LaMotte COD3 Plus Operator's Manual
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LaMotte COD3 Plus Operator's Manual

Colorimeter
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COD3
Plus
Colorimeter
Operator's
Manual
1925-MN
Version 1.0
11.07.14
V2
.800.561.8187
information@itm.com
www.
.com

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Summary of Contents for LaMotte COD3 Plus

  • Page 1 COD3 Plus Colorimeter Operator’s Manual 1925-MN Version 1.0 11.07.14 .800.561.8187 information@itm.com www. .com...
  • Page 2 .800.561.8187 information@itm.com www. .com...

  • Page 3: Table Of Contents

    Standard Additions ..................18 Sample Dilution & Volumetric Measurements ..........19 Interferences ....................20 Stray Light Interference ................20 ƒ OPERATION OF THE COD3 PLUS COLORIMETER Overview ...................... 21 Components ....................22 ƒ GENERAL OPERATING PROCEDURES The Keypad ....................23 Sample Holders ....................
  • Page 4 Test Sequences ................... 28 General Testing Procedures ................ 29 Testing With LaMotte Pre-Programmed Tests ..........29 Calibrating LaMotte Pre-Progammed Tests ..........32 Measuring in the Absorbance Mode ............36 ƒ EDITING MENU Editing a Sequence ..................39 Adding a Test ....................41 Deleting a Test ....................

  • Page 5: Packaging & Delivery

    Failure to do so could result in personal injury or damage to the equipment. The COD3 Plus Colorimeter should not be stored or used in a wet or corrosive environment. Care should be taken to prevent water or reagent chemicals from wet colorimeter tubes from entering the colorimeter chamber.

  • Page 6: Limits Of Liability

    „ LIMITS OF LIABILITY Under no circumstances shall LaMotte Company be liable for loss of life, property, profits, or other damages incurred through the use or misuse of its products. „ WARRANTY LaMotte Company warrants this instrument to be free of defects in parts and workmanship for 2 years from the date of shipment.

  • Page 7: Specifications

    500 test results stored for download to a PC Waterproof IP67 with USB port plug in place Dimensions (LxWxH) 3.5 x 7.5 x 2.5 inches, 8.84 x 19.05 x 6.35 cm Weight 13 oz, 362 g (meter only) COD3 Plus Colorimeter 11.14 .800.561.8187 information@itm.com www. .com...

  • Page 8: Statistical And Technical Definitions

    Statistics in Analytical Chemistry: Part 7 – A Review, D. Coleman and L Vanatta, American Laboratory, Sept 2003, P . 34. Jeffery G. H., Basset J., Mendham J., Denney R. C., Vogel’s Textbook of COD3 Plus Colorimeter 11.07 .800.561.8187 information@itm.com www.

  • Page 9: Contents And Accessories

    „ CONTENTS AND ACCESSORIES CONTENTS COD3 Plus Colorimeter Test Tubes, with Caps COD/UDV Adapter USB Wall Adapter USB Cable COD3 Plus Colorimeter Quick Start Guide COD3 Plus Colorimeter Manual ACCESSORIES Test Tubes, with Caps Code 0290-6 Replacement Chamber Code 3-0038...

  • Page 10: Epa Compliance

    „ CE COMPLIANCE The COD3 Plus Colorimeter has earned the European CE Mark of Compliance for electromagnetic compatibility and safety. The Declaration of Conformity for the COD3 Plus Colorimeter is available at www.lamotte.com.

  • Page 11: Water Sampling For Chemical Analysis

    Sub-surface sampling is required to obtain a vertical profile of streams, lakes, ponds, and reservoirs at specific depths. This type of sampling requires more sophisticated sampling equipment. For dissolved oxygen studies, or for tests requiring small sample sizes, a Water COD3 Plus Colorimeter 11.14 .800.561.8187 information@itm.com www.

  • Page 12: Filtration

    Sampler (LaMotte Code 1060) will serve as a subsurface or in-depth sampler. This weighted device is lowered to the sampling depth and allowed to rest at this depth for a few minutes. The water percolates into the sample chamber displacing the air which bubbles to the surface. When the bubbles cease to rise, the device has flushed itself approximately five times and it may be raised to the surface for examination.

  • Page 13: An Introduction To Colorimetric Analysis

    Most test substances in water are colorless and undetectable to the human eye. To test for their presence we must find a way to “see” them. The COD3 Plus Colorimeter can be used to measure any test substance that is itself colored or can be reacted to produce a color.

