Camlab CW8200 User manual

Camlab CW8200

Routine Measurement
Press [On/Off]key. Rinse out a clean vial three times with the sample to be tested.Fill the vial with the sample and cap ensuring that all outside surfaces are clean and dry. Place the vial in the sample chamber and align correctly. Put on the sample chamber cover (light shield). Press [Read]or [Read/Avg]key to start measurement. Record the NTU value.
Read/Avg =Measurement with averaging. User-Calibration
Press [Cal]key. Place the <0.1 NTU standard in the sample chamber, making sure that the marks are aligned. Put the sample chamber cover on and press [Read/Avg].Reading starts automatically after count down. Invert the 20 NTU standard and place it into the sample chamber, making sure that the marks are aligned. Put the sample chamber cover on and press [Read/Avg]key. Reading starts automatically after count down. Invert the 200 NTU standard and place it into the sample chamber, making sure that the marks are aligned. Put the sample chamber cover on and press [Read/Avg]key. Reading starts automatically after count down. Invert the 800 NTU standard and place it into the sample chamber, making sure that the marks are aligned. Put the sample chamber cover on and press [Read/Avg]key. Reading starts automatically after count down. Press [ ] key to store or press [ESC]to cancel calibration.
1. 2. 3. 4. 5. 6. 1. 2. 3. 4. 5. 6.
Correct Storing and Handling Standards
T-CAL standards should always be stored in their original vial. Store standards between 5 and 25°C (avoid prolonged exposure to temperatures exceeding 35°C). Store away from direct sunlight. Vials should be stored in their original box which should be closed when not being used. Always allow the standard to acclimatise to ambient instrument temperature before use (not to exceed 35°C). T-CAL Standards have a shelf life of minimum 12 month if stored correctly.
Using <0.1 NTU Standard
After delivery allow the vial to stand for least 24 hours before use.Never shake or invert this <0.1 NTU standard. If the standard has been shaken it can take several hours for all the bubbles dissipate and we suggest the vial is left for at least 24 hours as outlined above.If the standard has been inverted accidentally wait at least 15 minutes before using.
Preparing and Using Standards –infrequent use Note: These instructions apply to all standards excepted the <0.1 NTU standard. If you are using the <0.1 NTU standard follow the instructions above.These instructions apply to standards that have been sitting undisturbed for more than one week or to new standards. Shake the standard vigorously for 2-3 minutes.
Let the vial stand undisturbed for 5 minutes. Invert the vial between 5-10 times. Immediately place the vial in the sample chamber and wait for 1 minute (count down).
Preparing and Using Standards –frequent use Note: These instructions apply to all standards excepted the <0.1 NTU standard. If you are using the <0.1 NTU standard follow the instructions given above.These instructions apply to frequently used standards (daily or weekly usage).
Invert the vial 10 times. Immediately place the vial in the sample chamber and wait for 1 minute (count down).
• • • • • 1. 2. 3. 4. 1. 2.
Short manual

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Safety precautions
CAUTION
Turbidity Standards and T-CAL Standards are formulated for chemical analysis and
must not be used for any other purpose. Reagents must not get into the hands of
children. Some of the reagents contain substances which are not entirely harmless
environmentally. Be aware of the ingredients and take proper care when disposing of
the test solution.
CAUTION
Please read the instruction manual before unpacking, setting up or using the
turbidimeter. Please read the description completely before performing the test. Be
aware of the risks of using the required reagents by reading the MSDS (Material
Safety Data Sheets). Failure could result in serious injury to the operator or damage to
the instrument.
CAUTION
Use the charger unit only with rechargeable batteries. Failure can result in serious injury
to the operator or damage to the instrument.
Do not use charger with non rechargeable batteries.
CAUTION
The accuracy of the instrument is only valid if the instrument is used in an environment
with controlled electromagnetic disturbances according to DIN 61326.
Wireless devices. e.g. wireless phones, must not be used near the instrument.

