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GENERAL OPERATING INFORMATION



OVERVIEW

The 2020we/wi is a portable, microprocessor controlled, direct reading

nephelometer. Turbidity is measured directly by either EPA Method 180.1

or ISO Method 7027. It has a graphical liquid crystal display and six

button keypad. These allow the user to select options from the menu

driven software, to directly read test results or to review stored results of

previous tests in the data logger. The menus can be displayed in seven

different languages.
The 2020we/wi uses a state of the art, multi-detector optical

confi guration that assures long term stability of calibrations, high

precision and accuracy and low detection limits. All readings are

determined by sophisticated digital signal processing algorithms,

minimizing fl uctuations in readings and enabling rapid, repeatable

measurements. The microprocessor and optics enable a dynamic range

and auto-ranging over several ranges. Energy effi cient LED light sources

are used for ISO turbidity. EPA turbidity uses a tungsten fi lament light

source that meets or exceeds EPA specifi cations and is designed for a

uniform light spot image and stable output.
A USB wall adapter, USB computer connection or lithium battery powers

the 2020we/wi.
A USB port on the back of the meter allows an interface of the meter

with a Windows-based computer for real-time data acquisition and

data storage using a PC. The 2020we/wi may be interfaced with any

Windows-based computer by using the LaMotte SMARTLink 3 Program.
GENERAL OPERATING INFORMATION

The operation of the 2020we/wi 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 2020we/wi to perform, such as, scan

blank and scan sample. The keypad is used to make menu selections

that are viewed on the display.

Содержание 2020we

Страница 1: ...2020we wi 1970 EPA 1970 ISO...

Страница 2: ......

Страница 3: ...t is Turbidity 13 How is Turbidity Measured 13 Turbidity Units 15 Taking Turbidity Water Samples 16 Sample Dilution Techniques 17 OPTIONS SETUP Factory Default Settings 17 Averaging 18 Turbidity Optio...

Страница 4: ...erview 51 The Keypad 52 The Display and Menus 52 Negative Results 54 Tubes and Chambers 54 MAINTENANCE Cleaning 55 Repairs 55 Meter Disposal 56 4 Refer to the Quick Start Guide for simplified Calibrat...

Страница 5: ...ater from wet tubes from entering the meter chamber NEVER PUT WET TUBES IN THE METER SAFETY PRECAUTIONS Read the label on all reagent containers Some labels include precautionary notices and first aid...

Страница 6: ...9 NTU FNU Range 1 NTU FNU 110 4000 NTU FNU Range Accuracy From 0 2 5 NTU FNU the accuracy is 0 05 NTU FNU From 2 5 100 NTU FNU the accuracy is 2 Above 100 NTU FNU the accuracy is 3 Detection Limit 0...

Страница 7: ...e analyte 1 Note that As Dr William Horwitz once stated In almost all cases when dealing with a limit of detection or limit of determination the primary purpose of determining that limit is to stay aw...

Страница 8: ...independent of matrix glassware and other sample handling sources of error It is the detection limit for the optical system of the meter 1 CFR 40 part 136 appendix B 2 Statistics in Analytical Chemis...

Страница 9: ...Standard 60 mL 1451 1454 Water Sample Bottle 60 mL 0688 0688 Tubes 6 Cable USB 3 ft 1720 1720 USB Wall Adapter 1721 1721 Accessories Code Description 1452 100 NTU Standard 60 mL EPA 1455 100 FNU Stand...

Страница 10: ...2 years from the date of shipment If it should become necessary to return the instrument for service during or beyond the warranty period contact our Technical Service Department at 1 800 344 3100 fo...

Страница 11: ...outlet Reinsert the USB port plug after charging To charge the battery from a computer plug the smaller end of the USB cable USB mini B connector into the meter and the larger end of the USB cable USB...

Страница 12: ...he lithium ion battery used in this unit should last for many years with normal use When it no longer powers the unit long enough to meet testing requirements it will need to be replaced Lithium ion b...

Страница 13: ...oridium There is presently consideration to lower this to 0 1 NTU The trend has been to check the calibration of on line turbidimeters with hand held field units The optical design and low detection l...

Страница 14: ...ISO method are formazin nephelometric units FNU The 2020we meets the EPA specification and the 2020wi meets the ISO specification The nephelometric method is most useful for low turbidity The 2020we w...

