Thermo Scientific AQUAfast AQ3140 COD User manual

AQUAfast AQ3140 COD Colorimeter
User Guide
Version 1
XCALI-97414 Revision A • February 2017

Version 1 02/2017 AQ3140 COD Colorimeter PROFORMA User Guide
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• Special functions ...................................4
Display Backlight ...................................4
Recall of Stored Data ................................4
• General Notes .....................................4
Battery Replacement ................................4
Method Notes .....................................5
Chemical method notes ..............................5
Guidelines for photometric measurements ................5
• Methods..........................................6
COD.............................................6
Preparing the Sample................................6
Measurement ......................................6
• Menu options ......................................8
Menu Selections....................................8
Recall of Stored Data ................................8
Setting Date and Time ...............................8
• Calibration Mode ...................................9
User Calibration ....................................9
Factory Calibration Reset ............................10
• Technical Data ....................................11
Operating Messages ...............................12
Error Codes ......................................12
Technical Support .................................13
Ordering Information................................13
ContentsImportant Information
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.
Important disposal instructions for batteries and accumulators
EC Guideline 2006/66/EC requires users to return all used and worn-out batteries and accumu-
lators. They must not be disposed of in normal domestic waste. Because our products include
batteries and accumulators in the delivery package our advice is as follows :
Used batteries and accumulators are not items of domestic waste. They must be disposed of in a
proper manner. Your local authority may have a disposal facility; alternatively you can hand them
in at any shop selling batteries and accumulators. You can also return them to the company which
supplied them to you; the company is obliged to accept them.
Important Information
To Preserve, Protect and Improve the Quality of the Environment
Disposal of Electrical Equipment in the European Union
Because of the European Directive 2012/19/EU your electrical instrument must not be disposed
of with normal household waste! Thermo Scientic will dispose of your electrical instrument in a
professional and environmentally responsible manner. This service, excluding the cost of trans-
portation is free of charge. This service only applies to electrical instruments purchased after 13th
August 2005. Send your electrical Thermo Scientic instruments for disposal freight prepaid to
your supplier.

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Chemical method notes:
Method:
The organic material present in the sample is oxidised by a standard amount of a potassium dichromate oxidising mix-
ture. After oxidation is complete, the excess of this reagent is measured photometrically.
Application:
Samples can be measured if the chloride content does not exceed 1000 mg/l (LR/MR) or 10 000 mg/l (HR).
In exceptional cases, compounds contained in the water cannot be oxidized adequate. This results in minimum ndings,
compared with the reference method.
Dierent methods of sampling, preparation of the sample itself and the time elapsed between taking the sample and
analysis can all aect the obtained results.
Special functions - General Notes
Display Backlight
Press the [Option] key to turn the display backlight on or o. The backlight is switched o auto-
matically during the measurement.
Recall of Stored Data
If the instrument is switched on, press the [Option] key for more than 4 seconds to access the
recall menu.
Option
Option
General Notes
Method Notes
• Prior to measurement ensure that the sample is suitable for analysis (no major interferences) and does
not require any preparation i.e. pH adjustment, ltration etc.
• Reagents are designed for use in chemical analysis only and should be kept well out of the reach of
children.
• Ensure proper disposal of reagent solutions.
• Safety Data Sheets are available on request.
CAUTION:
To ensure that the instrument is water proof:
seal ring (E) must be in position
battery compartment cover (B) must be xed with the four screws
If the batteries are removed for more than one minute the date and time menu starts automatically when the photo-
meter is switched on the next time.
Battery Replacement:
AAA/LR03
AAA/LR03
AAA/LR03
AAA/LR03
(D) batteries
(E) seal ring
(C) notch
(F) instrument back
(B) battery com-
partment cover
(A) screws
Guidelines for photometric measurements
1. Run samples and blanks with the same batch of vials.
The blank is stable when stored in the dark and can be used for further measurements with vials from
the same batch.
2. Don't place hot vials in the adapter. Allow the vials to cool to room temperature for minimum 45 minutes.
It is recommended to leave the vials to cool over night.
3. Suspended solids in the vial lead to incorrect measurements. For this reason it is important to place the
vials carefully in the adapter. The precipitant at the bottom of the sample should not be suspended.
4. Clean the outside of the vials with a towel to remove ngerprints or other marks .
5. Avoid spillage of water or reagent solution into the sample chamber because this can lead to incorrect
test results.
6. Contamination of the transparent cell chamber can result in wrong readings. Check at regular intervals
and – if necessary – clean the transparent cell chamber using a moist cloth or cotton buds.
7. Large temperature dierences between the instrument and the environment can lead to errors – e.g. due
to the formation of condensation in the cell chamber or on the vial.
8. To avoid errors caused by stray light do not use the instrument in bright sunlight.

