Metrohm 942 Extension Module Vario Prep 2 User manual

942 Extension Module Vario
942 Extension Module Vario Prep 2
Manual
8.942.8001EN / 2017-08-31

Metrohm AG
CH-9100 Herisau
Switzerland
Phone [phone]
Fax [phone]
[email protected]
www.metrohm.com
942 Extension Module Vario
942 Extension Module Vario Prep 2
2.942.0020
Manual
8.942.8001EN / 2017-08-31 zst

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
942 Extension Module Vario Prep 2 (2.942.0020) ￭￭￭￭￭￭￭￭ III
Table of contents
1 Introduction 1
1.1 Instrument description ......................................................... 1
1.2 Intended use ......................................................................... 2
1.3 About the documentation ................................................... 2
1.3.1 Content and scope .................................................................. 2
1.3.2 Symbols and conventions ........................................................ 2
1.4 Safety instructions ................................................................ 3
1.4.1 General notes on safety ........................................................... 3
1.4.2 Electrical safety ........................................................................ 4
1.4.3 Tubing and capillary connections ............................................. 5
1.4.4 Flammable solvents and chemicals ........................................... 5
1.4.5 Recycling and disposal ............................................................. 5
2 Overview of the instrument 6
2.1 Front ...................................................................................... 6
2.2 Rear ........................................................................................ 7
2.3 Extension Module and 940 Professional IC Vario .............. 7
3 Installation 9
3.1 Installation diagram ............................................................. 9
3.2 Setting up the instrument .................................................. 10
3.2.1 Packaging .............................................................................. 10
3.2.2 Checks .................................................................................. 10
3.2.3 Location ................................................................................ 10
3.3 Base tray and bottle holder ............................................... 10
3.3.1 Basic information on base tray and bottle holder ................... 10
3.3.2 Mounting base tray and bottle holder (optional) .................... 11
3.4 Peristaltic pump .................................................................. 16
3.4.1 Installing the peristaltic pump ................................................ 16
3.4.2 Mode of operation for the peristaltic pump ........................... 20
3.5 Installing the 6-port valve .................................................. 21
3.6 Connecting an Extension Module ..................................... 22
4 Start-up 23
5 Operation and maintenance 24
5.1 Servicing the door .............................................................. 24
5.2 Peristaltic pump .................................................................. 24
5.2.1 Notes on operating the peristaltic pump ................................ 24

Table of contents ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
IV ￭￭￭￭￭￭￭￭ 942 Extension Module Vario Prep 2 (2.942.0020)
5.2.2 Servicing the peristaltic pump ................................................ 25
6 Quality management and qualification with Metrohm 27
7 Troubleshooting 28
7.1 Problems and their solutions ............................................. 28
8 Technical specifications 29
8.1 Reference conditions .......................................................... 29
8.2 Ambient conditions ............................................................ 29
8.3 Housing ............................................................................... 29
8.4 Weight ................................................................................. 30
8.5 Peristaltic pump .................................................................. 30
8.6 6-port valve ......................................................................... 30
8.7 Interfaces ............................................................................. 30
9 Accessories 31
Index 32

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of figures
942 Extension Module Vario Prep 2 (2.942.0020) ￭￭￭￭￭￭￭￭ V
Table of figures
Figure 1 Front ................................................................................................. 6
Figure 2 Rear .................................................................................................. 7
Figure 3 Proposed setup ................................................................................. 8
Figure 4 Installation diagram – inline matrix elimination .................................. 9
Figure 5 Peristaltic pump ............................................................................... 20
Figure 6 6-port valve – Positions ................................................................... 21
Figure 7 Pump tubing connection – Replacing the filter ................................. 26

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
942 Extension Module Vario Prep 2 (2.942.0020) ￭￭￭￭￭￭￭￭ 1
1 Introduction
1.1 Instrument description
942 Extension Module Vario are extension modules used to expand exist-
ing 940 Professional IC Vario instruments with additional functions. Each
940 Professional IC Vario instrument can be expanded with up to 3 942
Extension Module Vario instruments.
The 942 Extension Module Vario Prep 2 can be used to expand a 940
Professional IC Vario by adding sample preparation options, such as matrix
elimination with transfer method or standard addition with preconcentra-
tion.
The 942 Extension Module Vario is operated using MagIC Net software,
just like the IC instrument. If a 942 Extension Module Vario is connected
to a 940 Professional IC Vario instrument, MagIC Net automatically
detects the 942 Extension Module Vario and checks its functional capabil-
ity. It controls and monitors the entire IC system including all connected
instruments; it evaluates the measured data and manages it in a database.
The 942 Extension Module Vario Prep 2 consists of the following compo-
nents:
Peristaltic pump
The peristaltic pump is used for pumping sample and auxiliary solutions. It
can rotate in both directions.
6-port valve
The 6-port valve mimics the injection valve in its design. It is used during
sample preparation. The 6-port valve serves as a switch-over point
between two different liquids, such as switching between sample and
auxiliary solution during Inline Matrix Elimination.

