e/i 2020e • Code 1979-EPA 2020i • Code 1979-ISO Version 1.
WARNING! This set contains chemicals that may be harmful if misused. Read cautions on individual containers carefully.
CONTENTS Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Turbidity . . . . . . . . . . . . . What is Turbidity? . . . . . . How is Turbidity Measured?. . Taking Turbidity Water Samples Sample Dilution Techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 . 6 . 7 .
Computer Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Battery Operation . . . . . . . . . . . . . . . . . . . . . . . . 37 Replacing the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Meter Disposal . . . . . . . . . . . . . . . . . . . . . . .
INTRODUCTION TURBIDITY What is Turbidity? Turbidity is an aggregate property of the solution, water in most cases. Turbidity is not specific to the types of particles in the water. They could be suspended or colloidal matter and they can be inorganic, organic or biological. At high concentrations turbidity is perceived as cloudiness or haze or an absence of clarity in the water. Turbidity is an optical property that results when light passing through a liquid sample is scattered.
compared with the intensity passing through a turbidity-free sample at 180° from the light source. This method is good for highly turbid samples. The most common instrument for measuring scatter light in a water sample is a nephelometer. A nephelometer measures light scattered at 90° to the light beam. Light scattered at other angles may also be measured, but the 90° angle defines a nephelometric measurement.
All dilutions are based on a final volume of 10 mL so several dilutions will require small volumes of the water sample. Graduated pipets should be used for all dilutions. If volumetric glassware is not available, dilutions can be made with the colorimeter tube. Fill the tube to the 10 mL line with the sample and then transfer it to another container. Add 10 mL volumes of deionized water to the container and mix. Transfer 10 mL of the diluted sample to the colorimeter tube and follow the test procedure.
2. Scroll down and then press *IOK to select Options. 3. Scroll down and then press *IOK to select Turbidity. 4. Press the *IOK to select Units. 5. Scroll down and then press *IOK to select units.
SELECTING A TURBIDITY CALIBRATION CURVE 1. Press ON to turn the meter on. 1.3 2. Scroll down and then press *IOK to select Options. 3. Scroll down and then press *IOK to select Turbidity. 4. Scroll down and then press *IOK to select Calibration. Main Menu Measure Data Logging * Options 16:02:19 01/04/05 Options Averaging * Turbidity Date/Time Language 16:02:19 01/04/05 Turbidity Units * Calibration 16:02:19 5. Scroll down and then press *IOK to select a Calibration curve.
The Japan Standard calibration mode should be used only with Japanese Polystyrene Standards (0–100 NTU). Note: StablCal® standards below 50 NTU should not be used to calibrate the 2020. The diluent has a different refractive index than traditional formazin standards and will affect the results. 6. Press to exit to a previous menu or make another menu selection or press OFF to turn the meter off. AVERAGING The averaging option allows the user to average multiple readings.
4. Scroll down and then press *IOK to select an averaging option. Available options are: Disabled, 2 Measurements, 5 Measurements, 10 Measurements. Note: The * is displayed next to the current setting. Averaging Disabled * 2 Measurements 5 Measurements 10 Measurements 16:02:19 01/04/05 5. Press to exit to a previous menu or make another menu selection or press OFF to turn the meter off. Note: When the Averaging option is selected, it will take longer to get the final result and more power will be used.
4. Press *IOK to select Set Date or scroll down and then press *IOK to select Set Time or Date Format. Date/Time * Set Date Set Time Date Format 16:02:19 5. When setting the time or the date, use the or to change the highlighted number on the display. Press *IOK to accept the value and move to the next value.
SELECTING A LANGUAGE The default setting is English. To change the setting: 1. Press ON to turn the meter on. 1.3 2. Scroll down and then press *IOK to select Options. 3. Scroll down and then press *IOK to select Language. 4. Scroll down and then press *IOK to select a language. Available languages are: English, French, Spanish, Japanese (Kana), Portuguese, Italian.
