Metrohm 843 Pump Station User manual

843 Pump Station
with membrane pumps
Manual
8.843.8001EN/2019-11-29

Metrohm AG
CH-9100 Herisau
Switzerland
Phone [phone]
Fax [phone]
[email protected]
www.metrohm.com
843 Pump Station
with membrane pumps
Manual
8.843.8001EN/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 membrane pumps ￭￭￭￭￭￭￭￭ III
Table of contents
1 Introduction 1
1.1 Instrument description ......................................................... 1
1.2 Sales versions ........................................................................ 1
1.3 About the documentation ................................................... 1
1.3.1 Symbols and conventions ........................................................ 1
1.4 Safety instructions ................................................................ 2
1.4.1 General notes on safety ........................................................... 2
1.4.2 Electrical safety ........................................................................ 3
1.4.3 Working with liquids ................................................................ 4
1.4.4 Chemical resistance ................................................................. 4
1.4.5 Recycling and disposal ............................................................. 4
2 Overview of the instrument 5
2.1 Front of the instrument ........................................................ 5
2.2 Rear panel of the instrument ............................................... 6
2.3 Membrane pump .................................................................. 7
3 Installation 8
3.1 Setting up the instrument .................................................... 8
3.1.1 Packaging ................................................................................ 8
3.1.2 Checks .................................................................................... 8
3.1.3 Location .................................................................................. 8
3.2 Mounting the tubing ............................................................ 8
3.3 Connecting control instruments ........................................ 11
3.4 Connecting the instrument to the power grid ................. 14
4 Operation 15
5 Operation and maintenance 16
5.1 General notes ...................................................................... 16
5.1.1 Care ...................................................................................... 16
5.1.2 Maintenance by Metrohm Service .......................................... 16
5.2 Tubings ................................................................................ 17
6 Troubleshooting 18
6.1 Problems .............................................................................. 18
7 Appendix 19
7.1 Functioning of the membrane pump ................................ 19

Table of contents ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
IV ￭￭￭￭￭￭￭￭ 843 Pump Station with membrane pumps
7.2 Remote interface ................................................................ 20
7.2.1 Pin allocation of the remote interface .................................... 20
8 Technical specifications 22
8.1 Membrane pump ................................................................ 22
8.2 Power connection ............................................................... 22
8.3 Ambient temperature ......................................................... 22
8.4 Reference conditions .......................................................... 22
8.5 Dimensions .......................................................................... 23
8.6 Interfaces ............................................................................. 23
9 Accessories 24
Index 25

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of figures
843 Pump Station with membrane pumps ￭￭￭￭￭￭￭￭ V
Table of figures
Figure 1 Front of 843 Pump Station with membrane pumps ............................ 5
Figure 2 Rear 843 Pump Station with membrane pumps ................................. 6
Figure 3 Membrane pump with inlet and outlet tubing ................................... 7
Figure 4 Remote connection 869 — 843 — 8xx Titrino plus ......................... 11
Figure 5 Remote connection 8xx Dosimat plus — 869 — 843 — 8xx Titrino
plus ................................................................................................. 12
Figure 6 Remote connection 869 — 843 — 8xx Titrino plus — 8xx Dosimat
plus ................................................................................................. 12
Figure 7 Remote connection 863 — 843 — 797 .......................................... 13
Figure 8 Remote connection 838 — 843 — 797 .......................................... 13
Figure 9 Functioning of the membrane pump ............................................... 19
Figure 10 Pin allocation of remote socket and plug ......................................... 20

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
843 Pump Station with membrane pumps ￭￭￭￭￭￭￭￭ 1
1 Introduction
1.1 Instrument description
The 843 Pump Station has the following characteristics:
￭Two membrane 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 mem-
brane pumps.
1.2 Sales versions
The 843 Pump Station is available in three different sales versions:
2.843.0020 Standard instrument
2.843.0030 Standard instrument with special accessories for
automatic emptying of the titration beaker and
cleaning the titration equipment while working
with the 869 Compact Sample Changer.
2.843.0040 Standard instrument with special accessories for
VA applications.
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:

1.4 Safety instructions ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
2￭￭￭￭￭￭￭￭ 843 Pump Station with membrane pumps
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.
1.4 Safety instructions
1.4.1 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 Introduction
843 Pump Station with membrane pumps ￭￭￭￭￭￭￭￭ 3
1.4.2 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).
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.

