wtw photoLab 6100 VIS User manual

ba75847e01 08/2009
photoLab®6100 VIS
Functional description
Spectrophotometer
(identical to spectroFlex 6100)

photoLab®6100 VIS
ba75847e01 08/2009
Accuracy when going to
press
The use of advanced technology and the high quality standard of our
instruments are the result of continuous development. This may result
in differences between this operating manual and your instrument.
Also, we cannot guarantee that there are absolutely no errors in this
manual. Therefore, we are sure you will understand that we cannot
accept any legal claims resulting from the data, figures or descriptions.
Note
The latest version of the present operating manual is available on the
Internet under http://www.WTW.com.
Copyright ©Weilheim 2009, WTW GmbH
Reprinting - even as excerpts - is only allowed with the explicit written
authorization of WTW GmbH.
Printed in Germany.

photoLab®6100 VIS Contents
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photoLab®6100 VIS - Contents
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1 Overview of the instrument . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.3 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.1 Target group and user qualification . . . . . . . . . . . . . . . . 11
2.2 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.3 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . 12
2.4 Handling of hazardous substances . . . . . . . . . . . . . . . . 13
3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.1 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2.1 Inserting the buffer batteries . . . . . . . . . . . . . . . 16
3.2.2 Connecting the power supply . . . . . . . . . . . . . . 17
3.2.3 Switching on the photometer for the first time . . 18
3.2.4 Setting the language . . . . . . . . . . . . . . . . . . . . . 18
3.2.5 Setting the date and time . . . . . . . . . . . . . . . . . 19
3.3 Connecting optional accessories . . . . . . . . . . . . . . . . . . 20
3.3.1 Communication interfaces . . . . . . . . . . . . . . . . . 20
3.3.2 PC/printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.3.3 USB memory device . . . . . . . . . . . . . . . . . . . . . 22
3.3.4 PC keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.3.5 Barcode reader . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.3.6 Car Adapter photoLab®6xxx . . . . . . . . . . . . . . 23
4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.1 Switching on or off the photometer . . . . . . . . . . . . . . . . 25
4.2 General operating principles . . . . . . . . . . . . . . . . . . . . . 28
4.2.1 Navigating with function keys and menus . . . . . 28
4.2.2 Display of navigation paths in short form . . . . . 30
4.2.3 Entry of numerals, letters and characters . . . . . 31
4.2.4 Detailed operating example: Changing the
language . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.3 Photometer settings and system administration . . . . . . 34
4.3.1 Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.3.2 Date/Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4.3.3 Display settings . . . . . . . . . . . . . . . . . . . . . . . . . 36

Contents photoLab®6100 VIS
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4.4 Zero adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4.5 Measuring in Concentration mode . . . . . . . . . . . . . . . . . 41
4.5.1 Measuring cell tests with barcode . . . . . . . . . . . 41
4.5.2 Measuring reagent tests with AutoSelector . . . . 42
4.5.3 Measuring reagent-free tests and user-defined
methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4.5.4 Exceeding the upper or lower limits of the
measuring range . . . . . . . . . . . . . . . . . . . . . . . . 46
4.5.5 Selecting a method manually . . . . . . . . . . . . . . . 47
4.5.6 Settings for Concentration mode . . . . . . . . . . . . 48
4.5.7 Measuring diluted samples . . . . . . . . . . . . . . . . 50
4.5.8 Sample blank value . . . . . . . . . . . . . . . . . . . . . . 52
4.5.9 Reagent blank value . . . . . . . . . . . . . . . . . . . . . 54
4.5.10 Automatic Turbidity correction . . . . . . . . . . . . . . 58
4.5.11 Programming / modifying user-defined methods 58
4.5.12 The IQ LabLink procedure . . . . . . . . . . . . . . . . . 68
4.6 Measuring the Absorbance / % Transmission . . . . . . . . 69
4.6.1 General information . . . . . . . . . . . . . . . . . . . . . . 69
4.6.2 Measuring the absorbance or transmission . . . . 69
4.6.3 Measuring against the Reference absorbance . 71
4.7 Multi wavelengths methods . . . . . . . . . . . . . . . . . . . . . . 73
4.7.1 Basic information on Multi wavelengths
measurements . . . . . . . . . . . . . . . . . . . . . . . . . . 73
4.7.2 Programming / modifying Multi wavelengths
methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
4.7.3 Selecting a Multi wavelengths method . . . . . . . 77
4.7.4 Carrying out Multi wavelengths measurements . 78
4.8 Spectrum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
4.8.1 General information . . . . . . . . . . . . . . . . . . . . . . 80
4.8.2 Recording the Spectrum . . . . . . . . . . . . . . . . . . 81
4.8.3 Loading/editing a spectrum . . . . . . . . . . . . . . . . 84
4.8.4 Saving / exporting a spectrum . . . . . . . . . . . . . . 87
4.9 Kinetics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
4.9.1 Creating/editing profiles for kinetic records . . . . 88
4.9.2 Loading a profile for kinetic recording . . . . . . . . 91
4.9.3 Recording the Kinetics . . . . . . . . . . . . . . . . . . . . 92
4.9.4 Saving / exporting a kinetic record . . . . . . . . . . . 95
4.9.5 Loading a kinetic record . . . . . . . . . . . . . . . . . . . 96
4.9.6 Editing a kinetic record . . . . . . . . . . . . . . . . . . . 97
4.10 Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
4.10.1 User defined timer . . . . . . . . . . . . . . . . . . . . . . 100

