Metrohm 909UV User Manual
909 UV Digester
Manual
8.909.8001EN
Metrohm AG
CH-9100 Herisau
Switzerland
Phone +41 71 353 85 85
Fax +41 71 353 89 01
info@metrohm.com
www.metrohm.com
909 UV Digester
8.909.8001EN
Manual
01.2013 ebe
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
1.1.1 Supply voltage ......................................................................... 1
1.1.2 Intended use ........................................................................... 1
1.2 Function description ............................................................. 2
1.3 About the documentation ................................................... 3
1.3.1 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 Personnel safety ...................................................................... 5
1.4.4 Flammable solvents and chemicals ........................................... 6
1.4.5 Recycling and disposal ............................................................. 6
Table of contents
2 Overview of the instrument 7
3 Installation 9
3.1 Setting up the instrument .................................................... 9
3.1.1 Packaging ................................................................................ 9
3.1.2 Checks .................................................................................... 9
3.1.3 Location .................................................................................. 9
3.2 Inserting the UV lamp .......................................................... 9
3.3 Mounting the UV protective shield ................................... 11
3.4 Preparing and connecting the temperature sensor ........ 14
3.5 Inserting the sample holder ............................................... 17
3.6 Connecting the power supply cable ................................. 18
4 Operation 20
4.1 Switching the instrument on and off ............................... 20
4.2 Dialog window overview ................................................... 20
4.2.1 Main dialog ........................................................................... 20
4.2.2 "Parameters" dialog ............................................................... 20
4.2.3 "Lamp info" dialog ................................................................ 21
4.2.4 "Lamp setup" dialog .............................................................. 21
909 UV Digester
4.3 The keypad .......................................................................... 23
4.3.1 The key functions .................................................................. 23
4.4 The display .......................................................................... 24
4.4.1 Display elements .................................................................... 24
4.4.2 Status display ........................................................................ 25
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III
Table of contents
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4.5 Changing numerical values ................................................ 25
5 Carrying out sample digestion 26
6 Application examples 31
7 Operation and maintenance 33
7.1 General ................................................................................ 33
7.2 Care ...................................................................................... 34
7.2.1 Maintaining and replacing the UV lamp ................................. 34
7.2.2 Clearing a jammed fan ........................................................... 35
7.2.3 Cleaning sample glasses ........................................................ 36
7.3 Quality Management and qualification with
Metrohm ............................................................................. 36
8 Troubleshooting 37
8.1 Error messages ................................................................... 37
8.2 Additional faults and their remedy ................................... 38
9 Technical specifications 39
9.1 Radiating ............................................................................. 39
9.2 Mercury vapor lamp ........................................................... 39
9.3 Temperature measuring input ........................................... 39
9.4 Power connection ............................................................... 40
9.4.1 220 - 240 V power connection .............................................. 40
9.4.2 100 - 127 V power connection with a transformer ................ 40
9.5 Safety specifications ........................................................... 40
9.6 Electromagnetic compatibility (EMC) ................................ 41
9.7 Ambient temperature ......................................................... 41
9.8 Reference conditions .......................................................... 42
9.9 Dimensions .......................................................................... 42
10 Warranty (guarantee) 43
11 Accessories 45
11.1 Scope of delivery ................................................................ 45
11.2 Optional accessories ........................................................... 49
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IV
Index 50
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Table of figures
Figure 1 UV lamp spectrum ............................................................................. 2
Figure 2 Front 909 UV Digester ....................................................................... 7
Figure 3 Rear 909 UV Digester ........................................................................ 8
Figure 4 Guiding the UV lamp downward into the wet end ........................... 10
Figure 5 Installing the UV lamp in the wet end .............................................. 11
Figure 6 Removing the stop .......................................................................... 11
Figure 7 Positioning the UV protective shield over the wet end ..................... 12
Figure 8 Positioning the stop over the threaded hole ..................................... 13
Figure 9 Screwing the stop in place ............................................................... 13
Figure 10 Removing the temperature sensor from the storage vessel .............. 14
Figure 11 Removing the spacer from the temperature sensor .......................... 14
Figure 12 Removing the SGJ sleeve from the temperature sensor .................... 14
Figure 13 Attaching the thermometer plug on the temperature sensor ........... 15
Figure 14 Attaching the spacer to the temperature sensor .............................. 15
Figure 15 Inserting the storage vessel for the temperature sensor into the
holder ............................................................................................. 16
Figure 16 Connecting a temperature sensor .................................................... 16
Figure 17 Guiding the sample holder into the wet end .................................... 17
Figure 18 Positioning the cylindrical guide for the sample holder ..................... 18
Figure 19 Inserting the temperature sensor at sample position 6 ..................... 18
Figure 20 Keypad for the operating unit .......................................................... 23
Figure 21 Main dialog - Display elements ........................................................ 24
Table of figures
909 UV Digester
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V
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1 Introduction
1.1 Instrument description
The 909 UV Digester is used for the digestion of aqueous samples moderately loaded with organic material. Its primary use is sample preparation
for analyses in voltammetry, ion chromatography, AAS and ICP-AES. The
digestion of samples is based on the photolytic generation of hydroxyl
radicals, whose formation is initiated by a hydrogen peroxide radical initiator. The hydroxyl radicals immediately react with the organic compounds
and work to break them down. The temperature and time for digestion
can be entered conveniently using the operating unit. The temperature is
controlled automatically using air cooling and the UV lamp's emitter
power (medium pressure mercury lamp), which is regulated between
100% and 50% as needed.