1.4 Safety instructions ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
4￭￭￭￭￭￭￭￭ 843 Pump Station with membrane pumps
1.4.3 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.
1.4.4 Chemical resistance
CAUTION
The instrument must not be used for pumping organic solvents or
aqueous solutions containing solids.
CAUTION
Before using particularly aggressive media, be sure to clarify whether
the parts of the instrument coming into contact with the media are
resistant to them.
This concerns parts made of the following materials:
￭PTFE
Tubing 6.1812.000, pump parts
￭PVC
(Tubing 6.1801.120)
￭FFKM
Pump parts, valve parts
￭PP
Pump parts, valve parts
￭PVDF
Connection nipples of the tubing connectors, union nuts
1.4.5 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 membrane pumps ￭￭￭￭￭￭￭￭ 5
2 Overview of the instrument
2.1 Front of the instrument
Figure 1 Front of 843 Pump Station with membrane pumps
1Pump 1
For switching membrane pump 1 on and
off.
2Pump 2
For switching membrane pump 2 on and
off.
3Mains switch/Emergency stop switch
For switching the instrument on and off.
4Tubing guide
For fixing the tubings in place.
5Membrane pump 1
For rinsing.
6Membrane pump 2
For aspiration.

2.2 Rear panel of the instrument ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
6￭￭￭￭￭￭￭￭ 843 Pump Station with membrane pumps
2.2 Rear panel of the instrument
1
2
3
4
5
6
Figure 2 Rear 843 Pump Station with membrane pumps
1Tubing guide
For fixing the tubings in place.
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 socket
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 membrane pumps ￭￭￭￭￭￭￭￭ 7
2.3 Membrane pump
1
2
3
4
5
6
7
6
8
Figure 3 Membrane pump with inlet and outlet tubing
1Outlet tubing (e. g. 6.1812.000) 2Union nut
3Valve opening with protective cap 4Specification of flow direction
5Inlet tubing (e. g. 6.1812.000) 6Tube connection
7Valve 8Pump head

3.1 Setting up the instrument ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
8￭￭￭￭￭￭￭￭ 843 Pump Station with membrane pumps
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
Two different types of tubing are available as inlet and outlet tubing, both
of which are included in the scope of delivery (see chapter 9, page 24):
￭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 therefore has the advantage of making less noise during the pumping
operation.
If your application allows, mount PVC tubing at least as outlet tubing (3-1)
because the valve (3-7) in particular can generate loud pump noise.
Mounting the tubing
Mount the tubing as follows:
1Cut the inlet and outlet tubing to the appropriate lengths.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 3 Installation
843 Pump Station with membrane pumps ￭￭￭￭￭￭￭￭ 9
2Unscrew the union nut on both tubing connectors of the membrane
pump.
3Pull the union nut onto the tubing end to be fastened.
4Mount the inlet and outlet tubing on the connection nipples of the
tubing connectors.

3.2 Mounting the tubing ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
10 ￭￭￭￭￭￭￭￭ 843 Pump Station with membrane pumps
The tubing absolutely must be pushed up to the limit stop so that the
tubing connections are secure.
5Put the union nuts on the tubing connector and screw them tightly
to ensure a secure tubing connection.
To fasten the PTFE tubing in place, you may have to widen their
openings with a pointed object (e.g. using a Phillips screwdriver). You
can use a piece of sandpaper to make PTFE tubing easier to handle.
6Hold the inlet and outlet tubing together with a cable tie.
7Put the tubing through the tubing guide to fix them in place.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 3 Installation
843 Pump Station with membrane pumps ￭￭￭￭￭￭￭￭ 11
3.3 Connecting control instruments
Various options for connecting different instruments to the 843 Pump Sta-
tion are shown below. Instruments which control the pumps of the Pump
Station are connected to Remote 1, while all other instruments are con-
nected to Remote 2. The figures also contain the order numbers of the
required cables.
Example 1
Connection of a Compact Sample Changer (Remote 1) and a Titrino plus
(Remote 2).
6.2141.230 6.2141.230
869 Compact Sample Changer
843 Pump Station
Titrino plus
Figure 4 Remote connection 869 — 843 — 8xx Titrino plus
Example 2
Connection of a Dosimat plus, a Compact Sample Changer (Remote 1)
and a Titrino plus (Remote 2).

3.3 Connecting control instruments ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
12 ￭￭￭￭￭￭￭￭ 843 Pump Station with membrane pumps
6.2141.230 6.2141.230
6.2141.240
6.2141.260
869 Compact Sample Changer
843 Pump Station
Dosimat plus
Titrino plus
Figure 5 Remote connection 8xx Dosimat plus — 869 — 843 — 8xx
Titrino plus
or
Connection of a Compact Sample Changer (Remote 1), a Titrino plus and
a Dosimat plus (both to Remote 2).
6.2141.230 6.2141.230
6.2141.240
6.2141.260
869 Compact Sample Changer
843 Pump Station
Dosimat plus
Titrino plus
Figure 6 Remote connection 869 — 843 — 8xx Titrino plus — 8xx
Dosimat plus
Example 3
Connection of a Compact Autosampler (Remote 2) and a VA Compu-
trace (Remote 1).