Metrohm 806 User manual

806 Exchange Unit
Manual
8.806.8003EN / 2019-09-26

Metrohm AG
CH-9100 Herisau
Switzerland
Phone [phone]
Fax [phone]
[email protected]
www.metrohm.com
806 Exchange Unit
Manual
8.806.8003EN / 2019-09-26

Technical Communication
Metrohm AG
CH-9100 Herisau
[email protected]
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.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of contents
806 Exchange Unit ￭￭￭￭￭￭￭￭ III
Table of contents
1 Introduction 1
1.1 About the documentation ................................................... 1
1.1.1 Symbols and conventions ........................................................ 1
1.2 Safety instructions ................................................................ 2
1.2.1 Tubing and capillary connections ............................................. 2
1.2.2 Flammable solvents and chemicals ........................................... 2
1.2.3 Filling the dosing cylinder ........................................................ 3
1.3 Recycling and disposal ......................................................... 3
2 Construction of the 806 Exchange Unit 4
2.1 Total view .............................................................................. 4
2.2 Components of the 806 Exchange Unit .............................. 6
3 Installation 9
3.1 Setting up the instrument .................................................... 9
3.1.1 Packaging ................................................................................ 9
3.1.2 Checks .................................................................................... 9
3.1.3 Location .................................................................................. 9
3.2 Start-up .................................................................................. 9
3.2.1 Preparing the exchange unit .................................................... 9
3.2.2 Attaching the exchange unit .................................................. 10
3.2.3 Filling the tubings .................................................................. 12
3.2.4 Buret tips ............................................................................... 13
3.2.5 Removing the exchange unit ................................................. 14
3.3 Mounting the components ................................................ 14
3.3.1 Mounting the thermostat casing ............................................ 14
3.3.2 Mounting the flat stopcock ................................................... 16
3.3.3 Mounting the tubings on the flat stopcock ............................ 17
4 Mode of operation 19
4.1 Filling the dosing cylinder and dosing .............................. 19
5 Handling and maintenance 21
5.1 Care and upkeep ................................................................. 21
5.1.1 Disassembling the exchange unit ........................................... 21
5.1.2 Cleaning the cylinder and piston ............................................ 22
5.1.3 Assembling the exchange unit ............................................... 23
5.1.4 Flat stopcock blocked ............................................................ 24
5.2 Chemical resistance and materials .................................... 25
5.2.1 Solutions ............................................................................... 25
5.2.2 Body ...................................................................................... 25

Table of contents ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
IV ￭￭￭￭￭￭￭￭ 806 Exchange Unit
5.2.3 Materials ............................................................................... 25
5.3 GLP - Validation .................................................................. 26
6 Troubleshooting 27
6.1 Problems .............................................................................. 27
7 Appendix 30
7.1 Buret data ........................................................................... 30
7.2 Dosing accuracy .................................................................. 30
7.2.1 Typical measurement deviation .............................................. 30
7.2.2 The ISO/EN/DIN standard 8655-3 ........................................... 31
8 Accessories 32
Index 33

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of figures
806 Exchange Unit ￭￭￭￭￭￭￭￭ V
Table of figures
Figure 1 806 Exchange Unit ............................................................................ 4
Figure 2 806 Exchange Unit - Components ..................................................... 6
Figure 3 Thermostat casing ........................................................................... 15
Figure 4 Flat stopcock ................................................................................... 16
Figure 5 Dosing/Filling .................................................................................. 19

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
806 Exchange Unit ￭￭￭￭￭￭￭￭ 1
1 Introduction
The 806 Exchange Unit is a versatile buret unit 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 exchange unit and the reagent can be
stored in the integrated data chip. This data can be read out and updated
by a suitable instrument.
1.1 About the documentation
1.1.1 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.
Method Dialog text, parameter in the software
File ▶ New Menu or menu item
[Next] Button or key
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.

1.2 Safety instructions ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
2￭￭￭￭￭￭￭￭ 806 Exchange Unit
Caution
This symbol draws attention to a possible damage of
instruments or instrument parts.
Note
This symbol marks additional information and tips.
1.2 Safety instructions
1.2.1 Tubing and capillary connections
CAUTION
Leaks in tubing and capillary connections are a safety risk. Tighten all
connections well by hand. Avoid applying excessive force to tubing con-
nections. Damaged tubing ends lead to leakage. Appropriate tools can
be used to loosen connections.
Check the connections regularly for leakage. If the instrument is used
mainly in unattended operation, then weekly inspections are manda-
tory.
1.2.2 Flammable solvents and chemicals
WARNING
All relevant safety measures are to be observed when working with
flammable solvents and chemicals.
￭Set up the instrument in a well-ventilated location.
￭Keep all sources of flame far from the workplace.
￭Clean up spilled liquids and solids immediately.
￭Follow the safety instructions of the chemical manufacturer.

