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- Page 1 Instruction Manual TN-100/T-100 Portable Turbidimeter 99 Washington Street Melrose, MA 02176 Phone 781-665-1400 Toll Free 1-800-517-8431 Visit us at www.TestEquipmentDepot.com Technology Made Easy ... 68X357701 Rev. 4 Apr 06...
- Page 5 Eutech Instruments Pte Ltd/ Oakton Instruments. Note: Eutech Instruments Pte Ltd/ Oakton Instruments reserves the right to make improvements in design, construction, and appearance of products without notice.
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Page 6: Table Of Contents
Table of Contents 1. Overview ....................1 Unpacking TN-100/ T-100 Meter and Accessories ..........1 Display ........................2 Keys and Functions ....................3 Battery Installation ....................4 2. Turbidity Calibration ................5 Calibration Standards ................... 5 Indexing ........................ 5 Calibration Procedure................... 6 Restoring Factory Calibration ................ -
Page 7: Overview
Instruction Manual TN-100/ T-100 1. Overview Thank you for selecting the waterproof portable TN-100/ T-100 turbidimeter. The TN-100/ T-100 allows you to measure turbidity of an aqueous sample in the field. This instrument operates on the nephelometric principle of turbidity measurement and is designed to meet the criteria specified in ISO 7027 and DIN 27027 standards (see Measurement Principle on page 19). -
Page 8: Display
Instruction Manual TN-100/ T-100 Sample Vial Sample Well Index Mark Liquid Crystal Display Keypad Figure 1: Parts of TN-100/T-100 Turbidimeter Display All the LCD segments and annunciators that can appear on the display are shown in Figure 2. The display is used for reporting the turbidity reading and to provide guidance for the operation of the instrument. -
Page 9: Keys And Functions
Instruction Manual TN-100/ T-100 Keys and Functions The keypad has five keys: ON/OFF, CAL, ▲, ▼, and READ/ENTER. Functions Powers on and shuts off the meter. With the auto switch-off feature the meter automatically shuts off 20 minutes after last key press. Initiates the calibration mode of the meter. -
Page 10: Battery Installation
Instruction Manual TN-100/ T-100 Battery Installation Four AAA-sized batteries are included in the packaging: 1. Use a Philips screwdriver to remove the two screws holding the battery cover. See Figure 4. 2. Remove the battery cover. 3. Insert the batteries. Follow the diagram inside the cover for correct polarity. 4. -
Page 11: Turbidity Calibration
Instruction Manual TN-100/ T-100 2. Turbidity Calibration The TN-100/ T-100 turbidimeter was calibrated and tested prior to leaving the factory. Therefore, it is possible to use the instrument directly out of the box. However, re-calibration of the instrument is recommended to help you become familiar with the operation of the instrument and the calibration procedures. -
Page 12: Calibration Procedure
Instruction Manual TN-100/ T-100 Calibration Procedure 1. Place TN-100/ T-100 turbidimeter on a flat and level surface. 2. Insert the CAL 1 standard (800 NTU) into the sample well, aligning the mark on vial with mark meter. Figure 10 on page 12. 3. - Page 13 Instruction Manual TN-100/ T-100 Measurement Mode CAL 3 CAL 3 Place the CAL 3 standard into the 20.0 NTU Flashes about 5 times sample well READ CAL 1 ENTER CAL 3 Flashes about 10 times CAL 1 Place the CAL 1 standard into the 800 NTU sample well...
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Page 14: Restoring Factory Calibration
Instruction Manual TN-100/ T-100 Restoring Factory Calibration The TN-100/ T-100 turbidimeter allows you to reset the meter back to the factory default calibration values. This feature is extremely useful when there are errors in calibration or when you have new calibration standards. 1. - Page 15 Instruction Manual TN-100/ T-100 Instrument Off Press & hold key and switch on the meter using ON/OFF Release key when you see ‘URST’ in the display Press key to select Select No and then Select YES and then press READ/ENTER press READ/ENTER READ...
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Page 16: Turbidity Measurement
Instruction Manual TN-100/ T-100 3. Turbidity Measurement General Information The waterproof TN-100/ T-100 turbidimeter allows you to measure the turbidity of a grab sample. The turbidity is reported in Nephelometric Turbidity Units (NTU). Readings above 1000 NTU are outside the range of this instrument. NOTE: Before switching on the TN-100/ T-100 turbidimeter, a sample vial MUST be placed in the sample well. - Page 17 Instruction Manual TN-100/ T-100 Preparation of Sample Vial 1. Obtain a clean and dry sample vial 2. Take care to handle the sample vial by the top. 3. Rinse the vial with approximately 10 ml of the sample water, capping the vial with the black screw cap and gently inverting it several times.
