HACH Lico 690 Professional Spectral Colorimeter User Manual

HACH Lico 690 Professional Spectral Colorimeter

Specifications

These are subject to change without notice!

Display mode

| Color measurement, color difference measurement, absorbance and concentration|

Color measurement

Color measurement| 26 color scales| 5 color scales

Colorimetric evaluation

| All visual color scales are calculated for standard light source C and 2° standard observer in accordance with ISO 11664. Colorimetric color values can be switched to light type A, C, D65 and 2° or 10° standard observers.
Source lamp| Halogen lamp
Wavelength range| 320–1100 nm
Wavelength Accuracy| ± 1,5 nm )wavelength range 340–900 nm(
Wavelength reproducibility| ≤ 0,1 nm
Wavelength resolution| 1 nm
Wavelength calibration| Automatic
Wavelength range for color measurement| 380–720 nm steps of 10 nm
Scanning speed| ≥ 8 nm/sec )in steps of 1 nm(
Spectral bandwidth| 5 nm
Photometric measuring range| ± 3 Abs )wavelength range 340–900 nm(
Photometric accuracy| 5 mAbs at 0,0–0,5 Abs,

1 % at 0,50–2,0 Ext

≤ 1 % at > 2 Abs with neutral glass at 546 nm

Stray light| < 0,1 % T at 340 nm with NaNO2

Data log

| 3000 color measurements, 100 color reference values,

1000 photometric measurements,

20 wavelength scans, 20 time scans

|

400 color measurements

Physical and environmental specifications
Width| 350 mm )13,78 in(
Height| 151 mm )5,94 in(
Depth| 255 mm )10,04 in(
Earth| 4200 g )9,26 lb(
Ambient operating requirements| 10–40 °C )50–104 °F(, maximum 80 % relative humidity )without condensate formation(
Ambient storage requirements| –40–60 °C )–40–140 °F(, maximum 80 % relative humidity )without condensate formation(
Additional technical data
Power connector via external power supply| Input: 100–240 V ± 10 VAC/47–63 Hz

Output: 15 V/40 VA

Interfaces

| 2× USB type A 1× USB type B

1× Ethernet

Housing rating| IP20
Protection class| Class I
Performance specifications| LICO 690| LICO 620
---|---|---
Altitude| 2000 m
Pollution degree| 2
Overvoltage category| II
Environmental conditions| Indoor use only
Power supply| External power supply

Safety information

Read through the entire user manual carefully before you unpack the device, set up and put into operation. Pay attention to all danger and caution statements. Failure to do so could result in serious injury to the operator or damage to the equipment.
To make sure that the protection provided by this instrument is not impaired, do not use or install this instrument in any manner other than that specified in these operating instructions.

NOTICE Indicates a situation that, if it is not avoided, can lead to damage to the device. Information that requires special emphasis.

Note: Information that supplements points in the main text.

Precautionary labels
Read all labels and tags attached to the instrument. Personal injury or damage to the instrument could occur if not observed. For symbols attached to the device, corresponding warning notes are found in the user manual.

| This symbol may be attached to the device and references the operation- and/or safety notes in the user manual.
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|

This symbol on the device is an indication of hot surfaces.

| Electrical equipment marked with this symbol may not be disposed of in European domestic or public disposal systems after 12 August 2005. In conformity with European local and national regulations )EU Directive 2002/96/EC(, European electrical equipment users must now return old or end-of life equipment to the manufacturer for disposal at no charge to the user.

Note: For return for recycling, please contact the equipment manufacturer or supplier for instructions on how to return end-of-life equipment, manufacturer-supplied electrical accessories, and all auxiliary items for proper disposal.

WARNING The manufacturer is not responsible for any damages due to misapplication or misuse of this product including, without limitation, direct, incidental and consequential damages, and totally excludes such damages as permitted under applicable laws.
The user is solely responsible to identify critical application risks and install appropriate mechanisms to protect processes during a possible equipment malfunction.

Safety around source lamps
The source lamp is operated at high temperatures.
To prevent electric shock, disconnect the instrument from the power source before replacing the lamp.

Chemical and biological safety

DANGER Potential danger with contact with chemical/biological substances.
Working with chemical samples, standards and reagents can be dangerous. Make yourself familiar with the necessary safety procedures and the correct handling of the chemicals before use and read and follow all relevant safety data sheets.