  • Page 14: Reagent Blank

    If possible, use the same tube to SCAN BLANK and SCAN SAMPLE. „ METER CARE The optical system of the COD3 Plus must be kept clean and dry for optimal performance. Dry the colorimeter tubes before placing them in the chamber to avoid introducing moisture.

  • Page 15: Calibration

    Absorbance or %T, and finding the corresponding concentration from the curve. The linear range of the reagent system can be determined and this information can be used to input a User Test into the COD3 Plus Colorimeter (see Edit User Tests, page 39).
  • Page 16 NOTE: Only reagent systems which produce a straight line can be used for a User Test. A sample of each type of graph appears below: COD3 Plus Colorimeter 11.07 .800.561.8187 information@itm.com www.
  • Page 17 0.50 mL 10.0 ppm 3.0 ppm 100 mL 1000 ppm 0.30 mL 10.0 ppm 1.0 ppm 100 mL 1000 ppm 0.10 mL 10.0 ppm 0 ppm 100 mL 1000 ppm 0 mL COD3 Plus Colorimeter 11.14 .800.561.8187 information@itm.com www. .com...

  • Page 18: Standard Additions

    0.5 = 0.8 ppm iron. (Note: any error due to the increased volume from the “spike” is negligible). LaMotte offers a line of calibration standards which can be used to generate calibration curves and perform standard additions. COD3 Plus Colorimeter 11.07 .800.561.8187...

  • Page 19: Sample Dilution & Volumetric Measurements

    „ SAMPLE DILUTION TECHNIQUES & VOLUMETRIC MEASUREMENTS If a test result using the COD3 Plus Colorimeter gives an over range message then the the sample must be diluted. The test should be repeated on the diluted sample to obtain a reading which is in the concentration range for the test. (Note: This is not true for colorimetric determination of pH.)

  • Page 20: Interferences

    „ INTERFERENCES LaMotte reagent systems are designed to minimize most common interferences. Each individual test instruction discusses interferences unique to that test. Be aware of possible interferences in the water being tested. The reagent systems also contain buffers to adjust the water sample to the ideal pH for the reaction.

  • Page 21: X83; Operation Of The Cod3 Plus Colorimeter Overview

    The menus can be displayed in seven different languages. The test library consists of 29 LaMotte tests and 25 “User Tests”. The LaMotte tests are precalibrated for LaMotte reagent systems.The colorimeter displays the result of these tests directly in units of concentration.

  • Page 22: Components

    „ COMPONENTS Figure 1 shows a diagram of the COD3 Plus Colorimeter and its components. COD3 Plus COLORIMETER COD3 Plus Colorimeter 11.07 .800.561.8187 information@itm.com www. .com...

  • Page 23: X83; General Operating Procedures The Keypad

    GENERAL OPERATING PROCEDURES The operation of the COD3 Plus Colorimeter is controlled by a microprocessor. The microprocessor is programmed with menu driven software. A menu is a list of choices. This allows a selection of various tasks for the colorimeter to perform, such as, scan blank, scan sample, and edit test sequences.

  • Page 24: The Display & The Menus

    The display allows menu selections to be viewed and selected. These selections instruct the COD3 Plus to perform specific tasks. The menus are viewed in the display using two general formats that are followed from one menu to the next.
  • Page 25 Pushing EXIT at any time will turn the COD3 Plus off. The display may show the following messages: Battery Status More choices are available and can be viewed by scrolling up and/or down through the display.

  • Page 26: Looping Menus

    LAST CHOICE 12:00:00 001/500 12:00:00 001/500 12:00:00 001/500 AND ANOTHER FIRST CHOICE FIRST CHOICE AND SO ON SECOND CHOICE SECOND CHOICE THIRD CHOICE THIRD CHOICE ANOTHER ANOTHER LAST CHOICE AND ANOTHER AND ANOTHER COD3 Plus Colorimeter 11.07 .800.561.8187 information@itm.com www. .com...

  • Page 27: X83; Testing Testing Menu

    TESTING „ TESTING MENU The Testing Menu is used to run all LaMotte pre-programmed tests, User Tests and Absorbance tests at one of two wavelengths. Testing from any of three sequences can also be done. Main Menu 1. Press and briefly hold to turn the meter on.

  • Page 28: Test Sequences

    User Tests may be placed in these sequences in whatever testing order that is preferred. Some examples of typical sequences are given below. NOTE: Test in the examples may not be included in the COD3 Plus. Sequence 1 Sequence 2...

