Metrohm 941 User manual

941 Eluent Production Module
Manual
8.941.8001EN / 2020-01-08

Metrohm AG
CH-9100 Herisau
Switzerland
Phone [phone]
Fax [phone]
[email protected]
www.metrohm.com
941 Eluent Production Module
Manual
8.941.8001EN / 2020-01-08

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
941 Eluent Production Module (2.941.0010) ￭￭￭￭￭￭￭￭ III
Table of contents
1 Introduction 1
1.1 Instrument description ......................................................... 1
1.1.1 Intended use ........................................................................... 1
1.2 About the documentation ................................................... 2
1.2.1 Symbols and conventions ........................................................ 2
1.3 Safety instructions ................................................................ 3
1.3.1 General notes on safety ........................................................... 3
1.3.2 Electrical safety ........................................................................ 3
1.3.3 Tubing and capillary connections ............................................. 4
1.3.4 Flammable solvents and chemicals ........................................... 4
1.3.5 Recycling and disposal ............................................................. 4
2 Overview of the instrument 6
2.1 Front ...................................................................................... 6
2.2 Rear ........................................................................................ 7
3 System overview 8
4 Installation 10
4.1 Setting up the instrument .................................................. 10
4.1.1 Packaging .............................................................................. 10
4.1.2 Checks .................................................................................. 10
4.1.3 Location ................................................................................ 10
4.2 Base tray and bottle holder ............................................... 10
4.2.1 Basic information on base tray and bottle holder ................... 10
4.2.2 Mounting base tray and bottle holder (optional) .................... 11
4.3 Connecting the eluent bottle ............................................. 16
4.4 Connecting the concentrate bottle ................................... 19
4.5 Connecting the ultrapure water container ....................... 22
4.5.1 Connecting the ultrapure water canister ................................ 22
4.5.2 Connecting an ELGA PURELAB flex ........................................ 25
4.6 Installing the Dosino .......................................................... 26
4.7 Connecting the instrument ................................................ 29
4.7.1 Connecting the instrument to the ion chromatograph ........... 29
4.7.2 Connecting the instrument to the power grid ........................ 29
5 Operation 31
6 Operation and maintenance 32
6.1 Care ...................................................................................... 32

Table of contents ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
IV ￭￭￭￭￭￭￭￭ 941 Eluent Production Module (2.941.0010)
6.2 Servicing the door .............................................................. 32
6.3 Dosino .................................................................................. 33
6.4 Dosing unit .......................................................................... 33
7 Troubleshooting 34
7.1 Dosino .................................................................................. 34
7.2 Dosing unit .......................................................................... 34
8 Technical specifications 35
8.1 Reference conditions .......................................................... 35
8.2 Ambient temperature ......................................................... 35
8.3 Level sensor ........................................................................ 35
8.4 Housing ............................................................................... 36
8.5 Weight ................................................................................. 36
8.6 Dosino .................................................................................. 36
8.7 Dosing unit .......................................................................... 36
8.8 Power connection ............................................................... 36
8.9 Interfaces ............................................................................. 37
9 Accessories 38
Index 39

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of figures
941 Eluent Production Module (2.941.0010) ￭￭￭￭￭￭￭￭ V
Table of figures
Figure 1 Front ................................................................................................. 6
Figure 2 Rear .................................................................................................. 7
Figure 3 Removing the base tray ................................................................... 12
Figure 4 Mounting the base tray ................................................................... 13
Figure 5 Removing the bottle holder ............................................................. 14
Figure 6 Mounting the bottle holder ............................................................. 15
Figure 7 Bottle cap for level sensor - Inserting the measuring sensor ............. 16
Figure 8 Installing the eluent bottle cap with level sensor .............................. 17
Figure 9 Installing the concentrate bottle cap without level sensor ................ 19
Figure 10 Installing the concentrate bottle cap with level sensor ..................... 20
Figure 11 Installing the ultrapure water canister cap without level sensor ........ 22
Figure 12 Installing the ultrapure water canister cap with level sensor ............. 23
Figure 13 Installing an ELGA PURELAB flex ...................................................... 25
Figure 14 Connecting the Dosino .................................................................... 27

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
941 Eluent Production Module (2.941.0010) ￭￭￭￭￭￭￭￭ 1
1 Introduction
1.1 Instrument description
The 941 Eluent Production Module allows you to produce eluent for
your IC system from a concentrate and ultrapure water as needed and in a
software-controlled manner.
Thanks to the built-in Level Control, the instrument is capable of monitor-
ing the liquid levels in up to 4 liquid containers, if they are equipped with
level sensors.
A level sensor for the eluent bottle is indispensable for the automated pro-
duction of eluent and is contained in the scope of delivery of the 941 Elu-
ent Production Module. However, we recommend using level sensors to
also monitor the bottle with the concentrate and the ultrapure water con-
tainer. Additional level sensors are available as optional accessories in vari-
ous versions.
The 941 Eluent Production Module is operated with the MagIC Net soft-
ware. If the 941 Eluent Production Module is connected to a 940 Profes-
sional IC Vario instrument, MagIC Net automatically detects the 941 Elu-
ent Production Module and checks its functional capability. It controls and
monitors the entire IC system including all connected instruments; it evalu-
ates the measured data and manages it in a database.
1.1.1 Intended use
The 941 Eluent Production Module is an instrument for the automated
production of eluent for ion chromatography systems. It can monitor the
levels of various liquid containers and, where necessary, perform appropri-
ate actions controlled by the software.
The present instrument is suitable for processing chemicals. Usage of the
941 Eluent Production Module therefore requires the user to have basic
knowledge and experience in handling toxic and caustic substances.
Knowledge regarding the application of fire prevention measures prescri-
bed for laboratories is also mandatory.