Normal operation of this device may require the use of chemicals or samples that are biologically unsafe.

• Observe all cautionary information printed on the original solution containers and safety data sheets prior to their use.
• Dispose of all consumed solutions in accordance with the local and national regulations and laws.
• Select the type of protective equipment suitable to the concentration and quantity of the dangerous material being used.

Overview of product

The LICO 690 and LICO 620 instruments are VIS spectral-photometers with wavelength ranges from 320 to 1100 nm. The instruments can perform a precise colorimetric analysis in accordance with ISO/ASTM standards with a single measurement and display the result in the form of classic color systems such as iodine, Hazen or Gardner color values. The instruments support multiple languages.

The LICO 690 is supplied with 26 color value calculations, while the LICO 620 is supplied with five color value calculations )Iodine color, Hazen color, Gardner color, Saybolt color and ASTM D 1500 color numbers(.
The LICO 690 contains the following programs and operating modes in addition to the color measurement: single wavelength mode, multi-wavelength mode, wavelength scan and time scan mode. The digital measurements are displayed in the dimensional units of concentration, absorbance or % transmittance, making the LICO 690 universally suitable for lab analysis.

Installation

WARNING Electrical and fire hazards.
Only use the supplied benchtop power supply LZV844.
Only qualified experts may perform the tasks described in this section of the manual, while adhering to all locally valid safety regulations.

Unpacking the instrument
The following components are supplied as standard with the LICO 690/ 620:

• LICO 690/LICO 620 spectrophotometer
• Dust cover
• USB dust cover, fitted as standard
• Table power supply with power cord
• Cuvette adapter Z, installed as standard
• Basic user manual

Note: If any of these items are missing or damaged, please contact the manufacturer or a sales representative immediately.

Operating environment
Observe the following points to allow the instrument to function normally and give a long operating life.

• Position the instrument securely on a flat surface taking care to remove any objects from under the device.
• The ambient temperature must be 10–40 °C )50–104 °F(.

NOTICE Protect the instrument from extreme temperatures from heaters, direct sunlight and other heat sources.

• The relative humidity should be less than 80 %; moisture should not condense on the instrument.
• Leave at least a 15 cm clearance at the top and on all sides for air circulation to avoid overheating of electrical parts.
• Do not use or store the device in extremely dusty, humid or wet places.
• Keep the surface of the instrument, the cell compartment and all accessories clean and dry at all times. Immediately remove splashes or spilt materials on or in the instrument.

Front and back view

Figure 1 Front and back view

Power connections

1. Connect the power cable to the benchtop power supply.
2. Plug the benchtop power supply cable into the back of the instrument )Figure 1(.
3. Insert the power cable plug into a mains socket )100–240 V~/47– 63 Hz(.
4. Turn on the power switch next to the screen to activate the power supply )Figure 1(.
   Note: If you do not intend to use the instrument for a long period, disconnect it from the power supply.
   Note: Make sure the socket you are using is easily accessible.

Interfaces

Network and access point security is the responsibility of the customer that uses the wireless instrument. The manufacturer will not be liable for any damages, inclusive however not limited to indirect, special, consequential or incidental damages, that have been caused by a gap in, or breach of network security.

The instrument has three USB ports and one Ethernet port as standard. They are located on the front and rear of the instrument )Figure 1(.
The USB type A ports are used for communications with a printer, USB memory stick or keyboard. A USB memory stick can be used to update the instrument software.
The USB type B port is used for communications with a PC.
A USB hub may be used to connect several accessories at a time.

Note : USB cables must not be longer than 3 m.
These USB ports permit data to be exported to a printer or PC and also allow the instrument software to be upgraded. The Ethernet port supports real-time data transfer in local networks, LIMS systems or SC controllers. Only use a shielded cable with a maximum length of 20 m for the Ethernet port.

Table 1 Interfaces

memory stick or a keyboard.
USB )Type B(| This USB port is intended only for the connection between the instrument and a PC )when the relevant software is installed(.

Ethernet

| The Ethernet port is intended for data transfer to a PC without installed software or in a local network. Only use a shielded cable with a maximum length of 20 m for the Ethernet port.

Cuvette compartments and cuvette adapters

Cuvette compartments and adapter
Open the cuvette compartments by sliding the cuvette compartment cover to the left.
The cover lowers to the side next to the cuvette compartments.
Note: If there are long intervals between uses, close the cuvette compartment cover to protect the optics of the instrument from dust and impurities.
The instrument has two cuvette compartments )Figure 2(. Only one cell type at a time can be used for a reading.

