Metrohm 944 User Manual
944 Professional UV/VIS Detector Vario
2.944.0010
Manual
8.944.8001EN
Metrohm AG
CH-9100 Herisau
Switzerland
Phone +41 71 353 85 85
Fax +41 71 353 89 01
info@metrohm.com
www.metrohm.com
944 Professional UV/VIS Detector
Vario
2.944.0010
8.944.8001EN
Manual
11.2013 zst
Teachware
Metrohm AG
CH-9100 Herisau
teachware@metrohm.com
This documentation is protected by copyright. All rights reserved.
Although all the information given in this documentation has been
checked with great care, errors cannot be entirely excluded. Should you
notice any mistakes please send us your comments using the address
given above.
Documentation in additional languages can be found on
http://documents.metrohm.com.
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Table of contents
1 Introduction 1
1.1 Instrument description ......................................................... 1
1.2 Intended use ......................................................................... 1
1.3 About the documentation ................................................... 1
1.3.1 Symbols and conventions ........................................................ 2
1.4 Safety instructions ................................................................ 3
1.4.1 General notes on safety ........................................................... 3
1.4.2 Electrical safety ........................................................................ 3
1.4.3 Tubing and capillary connections ............................................. 4
1.4.4 Flammable solvents and chemicals ........................................... 4
1.4.5 Recycling and disposal ............................................................. 4
2 Overview of the instrument 6
2.1 Front ...................................................................................... 6
Table of contents
2.2 Rear ........................................................................................ 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 Setup configurations ............................................................ 8
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) .................... 10
3.4 Installing the flow-through cell ......................................... 15
3.5 Connecting the flow-through cell ..................................... 17
3.6 Connecting the instrument ................................................ 19
3.6.1 Connecting the instrument to a computer ............................. 19
3.6.2 Connecting the instrument to the power supply .................... 19
4 Start-up 21
5 Operation 23
6 Operation and maintenance 24
6.1 Care ...................................................................................... 24
6.2 Maintenance by Metrohm Service .................................... 24
6.3 Door ..................................................................................... 25
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Table of contents
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6.4 Replacing the UV lamp ....................................................... 25
6.5 Replacing the VIS lamp ...................................................... 28
6.6 Adjusting the lamp settings .............................................. 28
6.7 Cleaning the flow-through cell .......................................... 29
6.8 Quality Management and qualification with
Metrohm ............................................................................. 33
7 Troubleshooting 34
7.1 Problems and their solutions ............................................. 34
8 Technical specifications 35
8.1 Reference conditions .......................................................... 35
8.2 UV/VIS detector .................................................................. 35
8.3 Lamps .................................................................................. 37
8.4 Ambient conditions ............................................................ 37
8.5 Housing ............................................................................... 37
8.6 Power connection ............................................................... 38
8.7 Interfaces ............................................................................. 38
8.8 Safety specifications ........................................................... 38
8.9 Electromagnetic compatibility (EMC) ................................ 39
8.10 Weight ................................................................................. 39
9 Warranty (guarantee) 40
10 Accessories 42
Index 44
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IV
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Table of figures
Figure 1 Front ................................................................................................. 6
Figure 2 Rear .................................................................................................. 7
Figure 3 Setup configurations ......................................................................... 9
Figure 4 Cell block ........................................................................................ 15
Figure 5 Connecting the detector input ......................................................... 17
Figure 6 Connecting the detector outlet ........................................................ 18
Figure 7 Intensity spectrum OK ..................................................................... 22
Figure 8 Lamp intensity too high ................................................................... 22
Figure 9 Operating hours counter ................................................................. 25
Figure 10 Lamp module .................................................................................. 25
Figure 11 Lamp module – without UV lamp .................................................... 27
Figure 12 Flow-through cell – parts ................................................................. 31
Table of figures
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1 Introduction
1.1 Instrument description
The 944 Professional UV/VIS Detector Vario is an independent instrument for the photometric determination of light-absorbing substances in
the UV/VIS range. It serves as UV/VIS detector within an ion chromatography system.
The 944 Professional UV/VIS Detector Vario is operated with the
MagIC Net software. It is connected to a PC on which MagIC Net is
installed with a USB cable. The software detects the instrument automatically and checks its functionality. MagIC Net controls and monitors the
instrument, evaluates the measured data and manages it in a database.