The 909 UV Digester combines the wet end and control unit in one housing. The UV lamp is located in the center of the wet end. The sample vessels are inserted in the sample holder encircling the UV lamp. The fan for
air cooling is located in the lower portion of the wet end. The control unit
consists of the operating unit and all of the electronics including the electronic ballast for regulating the UV lamp. The 909 UV Digester is used as a
standalone instrument.
1 Introduction
1.1.1 Supply voltage
The 909 UV Digester can be operated only with a supply voltage of 220 to
240 V. Therefore, for a supply voltage of 100 to 120 V, a transformer has
to be connected between the power and the instrument. You can find
details on the transformer's specifications in Chapter Technical specifica-
tions, page 39.
1.1.2 Intended use
The 909 UV Digester is a sample preparation instrument that can be used
in analytical laboratories for preparing samples for the following analysis
processes:
￭ Voltammetry
￭ Ion chromatography
￭ AAS
￭ ICP-AES
Chemicals and flammable substances can be used as a sample additive or
auxiliary reagent in this instrument. Usage of the 909 UV Digester therefore requires the user to have basic knowledge and experience in handling
toxic and caustic substances. Knowledge with respect to the application
909 UV Digester
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1.2 Function description
100
90
80
70
60
50
40
30
20
10
0
200 300 400 500
600
700
Intensity [%]
Wavelength [nm]
1 2
of the fire prevention measures prescribed for laboratories is also mandatory.
1.2 Function description
Through the effects of UV radiation, dissolved organic matter that disrupts
the trace analysis of heavy metals is decomposed. However, the UV radiation itself does not cause the digestion of the organic sample components; rather, hydroxyl radicals that form break down the organic matter.
Hydroxyl radicals are initially formed from the added hydrogen peroxide
that functions as the initiator for the radical chain reaction. Subsequently,
additional hydroxyl radicals are generated from the water if the temperature is high enough. Depending on the sample matrix, it may be necessary
to add more H2O2 during digestion.
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Spectrum of the UV lamp
The following figure shows a typical spectrum for the UV lamp. Certain
deviations from this spectrum are possible; this can be traced back to production-related factors.
Figure 1
UV lamp spectrum
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909 UV Digester
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UV
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.
1.3.1 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 second to the instrument part in the figure.
1 Introduction
Instruction step
Carry out these steps in the sequence shown.
Method Dialog text, parameter in the software
File ▶ New Menu or menu item
[Continue] Button or key
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 hazardous UV radiation.
Warning
This symbol draws attention to a possible biological
hazard.
909 UV Digester
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1.4 Safety instructions
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.
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Caution
This symbol draws attention to possible damage to
instruments or instrument parts.
Note
This symbol marks additional information and tips.
1.4.2 Electrical safety
The electrical safety when working with the instrument is ensured as part
of the international standard IEC 61010.
Only personnel qualified by Metrohm are authorized to carry out service
work on electronic components.
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.
Warning
Warning
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909 UV Digester
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UV
Warning
1 Introduction
Supply voltage
Warning
An incorrect supply voltage can damage the instrument.