Страница 15: ...e light that is attenuated by high turbidity samples they may continue to report the results as NTU Recently there has been an effort to use the units of turbidity measurements to indicate which type...

Страница 16: ...than 60 nm 180 detection 2020wi ISO 7027 ASBC American Society of Brewing Chemists 2020we wi Not applicable EBC European Brewery Convention 2020we wi Not applicable The 2020we and 2020wi each use two...

Страница 17: ...L 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 t...

Страница 18: ...iefly hold to turn the meter on The LaMotte logo screen will appear for about 3 seconds and the Main Menu will appear Main Menu Measure Data Logging Options Run PC Link 12 00 00 001 500 2 Press to scr...

Страница 19: ...Press ENTER to save the selection The screen will display Storing for about 1 second and return to the Options Menu Options Menu Averaging Turbidity Options Set Clock Set PWR Save 12 00 00 001 500 NOT...

Страница 20: ...ds and the Main Menu will appear Main Menu Measure Data Logging Options Run PC Link 12 00 00 001 500 2 Press to scroll to Options Main Menu Measure Data Logging Options Run PC Link 12 00 00 001 500 3...

Страница 21: ...easurements will be made with the 180 detector only as indicated by AU attenuation units or FAU formazin anttenuation units on the display AU and FAU are numberically equivalent to NTU See page 15 for...

Страница 22: ...Main Menu Measure Data Logging Options Run PC Link 12 00 00 001 500 3 Press ENTER to select Options Press to scroll to Turbidity Options Options Menu Averaging Turbidity Options Set Options Set PWR Sa...

Страница 23: ...mazin Japan Standard 12 00 00 001 500 NOTE Stablcal standards below 50 NTU should not be used to calibrate the 2020we wi The diluent has a different refractive index than traditional formazin standard...

Страница 24: ...00 3 Press ENTER to select Options Press to scroll to Set Clock Options Menu Averaging Turbidity Options Set Clock Set PWR Save 12 00 00 001 500 4 Press ENTER to select Set Clock The date is displayed...

Страница 25: ...ER to select the final character The time and date will be saved and the screen will return to the Options Menu Options Menu Averaging Turbidity Options Set Clock Set PWR Save 12 00 00 001 500 25 Opti...

Страница 26: ...l appear for about 3 seconds and the Main Menu will appear Main Menu Measure Data Logging Options Run PC Link 12 00 00 001 500 2 Press to scroll to Options Main Menu Measure Data Logging Options Run P...

Страница 27: ...o scroll to desired setting Auto Shutoff Disable 5 Minutes 15 Minutes 30 Minutes 12 00 00 001 500 7 Press ENTER to save the selection The screen will display Storing for about 1 second and return to t...

Страница 28: ...measurements to avoid interference from stray light NOTE The backlight feature uses a significant amount of power The longer the backlight is on the more frequently the battery will have to be charged...

Страница 29: ...rol 10 Seconds 20 Seconds 30 Seconds 12 00 00 001 500 6 Press or to scroll to desired setting Backlight Time Button Control 10 Seconds 20 Seconds 30 Seconds 12 00 00 001 500 7 Press ENTER to save the...

Страница 30: ...ging Options Run PC Link 12 00 00 001 500 2 Press to scroll to Options Main Menu Measure Data Logging Options Run PC Link 12 00 00 001 500 3 Press ENTER to select Options Options Menu Averaging Turbid...

Страница 31: ...d return to the Options Menu To retain the current user level calibration settings press EXIT to abort the Factory Reset Options Menu Done Enter Continue 12 00 00 001 500 7 Press ENTER to return to th...

Страница 32: ...Options Run PC Link 12 00 00 001 500 2 Press to scroll to Options Main Menu Measure Data Logging Options Run PC Link 12 00 00 001 500 3 Press ENTER to select Options Options Menu Averaging Turbidity...

Страница 33: ...to the Options Menu Options Menu Set PWR Save aging Set Backlight Time Factory Reset Select Language 12 00 00 001 500 NOTE If the meter unintentionally switches to another language use the procedure...

Страница 34: ...ter on The LaMotte logo screen will appear for about 3 seconds and the Main Menu will appear Main Menu Measure Data Logging Options Run PC Link 12 00 00 001 500 2 Press to scroll to Data Logging Main...