Cell compartment )1( for:
11 mm round cuvettes
Note: Insert cuvette adapter Z into the cuvette compartment (2).

Cell compartment )2( for:
The following cell types can be used in cell compartment )2(.

• Without cuvette adapter Z in the cuvette compartment )2(, you can insert 50 mm cuvettes.
• With cuvette adapter Z: 10 mm square cuvettes.
  Note: These cuvettes must be inserted with cuvette adapter Z.

1 **** Cuvette compartment )1( for round cuvettes

2 **** Cuvette compartment )2( for square cuvettes, cuvette adapter Z installed

Installation of cuvette adapter Z

1. Open the cuvette compartment.
2. Insert cuvette adapter Z into the cuvette compartment )2( so that the arrow on the cuvette adapter is pointing toward the cuvette compartment )1( )Figure 2(.

Note: The arrow on the cuvette adapter indicates the direction of the light beam path.

Start Up

All screen displays in this operating manual correspond to the LICO 690. The screen displays of the LICO 620 may differ.
Switch on the instrument, startup process

1. Connect the power cable to the mains outlet.
2. Switch on the instrument by pressing the power switch next to the screen.
3. The instrument starts automatically with a startup process lasting approximately 45 seconds. The screen displays the manufacturer’s logo. At the end of the startup process, a startup melody is heard.

Note: Wait approximately 20 seconds before switching on again so as not to damage the electronics and mechanics of the instrument.

Language selection

The software supports multiple languages. The first time the instrument is switched on, the language selection screen will be shown automatically after the startup process.

1. Select the required language.
2. Press OK to confirm the language selection. The self-check will then start automatically.

Change the language setting
The instrument functions in the selected language until the option is changed.

1. Turn the instrument on.
2. During the startup process, touch any point on the screen and maintain contact until the option for selecting a language is shown )approximately 45 seconds(.
3. Select the required language.
4. Press OK to confirm the language selection. The self-check will then start automatically.

Self-check

Each time the instrument is powered up, a test program begins.
During the course of this program )approx. 25 seconds(, system tests, lamp tests, filter calibration, wavelength calibration and voltage tests can be carried out. Each test that functions correctly is marked accordingly.
Note: For error messages during the test program, refer to Troubleshooting.

The Main Menu is displayed when diagnostics are completed.

Sleep mode

The instrument can be put into sleep mode.

1. Briefly press the power switch next to the screen.
The “Sleep mode” message is shown. The screen will then switch off automatically.
2. To switch on, press the power switch next to the screen.
The self-check will start automatically.
After that, the instrument is ready to use.

Power off the instrument
1. Press the power switch next to the screen for approx. 5 seconds.

Standard programs

Overview
Tips for using the touch screen
The whole screen responds to touch. To choose an option, tap with a fingernail, fingertip, an eraser or a specialised stylus. Do not touch the screen with sharp objects, such as the tip of a ballpoint pen.

• Press buttons, words or icons to select them.
• Use scroll bars to move up and down long lists very quickly. Press and hold the scroll bar, then move up or down to move through the list.
• Highlight an item from a list by pressing it once. When the item has been successfully selected, it will be displayed as reversed text)light text on a dark background

Use of the alphanumeric keypad

This display is used to enter letters, numbers and symbols as needed when programming the instrument. Unavailable options are disabled )grayed out(. The icons on the right and left of the screen are described in Table 2.
The central keypad changes to reflect the chosen entry mode. Press a key repeatedly until the desired character appears on the screen. A space can be entered by using the underscore on the YZ_ key.
Press Cancel to cancel an entry, or press OK to confirm an entry.
Note: It is also possible to use a USB keyboard (with US keyboard layout) or a hand-held USB barcode scanner.

Table 2 Alphanumeric keypad

lower case.
# %| Symbols| Punctuation, symbols and numerical sub- and superscripts may be entered..
123| Numeric| For entering regular numbers..
CE| Clear Entry| Clear the entry.
Left Arrow| Back| Deletes the current character and goes back one position.
Right Arrow| Next| Navigates to the next space in an entry.

Main menu

A variety of modes may be selected from the Main Menu. The following table briefly describes each menu option.
There is a toolbar on the right-hand side of the screen. Press to activate the various functions.