  • Page 29: General Testing Procedures

    USA) or email at tech@lamotte.com for a current list of available calibrations and downloading instructions. „ TESTING WITH LaMOTTE PRE-PROGRAMMED TESTS NOTE: Test in the examples may not be included in the COD3 Plus. Main Menu 1. Press and briefly hold to turn the meter on.
  • Page 30 Close the lid. Press to scan ENTER the sample. The screen will Scan Blank display READING for about 1 second. The result will appear Scan Sample on the screen. 12:00:00 001/500 COD3 Plus Colorimeter 11.07 .800.561.8187 information@itm.com www. .com...
  • Page 31 Absorbance of the last test can be viewed by choosing %T/Abs. Press EXIT escape to previous menus. NOTE: The menus loop in this screen so either will lead to the menu selection needed. COD3 Plus Colorimeter 11.14 .800.561.8187 information@itm.com www. .com...

  • Page 32: Calibrating Lamotte Pre-Progammed Tests

    The LaMotte Pre-Programmed tests are standardized with one standard solution. To standardize over the full range of the test, the concentration of the standard should be chosen from the high end of the range.
  • Page 33 Close Scan Blank the lid. Press to scan ENTER the blank. The screen will Scan Sample display Blank Done for about 12:00:00 001/500 1 second and then return to the Test Menu. COD3 Plus Colorimeter 11.14 .800.561.8187 information@itm.com www. .com...
  • Page 34 0.30 in this example. %T/Abs NOTE: A maximum adjustment of 10% is possible. Calibrate If an adjustment of over 10% 12:00:00 001/500 is attempted, Overrange will be displayed. COD3 Plus Colorimeter 11.07 .800.561.8187 information@itm.com www. .com...
  • Page 35 1 second and the test menu will appear. The calibration has now been standardized and the meter can be used for testing. The standardization can be removed by repeating the calibration and selecting Factory Setting. COD3 Plus Colorimeter 11.14 .800.561.8187 information@itm.com www. .com...

  • Page 36: Measuring In The Absorbance Mode

    Absorbance. Sequence 1 Sequence 2 Sequence 3 Absorbance 12:00:00 001/500 Absorbance 4. Press to select ENTER Absorbance. 101 Absorbance 428 102 Absorbance 525 103 Absorbance 568 104 Absorbance 635 12:00:00 001/500 COD3 Plus Colorimeter 11.07 .800.561.8187 information@itm.com www. .com...
  • Page 37 102 Absorbance 525 0.425 Press to scan the ENTER sample. The screen will display Reading for about 1 Scan Blank second. The result will appear on the screen. Scan Sample 12:00:00 001/500 COD3 Plus Colorimeter 11.14 .800.561.8187 information@itm.com www. .com...
  • Page 38 EXIT escape to previous menus. NOTE: The menus loop in this screen so either will lead to the menu selection needed. NOTE: The calibrate function does not work in the Absorbance mode. COD3 Plus Colorimeter 11.07 .800.561.8187 information@itm.com www. .com...

  • Page 39: X83; Editing Menu Editing A Sequence

    Editing Menu. Testing Menu Editing Menu Run PC Link 12:00:00 001/500 Editing Menu 3. Press to select Editing ENTER Menu. Edit Sequences Edit User Test Set Clock Logging 12:00:00 001/500 COD3 Plus Colorimeter 11.14 .800.561.8187 information@itm.com www. .com...
  • Page 40 Edit Sequence 3 12:00:00 001/500 EDIT SEQUENCE 2 6. Press to select the ENTER sequence to be edited. 015 Chlorine F UDV 079 Phosphate HR 009 Benzotriazole 076 pH UDV 12:00:00 001/500 COD3 Plus Colorimeter 11.07 .800.561.8187 information@itm.com www. .com...

  • Page 41: Adding A Test

    After adds a new test to the sequence after the selected test. Delete is used to remove an existing test from a sequence. NOTE: Test in the examples may not be included in the COD3 Plus. ADDING A TEST Below is a step-by-step example of how to add a test to SEQUENCE 2 starting from the EDIT SEQUENCE 2 menu.
  • Page 42 Main Menu 8. Press to select Edit ENTER Sequences to continue Testing Menu editing the sequences or Editing Menu press to return to the EXIT Run PC Link Main Menu. 12:00:00 001/500 COD3 Plus Colorimeter 11.07 .800.561.8187 information@itm.com www. .com...

