Metrohm 942 Extension Module Vario HPG User manual

942 Extension Module Vario
942 Extension Module Vario HPG
Manual
8.942.8002EN / 2020-03-17

Metrohm AG
CH-9100 Herisau
Switzerland
Phone [phone]
Fax [phone]
[email protected]
www.metrohm.com
942 Extension Module Vario
942 Extension Module Vario HPG
2.942.0040
Manual
8.942.8002EN / 2020-03-17

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 HPG (2.942.0040) ￭￭￭￭￭￭￭￭ 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 Transport locking screws ................................................... 10
3.4 Base tray and bottle holder ............................................... 11
3.4.1 Basic information on base tray and bottle holder ................... 11
3.4.2 Mounting base tray and bottle holder (optional) .................... 11
3.5 Connecting the eluent bottle ............................................. 16
3.6 Connecting the eluent degasser ........................................ 20
3.6.1 Connecting the vacuum pump(s) ........................................... 20
3.7 Installing the high-pressure pump .................................... 22
3.8 Installing an inline filter ..................................................... 22
3.9 Installing the pulsation absorber ...................................... 23
3.10 Connecting an Extension Module ..................................... 24
4 Start-up 25

Table of contents ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
IV ￭￭￭￭￭￭￭￭ 942 Extension Module Vario HPG (2.942.0040)
5 Operation and maintenance 26
5.1 Servicing the door .............................................................. 26
5.2 Handling the eluent ............................................................ 26
5.2.1 Manufacturing eluent ............................................................ 26
5.2.2 Changing the eluent .............................................................. 27
5.3 Servicing the eluent degasser ........................................... 27
5.4 Notes on operating the high-pressure pump ................... 28
5.5 Servicing the high-pressure pump .................................... 29
5.6 Servicing the inline filter .................................................... 42
5.7 Servicing the pulsation absorber ...................................... 45
6 Troubleshooting 46
6.1 Problems and their solutions ............................................. 46
7 Technical specifications 48
7.1 Reference conditions .......................................................... 48
7.2 Ambient conditions ............................................................ 48
7.3 Housing ............................................................................... 48
7.4 Weight ................................................................................. 48
7.5 Eluent degasser .................................................................. 49
7.6 Interfaces ............................................................................. 49
8 Accessories 50
Index 51

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of figures
942 Extension Module Vario HPG (2.942.0040) ￭￭￭￭￭￭￭￭ V
Table of figures
Figure 1 Front ................................................................................................. 6
Figure 2 Rear .................................................................................................. 7
Figure 3 Proposed setup ................................................................................. 8
Figure 4 Installation diagram – Gradient .......................................................... 9
Figure 5 Removing the base tray ................................................................... 12
Figure 6 Mounting the base tray ................................................................... 13
Figure 7 Removing the bottle holder ............................................................. 14
Figure 8 Mounting the bottle holder ............................................................. 15
Figure 9 Installing the eluent bottle cap ........................................................ 16
Figure 10 Installing tubing weighting and aspiration filter ................................ 18
Figure 11 Connecting the vacuum pump ........................................................ 21
Figure 12 High-pressure pump with purge valve .............................................. 22
Figure 13 Pulsation absorber ........................................................................... 23
Figure 14 High-pressure pump – Parts ............................................................. 29
Figure 15 High-pressure pump – Cross-section ................................................ 36
Figure 16 Tool for piston seal (6.2617.010) ..................................................... 36
Figure 17 Removing the piston cartridge from the pump head ........................ 37
Figure 18 Inserting the piston seal into the tool ............................................... 38
Figure 19 Parts of the piston cartridge ............................................................ 39
Figure 20 Inline filter – Removing the filter ...................................................... 43

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
942 Extension Module Vario HPG (2.942.0040) ￭￭￭￭￭￭￭￭ 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 HPG enables an additional "iPump"
IC high-pressure pump to be installed into a Professional IC system.
Thanks to the 942 Extension Module Vario HPG, an isocratic 940 Profes-
sional IC Vario system can be expanded into a quaternary high-pressure
gradient system. This means more flexibility for configuring the IC system
that is needed.
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 HPG consists of the following compo-
nents:
Eluent degasser
The eluent degasser removes gas bubbles and dissolved gases from the
eluent.
High-pressure pump
The intelligent and low-pulsation high-pressure pump pumps the eluent
through the IC system. It is equipped with a chip where its technical speci-
fications and "life history" (operating hours, service data, etc.) are stored.
Inline filter
Inline filters protect the separation column reliably from potential contami-
nation from the eluent. The filter pads with 2 µm pore size can be
replaced quickly and easily. They remove particles from the solutions, such
as bacteria and algae.
Pulsation absorber
The pulsation absorber protects the separation column from damage
caused by pressure fluctuations, e.g. when the injection valve is switched,
and reduces interfering pulsations during highly sensitive measurements.