SETTING AUTO SHUTDOWN The power saving Auto Shutdown feature will turn the meter off when a button has not been pushed for a set amount of time. The default setting is disabled. To change the setting: 1. Press ON to turn the meter on. 1.3 2. Scroll down and then press *IOK to select Options. 3. Scroll down and then press *IOK to select Auto Shutdown. 4. Scroll up and then press *IOK to select a shutdown time. Available options are: 5 minutes, 10 minutes, 30 minutes, Disabled.
DATA LOGGING The default setting for the data logger is start (on). The meter will log the last 4004 data points. 1. Press ON to turn the meter on. 1.3 2. Scroll down and press *IOK to select Data Logging. Main Menu Measure * Data Logging Options 16:02:19 3. Press *IOK to view the last data point that was logged. Data Logging * View Stop Erase 16:02:19 4. Press or to scroll through the saved data points. 01/04/05 01/04/05 304 / 304 1.
Data Logging View * Start Erase 16:02:19 Or scroll down and press *IOK to select Erase to empty all logged data points from the memory. 01/04/05 Data Logging View Stop * Erase 5. Press OFF to turn the meter off or press to exit to a previous menu or make another menu selection.
TUBE POSITIONING RING The Tube Positioning Ring To put a ring on a tube, remove the cap from the tube. The tube positioning ring has two tapered notches and one squared-off notch. Place the ring on the tube with the squared-off notch closest to the top of the tube and tapered notches closer to the bottom of the tube. Align the single, squared-off notch with the vertical, white indexing line that is printed on the tube.
ANALYSIS 1. Press *ION to turn the meter on. 1.3 2. Press *IOK to select Measure. Main Menu * Measure Data Logging Options 16:02:19 01/04/05 3. Rinse a clean tube (0290) three times with the blank. For the most accurate results, use the same tube for the blank and the sample. 4. Fill the tube to the fill line with the blank. Pour the blank down the inside of the tube to avoid creating bubbles. 5. Dry the tube with a lint-free cloth. Put on a dry positioning ring. Cap the tube.
6. Open the meter lid. Insert the tube into the chamber. Align the index notch on the positioning ring with the index arrow on the meter. Close the lid. 7. Press *IOK to select Scan Blank. Remove the tube. NOTE: For the best accuracy, especially at low turbidity, see Tip 17 on page 29. Turbidity (F) * Scan Blank 16:02:19 q 01/04/05 8. Rinse a clean tube (0290), or the same tube, three times with the water to be tested. Avoid spilling water on the outside of the tube.
10. Cap the tube. Wipe the tube thoroughly again with a lint-free cloth. 11. Open the meter lid. Insert the tube into the chamber. Align the index notch on the positioning ring with the index arrow on the meter. Close the lid. 12. Press *IOK to select Scan Sample. Turbidity (F) * Scan Sample 16:02:19 13. Record the result. Turbidity 0 . 54 q 01/04/05 (F) NTU * Scan Sample 16:02:19 q 01/04/05 14. Press OFF to turn the meter off or press to exit to a previous menu or make another menu selection.
Dilution Procedures If a sample is encountered that is more than 4000 NTU, a careful dilution with 0 NTU or very low turbidity water will bring the sample into an acceptable range. However, there is no guarantee that halving the concentration will exactly halve the NTU value. Particulates often react in an unpredictable manner when diluted.
2. Pour approximately 50 mL of deionized water into the barrel of the syringe. Insert the plunger. Exert pressure on the plunger to slowly force the water through the filter. Collect water in the clean storage container. Rinse walls of the container then discard this rinse water. 3. Remove the filter from the syringe. Remove the plunger from the barrel. (This step is required to prevent rupturing the filter by the vacuum that would be created when the plunger is removed.) 4.