  • Page 43: Deleting A Test

    015 Chlorine F UDV in the EDIT SEQUENCE 079 Phosphate HR menu and the selected test 002 Aluminum will have been deleted. All changes to the sequence will automatically have been 12:00:00 001/500 saved. COD3 Plus Colorimeter 11.14 .800.561.8187 information@itm.com www. .com...
  • Page 44 Main Menu 6. Press to select Edit ENTER Sequences to continue Testing Menu editing the sequences or Editing Menu press to return to the EXIT Run PC Link Main Menu. 12:00:00 001/500 COD3 Plus Colorimeter 11.07 .800.561.8187 information@itm.com www. .com...

  • Page 45: Edit User Tests

    „ EDIT USER TESTS If a test other than the LaMotte programmed tests is performed regularly, a calibration for it may be entered in one of the 25 User Tests. These tests are originally named “User Test 1 - 25”. It will be possible to rename the test, select a wavelength, enter a new calibration, select the number of decimal places used to display the results, and select the units.
  • Page 46 110 USER TEST 06 111 USER TEST 07 12:00:00 001/500 111 USER TEST 07 6. Press to select the User ENTER Test. Name the Test Select Vial/WL STD Calibration Enter Constants 12:00:00 001/500 COD3 Plus Colorimeter 11.07 .800.561.8187 information@itm.com www. .com...

  • Page 47: Naming The Test

    Name the Test 3. Press to scroll to the desired character. In this example, the test name E F G I J K will be H2O. SER TEST 07 12:00:00 001/500 COD3 Plus Colorimeter 11.14 .800.561.8187 information@itm.com www. .com...
  • Page 48 P Q R 111 H2 R TEST 07 12:00:00 001/500 Name the Test 7. Press to scroll to the desired character. L M N P Q R 111 H2 R TEST 07 12:00:00 001/500 COD3 Plus Colorimeter 11.07 .800.561.8187 information@itm.com www. .com...
  • Page 49 Press EXIT 12:00:00 001/500 to save the name. The sreen will display Storing... and the test name for about 1 second and the meter will return to the Edit Test menu. COD3 Plus Colorimeter 11.14 .800.561.8187 information@itm.com www. .com...

  • Page 50: Selecting The Vial And Wavelength

    „ SELECTING THE VIAL AND WAVELENGTH The COD3 Plus Colorimeter accepts three different vials (the 25 mm 0290 tube, UDVs and COD tubes) at 2 different wavelengths (428 and 635 nm). The colorimeter uses different settings for each of the twelve combinations of vial and wavelength.

  • Page 51: Entering A Two Point Calibration

    „ ENTERING A TWO POINT CALIBRATION The COD3 Plus Colorimeter can scan two reacted standards and create a calibration curve. To prepare a calibration curve with multiple data points see Entering a Multiple Calibration Curve (pg. 55). 1. From the User Test menu,...
  • Page 52 9 . – 1 2 3 00000 12:00:00 001/500 Low Standard 7. Press to scroll to the desired character. 9 . – 1 2 3 00000 12:00:00 001/500 COD3 Plus Colorimeter 11.07 .800.561.8187 information@itm.com www. .com...
  • Page 53 001/500 10. After the final character is entered the meter will save the high concentration value. Insert Blank The screen will display instructions for completing the calibration procedure. <Enter> continue 12:00:00 001/500 COD3 Plus Colorimeter 11.14 .800.561.8187 information@itm.com www. .com...
  • Page 54 . The screen will ENTER Name the Test display Reading... for about Select Vial/WL 1 second and the meter will STD Calibration return to the Edit Test menu. Enter Constants 12:00:00 001/500 COD3 Plus Colorimeter 11.07 .800.561.8187 information@itm.com www. .com...

  • Page 55: Entering A Multiple Point Calibration

    „ ENTERING A MULTIPLE POINT CALIBRATION The COD3 Plus can directly create a 2 point calibration curve. (See Entering a Two Point Calibration on page 51.) To create a multiple point calibration curve, constants obtained from a linear regression of multiple data points can be entered into the COD3 Plus.
  • Page 56 7 8 9 – 0 1 – 00000 12:00:00 001/500 Enter K0 6. Press to scroll to the next character. 9 . – 1 2 3 – 00000 12:00:00 001/500 COD3 Plus Colorimeter 11.07 .800.561.8187 information@itm.com www. .com...
  • Page 57 111 H2O entered the meter will save Name the Test the constants. The screen will Select Vial/WL display Storing... and return STD Calibration to the Edit Test menu. Enter Constants 12:00:00 001/500 COD3 Plus Colorimeter 11.14 .800.561.8187 information@itm.com www. .com...

