Metrohm 843 User manual

843 Pump Station
with peristaltic pumps
Manual
8.843.8003EN/2019-11-29

Metrohm AG
CH-9100 Herisau
Switzerland
Phone [phone]
Fax [phone]
[email protected]
www.metrohm.com
843 Pump Station
with peristaltic pumps
Manual
8.843.8003EN/2019-11-29

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
843 Pump Station with peristaltic pumps ￭￭￭￭￭￭￭￭ III
Table of contents
1 Introduction 1
1.1 Instrument description ......................................................... 1
1.2 Sales versions ........................................................................ 1
1.3 Intended use ......................................................................... 1
1.4 About the documentation ................................................... 2
1.4.1 Symbols and conventions ........................................................ 2
1.5 Safety instructions ................................................................ 3
1.5.1 General notes on safety ........................................................... 3
1.5.2 Personnel safety ....................................................................... 3
1.5.3 Electrical safety ........................................................................ 4
1.5.4 Tubing connections ................................................................. 5
1.5.5 Working with liquids ................................................................ 5
1.5.6 Working with flammable liquids and chemicals ........................ 6
1.5.7 Chemical resistance ................................................................. 6
1.5.8 Recycling and disposal ............................................................. 6
2 Overview of the instrument 7
2.1 Front of the instrument ........................................................ 7
2.2 Rear of the instrument ......................................................... 8
2.3 Peristaltic pump .................................................................... 9
2.4 Safety shield ........................................................................ 10
3 Installation 11
3.1 Setting up the instrument .................................................. 11
3.1.1 Packaging .............................................................................. 11
3.1.2 Checks .................................................................................. 11
3.1.3 Location ................................................................................ 11
3.2 Mounting the tubing .......................................................... 11
3.2.1 Pump tubing ......................................................................... 11
3.2.2 Inlet and outlet tubing ........................................................... 12
3.2.3 Mounting the safety shield .................................................... 13
3.3 Connecting control instruments ........................................ 15
3.4 Connecting the instrument to the power grid ................. 19
4 Operation 21
5 Operation and maintenance 22
5.1 General notes ...................................................................... 22
5.1.1 Care ...................................................................................... 22

Table of contents ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
IV ￭￭￭￭￭￭￭￭ 843 Pump Station with peristaltic pumps
5.1.2 Maintenance by Metrohm Service .......................................... 22
5.2 Pump .................................................................................... 23
5.3 Tubing .................................................................................. 23
5.3.1 Safety instructions ................................................................. 23
5.3.2 Selection of pump tubings ..................................................... 23
5.3.3 Tubing replacement and service life ....................................... 24
5.3.4 Suitability test for tubing ........................................................ 24
6 Troubleshooting 26
6.1 Problems .............................................................................. 26
7 Appendix 27
7.1 Remote interface ................................................................ 27
7.1.1 Pin assignment of the remote interface .................................. 27
8 Technical specifications 29
8.1 Peristaltic pump .................................................................. 29
8.2 Power connection ............................................................... 29
8.3 Ambient temperature ......................................................... 29
8.4 Reference conditions .......................................................... 30
8.5 Dimensions .......................................................................... 30
8.6 Interfaces ............................................................................. 30
9 Accessories 31
Index 32

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of figures
843 Pump Station with peristaltic pumps ￭￭￭￭￭￭￭￭ V
Table of figures
Figure 1 Front 843 Pump Station with peristaltic pumps .................................. 7
Figure 2 Rear 843 Pump Station with peristaltic pumps ................................... 8
Figure 3 Peristaltic pump ................................................................................. 9
Figure 4 Rear of the safety shield .................................................................. 10
Figure 5 Remote connection 869 — 843 — 8xx Titrino plus ......................... 16
Figure 6 Remote connection 8xx Dosimat plus — 869 — 843 — 8xx Titrino
plus ................................................................................................. 16
Figure 7 Remote connection 869 — 843 — 8xx Titrino plus — 8xx Dosimat
plus ................................................................................................. 17
Figure 8 Remote connection 863 — 843 — 797 .......................................... 17
Figure 9 Remote connection 838 — 843 — 797 .......................................... 18
Figure 10 Remote connection 814/815 — 843 ............................................... 18
Figure 11 Remote connection Remote Box — 843 .......................................... 19
Figure 12 Pin assignment of remote socket and plug ....................................... 27

