EUTECH INSTRUMENTS TN-100 Instruction Manual
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EUTECH INSTRUMENTS TN-100 Instruction Manual

Portable turbidimeter
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Instruction Manual
TN-100/T-100
Portable Turbidimeter
Technology Made Easy ...
68X357701 Rev. 4 Apr 06

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  • Page 1 Instruction Manual TN-100/T-100 Portable Turbidimeter Technology Made Easy ... 68X357701 Rev. 4 Apr 06...
  • Page 5 Preface This manual functions in two ways: first as a step by step guide to help you operate the waterproof TN-100/ T-100 turbidimeter; second, it serves as a handy reference guide. It contains basic instructions that you must follow during the operation, care and maintenance of the instrument.

  • 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

    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

    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.

  • 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.

  • Page 11: Turbidity Calibration

    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.

  • Page 13: Measurement Mode

    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...

  • Page 14: Restoring Factory Calibration

    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.
  • 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...

  • Page 16: Turbidity Measurement

    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.
  • 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: Measurement Procedure

    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.

  • Page 19: Single-Shot Or Continuous Measurement

    Single-Shot or Continuous Measurement You can use TN-100/ T-100 turbidimeter to take a single reading or perform continuous measurement. The latter is only used for indexing the vials. See Section 8.5 - Indexing a Vial on page 20 for more information.
  • 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.

  • Page 21: Troubleshooting Guide

    Instruction Manual TN-100/ T-100 4. Troubleshooting Guide The TN-100/ T-100 turbidimeter routinely performs self-diagnostics, and will automatically generate messages to provide you with specific diagnostic information. These messages are for your use and do not indicate a reduction in the performance of the instrument or a failure of any component in the instrument, unless otherwise stated in this list.

  • 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

    Instruments Instruments Item Description Order Code Order Code Waterproof TN-100/ T-100 portable turbidimeter EC-TN100 35635-00 with set of 4 calibration standards (800, 100, 20.0 & 0.02 NTU), set of 3 sample vials, lint-free cloth, silicone oil, batteries – all in a rugged carrying case.

  • 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

    (3) Measuring angle; (4) Aperture angle in water sample; (5) Distance traversed by incident light and scattered light within the sample; (6) Calibration standard. The TN-100/ T-100 turbidimeter follows the ISO 7027 standard whose specification allows for greater reproducibility of the measured values and greater agreement between other measuring instruments.

  • 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...

  • 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.

  • 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

    Instruction Manual TN-100/ T-100 10. Warranty The TN-100/ T-100 meter is supplied with a 2-year warranty from manufacturing defects and calibration standards for 6 months. If repair or adjustment is necessary and has not been the result of abuse or misuse within the designated period, please return –...
  • Page 32 For more information on Eutech Instruments/ Oakton Instruments’ products, contact your nearest distributor or visit our website listed below: Oakton Instruments Eutech Instruments Pte Ltd Distributed by: P.O Box 5136, Blk 55, Ayer Rajah Crescent, Vernon Hills, IL60061, USA #04-16/24 Singapore 139949...

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