1.2 Intended use ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
2￭￭￭￭￭￭￭￭ 942 Extension Module Vario Prep 2 (2.942.0020)
1.2 Intended use
The 942 Extension Module Vario Prep 2 expands an IC system by adding
sample preparation options, such as inline dialysis.
This instrument is suitable for processing chemicals and flammable sam-
ples. Usage of the 942 Extension Module Vario Prep 2 therefore requires
the user to have basic knowledge and experience in handling toxic and
caustic substances. Knowledge regarding the application of fire prevention
measures prescribed for laboratories is also mandatory.
1.3 About the documentation
CAUTION
Read through this documentation carefully before putting the instru-
ment into operation. The documentation contains information and
warnings which the user must follow in order to ensure safe operation
of the instrument.
1.3.1 Content and scope
This document describes the 942 Extension Module Vario Prep 2
(2.942.0020), its assembly and connection to the IC instrument, as well as
the installation, operation and maintenance of individual components.
Information on technical specifications, troubleshooting, the scope of
delivery and optional accessories make up the rest of the manual.
However, this document does not describe the functions of a unit combin-
ing a 940 Professional IC Vario and 942 Extension Module Vario Prep 2,
nor does it describe the capillary connections that go beyond the 942
Extension Module Vario Prep 2. Refer to the manual for the 940 Professio-
nal IC Vario and Sample Processor in this regard.
Additional information concerning the configuration of MagIC Net can be
found in the online help for MagIC Net.
1.3.2 Symbols and conventions
The following symbols and formatting may appear 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.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
942 Extension Module Vario Prep 2 (2.942.0020) ￭￭￭￭￭￭￭￭ 3
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-threat-
ening 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 possible damage to
instruments or instrument parts.
NOTE
This symbol highlights additional information and
tips.
1.4 Safety instructions
1.4.1 General notes on safety
WARNING
This instrument may only be operated in accordance with the specifica-
tions in this documentation.
This instrument has 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.

1.4 Safety instructions ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
4￭￭￭￭￭￭￭￭ 942 Extension Module Vario Prep 2 (2.942.0020)
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 Introduction
942 Extension Module Vario Prep 2 (2.942.0020) ￭￭￭￭￭￭￭￭ 5
1.4.3 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.
1.4.4 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 (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.
1.4.5 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.

2.1 Front ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
6￭￭￭￭￭￭￭￭ 942 Extension Module Vario Prep 2 (2.942.0020)
2 Overview of the instrument
2.1 Front
Figure 1 Front
1Peristaltic pump 2Switching valve
3Standby indicator

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 2 Overview of the instrument
942 Extension Module Vario Prep 2 (2.942.0020) ￭￭￭￭￭￭￭￭ 7
2.2 Rear
12
Figure 2 Rear
1In connection
To connect the Extension Module to the IC
instrument or to a previous Extension Mod-
ule.
2Out connection
To connect an additional Extension Module.
2.3 Extension Module and 940 Professional IC Vario
The 942 Extension Module Vario units are fitted directly to the 940 Profes-
sional IC Vario and connected to it via the connection cable provided.
Extension modules have no power supply of their own, but rather draw
the electricity they require from the instrument to which they are connec-
ted.
Extension modules can be placed in 3 different ways:
￭Installed between the instrument and bottle holder (3-A).
￭Installed between the instrument and base tray (3-B).
￭Stacked next to the instrument (3-C). In this case, we recommend
ordering a separate base tray (6.2061.110) and a separate bottle
holder (6.2061.100) for the stack.

2.3 Extension Module and 940 Professional IC Vario ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
8￭￭￭￭￭￭￭￭ 942 Extension Module Vario Prep 2 (2.942.0020)
Figure 3 Proposed setup
AExtension module on top
Between the 940 Professional IC Vario and
the bottle holder.
BExtension module below
Between the base plate and the 940 Profes-
sional IC Vario.
CExtension module separately
Next to the 940 Professional IC Vario with its
own base plate and bottle holder.
Up to three extension modules can be connected to an 940 Professional
IC Vario. The following restrictions are to be taken into account:
Restrictions Together, the 940 Professional IC Vario and its extension modules must
not contain more than 4 identical components, this means that:
￭A maximum of 4 high-pressure pumps,
￭A maximum of 4 peristaltic pumps,
￭A maximum of 4 injection valves,
￭A maximum of 4 suppressors (MSM, incl. SPM),
BUT
￭Only a maximum of 3 degassers
￭And a maximum of 3 CO2 suppressors (MCS)
NOTE
If all four high-pressure pumps are being used simultaneously, then all
of them must not be operating with their maximum flow for long peri-
ods.
Position the Extension Module in such a way that the capillary connections
can be kept as short as possible. If several extension modules are being
used, they should all be installed at the same location above or below
each other. If this is not possible, extension modules that are farther apart
have to be connected together using a longer connecting cable
(6.2156.070).