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
843 Pump Station with peristaltic pumps ￭￭￭￭￭￭￭￭ 1
1 Introduction
1.1 Instrument description
The 843 Pump Station has the following characteristics:
￭Two peristaltic pumps.
￭Two remote connectors:
– Remote 1 for connecting instruments that control pumps.
– Remote 2 for connecting other instruments.
￭An integrated power supply unit (100 – 240 V) which runs the peristal-
tic pumps.
1.2 Sales versions
The 843 Pump Station is available in three different sales versions:
2.843.0120 Standard instrument
2.843.0130 Standard instrument, with special accessories for
automatic emptying of the titration beaker and
cleaning the titration equipment while working
with sample changers.
2.843.0140 Standard instrument with special accessories for
VA applications.
1.3 Intended use
The 843 Pump Station is designed for usage in automated systems in ana-
lytical laboratories. It is not suitable for usage in biochemical, biological or
medical environments in its basic equipment version.

1.4 About the documentation ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
2￭￭￭￭￭￭￭￭ 843 Pump Station with peristaltic pumps
1.4 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.
1.4.1 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.
Caution
This symbol draws attention to a possible damage of
instruments or instrument parts.
Note
This symbol marks additional information and tips.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
843 Pump Station with peristaltic pumps ￭￭￭￭￭￭￭￭ 3
1.5 Safety instructions
1.5.1 General notes on safety
WARNING
Operate this instrument only according to the information contained in
this documentation.
This instrument left the factory in a flawless state in terms of technical
safety. To maintain this state and ensure non-hazardous operation of the
instrument, the following instructions must be observed carefully.
1.5.2 Personnel safety
WARNING
Wear protective glasses and working clothes suitable for laboratory
work while operating the 843 Pump Station. It is also advisable to wear
gloves when caustic liquids are used or in situations where glass vessels
could break.
WARNING
Install the safety shield supplied with the equipment whenever using
the instrument.
The 843 Pump Station cannot be operated without a safety shield.
Any manipulations in order to avoid the safety shutdown may not be
carried out.
WARNING
Personnel are not permitted to reach into the working area of the
instrument while operations are running!
A considerable risk of injury exists for the user.

1.5 Safety instructions ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
4￭￭￭￭￭￭￭￭ 843 Pump Station with peristaltic pumps
WARNING
In the event of a possible jamming of a drive, the power plug must be
pulled out of the socket immediately. Do not attempt to free jammed
sample vessels or other parts while the instrument is switched on. Jam-
ming can only be cleared when the instrument is in a de-energized
state; this action is generally associated with a considerable risk of
injury.
WARNING
The 843 Pump Station is not suitable for usage in biochemical, biologi-
cal or medical environments in its basic equipment version.
Appropriate protective measures must be implemented in the event
that potentially infectious samples or reagents are being processed.
1.5.3 Electrical safety
The electrical safety when working with the instrument is ensured as part
of the international standard IEC 61010.
WARNING
Only personnel qualified by Metrohm are authorized to carry out service
work on electronic components.
WARNING
Never open the housing of the instrument. The instrument could be
damaged by this. There is also a risk of serious injury if live components
are touched.
There are no parts inside the housing which can be serviced or replaced
by the user.
Supply voltage
WARNING
An incorrect supply voltage can damage the instrument.
Only operate this instrument with a supply voltage specified for it (see
rear panel of the instrument).

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
843 Pump Station with peristaltic pumps ￭￭￭￭￭￭￭￭ 5
Protection against electrostatic charges
WARNING
Electronic components are sensitive to electrostatic charges and can be
destroyed by discharges.
Do not fail to pull the power cord out of the power socket before you
set up or disconnect electrical plug connections at the rear of the
instrument.
1.5.4 Tubing connections
CAUTION
Leaks in tubing connections are a safety risk. Tighten all connections
well by hand. Avoid applying excessive force to tubing connections.
Damaged tubing ends lead to leakage. Suitable tools can be used for
disconnecting connections.
Regularly check the leak-tightness of the tubings. If the instrument is
used mainly in unattended operation, then weekly inspections are man-
datory.
1.5.5 Working with liquids
CAUTION
Periodically check all system connections for leaks. Observe the relevant
regulations in respect to working with flammable and/or toxic fluids
and their disposal.

