Metrohm 807 User manual

807 Dosing Unit

Manual

8.807.8002EN / 2019-09-26

Metrohm AG

CH-9100 Herisau

Switzerland

Phone +41 71 353 85 85

Fax +41 71 353 89 01

[email protected]

www.metrohm.com

807 Dosing Unit

Manual

8.807.8002EN / 2019-09-26

Technical Communication

Metrohm AG

CH-9100 Herisau

[email protected]

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.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of contents

807 Dosing Unit ￭￭￭￭￭￭￭￭ III

Table of contents

1 Introduction 1

1.1 Instrument description ......................................................... 1

1.2 Model versions ...................................................................... 1

1.3 About the documentation ................................................... 2

1.3.1 Symbols and conventions ........................................................ 2

1.4 Safety instructions ................................................................ 3

1.4.1 Tubing and capillary connections ............................................. 3

1.4.2 Flammable solvents and chemicals ........................................... 3

1.5 Recycling and disposal ......................................................... 4

2 Construction of the 807 Dosing Unit 5

2.1 Total view .............................................................................. 5

2.2 Components of the 807 Dosing Unit .................................. 6

2.3 Cylinder unit .......................................................................... 8

2.4 Connectors (ports) of the 807 Dosing Unit ........................ 9

3 Installation 10

3.1 Greasing the dosing unit .................................................... 10

3.2 Mounting the storage vessel and the holder ................... 11

3.3 Mounting the adsorber tube ............................................. 14

3.4 Mounting filling tubes ........................................................ 15

3.5 Mounting the dosing unit onto the bottle ....................... 15

3.5.1 Mounting the dosing unit onto the bottle .............................. 15

3.5.2 Mounting the dosing tubing and buret tips ............................ 17

3.5.3 Buret tips ............................................................................... 18

3.6 Avoiding air bubbles .......................................................... 19

3.7 Disassembling the dosing unit .......................................... 21

3.7.1 Disassembling the dosing unit ................................................ 21

3.8 Assembling the dosing unit ............................................... 26

3.8.1 Inserting the dosing piston .................................................... 26

3.8.2 Attaching cylinder unit in distributor ...................................... 28

3.8.3 Attaching the housing ........................................................... 28

4 Handling and maintenance 31

4.1 Care and upkeep ................................................................. 31

4.1.1 Cleaning dosing cylinder and dosing piston ........................... 31

4.1.2 Cleaning valve disc and distributor disc .................................. 32

Table of contents ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

IV ￭￭￭￭￭￭￭￭ 807 Dosing Unit

4.1.3 Discs adhere to one another .................................................. 33

4.1.4 Resistance and materials ........................................................ 34

4.2 GLP - Validation .................................................................. 35

5 Troubleshooting 37

5.1 Problems .............................................................................. 37

6 Appendix 40

6.1 Buret data ........................................................................... 40

6.2 Dosing accuracy .................................................................. 41

6.2.1 Typical measurement deviation .............................................. 41

6.2.2 The ISO/EN/DIN standard 8655-3 ........................................... 41

7 Accessories 43

Index 44

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of figures

807 Dosing Unit ￭￭￭￭￭￭￭￭ V

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 ..................................................................... 10

Figure 6 Greasing the centering tube and interior edges of the housing ........ 11

Figure 7 Mounting the storage vessel and the holder .................................... 12

Figure 8 Marking rib on housing and distributor ............................................ 13

Figure 9 Locking the housing ........................................................................ 13

Figure 10 Mounting the adsorber tube ........................................................... 14

Figure 11 Mounting filling tubes ..................................................................... 15

Figure 12 Dosing unit on the reagent bottle .................................................... 16

Figure 13 Mounting the tubing and the buret tip ............................................ 17

Figure 14 Air bubbles in the cylinder ............................................................... 20

Figure 15 Removing the housing ..................................................................... 22

Figure 16 Cylinder unit on the distributor ........................................................ 23

Figure 17 Dosing cylinder damaged ................................................................ 23

Figure 18 Dosing cylinder with dosing piston .................................................. 25

Figure 19 Inserting the dosing piston .............................................................. 26

Figure 20 Centering tube on the dosing cylinder ............................................. 27

Figure 21 Stopper of the dosing piston flush with the upper edge of the hous-

ing .................................................................................................. 27

Figure 22 Marking ribs on the centering tube and edge of the distributor ....... 28

Figure 23 Marking rib on housing and distributor ............................................ 29

Figure 24 Locking the housing ........................................................................ 29

Figure 25 Piston stopper flush with the upper edge of the housing ................. 30

Figure 26 Triangles on the upper side of the dosing unit when the stopcock is set

correctly .......................................................................................... 30

Figure 27 Dosing unit completely mounted ..................................................... 30

Figure 28 Valve disc in the cylinder base .......................................................... 32

Figure 29 Distributor disc with 4 ports (in the distributor) ................................ 32

Figure 30 Data chip and contact pin ............................................................... 41

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction

807 Dosing Unit ￭￭￭￭￭￭￭￭ 1

1 Introduction

1.1 Instrument description

The 807 Dosing Unit is a versatile buret unit which can be operated with a

700 Dosino or 800 Dosino dosing drive. The 807 Dosing Unit is suitable

for precise dosings, titrations, pipetting procedures, sample transfers, etc.

The four inputs and outputs (ports) are designed for flexible use (presum-

ing the presence of a suitable control device).

Thanks to the transparent housing of the 807 Dosing Unit, piston move-

ments and stopcock rotations are visible. This means that even complex

liquid handling applications are easy to monitor. The unobstructed view

into the dosing cylinder also ensures that solutions can be monitored with

respect to the absence of bubbles and the leak-tightness of the cylinder

unit.

Specifications concerning the dosing unit and the reagent can be stored in

the integrated data chip. This data can be extracted and updated by a

suitable control device.

1.2 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.

Table 1 807 Dosing Unit with glass cylinder

Volume Order number

2 mL 6.3032.120

5 mL 6.3032.150

10 mL 6.3032.210

20 mL 6.3032.220

50 mL 6.3032.250

Table 2 807 Dosing Unit with ETFE cylinder

Volume Order number

2 mL 6.1575.120

1.3 About the documentation ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

2￭￭￭￭￭￭￭￭ 807 Dosing Unit

Volume Order number

5 mL 6.1575.150

10 mL 6.1575.210

20 mL 6.1575.220

50 mL 6.1575.250

1.3 About the documentation

CAUTION

Please read through this documentation carefully before putting the

instrument into operation. The documentation contains information

and warnings which the user must follow in order to ensure safe opera-

tion of the instrument.

1.3.1 Symbols and conventions

The following symbols and styles are used in this documentation:

Cross-reference to figure legend

The first number refers to the figure number, the sec-

ond to the instrument part in the figure.

Instruction step

Carry out these steps in the sequence shown.

Warning

This symbol draws attention to a possible life hazard

or risk of injury.

Warning

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.

Table of contents

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