  • Page 58: Selecting The Numerical Format Of The Result

    ENTER decimal places. The screen Select Vial/WL wil display Storing... for about STD Calibration 1 second and the meter will Enter Constants return to the Edit Test menu. Decimal Places 12:00:00 001/500 COD3 Plus Colorimeter 11.07 .800.561.8187 information@itm.com www. .com...

  • Page 59: Selecting Units Of Concentration

    „ SELECTING THE UNITS OF CONCENTRATION The COD3 Plus Colorimeter has seven options for units of concentration. They are No Units, ppm, FAU, pH, ppb, ppt and mgL. 1. From the User Menu, press 111 H2O to scroll to Select STD Calibration Units.

  • Page 60: Setting The Clock

    ENTER character. The time and date Edit Sequences will be saved and the meter Edit User Test will return to the Edit Test Set Clock menu. Logging 12:00:00 001/500 COD3 Plus Colorimeter 11.07 .800.561.8187 information@itm.com www. .com...

  • Page 61: Logging Data

    001/500 Logging 4. Press . The screen will ENTER display Storing... for about Display Test Log 1 second and return to the Enable Logging Logging menu. Disable Logging Erase Log 12:00:00 001/500 COD3 Plus Colorimeter 11.14 .800.561.8187 information@itm.com www. .com...

  • Page 62: Factory Setup

    12:00:00 001/500 „ FACTORY SETUP The Factory Setup menu is used in manufacturing of the COD3 Plus Colorimeter. This menu is not for use by the operator in the field. „ SETTING POWER SAVE The power saving Auto Shutoff feature will turn the meter off when a button has not been pushed for a set amount of time.

  • Page 63: Setting The Backlight Time

    4. Press . The screen will ENTER display Storing... for about Set Clock 1 second and the meter will Logging return to the Editing Menu. Factory Setup Set PWR Save 12:00:00 001/500 COD3 Plus Colorimeter 11.14 .800.561.8187 information@itm.com www. .com...

  • Page 64: Selecting A Language

    4. Press . The screen will ENTER display Storing... for about Logging 1 second and the meter will Factory Setup return to the Editing Menu. Set PWR Save Set Backlight Time 12:00:00 001/500 COD3 Plus Colorimeter 11.07 .800.561.8187 information@itm.com www. .com...
  • Page 65 „ SELECTING A LANGUAGE There are seven languages available in the COD3 Plus: English, Spanish, French, Portuguese, Italian, Chinese, and Japanese. 1. From the Editing Menu, press Editing Menu to scroll to Factory Setup Select Language. Set PWR Save Set Backlight Time...

  • Page 66: Pc Link

    For example, to reset the meter to English: 1. Turn meter on. 2. Press one time. Press ENTER 3. Press seven times. Press ENTER 4. Press ENTER COD3 Plus Colorimeter 11.07 .800.561.8187 information@itm.com www. .com...

  • Page 67: Battery Replacement

    USB cable (USB mini B connector) into the meter and the larger end of the USB cable (USB Type A connector) into a USB port on a computer. The COD3 Plus will send the following data: test name, wavelength, concentration, transmittance, absorbance, sample, blank, time of test, and date of test.

  • Page 68: X83; Maintenance Cleaning

    BATTERY „ BATTERY/AC OPERATION The COD3 Plus may be operated on battery power, using a USB wall adapter or USB computer connection. If using the meter as a bench top unit, use the wall adapter if possible to extend the battery life. The meter will remain on when the USB adapter is used.

  • Page 69: X83; Troubleshooting Error Messages

    LaMotte Company by calling 800- 344-3100 (US only) or 410-778-3100, faxing 410-778-6394, or emailing tech@ lamotte.com. Often a problem can be resolved over the phone or by email. If a return of the meter is necessary, attach a letter with the return authorization number, meter serial number, a brief description of problem and contact information including phone and FAX numbers to the shipping carton.