1.5 Safety instructions ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
6￭￭￭￭￭￭￭￭ 843 Pump Station with peristaltic pumps
1.5.6 Working with flammable liquids 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 (e.g. fume cup-
board).
￭Keep all sources of flame far from the workplace.
￭Clean up spilled liquids and solids immediately.
￭Follow the safety instructions of the chemical manufacturer.
1.5.7 Chemical resistance
CAUTION
Before utilizing any particularly aggressive media, it is imperative that
you determine whether or not the parts of the instrument that have
media contact are resistant to them.
Above all, the proper tubing material must be selected.
1.5.8 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 Overview of the instrument
843 Pump Station with peristaltic pumps ￭￭￭￭￭￭￭￭ 7
2 Overview of the instrument
2.1 Front of the instrument
843 Pump Station
Pump 1
Pump 2
1
2
3
5
8
7
6
8
7
4
Figure 1 Front 843 Pump Station with peristaltic pumps
1Pump 1
For switching peristaltic pump 1 on and off.
2Pump 2
For switching peristaltic pump 2 on and off.
3Mains switch/Emergency stop switch
For switching the instrument on and off.
4Tubing guide
For bundling up the tubings.
5Peristaltic pump 1 with safety shield
For rinsing.
6Peristaltic pump 2 with safety shield
For aspiration.
7Contact pin with screw
Arranges the safety shutdown of the peri-
staltic pump with a photoelectric barrier.
8Tab
For attaching the safety shield.

2.2 Rear of the instrument ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
8￭￭￭￭￭￭￭￭ 843 Pump Station with peristaltic pumps
2.2 Rear of the instrument
1
2
3
4
5
6
Figure 2 Rear 843 Pump Station with peristaltic pumps
1Tubing guide
For bundling up the tubings.
2Bore hole
Additional hole for screwing in the tubing
guide in situations where Pump Station is to
be operated in a lying position.
3Remote 1
For connecting an instrument that controls
the pump.
4Remote 2
For connecting other system instruments.
5Mains connection
For connecting the Pump Station to the
mains supply.
6Type plate
Contains specifications concerning mains
voltage, instrument type and serial number.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 2 Overview of the instrument
843 Pump Station with peristaltic pumps ￭￭￭￭￭￭￭￭ 9
2.3 Peristaltic pump
5
Figure 3 Peristaltic pump
1Tube clamp
For fixing the tubing in place with the tubing
olive.
2Fixing lever with clamping screw
For fixing the pressure clip in place and for
regulating the flow of liquid.
3Pressure clamp
For fixing the tubing in place.
4Tab
For attaching the safety shield.
5Guidance with sensor
For inserting the contact pin.

2.4 Safety shield ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
10 ￭￭￭￭￭￭￭￭ 843 Pump Station with peristaltic pumps
2.4 Safety shield
1
Figure 4 Rear of the safety shield
1Contact pin
Arranges the safety shutdown of the peri-
staltic pump with a photoelectric barrier.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 3 Installation
843 Pump Station with peristaltic pumps ￭￭￭￭￭￭￭￭ 11
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 Mounting the tubing
3.2.1 Pump tubing
PharMed® tubing is recommended as the pump tubing for the peristaltic
pump.
Mount the pump tubing as follows:
1Cut the pump tubing to a length of approx. 16 cm.
2Insert the included tubing olives into the two tubing ends.
3Where appropriate, use additional cable ties to fasten the tubing on
both ends at the tubing olives.

3.2 Mounting the tubing ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
12 ￭￭￭￭￭￭￭￭ 843 Pump Station with peristaltic pumps
This prevents liquid from leaking under excessive pressure.
4Insert the pump tubing into the pump head as shown in the figure.
5Use the tubing clamps to fix the tubing in place.
Make sure the tubing is as centered on the roller as possible.
6Apply pressure to the pressure clamp and clamp tightly with the lock-
ing lever (see chapter 2.3, page 9).
7Tighten the clamping screw so that the pump tubing cannot slip and
the liquid is pumped with a uniform flow.
If necessary, the clamping screw can be readjusted while the pump is
running.
3.2.2 Inlet and outlet tubing
Two different types of tubings are available as inlet and outlet tubing.
Both of them are included in the scope of delivery :
￭PVC tubing (6.1801.120), 2 x 2 m
￭PTFE tubing (6.1812.000), 1 x 4 m
The question of which of the two types of tubing you should use is pri-
marily dependent on the type of solvent used. PVC tubing is more flexible
and has the advantage of making less noise during the pumping opera-
tion.
Mount the inlet and outlet tubing as follows:
1Cut the inlet and outlet tubing to the appropriate lengths.
2Mount them to the screw connectors of the tubing olives of the
pump tubing.