Additional information on operating MagIC Net can be found in the document "MagIC Net Tutorial" or in the software's online help.
1 Introduction
1.2 Intended use
The 944 Professional UV/VIS Detector Vario is used as an independent
detector with various analysis instruments of the Metrohm line of instruments.
The present instrument is suitable for processing chemicals and flammable
samples. Usage of the 944 Professional UV/VIS Detector Vario therefore
requires the user to have basic knowledge and experience in handling
toxic and caustic substances. Knowledge with respect to the application
of the fire prevention measures prescribed for laboratories is also mandatory.
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 operation of the instrument.
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1.3 About the documentation
1.3.1 Symbols and conventions
The following symbols and formatting may appear in this documentation:
Method Dialog text, parameter in the software
File ▶ New Menu or menu item
[Next] Button or key
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Cross-reference to figure legend
The first number refers to the figure number, the second 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-threatening 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.
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1.4 Safety instructions
1.4.1 General notes on safety
WARNING
This instrument may only be operated in accordance with the specifications 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.
1.4.2 Electrical safety
The electrical safety when working with the instrument is ensured as part
of the international standard IEC 61010.
WARNING
1 Introduction
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.
Mains voltage
WARNING
An incorrect mains voltage can damage the instrument.
Only operate this instrument with a mains voltage specified for it (see
rear panel of the instrument).
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1.4 Safety instructions
Protection against electrostatic charges
WARNING
Electronic components are sensitive to electrostatic charges and can be
destroyed by discharges.
Do not fail to pull the mains cable out of the mains connection 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
connections. Damaged tubing ends lead to leakage. Appropriate tools
can be used to loosen connections.
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Check the connections regularly for leakage. If the instrument is used
mainly in unattended operation, then weekly inspections are mandatory.
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 2002/96/EC, WEEE – Waste
from Electrical and Electronic Equipment.
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The correct disposal of your old equipment will help to prevent negative
effects on the environment and public health.
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1 Introduction
More details about the disposal of your old equipment can be obtained
from your local authorities, from waste disposal companies or from your
local dealer.
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2.1 Front
1
2
2 Overview of the instrument
2.1 Front
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Figure 1 Front
Flow-through cell
1
Standby indicator
2
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2.2 Rear
2 Overview of the instrument
Figure 2 Rear
Power switch
1
For switching the instrument on and off.
I = On
O = Off
Analog connection socket
3
Output for analog signals.
VIS lamp connection cable
5
Lamp cooling element
7
Service connection socket
9
Connector for service.
USB 1 connection socket
11
For connecting additional USB devices.
VIS connection socket
13
For connecting the cable of the VIS lamp.
Control connection socket
2
Not Used.
UV connection socket
4
For connecting the cable of the UV lamp.
UV lamp connection cable
6
Power socket
8
For connecting the power supply cable.
USB 2 connection socket
10
For connecting additional USB devices.
PC connection socket
12
For connecting the USB cable to the PC.
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3.1 Setting up the instrument
3 Installation
3.1 Setting up the instrument
3.1.1 Packaging
The instrument is supplied in highly protective special packaging together
with the separately 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 complete 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.
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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 fluctuations and direct sunlight.
The distance between the rear of the instrument and the wall must be
large enough to ensure air circulation on the cooling plate.
3.2 Setup configurations
The 944 Professional UV/VIS Detector Vario can be used as a detector
with the instruments of the 940 Professional IC Vario and 930 Compact IC
Flex family. For many applications with photometric detection, a post-column derivatization with the 943 Professional Thermostat / Reactor Vario
(2.943.0110) is required. To build such a system, you will need a 944 Professional UV/VIS Detector Vario and the following instruments:
￭ any 940 Professional IC Vario, or
any 930 Compact IC Flex
￭ a 943 Professional Thermostat / Reactor Vario
￭ optionally: a 942 Extension Module Vario for sample preparation
￭ optionally, if the reagent is pumped with a high-pressure pump: a Met-
rosep BP 1 Guard/2.0 backpressure column (6.1015.100)
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An IC system with photometric detection and post-column derivatization
can be set up in in various configurations.
944 Professional UV/VIS Detector Vario (2.944.0010)
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