1.2 About the documentation ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
2￭￭￭￭￭￭￭￭ 941 Eluent Production Module (2.941.0010)
1.2 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.
1.2.1 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.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
941 Eluent Production Module (2.941.0010) ￭￭￭￭￭￭￭￭ 3
NOTE
This symbol highlights additional information and
tips.
1.3 Safety instructions
1.3.1 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.
1.3.2 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).

1.3 Safety instructions ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
4￭￭￭￭￭￭￭￭ 941 Eluent Production Module (2.941.0010)
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.
1.3.3 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.
1.3.4 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.
1.3.5 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 Introduction
941 Eluent Production Module (2.941.0010) ￭￭￭￭￭￭￭￭ 5
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￭￭￭￭￭￭￭￭ 941 Eluent Production Module (2.941.0010)
2 Overview of the instrument
2.1 Front
Figure 1 Front
1Dosino holder
Receptacle for a Dosino.
2LED
Standby indicator.
3Cable duct
Conduit to the rear of the instrument. For
feeding through tubing and the Dosino
cable.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 2 Overview of the instrument
941 Eluent Production Module (2.941.0010) ￭￭￭￭￭￭￭￭ 7
2.2 Rear
Figure 2 Rear
1USB sockets
2 sockets for plugging in USB cables for con-
necting devices with USB connector. Labeled
USB 1 and USB 2.
2Controller socket
Socket for plugging in the USB cable
(6.2151.000) for connecting the ion chro-
matograph.
3MSB sockets
3 sockets for plugging in MSB cables for
connecting devices with MSB connector.
Labeled MSB 2, MSB 3 and MSB 4.
4Power socket
For connecting the power cord.
5Level sensor sockets
4 sockets for connecting level sensor cables
(6.2151.060).
6Type plate
7Cable duct
Conduit to the front of the instrument. For
feeding through tubing and the Dosino
cable.

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8￭￭￭￭￭￭￭￭ 941 Eluent Production Module (2.941.0010)
3 System overview
The following figure shows an ion chromatography system with a Sample
Processor (left), the ion chromatograph (middle) and the 941 Eluent Pro-
duction Module (right).
The 941 Eluent Production Module consists of a housing with a built-in
Level Control. A Dosino with a 50 mL dosing unit, the canister for ultra-
pure water, the bottle for the eluent concentrate, the level sensor for the
eluent bottle and all small parts required for a standard setup are included
in the accessories supplied.
In a standard setup, only the eluent bottle is equipped with a level sensor.
The ultrapure water canister and the bottle with the concentrate are not
monitored.
If you intend to let your ion chromatography system run unsupervised for
extended periods of time, we recommend also monitoring the concen-
trate bottle and the ultrapure water canister with a level sensor.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 3 System overview
941 Eluent Production Module (2.941.0010) ￭￭￭￭￭￭￭￭ 9
Level sensors come with measuring sensors in different lengths:
￭Sensors with short measuring sensors warn when the liquid container
is full (FULL sensor).
￭Sensors with long measuring sensors warn when the liquid container is
empty (EMPTY sensor). Sensors with measuring sensors of different
lengths are available for 1 L bottles, 2 L bottles and for 10 L canisters.

4.1 Setting up the instrument ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
10 ￭￭￭￭￭￭￭￭ 941 Eluent Production Module (2.941.0010)
4 Installation
4.1 Setting up the instrument
4.1.1 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.
4.1.2 Checks
Immediately after receipt, check whether the shipment has arrived com-
plete and without damage by comparing it with the delivery note.
4.1.3 Location
The 941 Eluent Production Module can be placed directly onto the 940
Professional IC Vario. To accomplish this, the bottle holder of the ion chro-
matograph has to be removed and placed onto the 941 Eluent Production
Module (see chapter 4.2.2.2, page 13).
The 941 Eluent Production Module can also be placed directly under the
940 Professional IC Vario. To accomplish this, the base tray of the ion
chromatograph has to be removed and installed again under the 941 Elu-
ent Production Module (see chapter 4.2.2.1, page 11).
As an alternative, the 941 Eluent Production Module can be set up
together with other instruments with the same footprint in a separate
stack next to the ion chromatograph. We recommend that a bottle holder
(6.2061.100) and a base tray (6.2061.110) be mounted for each stack of
instruments.
4.2 Base tray and bottle holder
4.2.1 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.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 4 Installation
941 Eluent Production Module (2.941.0010) ￭￭￭￭￭￭￭￭ 11
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
4.2.2 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.
4.2.2.1 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)

4.2 Base tray and bottle holder ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
12 ￭￭￭￭￭￭￭￭ 941 Eluent Production Module (2.941.0010)
123
Figure 3 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.
3Remove the base tray.
Always mount the base tray under the lowermost instrument of the stack.
Mounting 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.
￭There are no loose parts in the instrument.
￭The instrument is lying on its side, and the bottom surface is visible.
Accessories
￭3 mm hex key (6.2621.100)