Turbidity Standards Only use AMCO or formazin standards with the 2020. StablCalâ standards below 50 NTU should not be used to calibrate the 2020. The diluent used in StablCalâ standards has a different refractive index than traditional formazin standards and will affect the results. The concentration of the calibration standard should be similar to the expected concentration of samples that will be tested.
4. Fill the tube to the fill line with the blank. Pour the blank down the inside of the tube to avoid creating bubbles. Cap the tube. 5. Dry the tube with a lint-free cloth. Put on a dry positioning ring. Cap the tube. Wipe the tube thoroughly again with a lint-free cloth. 6. Open the meter lid. Insert the tube into the chamber. Align the index notch on the positioning ring with the index arrow on the meter. Close the lid. 7. Press *IOK to select Scan Blank. Remove the tube.
8. Rinse a clean tube (0290), or the same tube, three times with the standard. Avoid spilling standard on the outside of the tube. IMPORTANT: While the tube is inverted, wipe the lip of the tube to remove droplets of liquid that may be present. This will prevent liquid from being trapped under the ring when the tube is returned to an upright position. 9. Fill the tube to the fill line with the standard. Pour the standard down the inside of the tube to avoid creating bubbles. Cap the tube. 10.
12. Press *IOK to select Scan Sample. Turbidity (F) * Scan Sample 16:02:19 13. Observe the result. Turbidity (F) 0 . 54 NTU * Scan Sample 16:02:19 14. Press and then press *IOK to select Calibrate. Turbidity q 01/04/05 (F) 0 . 54 NTU * Calibrate 16:02:19 15. Use the or to change the highlighted digits on the display to match the concentration of the turbidity standard. Press *IOK to accept a digit and move to the next digit. 01/04/05 q 01/04/05 Calibrate 00.
Calibrate 0 0 . 50 q, Q, p 16:02:19 16. When the value on the display matches the concentration of the turbidity standard, press the *IOK to select Set. 01/04/05 Calibrate 0 0 . 50 q 01/04/05 * Set 16:02:19 Or press press *IOK to return the meter to the default setting. Calibrate 0 1 . 15 * Default 16:02:19 p 01/04/05 17. Press *IOK to proceed to Turbidity analysis. Press OFF to turn the meter off or press to exit to a previous menu or make another menu selection.
Testing Tips 1. Samples should be collected in a clean glass or polyethylene container. 2. Samples should be analyzed as soon as possible after collection. 3. Gently mix sample by inverting before taking a reading but avoid introducing air bubbles. 4. For the most precise results, follow the recommended procedure for wiping a filled tube before placing it in the meter chamber. Invert tube very slowly and gently three times to mix the sample. Surround the tube with a clean, lint-free cloth.
TROUBLESHOOTING GUIDE Error Messages Err1 Very Low battery. Replace battery or switch to AC power. Press back arrow ( ) to back out. Scan sample again. Replace battery as soon as possible. Err2 The meter can not be calibrated outside of the allowable range of the displayed reading. Confirm that standard was made correctly. The displayed reading can only be adjusted to ±50% of the factory calibration. Err3 Meter can not be calibrated with a zero sample. Calibrate the meter with a sample other than zero.
Meter freezes Lid was opened when reading was being taken. Close lid. Read again. Unplug adapter. Plug adapter in to reset. Stray Light The accuracy of readings on the 2020 should not be affected by stray light. Make sure that the sample compartment lid is always fully closed when taking readings. GENERAL OPERATING INFORMATION Overview The 2020 is a portable, microprocessor controlled, direct reading nephelometer. Turbidity is measured directly by either EPA Method 180.1 or ISO Method 7027.
Top View L Mott Bottom View Serial Number 2020 OK OFF ON Battery Compartment 32 GENERAL OPERATING INFORMATION
General Operating Information The operation of the 2020 is controlled by the menu driven software and user interface. A menu is a list of choices. This allows a selection of various tasks for the 2020 to perform, such as, scan blank and scan sample. The keypad is used to make menu selections that are viewed on the display. The Keypad This button will scroll down through a list of menu selections.