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Table of contents
Part 1 Description...............................................................................................5
1.1 General description...........................................................................................6
1.2 Functional principle...........................................................................................7
1.3 Factory adjustment............................................................................................7
1.4 Important notes ................................................................................................7
1.4.1 Guidelines for turbidity measurements ..............................................................7
1.4.2 Cleaning of vials & Sampling vessels..................................................................8
Part 2 Operating manual...............................................................................9
2.1 Operating......................................................................................................10
2.1.1 Commissioning ...............................................................................................10
2.1.2 Saving data - Important notes .........................................................................10
2.1.3 Replacement of rechargeable batteries resp. Lithium battery............................10
2.1.4 Charging the rechargeable batteries................................................................10
2.1.5 Fuse................................................................................................................11
2.1.6 Protective caps................................................................................................11
2.2 Overview of funktion keys..........................................................................12
2.2.1 Overview.........................................................................................................12
2.2.2 Displaying time and date.................................................................................12
2.2.3 User countdown..............................................................................................13
2.3 Operation mode ...........................................................................................14
2.3.1 Automatic switch off.......................................................................................14
2.3.2 Turbidity measurement....................................................................................14
2.3.2.1 Read/ Avg key - measurement with Signal Average..........................................14
2.3.2.2 Read key - quick measurement........................................................................14
2.3.2.3 Perform Turbidity measurement.......................................................................15
2.3.3 Storing results ................................................................................................16
2.3.4 Printing results ................................................................................................17
2.3.5 User-calibration...............................................................................................18
2.3.5.1 When to calibrate............................................................................................18
2.3.5.2 Calibration Procedure......................................................................................18
2.3.6 Calibration Standards......................................................................................19

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2.3.6.1 T-CAL Standards - Correct Storage and Handling.............................................19
2.3.7 Formazin-Standards - Preparation and Handling .............................................20
2.3.7.1 Preparation of Dilution Water..........................................................................20
2.3.7.2 Preparation of 4000 NTU Formazin-stock solution...........................................20
2.3.7.3 Preparation of dilutions from the 4000 NTU Formazin-stock solution...............21
2.3.8 Measurement techniques................................................................................22
2.3.8.1 Degassing - Removal of Bubbles......................................................................22
2.3.8.2 Measurement of high turbidity values..............................................................23
2.3.8.3 Measurement of low turbidity values...............................................................23
2.3.8.4 Indexing and matching sample vials.................................................................24
2.3.8.5 Indexing a single sample vials..........................................................................24
2.3.8.6 Indexing a set of sample cells ..........................................................................25
2.4 Photometer settings <Mode-Menü>...........................................................27
2.4.1 blank because of technical requirements
2.4.2 Instrument basic settings 1..............................................................................31
2.4.3 Printing of stored results..................................................................................35
2.4.4 Recall / delete stored results.............................................................................33
2.4.5 – 2.4.8 blank because of technical requirements
2.4.9 Instrument basic settings 2 .............................................................................39
2.4.10 Instrument special functions / service...............................................................39
2.5 Data transfer ................................................................................................40
2.5.1 Connection to a Printer...................................................................................40
2.5.2 Data transfer to a personal computer (PC).......................................................40
2.5.3 Internet-Updates.............................................................................................40
Part 3 Enclosure.................................................................................................41
3.1 Unpacking.......................................................................................................42
3.2 Delivery content..............................................................................................42
3.3 blank because of technical requirements
3.4 Technical Data.................................................................................................43
3.5 Abbreviations..................................................................................................44
3.6 Trouble-shooting ............................................................................................45
3.6.1 Operating messages in the display / error display.............................................45