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4.10.2 Analysis timer . . . . . . . . . . . . . . . . . . . . . . . . . 100
4.11 Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
4.11.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
4.11.2 Instructions on using USB memory devices 104
4.11.3 Measurement datasets . . . . . . . . . . . . . . . . . . 105
4.11.4 Saving measurement datasets manually . . . . 105
4.11.5 Saving measurement datasets automatically . 106
4.11.6 Displaying measurement data memory . . . . . . 107
4.11.7 Filtering measurement datasets . . . . . . . . . . . 109
4.11.8 Inverting filters . . . . . . . . . . . . . . . . . . . . . . . . . 110
4.11.9 Erasing stored measurement datasets . . . . . . 111
4.12 Copying files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
4.12.1 Copying individual files to a USB memory
device . . . . . . . . . . . . . . . . . . . . . . . . . . 112
4.12.2 Copying all measurement data files to a USB
memory device . . . . . . . . . . . . . . . . . . . . . . . . 114
4.12.3 Copying files to a PC . . . . . . . . . . . . . . . . . . . . 115
4.13 Transmitting data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
4.13.1 Printer and terminal programs . . . . . . . . . . . . . 116
4.13.2 Settings for data transmission . . . . . . . . . . . . . 116
4.13.3 Printing measurement datasets . . . . . . . . . . . 117
4.13.4 Printing Kinetics records . . . . . . . . . . . . . . . . . 118
4.13.5 Printing spectra . . . . . . . . . . . . . . . . . . . . . . . . 119
4.14 Analytical quality assurance (AQA) . . . . . . . . . . . . . . . 120
4.14.1 General information . . . . . . . . . . . . . . . . . . . . . 120
4.14.2 Photometer monitoring (AQA1) . . . . . . . . . . . . 121
4.14.3 Total system monitoring (AQA2) . . . . . . . . . . . 126
4.14.4 AQA3/MatrixCheck . . . . . . . . . . . . . . . . . . . . . 130
4.15 User management . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
4.15.1 User levels and user rights . . . . . . . . . . . . . . . 136
4.15.2 Activating or deactivating the User
management function . . . . . . . . . . . . . . . . . . . 137
4.15.3 Creating, changing or deleting a user account 138
4.15.4 Login with active user management . . . . . . . . 141
4.15.5 Changing the password . . . . . . . . . . . . . . . . . 143
4.16 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
4.17 Photometer information ([Info]) . . . . . . . . . . . . . . . . . . 145
4.18 Lamp counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
4.19 Software and methods update . . . . . . . . . . . . . . . . . . . 146
4.19.1 Update by means of a USB memory device . . 146
4.19.2 Update by means of a PC . . . . . . . . . . . . . . . . 148
4.19.3 Software update "Chinese character set" . . . . 149