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Measurement
Fix the adapter for 16 mm vials on the sample chamber.
Switch the unit on using the [ON/OFF] key.
The display shows the following: Lr (low range), Mr (medium range) or Hr (high range)
Select the required test using the [MODE] key.
Scroll Memory (SM)
To avoid unnecessary scrolling for the required test range, the instrument memorizes the last
range used before being switched o. When the instrument is switched on again, the scroll list
comes up with the last used test range rst.
The display shows the following: Lr, Mr or Hr
On
Off
Zero
Test
Mode
COD
Select the appropriate vial for the desired range:
Reagent Quantity Cat. No.
COD LR 0 - 150 mg/l
COD MR 0 - 1500 mg/l
COD HR 0 - 15000 mg/l
25 CT
150 CT
25 CT
150 CT
25 CT
150 CT
CODL00
CODL150
CODH00
CODM150
CODHP0
CODH150
Preparing the Sample
Open a reaction vial with a white cap and add the specied volume.
(Ensure that appropriate personnel safety equipment is used.)
LR/MR: 2 ml water sample
HR: 0.2 ml water sample
Prepare a blank (Note 1) by using deionised water (TOC-free) instead of the sample (LR/MR: 2 ml, HR: 0.2 ml).
Replace the cap tightly. Invert the vial gently several times to mix the contents (Caution: The vial will become hot during
mixing!) and digest the vials for 120 minutes in the reactor at a temperature of 150°C. Remove the vials from the reactor
and allow them to cool down to 60°C or less. Mix the contents by inverting each vial several times while still warm. Then
allow the vials to cool to ambient temperature before measuring.
Place the blank in the adapter (Note 1–4) making sure that the marks are aligned.
Blanks are specially prepared for each individual test range.
Press the [ZERO/TEST] key.
The "Lr, Mr or Hr" symbol ashes for approx. 8 seconds.
The display shows the following: 0.0.0
After zeroing remove the vial from the adapter.
Place the sample in the adapter (Note 2– 4) making sure that the marks are aligned.
Press the [ZERO/TEST] key.
The "Lr, Mr or Hr" symbol ashes for approx. 3 seconds.
The result appears in the display.
LR-/MR-range: in mg/l
HR-range: in g/l
The result is saved automatically.
Tolerance: ± 3.5 % (full scale)
Repeating the test:
Press the [ZERO/TEST] key again.
New zero calibration:
Press the [ZERO/TEST] key for 2 seconds.
Zero
Test
Zero
Test
Zero
Test
Methods Methods

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Menu options
Menu Selections
Switch the unit o
Press the [MODE] key and hold.
Switch the unit on using the [ON/OFF] key.
Allow the 3 decimal points to be displayed before releasing the [MODE] key.
The [Option] key allows for selection of the following menu points:
diS recall stored data
dAtE setting the date and time
CAL user calibration
diS – Recall of Stored Data
After conrming the selection with the [MODE] key the photometer shows the last 16 data sets
in the following format (automatically proceeds every 3 seconds until result is displayed):
Number n xx (xx: 16...1)
Year YYYY (e.g. 2014)
Date mm.dd (monthmonth:dayday)
Time hh:mm (hourhour:minuteminute)
Test Method
Result x,xx
The [ZERO/TEST] key repeats the current data set.
The [MODE] key scrolls through all stored data sets.
Quit the menu by pressing [Option] key.
Setting Date and Time (24-hour-format)
After conrming the selection with the [MODE] key the value to be edited will be shown for 2 sec.
The setting starts with the year (YYYY) followed by the actual value to be edited. The same
applies for month (mm), day (dd), hour (hh) and minutes (mm). Set the minutes rst in steps of
10, press the [Option] key to continue setting the minutes in steps of 1.
Increase the value by pressing the [MODE] key.
Decrease the value by pressing [ZERO/TEST] key.
Proceed to the next value to be edited by pressing [Option] key.
After setting the minutes and pressing the [Option] key the display will show “IS SET” and the
instrument returns to the measurement mode.
On
Off
Mode
Option
Mode
Mode
Zero
Test
diS
Mode
SET
DATE
YYYY
(2 sec.)
Mode
Zero
Test
dAtE
Option
Option
CAL
METHOD
0.0.0
METHOD
METHOD
CAL
CAL – User Calibration
Note :
user calibration (Display in calibration mode)
factory calibration (Display in calibration mode)
After conrming the selection with the [MODE] key the instrument will show CAL/"Method".
Scroll through methods using the [MODE] key.
Fill a clean vial with the standard up to the 10 ml mark, screw the cap on and place the vial in
the sample chamber making sure that the marks are aligned.
Press the [ZERO/TEST] key.
The method symbol ashes for approx. 8 seconds.
The display shows the following in alternating mode:
Perform calibration with a standard of known concentration (see "Operation").
Press the [ZERO/TEST] key.
The method symbol ashes for approx. 3 seconds.
The result is shown in the display, alternating with CAL.
If the reading corresponds with the value of the calibration standard (within the specied toler-
ance), exit calibration mode by pressing the [ON/OFF] key.
Changing the displayed value:
Pressing the [MODE] key once increases the displayed value by 1 digit.
Pressing the [ZERO/TEST] key once decreases the displayed value by 1 digit.
Press the corresponding key until the reading equals the value of the calibration standard.
By pressing the [ON/OFF] key, the new correction factor is calculated and stored in the user
calibration software.
Conrmation of calibration (3 seconds).
CAL
cAL
Zero
Test
Zero
Test
CAL
RESULT + x
CAL
Mode
On
Off
Zero
Test
: :
RESULT
Cal
CAL
Menu options - Calibration Mode
Note: The instrument calibration in the range MR is automatically taken also for HR.