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806 Exchange Unit ￭￭￭￭￭￭￭￭ 3
1.2.3 Filling the dosing cylinder
CAUTION
If a buret tip is clogged, then it could happen that no liquid will be aspi-
rated when the dosing cylinder is being filled. A vacuum can arise as a
result.
If you then remove the exchange unit from the instrument, the piston
could destroy the dosing cylinder.
Do not fail to loosen the tubing connections on the dosing cylinder
first, before you remove the exchange unit. This will eliminate the vac-
uum.
1.3 Recycling and disposal
This product is covered by European Directive 2012/19/EU, WEEE – Waste
Electrical and Electronic Equipment.
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.

2.1 Total view ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
4￭￭￭￭￭￭￭￭ 806 Exchange Unit
2 Construction of the 806 Exchange Unit
2.1 Total view
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Figure 1 806 Exchange Unit
1Tubing connection (6.1805.080)
Length 25 cm
2Threaded stopper (6.1446.080)

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806 Exchange Unit ￭￭￭￭￭￭￭￭ 5
3Bottle attachment (6.1602.105)
Of PFA/PP, thread GL45
4Tubing connection (6.1805.010)
Length 13 cm (6.1805.050 with 1 mL cyl.)
5PCTFE/PTFE flat stopcock (6.1542.020)
Or ceramic stopcock 6.1542.010
6Storage vessel (6.1228.000)
For buret tips or electrodes
7Plate holder (6.2046.070)
For name plates
8Nominal volume
9Data chip
On the underside of the buret
10 Adsorber tube (6.1619.010)
Adsorber tube 6.1619.010
11 SGJ clip (6.2023.020)
Of POM
12 Tubing connection (6.1805.100)
Length 40 cm
13 Bottle with thread (6.1608.23)
Amber glass, thread GL45
14 Antidiffusion tip (6.1543.200)
Of ETFE/FEP, for titrations
15 Link stopper (6.1446.030) 16 Storage vessel (6.1228.000)
For buret tips or electrodes
17 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

2.2 Components of the 806 Exchange Unit ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
6￭￭￭￭￭￭￭￭ 806 Exchange Unit
2.2 Components of the 806 Exchange Unit
Figure 2 806 Exchange Unit - Components
1Tubing connection (6.1805.080)
Length 25 cm
2Tubing connection (6.1805.100)
Length 40 cm
3Tubing connection (6.1805.010)
Length 13 cm (6.1805.050 with 1 mL cyl.)
4Threaded stopper (6.1446.080)
5Torque key (6.2739.000)
For loosening tubing nipples
6Paraffin fat (6.2803.010)
For dosing pistons, 2 g
7Insert for key (6.2739.030)
For loosening the light protection
8Light protection (6.1563.030)
Of PETG

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 2 Construction of the 806 Exchange Unit
806 Exchange Unit ￭￭￭￭￭￭￭￭ 7
9Mounting ring for the cylinder
(6.2045.XXX)
.000 for 5, 10 mL cylinder
.010 for 20 mL cylinder
.020 for 50 mL cylinder
10 Name plates (6.2244.020)
For labeling the reagent, 10 x
11 Dosing cylinder (6.1518.XXX)
Clear glass
.113 1 mL cylinder
.150 5 mL cylinder
.210 10 mL cylinder
.220 20 mL cylinder
.250 50 mL cylinder
12 Flat stopcock
PCTFE/PTFE 6.1542.020
Ceramic 6.1542.010
13 Plate holder (6.2046.070)
For name plates
14 Switching lever
For switching the flat stopcock
15 Storage vessel (6.1228.000)
For buret tips or electrodes
16 Nominal volume
17 Adsorber tube (6.1619.010)
Adsorber tube 6.1619.010
18 Adapter NS14 for adsorber tube
Of ETFE
19 SGJ clip (6.2023.020)
Of POM
20 Bottle attachment (6.1602.105)
Of PFA/PP, thread GL45
21 Canula (6.1819.020)
Of FEP, thread M6
22 Bottle with thread (6.1608.23)
Amber glass, thread GL45
23 Holding clamps (6.2043.005)
For reagent bottles
24 Storage vessel (6.1228.000)
For buret tips or electrodes
25 PTFE piston (6.1556.XXX)
with coupling
.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
26 Antidiffusion tip (6.1543.200)
Of ETFE/FEP, for titrations