  • Page 70: Troubleshooting Guide

    This can be done following the user calibration described on page 28. If the user calibration fails to properly adjust the meter then the meter should be returned to LaMotte Company for recalibration. (See page 65).
  • Page 71 Unusually large Incorrect standards Use fresh 0.0 standard negative or used to calibrate in clean tube. Reset positive readings meter. meter to factory default when performing settings. Recalibrate calibration meter. COD3 Plus Colorimeter 11.14 .800.561.8187 information@itm.com www. .com...
  • Page 72 COD3 Plus Colorimeter 11.07 .800.561.8187 information@itm.com www. .com...
  • Page 73 1925-TEST Version 1.0 3.13.11 COD3 Plus Colorimeter 11.14 .800.561.8187 information@itm.com www. .com...
  • Page 74 LaMotte Company continuously updates the list of pre-programmed tests as the calibrations become available. Pre-programmed calibrations can be added to the COD3 Plus Colorimeter in the field. A Windows-based computer running a Windows Operating System and an 8 pin mini-DIN/9 pin F D-submin serial cable (order Code 1771) are required.
  • Page 75 Potassium (022) 0.0-10.0 Tetraphenylboron (2) Silica-Low Range (023) 0.0–4.0 0.05 Heteropoly Blue (4) Silica-High Range (024) 0–75 Silicomolybdate (3) Sulfate-High Range (025) 0–100 Barium Chloride (1) Sulfide-Low Range (026) 0.00–1.50 0.06 Methylene Blue (3) Tannin (027) 0.0–10.0 Tungsto-molybdophosphoric Acid (2) Turbidity (028) 0.0–30.0 Absorption (0)
  • Page 76 .800.561.8187 information@itm.com www. .com...
  • Page 77 *WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
  • Page 78 Use the COD adapter to minimize stray light interference. To further reduce stray light interference, do not scan sample in direct sunlight. COD, Low Range COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 79 A reagent blank should be run with each set of samples and with each lot of reagents. The reacted blank will be stable if stored in the dark. COD3 Plus Colorimeter 3.11 COD, Low Range .800.561.8187 information@itm.com...
  • Page 80 15 minute intervals while the vials are still hot until the reading remains unchanged. The vials should be cooled to room temperature before the final measurement is taken. COD, Low Range COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www.
  • Page 81 *WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
  • Page 82 COD, the sample chamber lid can not be closed. Use the COD adapter to minimize stray light interference. To further reduce stray light interference, do not scan sample in direct sunlight. COD, Standard Range COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 83 A reagent blank should be run with each set of samples and with each lot of reagents. The reacted blank will be stable if stored in the dark. COD3 Plus Colorimeter 3.11 COD, Standard Range .800.561.8187 information@itm.com...
  • Page 84 15 minute intervals while the vials are still hot until the reading remains unchanged. The vials should be cooled to room temperature before the final measurement is taken. COD, Standard Range COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www.
  • Page 85 *WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
  • Page 86 Use the COD adapter to minimize stray light interference. To further reduce stray light interference, do not scan sample in direct sunlight. COD, High Range COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 87 A reagent blank should be run with each set of samples and with each lot of reagents. The reacted blank will be stable if stored in the dark. COD3 Plus Colorimeter 3.11 COD, High Range .800.561.8187 information@itm.com...
  • Page 88 To eliminate error caused by contamination, wash all glassware with 20% sulfuric acid. For greater accuracy, a minimum of three repetitions should be performed and the results averaged. COD, High Range COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 89 *WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
  • Page 90 There are few interferences in most natural waters. High concentrations of reducing agents, such as hydrazine, react with the chlorine donor and can result in negative interferences. Color and turbidity can also interfere. AMMONIA NITROGEN, Low Range COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 91 This test result is the reagent blank. Subtract the reagent blank from all subsequent test results of unknown samples. It is necessary to determine the reagent blank only when a new lot number of reagents is obtained. COD3 Plus Colorimeter 3.11 AMMONIA NITROGEN, Low Range .800.561.8187...
  • Page 92 This test result is the reagent blank. Subtract the reagent blank from all subsequent test results of unknown samples. It is necessary to determine the reagent blank only when a new lot number of reagents is obtained. AMMONIA NITROGEN, Low Range COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www.
  • Page 93 *WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
  • Page 94 This test result is the reagent blank. Subtract the reagent blank from all subsequent test results of unknown samples. It is necessary to determine the reagent blank only when a new lot number of reagents is obtained. AMMONIA NITROGEN, High Range COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www.
  • Page 95 *WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
  • Page 96 18. Insert tube into meter chamber, close lid and select SCAN SAMPLE. Record result in ppm boron. 19. Press to turn colorimeter off or press the to exit to a previous EXIT menu or make another menu selection. BORON COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 97 *WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
  • Page 98 This test result is the reagent blank. Subtract the reagent blank from all subsequent test results of unknown samples. It is necessary to determine the reagent blank only when a new lot number of reagents is obtained. COBALT COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www.
  • Page 99 Collect all samples in clean glassware. Determine PRESERVATION: color as soon as possible to avoid biological or chemical changes that could occur in the sample during storage. INTERFERENCES: Turbidity will interfere. Filter before testing. COD3 Plus Colorimeter 3.11 COLOR .800.561.8187 information@itm.com www. .com...
  • Page 100 9. Insert tube with sample water, close lid and select SCAN SAMPLE. Record result in color units. 10. Press to turn the colorimeter off or press to exit to a previous EXIT menu or make another menu selection. COLOR COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 101 *WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
  • Page 102 It is necessary to determine the reagent blank only when a new lot number of reagents are obtained. The reaction may stain the tubes. Scrub tubes thoroughly after each use. COPPER COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 103 *WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
  • Page 104 EXIT or make another menu selection. NOTE: The reaction may stain the tubes. Scrub the tubes thoroughly after each use. COPPER COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 105 *WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
  • Page 106 EXIT or make another menu selection. NOTE: For the most accurate results, the sample and reagents should be at 25 ±4°C. CYANURIC ACID COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...

