Table of Contents
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Table of Contents
Related Manuals for LaMotte 2020
Summary of Contents for LaMotte 2020
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Page 2: Table Of Contents
Replacing the Lamp ......24 Repairs to the 2020 ......24... -
Page 3: General Information
24 hours a day from the Poison Control Center listed in the front of the phone book. Be prepared to supply the name and four digit LaMotte code number found on the container label or at the top of the MSDS. LaMotte reagents are registered with POISONDEX, a computerized poison control information system available to all local poison control centers. -
Page 4: Specifications
SPECIFICATIONS Instrument Type Nephelometric turbidity, calibrated in NTU Range: 0.00 -1100 NTU Accuracy: .05 or ±2% for readings below 100 NTU, whichever is greater ±3% above 100 NTU Resolution: Standard Mode 0.01 from 0.00 -10.99 NTU 0.1 from 11.0 -109.9 NTU 1 from 110 -1100 NTU EPA Mode Reported to the nearest NTU... -
Page 5: Parts & Accessories
PARTS & ACCESSORIES Included in the Model 2020 Turbidity Meter Kit (Code 1799 OR 1799-EX2): Code Item 26856 2020 Turbidity Meter 1726-110 AC Adapter, 9V (or 1726-220 with 1799-EX2) 1476 AMCO 2020 Turbidity Standard, 1.0 NTU, 60 mL 1477 AMCO... -
Page 6: Ce Compliance
CE COMPLIANCE The 2020 Turbidimeter has been independently tested and has earned the European CE Mark of compliance for electromagnetic compatibility and safety. -
Page 7: What Is Turbidity
WHAT IS TURBIDITY? Turbidity, cloudiness in water, can be interpreted as an absence of clarity or brilliance. It is caused by suspended and colloidal matter such as clay, silt, organic and inorganic matter and microscopic organisms. Turbidity should not be confused with color since a darkly colored water can still be clear and not turbid. -
Page 8: How Is Turbidity Measured
HOW IS TURBIDITY MEASURED? Light passing through clear water will travel in a straight line. Particles in turbid water will cause the light to scatter giving it a “cloudy” appearance. The turbidity of a sample is determined by measuring the amount of scatter when a light is passed through a sample. - Page 9 Turbidimeters are the preferred method. Nephelometers, such as the 2020, are turbidimeters that measure the scattered light at 90 degrees from the light source. A reference beam passes through the sample and is measured at 180 degrees. The ratio of these two readings is...
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Page 10: General Operating Information Overview
The light is detected by a silicon photo diode. The 2020 is supplied with a 9 volt alkaline battery and an AC power adapter. A RS-232 serial port on the back of the meter allows an interface of the turbidimeter with an IBM compatible computer for real time data acquisition and data storage using the PC. -
Page 12: The Keypad
THE KEYPAD... -
Page 13: Turbidity Tubes
Variability in the geometry and quality of the glassware is the predominate cause of variability in results. The special anti-reflective area on the 2020 tubes allows more accurate turbidity readings for low NTU samples. Only 2020 tubes should be used with the 2020 turbidimeter. - Page 14 The 2020 turbidity tubes are optically selected but very small variations in the tubes may cause different readings on the same sample in low turbidity water. If greater accuracy is required, such as for Drinking Water requirements, the tubes supplied with the 2020 should be individually calibrated. This procedure is important for reading below 10 NTU but is probably not needed for samples above 10 NTU.
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Page 15: Calibration Standard Solutions
CALIBRATION STANDARD SOLUTIONS The 2020 has been pre-calibrated in the range of 0 to 1100 NTU with AMCO primary standards manufactured by Advanced Polymer Systems, Inc. This allows the 2020 to be used for treated water, natural water or wastewater. Recalibration of the 2020 by the user is not required. -
Page 16: Calibration Procedure
CALIBRATION PROCEDURE... -
Page 17: Selecting The Epa Mode
EPA mode. The meter can only be switched from one mode to the other while turning the 2020 on, from the OFF state. The 2020 will remain in which ever mode it was last used, even if the meter has been turned OFF. -
Page 18: Turbidity Measurement
TURBIDITY MEASUREMENT... -
Page 19: Preparation Of Turbidity-Free Water
PREPARATION OF TURBIDITY FREE WATER An accessory package (Code 1800, not included) is available for preparing turbidity free water for dilution of high turbidity samples. The preparation of turbidity free water requires careful technique. Introduction of any foreign matter will affect the turbidity reading. A filtering device with a special membrane filter is used to prepare turbidity-free water. - Page 20 PROCEDURE: Periodically examine the membrane filter to insure that no holes or cracks are present. Depending on the nature of the unfiltered water, it is possible to prepare a liter or more of turbidity-free water using a single filter. The membrane filter may be stored in the holder indefinitely and used as required.
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Page 21: Dilution Procedures
DILUTION PROCEDURES If a sample is encountered that is higher than 1100 NTU, a careful dilution will bring the sample into the acceptable range. However, there is no guarantee that halving the concentration will exactly halve the NTU values. The particulates often react in an unpredictable manner when diluted. -
Page 22: Troubleshooting Guide
Meter won’t turn on Battery Replace AC Adapter Plug in AC Wall Outlet Verify power source Contact LaMotte for Return to LaMotte for Return Authorization repair Suspect Calibration Check calibration with Use new standards standards Verify standards with Run alternate test with... -
Page 23: Rs232 Port
RS232 PORT The 2020 Turbidimeter may be interfaced with any IBM compatible computer using an Interface cable (Code 1772). The meter may also be interfaced with an RS-232 serial printer, using an appropriate cable and setting the printer configuration to the output below. -
Page 24: Replacing The Battery
4. Close the battery compartment lid REPLACING THE LAMP The tungsten lamp included with the model 2020 has a life of approximately 800 hours. If the display becomes unstable when using LaMotte AMCO standards, call LaMotte Company for a return authorization number to have the lamp... - Page 25 5.17.99 • 61799...