Table 3 Main Menu options

Color measurement

| The COLOR MEASUREMENT MODE is

used to determine color values such as Hazen, Gardner and Saybolt. The LICO 690 also offers three-dimensional, absolute colorimetric values, as well as the color scales of CIE Lab*, Hunter Lab or the European Pharmacopoeia.

Color difference measurement

)only LICO 690(

| The mode for COLOR DIFFERENCE MEASUREMENT is used to determine a quantitative color difference between a reference )R( and a sample )P( in the three- dimensional color space )CIE Lab* or Hunter Lab(. In this mode, an additional reference memory for up to 100 references is available.
Option| Function
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Photometry

)only LICO 690(

|

Single Wavelength

| Single wavelength readings are:

Absorbance readings: The light absorbed by the sample is measured in absorbance units.

Transmittance reading )%( : Measures the percent of the original light that passes through the sample and reaches the detector.

Concentration readings: A concentration factor can be entered to enable the measured absorbance values to be converted into concentration values.

Multi Wavelength| In the Multi Wavelength mode, absorbance

)Abs( or percentage transmittance )%T( is measured at up to four wavelengths and absorbance differences and absorbance relationships are calculated. Simple conversions into concentrations can also be carried out.

Time course| The time scan records the absorbance or % transmittance at a wavelength over a defined time.
Wavelength Scan| A wavelength scan shows how the light from a sample is absorbed over a defined wavelength spectrum. This function can be used to determine the wavelength at which the maximum absorbance value can be measured. The absorbance behavior is displayed graphically during the scan.
System Checks| The “System Check” menu contains a number of options, such as instrument information, optical checks, instrument backup, service times, instrument update, settings for analytical quality assurance and lamp history.
Recall measurement data| Saved data can be retrieved, filtered, sent to a printer, memory stick or PC and deleted.
Option| Function
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Instrument Setup

| This menu is used to configure user-specific and/or process-specific settings: operator ID, date and time, security settings, saved data, sound, PC and printer and energy management.

Take and prepare samples
Take a representative sample from the product you wish to measure in accordance with DIN EN ISO 15528 )or ASTM D3925-02(.
If the material shows any signs of turbidity, remove this turbidity by filtration, centrifuging, heating, ultrasound treatment or other suitable means.

Heat partly solid samples before measuring in order to dissolve the solid material in the liquid. The preparation must not cause any chemical changes in the sample.
Make sure that during the measurement there are no bubbles in the sample.

For the color difference measurement, three cuvette types are available that differ in terms of material )glass, PS and PMMA( and path length )10 mm, 11 mm and 50 mm(. Add approx. 2 cm of the sample to the cuvette. The light beam passes through the cuvette approx. 0,5 cm to 1,5 cm above the bottom of the cuvette.
The program calculates the iodine, Hazen, Gardner, Saybolt, Klett and ASTM D 1500 color values automatically and displays the color values. The cuvette type being used is taken into consideration.

A dry thermostat is available for the round disposable glass cuvettes with 11 mm. The dry thermostat heats up the cuvette to any temperature between ambient temperature and 150 °C )302 °F(.

• Always hold the cuvette/sample cell close to the top to make sure that there are no fingerprints in the measurement zone of the cuvette/sample cell. Use suitable transfer pipettes to introduce samples into the cuvettes/sample cells.
• Slowly add samples to the cuvettes/sample cells to make sure air bubbles do not form on the cuvette/sample cell wall and in the sample. Air bubbles will cause false readings.
• If air bubbles are entrapped, remove them by heat, vacuum, ultrasonic treatment or other suitable means.
• Clean the outside of the cuvettes/sample cells thoroughly before inserting them in the cell compartment.

NOTICE Before using disposable cuvettes/sample cells made of PS )Polystyrene( or PMMA )Polymethyl methacrylate(, be sure that the cuvettes/sample cells will not be destroyed by samples, otherwise the cell compartment can be damaged.

Color measurement
Proper sample preparation is extremely important for accurate color measurement. To make sure that an exact measurement is taken, refer to the following sample preparation guidelines:

• Always clean the glass cuvettes/sample cells immediately after use.
• Only use optically preferred samples for measurement. Make sure the cuvettes/sample cells are clean and show no signs of opaqueness.
• Slowly add the liquid to the cuvette in order to prevent the formation of air bubbles in the sample.