Страница 35: ...01 500 6 Press EXIT to return to the Logging menu Press or to scroll to disable the logging options or erase the log Press ENTER to select the option The screen will display Storing for about 1 second...

Страница 36: ...e used in the following examples For the most accurate results a user calibration should be performed The Japan Standard calibration mode as indicated by J in the Menu bar should be used only with Jap...

Страница 37: ...mended that the meter be calibrated daily 1 Press and briefly hold to turn the meter on The LaMotte logo screen will appear for about 3 seconds and the Main Menu will appear Main Menu Measure Data Log...

Страница 38: ...e most accurate results use the same tube for the blank and the sample l 6 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 tu...

Страница 39: ...lean tube 0290 or the same tube three times with the standard l 11 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...

Страница 40: ...nt dark background with light characters will appear to indicate that the reading can be adjusted Turbidity WB F 0 99 NTU Scan Sample Calibrate 12 00 00 001 500 17 Press or to scroll to the concentrat...

Страница 41: ...three times removing the tube from the chamber after each scan and reinserting the tube in the chamber with the same orientation The readings should be consistent Use the last consistent reading to c...

Страница 42: ...the sample l 5 Fill the tube to the fill line with the sample Pour the sample down the inside of the tube to avoid creating bubbles Cap the tube 6 Wipe the tube thoroughly with a lint free cloth 7 Ope...

Страница 43: ...ep is not as critical for samples above 10 NTU The meter should always be blanked before reading samples below 10 NTU 1 Press and briefly hold to turn the meter on The LaMotte logo screen will appear...

Страница 44: ...d below 1 NTU the meter should be blanked with a 0 NTU Primary Standard or prepared turbidity free 0 1 NTU water For the most accurate results use the same tube for the blank and the sample l 6 Fill t...

Страница 45: ...Done for about 1 second and then return to the Turbidity With Blank menu Turbidity WB F Scan Blank Scan Sample 12 00 00 001 500 10 Rinse a clean tube 0290 or the same tube three times with the sample...

Страница 46: ...when diluted Turbidity Free Water The definition of low turbidity and turbidity free water has changed as filter technology has changed and nephelometric instruments have become more sensitive At one...

Страница 47: ...ng at least two syringes full of deionized water through the filtering apparatus to remove foreign matter The first and second rinses should be discarded Turbidity free water as prepared with the foll...

Страница 48: ...ace the filter and fill the syringe with approximately 50 mL of deionized water Filter the water into the storage container and save this turbidity free water 6 Repeat Step 5 until the desired amount...

Страница 49: ...ow concentrations use the same tube for the blank and the sample 15 Always insert tube into the meter chamber with the same amount of pressure and to the same depth 16 Occasionally clean the chamber w...

Страница 50: ...tside of acceptable range Dilute sample and test again Error1 High readings with 90 and 180 detectors Dilute sample by at least 50 and retest Lost in meter menus Reset to factory default settings Foll...

Страница 51: ...le measurements The microprocessor and optics enable a dynamic range and auto ranging over several ranges Energy efficient LED light sources are used for ISO turbidity EPA turbidity uses a tungsten fi...

Страница 52: ...ader displays the title of the current menu The footer line displays the time and the date the data logger status and the battery status The menu selection window is in the middle of the display betwe...

Страница 53: ...t results or error messages or the LaMotte logo is displayed The top two lines of the display are used to display information in a large easy to read format The menus work in the same way as previousl...

Страница 54: ...n indicate that the sample was at or near the detection limit This is a normal variation that results in a negative reading A large negative reading however is not normal and indicates a problem Some...

Страница 55: ...ty in results Slight variations in wall thickness and the diameter of the tubes may lead to slight variations in the test results To eliminate this error the tubes should be placed in the chamber with...

Страница 56: ...hazardous to health and the environment To avoid harm to the environment and natural resources the use of appropriate take back systems is recommended The crossed out wheeled bin symbol on the meter...

Страница 57: ...57...

Страница 58: ...58...

Страница 59: ...59...

Страница 60: ...802 Washington Ave Chestertown Maryland 21620 USA 410 778 3100 800 344 3100 www lamotte com 1970 MN 02 01 12...

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