Operate this instrument only with a supply voltage specified for it (refer
to the rear of the instrument). Use a transformer if necessary (for specifications for the transformer see Chapter 9.4.2, page 40).
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 Personnel safety
Hazardous chemical substances
Chemical substances can cause chemical burns and skin damage.
Correctly install the UV protective shield and wear protective glasses,
protective gloves and work clothes appropriate for laboratory work
when operating the 909 UV Digester.
Harmful UV radiation
UV radiation damages the eyes.
Protect your eyes from UV light during operation. Correctly install the
UV protective shield and wear UV protective glasses.
The 909 UV Digester has to be operated in a closed fume cupboard or
in a closed laboratory and may be operated only by trained personnel.
Warning
909 UV Digester
Attach the supplied UV warning shield included in the accessories to
the fume cupboard.
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1.4 Safety instructions
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Warning
Escaping ozone
Ozone can damage mucous membranes.
The 909 UV Digester has to be operated in a closed fume cupboard or
in a closed laboratory and may be operated only by trained personnel.
Warning
Hot surfaces
The UV lamp, sample vessels and sample holder become very hot during operation. The UV lamp can reach a temperature of 900 °C.
Skin contact during and immediately after a radiating procedure will
cause burns.
Avoid skin contact until the instrument is completely cool or wear heatinsulated gloves if necessary.
1.4.4 Flammable solvents and chemicals
Warning
All relevant safety measures are to be observed when working with
flammable solvents and chemicals.
￭ Set the instrument up in a closed fume cupboard.
￭ 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.
The correct disposal of your old equipment will help to prevent negative
effects on the environment and public health.
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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909 UV Digester
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1
2
3
4
5
6
7
8
9
2 Overview of the instrument
2 Overview of the instrument
Figure 2 Front 909 UV Digester
Wet end
1
Stops
3
For positioning the UV protective shield.
Holder
5
For inserting the sample holder.
"On" LED
7
Lights up if the instrument is switched on.
Control unit
9
Warning symbols
2
"UV radiation" and "Hot surfaces".
Lamp holder
4
With upper lamp socket.
Stop
6
With hex socket head screw, for mounting
the UV protective shield.
Operating unit
8
With keyboard and display.
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1
2
3
4
5
Figure 3 Rear 909 UV Digester
Holder
1
For storage vessel for temperature sensor.
Power switch
3
For switching the instrument on and off.
Type plate
5
Contains the serial number.
Temperature sensor connection
2
(Temp.)
For connecting the Pt1000 temperature sensor. Two B sockets, 2 mm.
Power socket
4
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909 UV Digester
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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.
3 Installation
In the wet end of the 909 UV Digester, ozone from the air is released due
to the UV radiation. Set up the instrument in a fume cupboard or closed
laboratory at a location in the laboratory that is suitable for operation and
free of vibrations. The location should be protected from corrosive atmospheres and contamination from chemicals.
The instrument should be protected against excessive temperature fluctuations and direct sunlight.
3.2 Inserting the UV lamp
The UV lamp (6.2804.090) is included in the scope of delivery for the 909
UV Digester.
Caution
Spots on the quartz tube
Spots will be burned into the quartz glass if you touch the UV lamp's
quartz tube with bare hands and put it into operation without cleaning
it first. This lowers the power of the UV lamp.
909 UV Digester
Always use the cotton glove included with the UV lamp to install the
lamp and only touch the UV lamp at the two flattened ends. Remove
any grease spots or dust particles stuck to the quartz tube before starting the UV lamp.
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3.2 Inserting the UV lamp
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Proceed as follows to insert the UV lamp:
Ensure that the power for the 909 UV Digester has been disconnec-
1
ted.
Remove the sample holder from the wet end if it has already been
2
inserted.
Put on the cotton glove included with the UV lamp.
3
Wipe off any spots on the quartz tube using a clean towel wetted
4
with pure alcohol.
Hold the UV lamp by one of the two flattened ends and guide it
5
downward into the wet end.
Figure 4 Guiding the UV lamp downward into the wet end
Insert the metal contact projecting on the lower end of the UV lamp
6
into the lower lamp socket and press it down gently.
While holding the UV lamp down, click the metal contact projecting
7
upwards into the upper lamp socket.
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909 UV Digester
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