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Part 1
Descriptions

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1.1 General description
The CW8200 is aportable turbidity meter,based on the requirements of ISO 7027 (Water
Quality –Determination of Turbidity). The instrument works with rechargeable batteries as
well as with mains. As soon as the CW8200 is connected with the adapter to the mains
the batteries are charged.
The instrument featuring auto ranging over the range of 0.01 to 1100 NTU/FNU.
Calibration Standards which guarantee stability and reproducibility of the results. The turbi-
dimeter is kept in the case with accessories and spares including the supplied. Always close
the sample chamber for the protection of dust.
1.2 Functional principle
Theinstrumentmeasuresturbidityinarangeof 0.01to1100NTU/FTUfeaturingautoranging.
The light source is an infrared LED (light emitting diode) with a wavelength of 860 nm.
The emitted light is reflected by turbidity
in the sample. The scattered light will
be detected under an angle of 90° by a
photo diode.
This principle is part of ISO 7027.
The international Reference Standard for
turbidity is a Formazin solution. Results
related to these standards are indicated as
FNU (Formazine Nephelometric Units).
1.1 General description
The CW8200 is aportable turbidity meter,based on the requirements of ISO 7027 (Water
Quality –Determination of Turbidity). The instrument works with rechargeable batteries as
well as with mains. As soon as the CW8200 is connected with the adapter to the mains
the batteries are charged.
The instrument featuring auto ranging over the range of 0.01 to 1100 NTU/FNU.
Calibration Standards which guarantee stability and reproducibility of the results. The turbi-
dimeter is kept in the case with accessories and spares including the supplied. Always close
the sample chamber for the protection of dust.
1.2 Functional principle
Theinstrumentmeasuresturbidityinarangeof 0.01to1100NTU/FTUfeaturingautoranging.
The light source is an infrared LED (light emitting diode) with a wavelength of 860 nm.

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1.3 Factory adjustment
The turbidimeter CW8200 is adjusted with Formazin Primary Standardat the factory and
does not require user-calibration before use. See chapter 2.3.5 User-Calibration.
1.4 Important Notes
1.4.1 Guidelines for turbidity measurements
a) Vials and caps should be cleaned thoroughly after each test to avoid influences.
Minor residuals can cause errors.
b) The outside of the vial must be clean and dry, beforestarting the Test.
Wipe the vials with a smooth cloth to remove fingerprints or waterdrops.
c) The vials must be positioned in the sample chamber with the mark on the vial aligned
with the mark on the instrument.
d) Always perform test with closed vials.
e)
Bubbles on the inside of the vial lead to errors . See chapter 2.3.8.1 Removing bubbles
(Degassing)
f) Avoid spillage of water in the sample chamber. If water should leak into the instrument,
it can destroy electronic components and cause corrosion.
g) Contamination of the lens in the sample chamber can result in errors. Check at regular
intervals – and if necessary – clean the light entry surfaces of the sample chamber using
a moist cloth or cotton buds.
h) Large temperature differences between the instrument and the environment can lead to
errors – e.g. due to the formation of condensation in the area of the lens or on the
vial.
For best results, perform tests with sample temperatures between 20°C (68°F) and
25°C (77°F).
i) To avoid errors caused by stray-light do not use the instrument in bright sunlight.
j) Use the instrument in a clean, dust-free enviroment on a table, that is free of
vibration / agitation.

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1.4.2 Cleaning of vials & Sampling vessels
Vials, caps and sampling vessels should be cleaned thoroughly after each test to avoid influ-
ences. Minor residuals can cause errors.
Residuals:
According to the type of measured sample it is necessary to clean the vial with different
cleaning operations.
• Replace scratched vials immediately.
• Rinse vials continuous with deionized water after each measurement.
• Clean all glassware continuous with laboratory detergent and rinse with deionized water
thoroughly.
• Cleanheavyconterminationsbyfillingthevialswith1:1HCLfollowedbymultiplerinseswith
distilled or deionized water.
• Allow vials to air dry.
• Touch vials at the top only to minimize dirt and fingerprints.
• Wipe the vials with a lint-free cloth to remove waterdrops and fingerprints.