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cAL
SEL
SEL
CAL
CAL
SEL
Factory Calibration Reset
Resetting the user calibration to the original factory calibration will reset all methods and ranges.
A user calibrated method is indicated by a "Cal" symbol while the test result is displayed.
To reset the calibration press both the [MODE] and [ZERO/TEST] key and hold.
Switch the unit on using the [ON/OFF] key.
Release the [MODE] and [ZERO/TEST] keys after approx. 1 second.
The following messages will appear in turn on the display:
The factory setting is active.
(SEL stands for Select)
or:
Calibration has been set by the user.
(If the user calibration is to be retained, switch the unit o using the [ON/OFF] key).
Calibration is reset to the factory setting by pressing the [MODE] key.
The following messages will appear in turn on the display:
Switch the unit o using the [ON/OFF] key.
Mode
On
Off
Mode
On
Off
Zero
Test
RESULT
Cal
Calibration Mode
Technical Data
Instrument double wavelength, automatic wavelength selection,
direct reading colorimeter
Light source: LEDs, interference lters (IF) and photosensor in transparent cell chamber.
Wavelength specications of the IF:
430 nm = 5 nm
610 nm = 6 nm
Wavelength accuracy ± 1 nm
Photometric accuracy* 3% FS (T = 20° C – 25° C)
Photometric resolution 0.01 A
Power supply 4 batteries (AAA/ LR 03)
Operating time 17hr operating time or 5000 test measurements in continuous mode when
display backlight is o
Auto-OFF automatic switch o
10 minutes after last keypress
Display backlit LCD (on keypress)
Storage internal ring memory for 16 data sets
Time real time clock und date
Calibration user and factory calibration
resetting to factory calibration possible
Dimensions 155 x 75 x 35 mm (LxWxH)
Weight approx. 260 g (incl. batteries)
Ambient conditions temperature: 5– 40°C
rel. humidity: 30– 90% (non-condensing)
Waterproof as dened in IP 67
CE Certicate for Declaration of CE-Conformity
*measured with standard solutions
To ensure maximum accuracy of test results, always use the reagent systems supplied by the instrument manufacturer.
Technical Data

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Operating Messages - Error Codes
Operating Messages
Measuring range exceeded or excessive turbidity.
Result below the lowest limit of the measuring range.
Replace batteries, no further tests possible.
Battery capacity is too low for the display backlight; measurement is still possible.
A user calibrated method is indicated by a "Cal" symbol while the test result is displayed. (see
"Factory calibration reset").
Error Codes
Light absorption too great. Reasons: e.g. dirty optics.
Calibration factor "out of range"
Too much light reaching the detector.
Too much light reaching the detector.
Battery capacity was too low during measurement. Change battery.
LR: Factory calibration incorrect / erased
LR: User calibration incorrect / erased
HR: Factory calibration incorrect / erased
HR: User calibration incorrect / erased
Hı
Lo
E 10 / E 11
E 20 /E 21
E 22
btLo
E 70
E 71
E 72
E 73
RESULT
Cal
E27 / E28 / E29
E23 / E24 / E25
Technical Support
For any questions or if you require assistance, contact our Technical Support Specialists:
• Email wai.techservbev@thermosher.com
• Within the United States, call 1-800-225-1480
• Outside the United States, call [phone] or fax [phone]
For additional product information, contact your local authorized dealer, Thermo Scientic Orion technical sales represen-
tative or contact us using the Water and Laboratory Products (WLP) information on the back page of this user manual.
Ordering Information
AQ3140 Orion AQUAfast COD colorimeter with eld case, batteries and literature
CODL00 Orion AQUAfast COD low range 0-150 mg/l digestion tubes, 25 tests
CODL150 Orion AQUAfast COD low range 0-150 mg/l digestion tubes, 150 tests
CODH00 Orion AQUAfast COD medium range 0-1500 mg/l digestion tubes, 25 tests
CODM150 Orion AQUAfast COD medium range 0-1500 mg/l digestion tubes, 150 tests
CODHP0 Orion AQUAfast COD high range 0-15000 mg/l digestion tubes, 25 tests
CODH150 Orion AQUAfast COD high range 0-15000 mg/l digestion tubes, 150 tests
COD165 Orion AQUAfast thermoreactor for digestion methods, selectable 100, 120, 150, 160 and
165˚C temperature control settings
CODS01 Orion AQUAfast 1000 mg/l COD standard, 475 mL
CODS10 Orion AQUAfast 10000 mg/l COD standard, 475 mL

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