Metrohm 942 Extension Module Vario LQH User manual

942 Extension Module Vario
942 Extension Module Vario LQH
Manual
8.942.8003EN / 2019-10-31

Metrohm AG
CH-9100 Herisau
Switzerland
Phone [phone]
Fax [phone]
[email protected]
www.metrohm.com
942 Extension Module Vario
942 Extension Module Vario LQH
2.942.0070
Manual
8.942.8003EN / 2019-10-31

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 LQH (2.942.0070) ￭￭￭￭￭￭￭￭ 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 ........................................................ 3
1.4 Safety instructions ................................................................ 4
1.4.1 General notes on safety ........................................................... 4
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 7
2.1 Front ...................................................................................... 7
2.2 Rear ........................................................................................ 8
2.3 Extension Module and 940 Professional IC Vario .............. 8
3 Installation 10
3.1 Installation diagram ........................................................... 10
3.2 Setting up the instrument .................................................. 11
3.2.1 Packaging .............................................................................. 11
3.2.2 Checks .................................................................................. 11
3.2.3 Location ................................................................................ 11
3.3 Base tray and bottle holder ............................................... 11
3.3.1 Basic information on base tray and bottle holder ................... 11
3.3.2 Mounting base tray and bottle holder (optional) .................... 12
3.4 Connecting the 10-port valve ............................................ 17
3.5 Peristaltic pump .................................................................. 18
3.5.1 Installing the peristaltic pump ................................................ 18
3.5.2 Mode of operation for the peristaltic pump ........................... 22
3.6 Installing the 6-port valve .................................................. 23
3.7 Mounting the accessories .................................................. 24
3.8 Connecting an Extension Module ..................................... 26
4 Start-up 27

Table of contents ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
IV ￭￭￭￭￭￭￭￭ 942 Extension Module Vario LQH (2.942.0070)
5 Operation and maintenance 28
5.1 Servicing the door .............................................................. 28
5.2 Peristaltic pump .................................................................. 28
5.2.1 Notes on operating the peristaltic pump ................................ 28
5.2.2 Servicing the peristaltic pump ................................................ 29
6 Troubleshooting 31
6.1 Problems and their solutions ............................................. 31
7 Mode of operation 32
7.1 10-port valve ....................................................................... 32
7.2 Transfer tubing ................................................................... 34
7.3 Peristaltic pump and injection valve ................................. 35
8 Technical specifications 37
8.1 Reference conditions .......................................................... 37
8.2 Ambient conditions ............................................................ 37
8.3 Housing ............................................................................... 37
8.4 Weight ................................................................................. 38
8.5 10-port valve ....................................................................... 38
8.6 Peristaltic pump .................................................................. 38
8.7 6-port valve ......................................................................... 38
8.8 Interfaces ............................................................................. 39
9 Accessories 40
Index 41

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of figures
942 Extension Module Vario LQH (2.942.0070) ￭￭￭￭￭￭￭￭ V
Table of figures
Figure 1 Front ................................................................................................. 7
Figure 2 Rear .................................................................................................. 8
Figure 3 Proposed setup ................................................................................. 9
Figure 4 Installation diagram ......................................................................... 10
Figure 5 Removing the base tray ................................................................... 13
Figure 6 Mounting the base tray ................................................................... 14
Figure 7 Removing the bottle holder ............................................................. 15
Figure 8 Mounting the bottle holder ............................................................. 16
Figure 9 Peristaltic pump ............................................................................... 22
Figure 10 6-port valve – Positions ................................................................... 23
Figure 11 Pump tubing connection – Replacing the filter ................................. 30
Figure 12 10-port valve – Ports ....................................................................... 32
Figure 13 Normal valve switchover and with a secured port ............................ 33
Figure 14 Transfer tubing (6.1562.160) ........................................................... 34
Figure 15 Measuring the volume – Filling the sample loop .............................. 35
Figure 16 Measuring the volume – Aspirating a sample segment ..................... 36