Contents photoLab®6100 VIS
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5 Maintenance and cleaning . . . . . . . . . . . . . . . . . . . . . 151
5.1 Replacing the lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
5.2 Exchanging the buffer batteries . . . . . . . . . . . . . . . . . . 153
5.3 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
6 What to do if ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
6.1 Actions in the case of a broken cell . . . . . . . . . . . . . . . 155
6.2 Error causes and remedies . . . . . . . . . . . . . . . . . . . . . . 156
7 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
7.1 Measurement characteristics . . . . . . . . . . . . . . . . . . . . 159
7.2 Measured value documentation and quality assurance 162
7.3 General meter data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
8 Accessories and options . . . . . . . . . . . . . . . . . . . . . . . 165
8.1 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
8.2 Test equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
8.3 Optional equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
8.4 Connection cable: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
A.1 Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
A.1.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
A.1.2 General settings and functions . . . . . . . . . . . . 173
A.2 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
A.3 List of trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
3.1 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

photoLab®6100 VIS Overview
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1 Overview
1.1 Overview of the instrument
Front of the
instrument
Socket field on the
rear panel
Note
All connections comply with SELV.
1Display
2 Keypad
3 Shaft for rectangular cells
4 Turn-up lid
5 Shaft for round cells
6 Cell shaft cover
Fig. 1-1 Front of the instrument with operating elements
2
1
35
6
4
7 Connection for power pack
8 RS232 connection
9 USB-A connection
10 USB-B connection
Fig. 1-2 Rear panel with socket field
78910

Overview photoLab®6100 VIS
8ba75847e01 08/2009
1.2 Keypad
Overview
Key functions The keys on the right side of the keypad have the following functions:
1 Function keys F1 to F4 (function menu-depending)
2 Alphanumeric keypad
3 Keys with dedicated function
Fig. 1-3 Keypad
1
2 3
Key Designation Functions
<ON/OFF> – Switches on and off the
photometer.
<HOME> – Switches to the main menu from
any operating situation. Actions
that are not completed are
canceled.
<PRINT> – Downloads the displayed mea-
sured value to an interface if the
Printer symbol is displayed in the
status line.
<STORE> – Saves a displayed measured
value or spectrum if the Save
symbol is displayed in the status
line.
<ZERO·BLANK> – Starts one of the following
measurements, depending on the
operating situation:
- Zero adjustment
- Blank value measurement
- Baseline measurement.

photoLab®6100 VIS Overview
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Function keys The function keys F1 to F4 have different functions depending on the
operating situation. The current functions are displayed in the function key
menu at the bottom edge of the display (see section 4.2.1).
<TIMER> – Opens the menu, Timer.
<ESC> – Cancels the running action.
Entries that have not yet been
accepted are discarded.
– Switches to the next higher menu
level.
<START·ENTER> – Starts an action (e.g.
measurement)
– Opens a selected menu
– Confirms a selection or entry
(Arrow keys)
<▲>or
<▼>
– Moves the selection in menus and
lists one position up or down
<W>– Deletes the character left of the
cursor during character entries
– Moves the cursor to the left in a
spectrum or kinetic diagram
<X>– Moves the cursor to the right in a
spectrum or kinetic diagram
Key Designation Functions

Overview photoLab®6100 VIS
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1.3 Display
Display elements
Symbols in the
status line
1 Status line (current state, date and time)
2 Display range for menus and measurement results
3 Function keys menu
Bild 1-4 Display
1
2
3
Concentration 04/16/07 9:52
1.92 mg/l
18: 14752 NH4-N
10 mm 0.05 - 3.00 mg/l
Setup Method list Citation form Unit
Symbol Designation Function
Save The <STORE> key is active.
You can store the displayed data with
<STORE> (see section 4.11).
Printer The <PRINT> key is active.
You can output to an interface the displayed
data with <PRINT> (see section 4.13).
Progress bar During the warm-up time (15 minutes) a prog-
ress bar appears on the display.
The reproducibility of measured values is lim-
ited during the warm-up time (see section
4.13).

photoLab®6100 VIS Safety instructions
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2 Safety instructions
This operating manual contains basic instructions that you must follow during
the commissioning, operation and maintenance of the photometer.
Consequently, all responsible personnel must read this operating manual
carefully before working with the meter. Keep this operating manual in the
vicinity of the meter.
General safety
instructions
Safety instructions in this operating manual are indicated by the warning
symbol (triangle) in the left column. The signal word (such as "caution")
indicates the danger level:
Warning
indicates instructions that must be followed precisely in order to
prevent serious dangers to personnel.
Caution
indicates instructions that must be followed precisely in order to avoid
slight injuries to personnel or damage to the instrument or the
environment.
Other labels
Note
indicates notes that draw your attention to special features.
Note
indicates cross-references to other documents.
2.1 Target group and user qualification
The photometer was developed for use in the laboratory. Carrying out
photometric determinations with the aid of test sets frequently requires the
handling of hazardous substances.
We assume that the operating personnel know how to handle hazardous
substances due to their professional training and experience. The operating
personnel must particularly be able to understand and correctly implement
the safety labels and safety instructions on the packages and inserts of the
test sets.