- Page 18 Instruction Manual TN-100/ T-100 Measurement Procedure 1. Place TN-100/ T-100 turbidimeter on a flat and level surface. 2. Place the sample vial inside the sample well and align the vial’s index mark with the meter’s index mark. See Figure 10. Light shield cap for covering the vial during Align index mark on...
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Page 19: Single-Shot Or Continuous Measurement
Instruction Manual TN-100/ T-100 NOTES: 1. NEVER pour liquid directly into the sample well of the instrument. Always use a vial. The instrument will only accurately measure the turbidity of a sample when vials sealed with the black caps are used. The black cap serves as both seal and a light shield. - Page 20 Instruction Manual TN-100/ T-100 For Continuous Measurement: 1. Make sure the meter is sitting on a flat and level surface and is in measurement mode. The display shows the last measured value or “STbY” 2. Place the sample vial in the sample well. 3.
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Page 21: Troubleshooting Guide
* If an error message appears, take the appropriate corrective action and re-do the desired procedure. If the problem persists, contact Eutech Instruments or your dealer. See Sections on Warranty and Return of Items on page 24. -
Page 22: Routine Maintenance
Instruction Manual TN-100/ T-100 5. Routine Maintenance The supplied carrying case is optimal for protecting the instrument. If you do not plan on leaving the instrument in the supplied carrying case, when not in use, ensure that the instrument has been turned off and that a clean sample vial fitted with a black cap has been placed in the sample well. -
Page 23: Accessories
Calibration Set for normal operation (includes 800, ECTN100CALKT 35635-50 100, 20.0 & 0.02 NTU Standards) Sample Vials – pack of 3 vials ECTN100CUVKT 35653-55 Silicone Oil – 10ml ECSILICONEOIL To order any accessory or replacement part, please contact the nearest distributor or Eutech Instruments/ Oakton Instruments. -
Page 24: Specifications
Instruction Manual TN-100/ T-100 7. Specifications Parameter Specification Measurement Method ISO 7027 compliant nephelometric method (90°) Measurement Range 0 to 1000 NTU Automatic Range Selection 0.01 – 19.99 NTU 20.0 – 99.9 NTU 100 – 1000 NTU 0.01 NTU (0 – 19.99 NTU) Resolution 0.1 NTU (20 –... -
Page 25: Addendum 1: Turbidity
Instruction Manual TN-100/ T-100 8. Addendum 1: Turbidity Definition Turbidity is defined as an “expression of the optical property that causes light to be scattered and absorbed rather than transmitted in straight lines through the sample.” That is, turbidity is the measure of relative sample clarity, not colour. Water with cloudy or opaque appearance will have high turbidity, while water that is clear or translucent will have low turbidity. -
Page 26: Nephelometric Turbidity Units (Ntu)
Instruction Manual TN-100/ T-100 Figure 14 shows the waterproof TN-100/ T-100 turbidimeter basic optical system. It includes a light source and a detector to monitor the light scattered at 90° with respect to the incident beam. Scattered Light 90° Transmitted Lamp Light Lens... -
Page 27: Addendum 2: Guide To Good Measurement Technique
Instruction Manual TN-100/ T-100 9. Addendum 2: Guide to Good Measurement Technique Turbidity is a very complex analytical measurement which can be affected by many factors. Some are inherent in the instrument’s design such as angle of detection, light beam aperture, incident beam wavelength and color sensitivity of the photocell. However, there are other factors such as stray light, air bubbles and care of vial, which can be prevented through proper care of equipment and accessories, and in the operating procedure for measurement. -
Page 28: Degassing
Instruction Manual TN-100/ T-100 Degassing Air or other trapped gases should be removed before measurement. Degassing is recommended even if no bubbles are visible. There are three methods commonly used for degassing: Addition of a surfactant: This involves adding a surfactant to the water samples to lower the surface tension of the water, thereby releasing trapped gasses. -
Page 29: Calibration
Instruction Manual TN-100/ T-100 Calibration 1. Do not open the vials with calibration standards. 2. Check that the standards have not expired. 3. Make sure the calibration vials are free of dust, smudges and scratches before use. 4. Conduct the calibration in the same manner each time. Variations in how calibration is performed could yield inaccurate measurements. -
Page 30: Warranty
If repair or adjustment is necessary and has not been the result of abuse or misuse within the designated period, please return – freight pre-paid – and correction will be made without charge. Eutech Instruments/ Oakton Instruments will determine if the product problem is due to deviations or customer misuse. - Page 32 For more information on Eutech Instruments/ Oakton Instruments’ products, contact your nearest distributor or visit our website listed below: 99 Washington Street Melrose, MA 02176 Phone 781-665-1400 Toll Free 1-800-517-8431 Visit us at www.TestEquipmentDepot.com...
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