  • Page 107: Dissolved Oxygen

    *WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
  • Page 108 Steps 1 through 4 below describe proper sampling technique in shallow water. For sample collection at depths beyond arm’s reach, special water sampling apparatus is required (e.g. the LaMotte Water Sampling Chamber, Code 1060; Model JT-1 Water Samplers, Code 1077; Water Sampling Outfit, Code 3103; or Water Sampling Bottle, Code 3-0026).
  • Page 109 8. Remove BLANK from colorimeter, insert SAMPLE tube into chamber, close lid and select SCAN SAMPLE. Record result. 9. Press to turn colorimeter off or press to exit to a previous menu EXIT or make another menu selection. COD3 Plus Colorimeter 3.11 DISSOLVED OXYGEN .800.561.8187 information@itm.com www. .com...
  • Page 110 DISSOLVED OXYGEN COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 111 *WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
  • Page 112 0.1 mg/L Iron (Fe 10 mg/L Sulfate (SO 200 mg/L –2 Color and turbidity must be removed or compensated for in the procedure. Temperature should be maintained within 5°C of room temperature. FLUORIDE COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 113 10. Insert tube into chamber, close lid and select SCAN SAMPLE. Record result. 11. Press to turn colorimeter off or press to exit to a previous menu EXIT or make another menu selection. COD3 Plus Colorimeter 3.11 FLUORIDE .800.561.8187 information@itm.com www. .com...
  • Page 114 FLUORIDE COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 115 *WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
  • Page 116 This test result is the reagent blank. Subtract the reagent blank from all subsequent test results of unknown samples. It is necessary to determine the reagent blank only when a new lot number of reagents is obtained. HYDRAZINE COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www.
  • Page 117 *WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
  • Page 118 10. Insert tube into chamber, close lid and select SCAN SAMPLE. Record result. 11. Press to turn colorimeter off or press to exit to a previous menu EXIT or make another menu selection. MOLYBDENUM, High Range COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 119 *WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
  • Page 120 Then follow the above procedure to perform the test on a distilled or deionized water sample. This test result is the reagent blank. Subtract the reagent blank from all subsequent test results of unknown samples. NICKEL COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www.
  • Page 121 *WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
  • Page 122 EXIT or make another menu selection. NOTE: HR Reagent must be made fresh each week. If reagent is refrigerated, it may be kept up to 3 weeks. OZONE COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 123 EXIT or make another menu selection. NOTE: HR Reagent must be made fresh each week. If reagent is refrigerated, it may be kept up to 3 weeks. COD3 Plus Colorimeter 3.11 OZONE .800.561.8187 information@itm.com www.
  • Page 124 OZONE COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 125 *WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
  • Page 126 , when used as the preservative, interferes when the chloride levels are low (less than 50 mg/L). This interference is overcome by spiking samples with a minimum of 50 mg/L of sodium chloride. PHOSPHATE, Low Range COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 127 9. At end of 5 minute waiting period, mix, insert tube into chamber, close lid and select SCAN SAMPLE. Record result. 10. Press to turn colorimeter off or press to exit to a previous menu EXIT or make another menu selection. COD3 Plus Colorimeter 3.11 PHOSPHATE, Low Range .800.561.8187 information@itm.com www. .com...
  • Page 128 PHOSPHATE, Low Range COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 129 *WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
  • Page 130 8. After 5 minute waiting period, mix, insert tube into chamber, close lid and select SCAN SAMPLE. Record result. 9. Press to turn colorimeter off or press to exit to a previous menu EXIT or make another menu selection. PHOSPHATE, High Range COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 131 *WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