Safety instructions photoLab®6100 VIS
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2.2 Authorized use
The authorized use of the photometer consists exclusively of the carrying out
of photometric measurements according to this operating manual. Follow the
technical specifications of the cells in chapter 7 TECHNICAL DATA. Any other
use is considered to be unauthorized.
2.3 General safety instructions
The photometer is built and inspected according to the relevant guidelines
and norms for electronic instruments (see chapter 7 TECHNICAL DATA). It left
the factory in a safe and secure technical condition.
Note
Opening the photometer or adjustment and repair work must only be
performed by specialist personnel authorized by the manufacturer.
Noncompliance invalidates any claim with regard to the warranty.
Function and
operational safety
The smooth functioning and operational safety of the photometer can only be
guaranteed if the generally applicable safety measures and the specific
safety instructions in this operating manual are followed during operation.
The smooth functioning and operational safety of the photometer can only be
guaranteed under the environmental conditions that are specified in chapter
7 TECHNICAL DATA.
If the photometer was transported from a cold environment to a warm
environment, the formation of condensate can lead to the faulty functioning
of the meter. In this event, wait until the temperature of the meter reaches
room temperature before putting the meter back into operation.
Safe operation If safe operation is no longer possible, the photometer must be taken out of
operation and secured against inadvertent operation.
Safe operation is no longer possible if the photometer:
zhas been damaged in transport
zhas been stored under adverse conditions for a lengthy period of time
zis visibly damaged
zno longer operates as described in this manual.
If you are in any doubt, contact the supplier of your photometer.

photoLab®6100 VIS Safety instructions
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2.4 Handling of hazardous substances
When developing test sets, WTW carefully sees that the tests can be carried
out as safely as possible. Some hazards by dangerous substances, however,
cannot always be avoided.
Warning
Improper handling of certain reagents can cause damage to your
health.
In any case follow the safety labels on the packing and the safety
instructions of the package insert. Protective measures specified there
have to be followed exactly.
Safety datasheets The safety datasheets of the chemicals comprise all instructions on safe
handling, occurring hazards, preventive actions and actions to take in
hazardous situations. Follow these instructions in order to work safely.

Safety instructions photoLab®6100 VIS
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photoLab®6100 VIS Commissioning
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3 Commissioning
3.1 Scope of delivery
zSpectrophotometer photoLab®6100 VIS
zPower pack connection cable
zBuffer batteries 4 x AA alkaline manganese (Mignon)
zZero cell (16 mm, round)
zShort instructions
zCD-ROM with
– Detailed operating manual
– Analysis instructions
– SpectralTransfer software
– Software update "Chinese character set" (see section 4.19.3)
Packing This photometer is sent out in a protective transport packing.
Caution
Keep the original packing including the inner packing to protect the
instrument against hard shocks if it has to be transported.
The original packing is also required for the proper return of the
instrument if it has to be repaired.
Note that damage caused by improper transport voids all warranty
claims.
3.2 Initial commissioning
Perform the following activities:
zInsert the buffer batteries (see section 3.2.1)
zConnect the power supply (see section 3.2.2)
zSwitch on the photometer (see section 3.2.3)
zSet the language (see section 3.2.4)
zSet the date and time (see section 3.2.5)
zCarry out a zero adjustment (see section 4.4)
Note
When you set the language, date and time according to the sections and of
this operating manual you will quickly become familiar with the simple
operation of the photoLab®6100 VIS. More detailed instructions on
operation are given in section 4.2 GENERAL OPERATING PRINCIPLES.