The Display & Menus The display allows menu selections to be viewed and selected. These selections instruct the 2020 to perform specific tasks. The menus are viewed in the display using two general formats that are followed from one menu to the next. Each menu is a list of choices or selections. The display has a header line at the top and a footer line at the bottom. The header displays the title of the current menu. The footer line displays the time and the date.
Header Message or Result Window Menu Selection Window Footer Menu Title M e s s ag e or Result * First Choice 16:02:19 Second Choice another and so on ~ 01/04/05 As described previously, the button allows an exit or escape from the current menu and a return to the previous menu. This allows a rapid exit from an inner menu to the main menu by repeatedly pushing the button. Pushing OFF at any time will turn the 2020 off. The display may show the following messages: Err1 to Err7 Error messages.
Tubes The 2020 uses one type of tube (Code 0290) for the turbidity test. There is no need for a special turbidity tube. The handling of the tubes is of utmost importance. Tubes must be clean and free from lint, fingerprints, dried spills and significant scratches, especially the central zone between the bottom and the sample line. Scratches, fingerprints and water droplets on the tube can cause stray light interference leading to inaccurate results when measuring turbidity.
PC LINK The 2020 may be interfaced with any Windows-based computer by using the LaMotte SMARTLink 2 Program and Interface Cable (Code 1912-3 with 3.5 inch disk or Code 1912-CD with compact disk). The program will store test information and results in a database. The meter may also be interfaced with an RS232 serial printer, using an interface cable (Code 1772) and setting the printer configuration to the Output as described below.
MAINTENANCE Cleaning Clean meter with a damp, lint-free cloth. DO NOT ALLOW WATER TO ENTER THE METER CHAMBER OR ANY OTHER PARTS OF THE METER. Clean meter chamber and lenses over LEDs with a lint-free cloth slightly dampened with alcohol. Repairs Should it be necessary to return the meter for repair or servicing, pack the meter carefully in a suitable container with adequate packing material.
GENERAL INFORMATION Packaging and Delivery Experienced packaging personnel at LaMotte Company assure adequate protection against normal hazards encountered in transportation of shipments. After the product leaves LaMotte Company, all responsibility for safe delivery is assured by the transportation company. Damage claims must be filed immediately with the transportation company to receive compensation for damaged goods.
Specifications - 2020e and 2020i Instrument Type: Standard: Nephelometer EPA 180.1, 2020e ISO7027, 2020i Units of Measure NTU (Nephelometric Turbidity Units) 0-2000 FNU (Formazin Nephelometric Units) 0-2000 & Range: ASBC (American Society of Brewing Chemists) 0-3500 EBC (European Brewery Convention) 0-500 FAU (Formazin Attenuation Unit) 40-4000 Resolution: (display) 0.01 NTU, 0–10.99 NTU Range 0.1 NTU, 11–109.99 NTU Range 1 NTU, 110–4000 NTU Range Accuracy: ±0.
Statistical and Technical Definitions Related to Product Specifications Method Detection Limit (MDL): “The method detection limit (MDL) is defined as the minimum concentration of a substance that can be measured and reported with 99% confidence that the analyte concentration is greater than zero and is determined from analysis of a sample in a given matrix containing the analyte.”1 Note that, “As Dr.
Contents and Accessories 2020e Kit EPA Version Code 1979-EPA CONTENTS Code 0 NTU Standard, 60 mL 1480 1 NTU Standard, 60 mL 1484 10 NTU Standard, 60 mL 1485 Water Sample Bottle, 60 mL 0688 Tubes, 4 (Two with tube positioning rings) — Battery, 9V — ACCESSORIES 1486 100 NTU Standard, 60 mL (EPA) 1483 100 NTU Standard, 60 mL (ISO) 0475 Tubes, Code 0290, Set of 6 0641 Tube Positioning Ring, Pack of 2 4185 Turbidity-Free Water Kit 2-2097 Filters, 0.
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