The color measurement mode is used to determine absolute color values in the Hazen, Gardner, CIE Lab* or European Pharmacopoeia color scales.
For each cuvette type )11 mm round cuvette and 10 and 50 mm square cuvettes(, an independent calibration data record is used.
It is possible to calibrate the instrument with one, two or three types of cuvettes/sample cells and to use these different cuvette/sample cell types in parallel.

To use the 10 mm square cuvette and 11 mm round cuvettes, adapter Z must be inserted into the cuvette compartment )2(. For measurements with 50 mm square cuvettes, you must remove the adapter.

Take a color measurement

1. Press Color Measurement.

2. Insert a cuvette/sample cell with distilled water to calibrate.
   Note: Always carry out the calibration very carefully, as a faulty calibration can cause inaccurate results to be obtained.

3. The calibration starts automatically once the instrument has detected the cuvette.
   The type of cuvette/sample cell used and the exact progress of calibration is shown in a separate window.

4. After calibration, the cuvette size used is displayed in the top right.
   Note: After calibration, you can measure the cuvette with distilled water again as a sample.
   The displayed measured values should match the uncolored color indices (i.e. Hazen = 0, Gardner = 0.0, CIE Lab* = 100.0, 0.0, 0.0, etc.)

5. Insert the test cuvette.
   The measurement starts automatically.
   The result of the color calculation is displayed.
   Note: The bar on the right next to the result shows the result relative to the measurement range.

6. For the next measurement, remove the cuvette and insert the next sample cuvette, or press Measure to measure the same sample again.
   Touch-sensitive areas in measurement mode
   In measurement mode, there are touch-sensitive areas that give you

selected in the Operator ID color scale list for display.
3| Open Sample ID to change or add the sample ID.
4| Change the Upper Limit of the color range.
5| Change the Lower Limit of the color range.
6| Open Comments to enter a comment.

Parameter setup options
Press Options to set up the parameter.

Table 4 Color measurement options

Setup > Auto Store: Off **is selected.

Symbol: Recall Data , if Instrument Setup > Data Log Setup > Auto Store: On is selected.

Send Data icon| To send data to a printer, computer or USB memory stick )USB A( or network.
Color Scale| Select the color scale

View Graph View Table View Values

| VIEW GRAPH shows the spectral graph of the transmittance or absorbance graph.

Note: View Graph is activated after the first measured value.

VIEW TABLE displays the spectral transmittance values T% from 380 nm to 720 nm.

VIEW VALUES displays the result of the last color calculation.

Scale & Units

| UNITS : Select absorbance or transmittance.

SCALE : In the automatic Scale mode, the y-axis is automatically adjusted so that the total scan is displayed. The manual Scale mode allows sections of the scan to be displayed.

Ph.Eur.: Auto| European Pharmacopoeia

Select AUTO or the REQUIRED SCALE

Color Scale Selection

| Define 3 different color scale combinations with up to 3 different color scales for the result display.

Selection 1 : Klett Color No. + Yellowness Index

Selection 2 : Klett Color No. + ADMI Color No. + Yellowness Index

Selection 3 : Yellowness Index + individual transmittance

Illuminant/Observer: C/2°| Illuminant : Select C, A or D65

Observer : 2° or 10°

Color Scales for Operator ID| Individual selection of the color scales for the operator ID.

Troubleshooting

process or contact the manufacturer or national agent.
An error occurred when reading from the USB memory stick.|  | Restart the process or contact the manufacturer or national agent.
An error occurred when writing to the USB memory stick.|  | Restart the process or contact the manufacturer or national agent.
Please check on the current update file.| Error during update.| Check the USB memory stick.
Please contact Customer Service.| Error during update.| Contact the manufacturer or national agent.
Please check network configuration.|  | Check the network setup.
Please check the connection.|  | Check the network setup.
Please close the cover.|  | Close the cuvette compartment cover.
Please insert the USB memory stick.|  | Insert a USB memory stick into a USB A port on the instrument.
Please check the connection and contact the administrator.| Network setup error| Check the network setup or contact the manufacturer or national agent.
File for instrument update missing.| Error during update.| Check the USB memory stick.
File for instrument update is faulty.| Error during update.| Save the update file again and repeat the procedure.

It’s recommended to execute a Full System Check

| ****

Check of the air values failed

| Switch the instrument off and then back on again. If the system test is unsuccessful, contact the manufacturer or national agent.
Entry invalid!| Password incorrect| Forgotten your password?