Commissioning photoLab®6100 VIS
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3.2.1 Inserting the buffer batteries
The buffer batteries supply the integrated clock while the photometer is
switched off. Four alkaline manganese batteries (type AA or Mignon)
separately included in the scope of delivery are used as the buffer batteries.
Insert the batteries as follows:
Battery service life The power consumption of the clock is very low. The lifetime of high quality
batteries is at least 5 years.
1Turn the photometer upside down
and place it on a soft surface.
2Open the lid of the battery
compartment (1).
3Insert the four batteries in the
battery compartment. Make sure
that the poles of the batteries are
in the correct position.
The ± signs on the batteries must
correspond to the ± signs in the
battery compartment.
4Close the lid of the battery
compartment.
1

photoLab®6100 VIS Commissioning
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3.2.2 Connecting the power supply
The power is supplied with the aid of the enclosed plug-in power pack. The
power pack supplies the photometer with low voltage (12 VDC).
Caution
The line voltage of the usage location must fulfill the specifications
stated on the power pack (the specifications are also given in chapter 7
TECHNICAL DATA). Always use the supplied 12 V original power pack
only.
Connecting the
plug-in power pack
Operation with a
mobile 12 V power
source
You can also operate the photoLab®6100 VIS on the move and independent
of the local power supply.
To do so, a 12 V power supply such as a commercial 12 V portable power
source or a 12 V car battery and the Car Adapter photoLab®6xxx available
as an accessory is required (see section 8.1).
More details on operation are given:
zin section 3.3.6 and
zwith the Car Adapter photoLab®6xxx.
1Connect the miniplug of the power
pack to the socket (1) of the
photometer.
2Connect the power pack to an
easily accessible power socket.
The display illumination switches
itself on and then off again.
1

Commissioning photoLab®6100 VIS
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3.2.3 Switching on the photometer for the first time
During the initial commissioning, the photometer automatically guides you
through the setting of the meter language, date and time after switching on
(see following sections).
When the initial commissioning is completed, the photometer displays the
Home menu each time after it is switched on and after the self-test (see
section 4.1).
3.2.4 Setting the language
During the initial commissioning the photometer automatically guides you to
the setting of the meter language after switching on.
After the initial commissioning, you can change the language in the
General setup / Language menu at any time (see section 4.2.4).
1Press <ON/OFF>.
The photometer is switched on.
The display switches to the setting
of the language (see section
3.2.4).
After the setting of the language
the photometer carries out the
self-test.
1Select a language with <▲><▼>.
2Confirm the selected language
with <START·ENTER>.
The language has been set.
The currently selected language is
marked by a tick.
The display switches to the setting
of the Date and Time (see section
3.2.5).
Language 16.04.07 9:52
Deutsch ✓
English
Français
Español
Italiano
Bulgarian/Български
Česko
Chinese/ 中文
Traditional Chinese/ 繁體中文
Greek/Ελληνικά
Indonesian/Indonesia
Language 16.04.07 9:52
Deutsch ✓
English
Français
Español
Italiano
Bulgarian/Български
Česko
Chinese/ 中文
Traditional Chinese/ 繁體中文
Greek/Ελληνικά
Indonesian/Indonesia

photoLab®6100 VIS Commissioning
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3.2.5 Setting the date and time
During the initial commissioning, the instrument automatically guides you to
the setting of the time and date after the setting of the language.
After the initial commissioning, you can change the date and time in the
General setup / Date/Time menu at any time (see section 4.2.4).
The Date/Time menu is open.
Using <▲><▼>, select a menu
item and
confirm or open it with
<START·ENTER>.
1Select and confirm Date.
The input field for the current date
pops up.
2Enter the current date with <0...9>
and confirm.
The input field closes.
The date is accepted.
3Select and confirm Time.
The input field for the current time
pops up.
4Enter the current time with <0...9>
and confirm.
The input field closes.
The time is accepted.
Date/Time 16.04.07 9:52
Date 16.04.2007
Time 9:52:09
OK
Date/Time 16.04.07 9:52
Date 16.04.2007
Time 9:52:09
OK
Date
23 .10.2006
Date/Time 16.04.07 9:52
Date 16.04.2007
Time 9:52:09
OK
Time
10 :22 :09

Commissioning photoLab®6100 VIS
20 ba75847e01 08/2009
3.3 Connecting optional accessories
3.3.1 Communication interfaces
Connections
You can connect the following accessories to the photometer:
zPC (see section 3.3.2)
zPrinter (see section 3.3.2)
zUSB storage media (see section 3.3.3)
zUSB-PC keyboard (see section 3.3.4)
zBarcode reader (see section 3.3.5)
zCar Adapter photoLab®6xxx (see section 3.3.6)
Note
If you want to connect several USB devices such as a USB-PC keyboard and
a USB memory device to the meter, you can increase the number of USB-A
sockets by a commercially available USB-2 hub with separate power supply.
Fig. 3-1 Communication interfaces on the rear panel
USB-A
RS232
USB-B