2.2 Components of the 806 Exchange Unit ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
8￭￭￭￭￭￭￭￭ 806 Exchange Unit
27 Dosing tip open (6.1543.060)
of ETFE/FEP, for dosings
28 Link stopper (6.1446.030)
29 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
30 Data chip
On the underside of the buret

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806 Exchange Unit ￭￭￭￭￭￭￭￭ 9
3 Installation
3.1 Setting up the instrument
3.1.1 Packaging
The instrument is supplied in protective packaging together with the sepa-
rately packed accessories. Keep this packaging, as only this ensures safe
transportation of the instrument.
3.1.2 Checks
Immediately after receipt, check whether the shipment has arrived com-
plete and without damage by comparing it with the delivery note.
3.1.3 Location
The instrument has been developed for operation indoors and may not be
used in explosive environments.
Place the instrument in a location of the laboratory which is suitable for
operation and free of vibrations and which provides protection against
corrosive atmosphere and contamination by chemicals.
The instrument should be protected against excessive temperature fluctua-
tions and direct sunlight.
3.2 Start-up
3.2.1 Preparing the exchange unit
Proceed as follows:
1Mount the holding clamps in such a way that the reagent bottle rests
safely on the exchange unit.
2Check whether the reagent bottle contains solvent.
3Fill the adsorber tube with a suitable adsorber material.
CO 2 adsorption: Soda lime
KF reagent: Molecular sieve
If no special adsorber material is necessary, the adsorber tube may
also be used as dust filter when filled with cotton.
4Attach the filled adsorber tube onto the reagent bottle.

3.2 Start-up ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
10 ￭￭￭￭￭￭￭￭ 806 Exchange Unit
5Control, whether the tubing connections are fastened. Tighten the
tubing connection with the 6.2739.000 key if necessary.
NOTICE
Do not use any other aids! The threads of the tubing nipples and
the tubing openings may not be deformed.
6Write the name of the solvent in the reagent bottle on a colored
plate.
7Slide the plate into the labeling holder.
8Store the buret tip or the electrode in the two storage vessels.
Usage of original reagent bottles
You may eventually need a special bottle attachment or a thread adapter
in addition to the supplied 6.1602.105 standard bottle attachment:
Bottle attachment Order number
Bottles with GL45 thread Standard
Bottles with S40 thread 6.1602.115
Bottles with GL32 thread 6.1602.105 / 6.1618.000
Bottles with 28 mm thread 6.1602.105 / 6.1618.010
3.2.2 Attaching the exchange unit
Attach an 806 Exchange Unit as follows:
1Before attaching the exchange unit, check whether the stopcock can
be switched manually by the switching lever.
For attaching, the switching lever must be directed to the right (stop-
cock in dosing position). The arrow marking must point upwards.

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806 Exchange Unit ￭￭￭￭￭￭￭￭ 11
2Check the position of the piston rod on the underside of the
exchange unit.
The recess of the piston rod must be tight with the buret base and
the smooth surface with the opening must be directed to the rear.
3Correct the position of the piston rod with the 6.2739.010 key if
necessary.
NOTICE
In case of carelessly handling the 6.2739.010 key, the data chip of
the exchange unit may be damaged. Avoid touching the white
ceramic holder of the data chip!
4Attach the exchange unit from the front onto the control device and
push all the way to the rear, so that it snaps in and the LED Status
flashes slowly.
It must snap in audibly.

3.2 Start-up ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
12 ￭￭￭￭￭￭￭￭ 806 Exchange Unit
5If the exchange unit does not snap in, check the following:
Position of the piston rod
Stopcock position of the exchange unit
The switching lever must be directed to the right (stopcock in dosing
position). The arrow marking must point upwards (see step 1).
If the exchange unit is attached correctly, its initialization is being activated
by a micro switch which is triggered by the guide bolts of the exchange
unit. It is being recognized and the data is being read automatically from
the data chip.
The control device automatically rotates the stopcock and returns the
stopcock in dosing position.
After this, the LED Status on the control device lights up constantly.
3.2.3 Filling the tubings
The proceeding during the filling of the tubings of the exchange unit
depends on the control device and control software. Consult the corre-
sponding manual for manual dosing and filling.
The function Preparing or PREP of the control software is used to rinse
the cylinder and tubings of the exchange unit and fill them air bubble-free.
You should carry out this function before the first determination or once
per day.