ 807 Dosing Unit... -
Page 31: Figure 16 Cylinder Unit On The Distributor
You can now inspect the condition of the cylinder and the piston. The glass cylinder should not exhibit any signs of corrosion. The plas- tic coating PTFE of the piston should not be damaged in any way. Figure 17 Dosing cylinder damaged ￭￭￭￭￭￭￭￭ 807 Dosing Unit... - Page 32 Use caution when handling the 2 mL cylinder! In contrast to the larger dosing cylinders, here the dosing cylinder can be pulled out completely. Pull the dosing piston out of the cylinder as follows: 1 Press down on the white grip of the piston tongs 6.1546.030. ￭￭￭￭￭￭￭￭ 807 Dosing Unit...
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Page 33: Figure 18 Dosing Cylinder With Dosing Piston
4.1, page 31). CAUTION Never disconnect the dosing cylinder from the cylinder base. There is a danger of the sensitive material in the cylinder base (particularly the edges) becoming damaged when the cylinder is attached by hand. ￭￭￭￭￭￭￭￭ 807 Dosing Unit... -
Page 34: Assembling The Dosing Unit
Fit the stoppers as follows: 1 Place the centering tube over the dosing cylinder. 2 Fit the narrow and the wider guide blades on the lower edge of the centering tube into the corresponding recesses of the cylinder base. ￭￭￭￭￭￭￭￭ 807 Dosing Unit... -
Page 35: Figure 20 Centering Tube On The Dosing Cylinder
The dosing piston is pressed into the cylinder until the stopper is flush with the upper edge of the housing. Figure 21 Stopper of the dosing piston flush with the upper edge of the housing 5 Afterwards, remove the housing once again. ￭￭￭￭￭￭￭￭ 807 Dosing Unit... -
Page 36: Attaching Cylinder Unit In Distributor
The marking rib on the housing must be lined up with the marking rib on the edge of the distributor and the centering tube must fit into the opening on the upper side of the housing. ￭￭￭￭￭￭￭￭ 807 Dosing Unit... -
Page 37: Figure 23 Marking Rib On Housing And Distributor
6 Check whether the piston and the centering tube are correctly posi- tioned. 7 Press the entire dosing unit against a tabletop in upside-down posi- tion. The piston stopper must be flush with the upper edge of the hous- ing. ￭￭￭￭￭￭￭￭ 807 Dosing Unit... -
Page 38: Figure 25 Piston Stopper Flush With The Upper Edge Of The Housing
Figure 26 Triangles on the upper side of the dosing unit when the stopcock is set correctly 10 Screw on all tubings and the adsorber tube. Figure 27 Dosing unit completely mounted ￭￭￭￭￭￭￭￭ 807 Dosing Unit... -
Page 39: Handling And Maintenance
Degreasing the piston and the glass cylinder are part of the cleaning ￭ procedure. Use a cloth to wipe down the piston. ￭￭￭￭￭￭￭￭ 807 Dosing Unit... -
Page 40: Cleaning Valve Disc And Distributor Disc
The valve disc and distributor disc must also be checked regularly. Block- age of the valve opening or of the outlet port is to be avoided under all circumstances. Disassembling the dosing unit (see chapter 3.7, page 21). ￭￭￭￭￭￭￭￭ 807 Dosing Unit... -
Page 41: Discs Adhere To One Another
Do not attempt to use excessive force to separate the cylinder from the distributor. Separating the valve disc and distributor discs from one another Proceed as follows: 1 Removing the housing. 2 Remove the centering tube. ￭￭￭￭￭￭￭￭ 807 Dosing Unit... -
Page 42: Resistance And Materials
4 Carefully release the cylinder base from the distributor by hand (with- out rotating it) in order to separate the two discs from one another. If the discs cannot be separated this way, inform the Metrohm Ser- vice Dept. Should it happen that the discs repeatedly adhere to one another, then the contact surfaces of the valve disc and the distributor disc can be greased with a small amount of paraffin grease 6.2803.010. -
Page 43: Glp - Validation
ETFE nels GLP - Validation Every dosing unit manufactured by the Metrohm company is subjected to rigorous quality controls prior to shipment. Every dosing unit is issued a quality certificate attesting to conformance with the strict quality criteria of Metrohm GLP(Good Laboratory Practice) requires, among other... - Page 44 4.2 GLP - Validation Metrohm Application Bulletin 283/1 "Validation of Metrohm burets" ￭ The validation of burets is carried out by the Metrohm-Service with a spe- cial software. The Metrohm agents worldwide offer the possibility of on-site inspections and certifications of dosing units and Dosinos with respect toaccuracy. It is recommended that an accuracy inspection be performed when the dosing cylinders and dosing pistons of a dosing unit are replaced.
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Page 45: Troubleshooting
Remove the dosing drive and then reattach ￭ unit cannot be read. unit mechanically dam- aged or impaired by chem- Clean the data chip and the contact sur- ￭ icals. faces. Have the data chip replaced by the ￭ Metrohm Service Dept. ￭￭￭￭￭￭￭￭ 807 Dosing Unit... - Page 46 Check whether the dosing drive is correctly ￭ seated. Switch the control instrument off and on ￭ again. If necessary contact Metrohm Service Dept. ￭ Dosing unit incorrectly Check whether the nominal volume on the assembled. housing and the effective cylinder volume match one another.
- Page 47 Check whether the connection cable is ￭ attached to the dosing drive. Not possible to Valve disc and distributor Clean valve disc and distributor disc (see chap- rotate the stopcock disc stick to one another. ter 4.1.2, page 32). ￭￭￭￭￭￭￭￭ 807 Dosing Unit...
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Page 48: Appendix
￭ ￭ The 807 Dosing Unit makes it possible to read and overwrite data with the aid of a suitable device (e.g. Titrando). Consult the respective manual in order to determine whether the Metrohm device which you are using is capable of accomplishing this. -
Page 49: Dosing Accuracy
The Metrohm dosing units fulfil the requirements of the ISO/EN/DIN stan- dard 8655-3 Volume measurement instruments with pistons – Part 3: Piston burets. Metrohm guarantees that its dosing units are in com- pliance with the following limit values at the time of shipment: ￭￭￭￭￭￭￭￭... - Page 50 ± 100 µL ± 0.05 % ± 25 µL The Metrohm agents worldwide offer the possibility of on-site dosing unit inspections and certifications with respect to accuracy. We recommend that an accuracy inspection be performed when the dosing cylinders and dosing pistons of a dosing unit are replaced.
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Page 51: Accessories
Downloading the accessories list 1 Enter https://www.metrohm.com/ into your Internet browser. 2 Enter the article number (e.g. 807) into the search field. The search result is displayed. 3 Click on the product. Detailed information regarding the product is shown on various tabs. -
Page 52: Index
Titer ........40 Distributor channels Good Laboratory Practice ..35 Reagent replacement ....21 Material ......35 Ground joint opening ....17 Resistance to chemicals Distributor disc Guide groove ......28 Acetone ......34 Cleaning ......32 ￭￭￭￭￭￭￭￭ 807 Dosing Unit... - Page 53 Scratches ........33 Tubing Cleaning ......32 Sealing lip ......26, 31 Filling ......... 19 Material ......35 Serial number ......40 Tubing diameter ....19, 40 Scratches ......33 SOP .......... 35 Tubing length ..... 19, 40 ￭￭￭￭￭￭￭￭ 807 Dosing Unit...
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