1.2 Intended use ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
2￭￭￭￭￭￭￭￭ 942 Extension Module Vario HPG (2.942.0040)
1.2 Intended use
This instrument is suitable for processing chemicals and flammable sam-
ples. Usage of the 942 Extension Module Vario HPG 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 HPG
(2.942.0040), 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 HPG, nor
does it describe the capillary connections that go beyond the 942 Exten-
sion Module Vario HPG. 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.
1.3.2 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.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
942 Extension Module Vario HPG (2.942.0040) ￭￭￭￭￭￭￭￭ 3
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
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 Safety instructions ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
4￭￭￭￭￭￭￭￭ 942 Extension Module Vario HPG (2.942.0040)
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 HPG (2.942.0040) ￭￭￭￭￭￭￭￭ 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 HPG (2.942.0040)
2 Overview of the instrument
2.1 Front
Figure 1 Front
1High-pressure pump
See Chapter 3.7.
2Eluent degasser
See Chapter 3.6.
3Inline filter
See Chapter 3.8.
4Pulsation absorber
See Chapter 3.9.
5Purge valve
See Chapter 3.7.
6Coupling (6.2744.230)
For connecting the eluent aspiration tubing.
7Standby indicator

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 2 Overview of the instrument
942 Extension Module Vario HPG (2.942.0040) ￭￭￭￭￭￭￭￭ 7
2.2 Rear
Made by Metrohm Herisau Switzerland
Out
In
Transport security screws
to Vacuum
234
1
Figure 2 Rear
1Transport locking screws 2"In" connection
For connecting the Extension Module to the
IC instrument or to a previous Extension
Module.
3"Out" connection
For connecting an additional Extension
Module.
4"to Vacuum" connection
For connecting the vacuum chamber of the
Extension Module to the vacuum chamber
of the IC instrument.
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.

2.3 Extension Module and 940 Professional IC Vario ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
8￭￭￭￭￭￭￭￭ 942 Extension Module Vario HPG (2.942.0040)
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 Installation
942 Extension Module Vario HPG (2.942.0040) ￭￭￭￭￭￭￭￭ 9
3 Installation
3.1 Installation diagram
The 942 Extension Module Vario HPG can be used as an additional pump
for a high-pressure gradient system, for example.
Figure : High-pressure gradient system shows the capillary connections of
the 942 Extension Module Vario HPG used as part of a high-pressure gra-
dient system.
The graphic arrangement of the modules corresponds to the front of the
Extension Module. The liquid containers are not shown in the diagram.
Some of the capillaries are already pre-installed at the time the instrument
is delivered. Pre-installed capillaries are not numbered in the diagram.
High-pressure gradi-
ent system
Figure 4 Installation diagram – Gradient
The following chapters describe the individual installation steps in detail.

3.2 Setting up the instrument ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
10 ￭￭￭￭￭￭￭￭ 942 Extension Module Vario HPG (2.942.0040)
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 Transport locking screws
To avoid damage to the high-pressure pump drive during transport, the
pump is secured with transport locking screws. These are located at the
rear of the instrument and labeled with Transport security screws.
Remove these transport locking screws before the initial start-up.
Accessories For this step you need:
￭4 mm hex key (6.2621.030)
Removing the transport locking screws
1Remove all of the transport locking screws with the hex key.
Store the transport locking screws in a safe place. Reinsert the transport
locking screws each time you transport the instrument a significant dis-
tance.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 3 Installation
942 Extension Module Vario HPG (2.942.0040) ￭￭￭￭￭￭￭￭ 11
CAUTION
The pumps may be damaged if you transport the instrument without
inserting the transport locking screws.
3.4 Base tray and bottle holder
3.4.1 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
3.4.2 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.
3.4.2.1 Removing/mounting the base tray
Remove the base tray to install another instrument under the IC instru-
ment.

3.4 Base tray and bottle holder ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
12 ￭￭￭￭￭￭￭￭ 942 Extension Module Vario HPG (2.942.0040)
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)
123
Figure 5 Removing the base tray
1Tilt the instrument sideways and lay it down flat.
2Loosen the 4 cylinder screws with the 3 mm hex key. Remove the cyl-
inder screws and their washers.