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
942 Extension Module Vario LQH (2.942.0070) ￭￭￭￭￭￭￭￭ 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 LQH expands a 940 Professional IC
Vario by adding extensive options for inline sample preparation and liquid
handling. Up to 6 auxiliary solutions can be provided in the instrument.
The 942 Extension Module Vario LQH enables guard column reactions, pH
adjustments and much more.
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 LQH consists of the following compo-
nents:
10-port valve
The 10-port valve is used during sample preparation and serves as a unit
for switching between different liquids.
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 LQH (2.942.0070)
1.2 Intended use
Using a 942 Extension Module Vario LQH allows a 940 Professional IC
Vario to be expanded to utilize a wide variety of additional sample prepa-
ration options without having to reconfigure the instrument in between.
These could include calibration, ion exchange, guard column reactions or
a combination of several options.
This instrument is suitable for processing chemicals and flammable sam-
ples. Usage of the 942 Extension Module Vario LQH therefore requires the
user to have basic knowledge and experience in handling toxic and caustic
substances. Knowledge regarding the application of fire prevention meas-
ures 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 LQH
(2.942.0070), its assembly and connection to the IC instrument, as well as
the installation, operation and maintenance of individual modules. Techni-
cal specifications, troubleshooting and information concerning 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 LQH, nor
does it describe the capillary connections that go beyond the 942 Exten-
sion Module Vario LQH. Refer to the manual for the 940 Professional 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 Introduction
942 Extension Module Vario LQH (2.942.0070) ￭￭￭￭￭￭￭￭ 3
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.
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 ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
4￭￭￭￭￭￭￭￭ 942 Extension Module Vario LQH (2.942.0070)
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.
1.4.2 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).

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
942 Extension Module Vario LQH (2.942.0070) ￭￭￭￭￭￭￭￭ 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.
1.4.3 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.

1.4 Safety instructions ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
6￭￭￭￭￭￭￭￭ 942 Extension Module Vario LQH (2.942.0070)
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.

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942 Extension Module Vario LQH (2.942.0070) ￭￭￭￭￭￭￭￭ 7
2 Overview of the instrument
2.1 Front
Figure 1 Front
1Peristaltic pump 210-port valve
3Injection valve 4Standby indicator

2.2 Rear ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
8￭￭￭￭￭￭￭￭ 942 Extension Module Vario LQH (2.942.0070)
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 con-
nected.
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 Overview of the instrument
942 Extension Module Vario LQH (2.942.0070) ￭￭￭￭￭￭￭￭ 9
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)
NOTICE
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).

3.1 Installation diagram ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
10 ￭￭￭￭￭￭￭￭ 942 Extension Module Vario LQH (2.942.0070)
3 Installation
3.1 Installation diagram
Depending on the application, the peristaltic pump, injection valve and
10-port valve of the 942 Extension Module Vario LQH can be installed dif-
ferently.
The installation shown below only represents one of many possible instal-
lation setups. The graphic arrangement of the modules corresponds to the
front of the Extension Module. The liquid containers and components of
the IC instrument are not shown in the diagram.
Figure 4 Installation diagram
1Connection to a Dosino 2Transfer tubing connection – 10-port
valve
The transfer tubing is connected to the cen-
tral port of the 10-port valve.
3Sample aspiration capillary 4Peristaltic pump connection – Injection
valve on the extension module
5Capillary to the waste container 610-port valve connection – Injection
valve on the extension module

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942 Extension Module Vario LQH (2.942.0070) ￭￭￭￭￭￭￭￭ 11
710-port valve connection – Injection
valve on the IC instrument
810-port valve connection – Any auxili-
ary solution and vessels
9Capillary to the container with transfer
solution
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 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.
3.3 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 if one of the
following instruments is to be mounted on or under a 940 Professional IC
Vario:
￭One or more 942 Extension Module Vario
￭Or another instrument with the same-sized footprint

3.3 Base tray and bottle holder ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
12 ￭￭￭￭￭￭￭￭ 942 Extension Module Vario LQH (2.942.0070)
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. To install an Extension Module on the ion chromatograph,
remove the bottle holder and put it back on top of the topmost instru-
ment. To install an Extension Module under the ion chromatograph,
remove the base tray and set it under the lowest instrument.
3.3.2.1 Removing/mounting the base tray
Remove the base tray to install another instrument under the IC instru-
ment.
CAUTION
Do not pinch capillaries or leak sensor cables
Capillaries are fed through the guide ducts between the base tray and
the instrument. Pinches in the leak sensor cable or the capillaries may
lead to malfunctions.
￭Unplug the leak sensor cable before you remove the base tray.
￭Remove all the capillaries from the capillary ducts before you remove
the base tray.
Removing the base tray
Prerequisites
￭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.
Accessories
￭3 mm hex key (6.2621.100)