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 3 Installation
942 Extension Module Vario Prep 2 (2.942.0020) ￭￭￭￭￭￭￭￭ 9
3 Installation
3.1 Installation diagram
Depending on the application, the peristaltic pump and the 6-port valve of
the 942 Extension Module Vario Prep 2 can be installed differently. Figure
4: Installation diagram – inline matrix elimination shows an example of
how the peristaltic pump and the 6-port valve can be used for inline
matrix elimination.
The graphic arrangement of the modules corresponds to the front of the
Extension Module. The liquid containers, Sample Processor and IC instru-
ment are not shown in the diagram.
Figure 4 Installation diagram – inline matrix elimination
1Aspiration capillary for transfer solu-
tion
2Tubing olive (6.2744.034)
With pressure screw.
3Pump tubing 4Pump tubing connection with locking
nut and filter (6.2744.180)
With pressure screw.
5Transfer solution
Connection to 6-port valve.
6Transfer solution
Connection to injection valve on ion chro-
matograph.
7Sample
Connection to Sample Processor.
8Sample
Connection to waste.

3.2 Setting up the instrument ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
10 ￭￭￭￭￭￭￭￭ 942 Extension Module Vario Prep 2 (2.942.0020)
3.2 Setting up the instrument
3.2.1 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.
3.2.2 Checks
Immediately after receipt, check whether the shipment has arrived com-
plete and without damage by comparing it with the delivery note.
3.2.3 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, free of vibrations, protected from corrosive atmosphere, and
contamination by chemicals.
The instrument should be protected against excessive temperature fluctua-
tions and direct sunlight.
3.3 Base tray and bottle holder
3.3.1 Basic information on base tray and bottle holder
The base tray (6.2061.110) and bottle holder (6.2061.100) protect IC
instruments from dust, dirt and leaking fluids. The supply bottles for eluent
and auxiliary solutions can be positioned neatly on the bottle holder.
In a complex IC system, several different instruments may be used, such as
an analyzer, an extension module and a detector. These instruments can
be set up in one or more stacks. We recommend that a base tray and bot-
tle holder be mounted for each stack of IC instruments.
The bottle holder and base tray must be removed or set up every time one
of the following instruments is to be mounted on or under a 940 Profes-
sional IC Vario:
￭One or more 942 Extension Module Vario.
￭Or another instrument with the same-sized footprint.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 3 Installation
942 Extension Module Vario Prep 2 (2.942.0020) ￭￭￭￭￭￭￭￭ 11
3.3.2 Mounting base tray and bottle holder (optional)
The base tray and bottle holder come fully assembled on a new ion chro-
matograph. If you wished to install an extension module on the ion chro-
matograph, you would have to remove the bottle holder and put it back
on top of the topmost instrument. If you wished to install an extension
module below the ion chromatograph, you would have to remove the
base tray and set it under the lowest instrument.
3.3.2.1 Removing/mounting the base tray
The base tray must be removed if you want to install another instrument
under the IC instrument.
CAUTION
Do not allow capillaries or leak sensor cables to be pinched!
Pinches in the leak sensor cable or the capillaries fed through the guide
ducts between the base tray and the instrument may lead to malfunc-
tions.
Unplug the leak sensor cable. Remove all of the capillaries from the
capillary ducts.
Removing the base tray
Before you can remove the base tray, the following preconditions must be
met:
￭The instrument is switched off.
￭The bottle holder is cleared.
￭All of the cable connections on the rear have been disconnected.
￭The capillaries are removed from the guide ducts between the instru-
ment and the base tray.
￭There are no loose parts in the instrument.
To remove the base tray, you need a 3 mm hex key (6.2621.100).

3.3 Base tray and bottle holder ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
12 ￭￭￭￭￭￭￭￭ 942 Extension Module Vario Prep 2 (2.942.0020)
123
1Tilt the instrument sideways and lay it down flat.
2Loosen the four cylinder screws with the 3 mm hex key and remove
them and their washers.
3Remove the base tray.
The base tray must always be mounted under the lowermost instrument
of the stack.
Mounting the base tray
Before you can mount the base tray, the following preconditions must be
met:
￭The instrument is switched off.
￭The bottle holder is cleared.
￭All of the cable connections on the rear have been disconnected.
￭There are no loose parts in the instrument.
￭The instrument is lying on its side, and the bottom surface is visible.
To mount the base tray, you need a 3 mm hex key (6.2621.100).