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Part 2
Operating manual

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2.1 Operation
2.1.1 Comissioning
Beforeworking with the CW8200 insert the rechargeable batteries and the Lithium battery
(part of delivery). The rechargeable batteries are not charged. See chapter 2.1.2 Saving data
– Important Notes, 2.1.3 Replacement of rechargeable batteries resp. Lithium battery. and
2.1.4 Charging the rechargeable batteries.
Beforeusing the CW8200 select language (mode 10), select mode 34 and perform “Delete
Data”. Set date and time (see chapter 2. Instruments settings).
2.1.2 Saving data – Important Notes
The Lithium battery saves data (stored results and photometer setting) if there is no power
from the power supply from the rechargeable batteries or the mains adapter.
Recommendation: Exchange of the lithium battery every 5 years.
Note: When neither mains adapter nor batteries supply energy to the instrument, all stored
data and settings will be lost, if the lithium battery is taken out.
Recommendation: Keep the instrument connected to mains adapter supply while chan-
ging the lithium battery.
2.1.3 Replacement of rechargeable batteries resp.
Lithium-battery
1. Switch the instrument off.
2. If necessary remove vial from the sample chamber.
3. Place the instrument upside down on a clean and even surface.
4. Unscrew the two screws (A) of the battery compartment cover (B).
5. Lift battery compartment cover off.
6. If necessary remove old rechargeable batteries (C) and/or the Lithium-battery (D).
7. Place 7 new rechargeable batteries and/or the Lithium-battery.
Ensuring the correct polarity!
8. Replace the battery compartment cover.
9. Tighten the screws carefully.
CAUTION:
Dispose the used batteries in accordance with all federal, state and local regulations.
2.1.4 Charging the rechargeable batteries
The rechargeable batteries are charged in the instrument. As soon the CW8200 is con-
nected by the adapter to the mains the batteries are charged.
Empty rechargeable batteries should be charged in the instrument for at least 5 days.
10 charging and discharging cycles are necessary before the rechargeable batteries obtain
their full capacity.

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2.1.5 Fuse
The instrument has a fuse (E) (type: 1 A, inert, 20 mm).
Ifan replacementis necessaryproceedas describedin “Replacementof rechargeablebatteries
resp.Lithium-battery".If theinstrument canbeoperated withthemains adapterbutnot with
the recharcheable batteries, the fuse could be defect (try new recharcheable batteries first).
2.1.6 Protective caps:
If not used protect the two connections against damage (e.g. corrosion) caused by environ-
mental influences (e.g. dust or splashing) keep the protective caps in place (G).
(A) srews
(B) battery compartment cover
(C) rechargeable batteries: 7 Ni-MH-rechargeable batteries (Typ AA, 1100 mAh)
(D) battery: Lithium battery (Typ CR 2032, 3V)
(E) fuse 1 A, inert, 20 mm
(F) instrument
(C) rechargeable
battery (E) fuse (D) battery
(A) srews
protective
caps
(G) connections
power
supply
(B) battery
compartment cover
(F) instrument back

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2.2 Overview of funktion keys
2.2.1 Overview
Switch the instrument on or off
Returning to previous menu
Function key: description in the text if key available
Function key: description in the text if key available
Function key: description in the text if key available
Confirming
Menu of instrument settings and further functions
[ ] [ ] Moving the Cursor “>>” up resp. down
Storing of displayed test result
Perform a measurement with signal averaging
Perform a measurement
Displaying date and time / user-countdown
Perform a calibration
2.2.2 Displaying date and time
Press [„clock”] key.
The display shows:
After 15 seconds the turbidity meter reverts
to the previous display automatically
or press [ ] key or [ESC].
Mode
Store
ON
OFF
19:27:20 15.06.2006
F3
F2
F1
Esc
Esc
Read
Cal
Read
Avg

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2.2.3 User-countdown
With this function the operator is able to define his own countdown.
Press [“clock”] key.
The display shows time and date:
Press [“clock”] key.
The display shows:
Either press [ ] key to accept the last used user-count-
down
or
press one number key to start entering a new value
The entering comprises two digits each.
Enter minutes and seconds
e.g.: 2 minutes, 0 seconds = [0][2][0][0]
Confirm with [ ] key.
The display shows:
Start count down with [ ] key.
After countdown has finished the Instrument reverts to the
previous display automatically.
19:20:20 15.06.2006
Count-Down
mm : ss
99 : 99
Count-Down
02:00
Start:
0200

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2.3 Operation mode
Switch the instrument on by pressing the [ON/OFF] key.
The instrument performs an electronic self-test.
2.3.1 Automatic switch off
Theinstrumentautomaticallyswitchesoffafter20 minutes.Thisisindicated30secondsbefore
by a beeper. Press any key to avoid the instrument switching off. As long as the instrument is
working (for example countdown or printing) the automatic switch off is inactive.
2.3.2 Turbidity measurement
2.3.2.1 Read/ Avg key
measurement with Signal Average
Press [Read/Avg] key to perform a test with signal average
function.
By pressing the [Read/Avg] key Signal Average function is active. Signal averaging measures
and averages 45 measurements. The signal averaging feature provides compensation for
fluctuations caused by random drifting particles in the sample.
The result is shown in NTU.
2.3.2.2 Read key - quick measurement
Press [Read] key to perform a quick test.
By pressing the [Read] key Signal averaging function is not active. The TurbiDirect measures
and averages 9 measurements.
The result is shown in NTU*.
ON
OFF
Autotest ...
Read
Read
Avg