  • Page 132 It is necessary to determine the reagent blank only when a new lot number of reagents are obtained. For the most accurate results, the sample and reagents should be at 25±4°C. POTASSIUM COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 133 *WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
  • Page 134 The blank value is subtracted from the sample concentrations. SILICA, Low Range COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 135 This test result is the reagent blank. Subtract the reagent blank from all subsequent test results of unknown samples. It is necessary to determine the reagent blank only when a new lot number of reagents are obtained. COD3 Plus Colorimeter 3.11 SILICA, Low Range .800.561.8187 information@itm.com...
  • Page 136 SILICA, Low Range COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 137 *WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
  • Page 138 NOTE: To extend the range to 100 ppm, perform a 2:1 dilution of water sample, with silica-free water. Perform test and multiply result by 2. SILICA, High Range COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www.
  • Page 139 *WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
  • Page 140 A white film is deposited on the inside of test tubes as a result of the sulfate test. Thoroughly clean and rinse test tubes after each test. For the most accurate results, samples and reactions should be at 25±4°C. SULFATE, High Range COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www.
  • Page 141 *WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
  • Page 142 High concentrations of sulfide will inhibit the reaction, but dilution of the sample prior to analysis eliminates this problem. SULFIDE, Low Range COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 143 10. Insert tube into chamber, close lid and select SCAN SAMPLE. Record result. 11. Press to turn colorimeter off or press to exit to a previous menu EXIT or make another menu selection. COD3 Plus Colorimeter 3.11 SULFIDE, Low Range .800.561.8187 information@itm.com www. .com...
  • Page 144 SULFIDE, Low Range COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 145 *WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
  • Page 146 It is necessary to determine the reagent blank only when a new lot number of reagents is obtained. For the most accurate results, the sample and reagents should be at 20 ±2°C. TANNIN COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www.
  • Page 147 0–500 FAU (Formazon Attenuation Units) MDL: 3 FAU METHOD: Absorptimetric, 180° detector SAMPLE HANDLING Measure sample as soon as possible after collection. & PRESERVATION: INTERFERENCES: Check for stray light interference (see page 69). COD3 Plus Colorimeter 3.11 TURBIDITY .800.561.8187 information@itm.com www. .com...
  • Page 148 Dilutions from the stock should be prepared fresh daily. †Alternatively, a prepared concentrated formazin standard of 4000 NTU may be ordered in a 60 mL size by Code 6195-H. TURBIDITY COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 149 *WARNING: Reagents marked with an * are considered to be potential health hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
  • Page 150 INTERFERENCES: The following ions interfere in concentrations greater than those listed. mg/L mg/L Cd(II) Cr(III) Al (III) Ni(II) Mn (II) Co (II) Fe (III) CrO4(II) Fe (II) ZINC, Low Range COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 151 This test result is the reagent blank. Subtract the reagent blank from all subsequent test results of unknown samples. It is necessary to determine the reagent blank only when a new lot number of reagents is obtained. COD3 Plus Colorimeter 3.11 ZINC, Low Range .800.561.8187...
  • Page 152 4.41 7.98 6.28 11.18 8.87 14.97 12.40 Freshwater data from Trussel (1972). Seawater values from Bower and Bidwell (1978). Salinity for Seawater values = 34% at an ionic strength of 0.701m. APPENDIX COD3 Plus Colorimeter 3.11 .800.561.8187 information@itm.com www. .com...
  • Page 153 1. The percentage from the table is 11.18% (or 0.1118). 2. 1 ppm Total Ammonia-Nitrogen x 0.1118 = 0.1118 ppm Unionized Ammonia- Nitrogen. 3. Total Ammonia-Nitrogen 1.0000 ppm Unionized Ammonia-Nitrogen - 0.1118 ppm Ionized Ammonia-Nitrogen 0.8882 ppm COD3 Plus Colorimeter 3.11 APPENDIX .800.561.8187 information@itm.com www. .com...

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