Contact the manufacturer or national agent

Absorbance > 3.5!| The measured absorbance exceeds 3.5| Dilute sample and measure again
**Color = ***| Color value outside measurement range.| Dilute the sample or select appropriate color scale.
Error displayed| Definition| Resolution
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Error when calling up the local IP address.| Network setup: DHCP client has no connection to the DHCP server| Enter the IP address again.
Error during default gateway setup.| Network setup: default gateway cannot be set for fixed IP address| Try to create the connection again.
Error during network drive setup!| Error during network setup| Check the settings.
Error during subnet mask setup.| Network setup: Subnet mask cannot be set for fixed IP address| Enter the subnet mask again.
Error copying from USB memory stick.| Error during update| Restart the process or contact the manufacturer or national agent.
Fault**

Test program stopped! Please check lamp Close the lid.

Error [xx]

| ****

Test program stops when the instrument is started

| ****

Check the lamp and replace it if necessary. Close lid.

Press Start Again.

Fault

Test program stopped! Please remove the cuvette

Close the lid.

| ****

Test program stops when the instrument is started

| Remove the cuvette/sample cell from the cell compartment.

Press OK.

Error

Selfcheck stopped. Hardware error.

Error [x]

| ****

Electronic defect

| ****

Contact the manufacturer or national agent and specify the error number.

Error

Too much ambient light! Move instrument into shade or close the lid

| ****

The instrument sensors detects too much ambient light.

| ****

Decrease ambient light. Avoid direct sunlight. Close lid.

No instrument backup present!|  | Check the USB memory stick.
No valid data for these parameters!| Data analysis not possible, no measurement data| Change the selection.
No valid data found!| Data cannot be viewed in the data log| Change the selection.
Error displayed| Definition| Resolution
---|---|---
No measurement data present!| Data analysis settings cannot be configured without measurement data.| Change the selection.
Control range not reached!| Data analysis limits not reached| This is a warning notice. The control limit set was not reached.
Control range exceeded!| Data analysis limits exceeded.| This is a warning notice. The control limit was exceeded.
Concentration too high!| Calculated concentration is higher than 999999| Dilute sample and measure again
Possible interference by:| Interference Check| The analysis is possibly erroneous due to interferences.
Possible interference from:| Interference Check| The analysis is possibly erroneous due to interferences.
Next service is due!|  | Contact the manufacturer or national agent for an instrument service.
Negative result!| The calculated result is negative| Check concentration of sample
Network switched off.| Network setup off, when access to homepage via sidebar| Activate the online connection.
Remote server cannot be reached.| Error during network setup| Make sure that the instrument is connected to the network.
Unstable lighting conditions!|  | Avoid direct sunlight at the measuring location.
Please insert adapter Z.| For measurements with 11 mm round cuvettes, adapter Z is required.| Insert adapter Z into cell compartment )2(. Confirm with OK.
Insufficient memory for update .| Error during update.| Select a memory with more space.

System check incorrect!

| ****

Measurement of air values failed

| Switch the instrument off and then back on again. If the system test is unsuccessful, contact the manufacturer or the national agent.
Temperature too high. Measurement not possible!|  | Switch of the instrument and allow it to cool for a few minutes. If necessary, move it to a cooler place.
Update file is faulty.| Error during update.| Save the update file again and repeat the procedure.
USB memory stick is not connected.| Update not possible.| Check the USB memory stick.
Web server cannot be reached.| Instruments homepage not available| Try the connection again later.

Replacement Parts

Accessories

Certified test filter set for self-checks )Verification Kit( 4 precision glass filters with nominal values| LZM339
“Addista-color” certified testing solution set consisting of 6 certified test solutions| LZM282
11 mm round cuvettes, glass, 560 units| LYY621
10 mm square cuvettes, glass, 3 units| LZP045
50 mm square cuvette, glass, 1 unit| LZP167
50 mm square cuvettes, PMMA with cover, 20 units| LZM381
50 mm square cuvettes, PMMA, 50 units| LZM130
USB flash drive| LZV791
Hach Lange Online Data for direct data transfer to MS Excel| LZV799
Protective cap for USB port| LZV881
USB extension cord| LZV567
Ethernet cable, shielded, 2 m| LZV873
Interface cable USB – computer| LZV632

References

• Geräte und Reagenzien für die Wasserqualitätsanalyse | Hach
• Hach | Hach

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