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2.3.2.3 Perform Turbidity measurement
Accurate turbidity measurements depend on good, consistent measurement techniques.
Including operation with clean samples vials in good condition and removing air bubbles.
Samples should be measured immediately to prevent changes in sample characteristics due
to temperature shifts and settling.
Performance:
Take a representative sample in a clean container.
Fill a clean and dry vial with the water sample up to the
mark (approx. 12 ml).
Cap the vial.
Take care to handle the vial by the top. Wipe the vial with
a smooth and lint-free cloth to remove waterdrops and
finger prints.
Switch on the instrument.
ON
OFF

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2.3.3 Storing results
Press [STORE] during the test result is displayed.
The display shows:
We advise you to enter a numeric code (up to 6
digitslong).(A code-No.cancontainreferencesto the
operator or the sample-taking place.)
After entering confirm with [ ] key.
If a code number is not necessary confirm by pressing
[ ] directly. (The assignment for the Code-No. is then
0 automatically.)
•
•
Store
Code-No.:
_ _ _ _ _ _
000001
Place the vial in the sample chamber making sure that the
positioning is correct.
Close the sample chamber with the cap.
Press [Read/Avg] or [Read] key.
The result is shown in the display in NTU.
Remove the vial and clean it.
Read
Avg or Read
1.02 NTU*
or1.00 NTU

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2.3.4 Printing results
If a printer is installed and switched on, it is possible to print out the test results (without
saving before).
Press F3 key.
The complete data set is printed: date, time, Code-No. and
test result. Printing example:
2006-07-01 14:53:09
Test No.:1
Code-No.:1
2,13 NTU*
The Test No. is a system number for data storage capacity
and is set automatically if a test result is stored. It appears
only at the print out.
The data set is stored with date, time, Code-No. and test
result.
The display shows:
The test result is then shown again.
Note:
The display shows the number of free data sets.
If there are less than 30 data sets free the display shows:
Clear the memory as soon as possible (see chapter 2.4.4
Delete stored results). If memory capacity is used up it
would be impossible to save additional test results.
Stored!
F3
Storage:
only 29 free records left
Storage: 900
free records left

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2.3.5 User-calibration
2.3.5.1 When to calibrate
The turbidimeter was adjusted at the factory with Formazin Primary Standard and does not
require user-calibration before use.
As the electronical and optical design of this instrument provides long-term stability the
need for frequent calibration is minimized. Perform calibration with T-CAL every 3 month
or if required more often.
2.3.5.2 Calibration Procedure
Note: Calibration may be canceled at any time by pressing the [ESC] key (not during a current
Count-downs). The latest Calibration persist.
Press the [Cal] key to start the calibration.
Place the <0.1 NTU Standard in the sample chamber
making sure that the marks aligned. Place the cover on
the instrument.
Press [Read/Avg] key.
The Count-down starts.
After the Count-down is finished the reading starts
automatically.
Place the 20 NTU Standard in the sample chamber
making sure that the marks aligned.
Place the cover on the instrument.
Press [Read/Avg] key.
The Count-down starts.
After the Count-down is finished the reading starts
automatically.
Place the 200 NTU Standard in the sample chamber
making sure that the marks aligned.
Place the cover on the instrument.
Press [Read/Avg] key.
The Count-down starts.
After the Count-down is finished the reading starts
automatically.
Place the 800 NTU Standard in the sample chamber
making sure that the marks aligned.
Place the cover on the instrument.
<NTU adjustment>
standard:
<0,1 NTU
Count-Down
1:00
Cal
Read/
Avg
<NTU adjustment>
standard:
20 NTU
Read/
Avg
Count-Down
1:00
<NTU adjustment>
standard:
200 NTU
Count-Down
1:00
Read/
Avg
<NTU adjustment>
standard:
800 NTU