EUTECH INSTRUMENTS WATERPROOF TN100 TURBIDIMETER Instruction Manual
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EUTECH INSTRUMENTS WATERPROOF TN100 TURBIDIMETER Instruction Manual

Portable turbidimeter
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Instruction Manual
TN-100/ T-100
Portable Turbidimeter
68X357701
Technology Made Easy ...
Rev. 1 10/03

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Summary of Contents for EUTECH INSTRUMENTS WATERPROOF TN100 TURBIDIMETER

  • Page 1 Instruction Manual TN-100/ T-100 Portable Turbidimeter 68X357701 Technology Made Easy ... Rev. 1 10/03...
  • Page 2 The information presented in this manual is subject to change without notice as improvements are made, and does not represent a commitment on the part of 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 our products without notice.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS OVERVIEW ..................1 Unpacking TN-100/ T-100 Meter and Accessories Display Keys and Functions Battery Installation TURBIDITY CALIBRATION .............. 5 Calibration Standards Indexing Calibration Procedure Restoring Factory Calibration TURBIDITY MEASUREMENT............10 General Information Turbidity Measurement Procedure 3.2.1 Preparation of Sample Vial 3.2.2 Measurement Procedure Single-Shot or Continuous Measurement TROUBLESHOOTING GUIDE ............

  • Page 4: 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 5: 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 6: Keys And Functions

    Instruction Manual TN-100/ T-100 Keys and Functions The keypad has five keys: ON/OFF, CAL, ▲, ▼, and READ/ENTER. Keys Functions Powers on and shuts off the meter. With the auto switch-off feature ON/OFF the meter automatically shuts off 20 minutes after last key press. Initiates the calibration mode of the meter.

  • Page 7: Battery Installation

    Instruction Manual TN-100/ T-100 Battery Installation Four AAA-sized batteries are included in your meter’s packaging: 1. Use a Philips screwdriver to remove the two screws holding the battery cover. See Figure 3. 2. Remove the battery cover. 3. Insert the batteries. Follow the diagram inside the cover for correct polarity.

  • Page 8: 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 9: Calibration Procedure

    Instruction Manual TN-100/ T-100 Calibration Procedure 1. Place TN-100/ T-100 turbidimeter on a flat and level surface. 2. Select the calibration function of the instrument by pressing the CAL button once. The [CAL] annunciator will blink momentarily and the meter will prompt for the first calibration standard CAL 1 standard (800 NTU).
  • Page 10 Instruction Manual TN-100/ T-100 CAL 3 Place the next CAL 3 standard into the Flashes about CAL 3 sample well 5 times 20.0 NTU CAL 1 READ ENTER CAL 3 CAL 1 800 NTU Flashes about 10 times or more Place the CAL 1 standard into the CAL 4...

  • Page 11: 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 12 Instruction Manual TN-100/ T-100 METER OFF Press ON/OFF keys simultaneously and hold for 2 seconds before releasing Press key to DOWN select To retain last To restore factory READ READ calibration values calibration ENTER without retrieving ENTER factory calibration. [-Rd-] will flash 10 times The meter is now ready for measurement Figure 5: Restoring Factory Calibration...

  • Page 13: 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.

  • Page 14: Preparation Of Sample Vial

    Instruction Manual TN-100/ T-100 3.2.1 Preparation of Sample Vial 1. Grab liquid with the plastic bottle provided. 2. Obtain a clean and dry sample vial (Figure 7). 3. Take care to handle the sample vial by the top. 4. 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 15: Measurement Procedure

    Instruction Manual TN-100/ T-100 3.2.2 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 mark with the meter’s index mark. See below. Light shield cap for covering the vial during Align index mark on measurements...

  • Page 16: Single-Shot Or Continuous Measurement

    Instruction Manual TN-100/ T-100 NOTE: 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.
  • Page 17 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.

  • Page 18: 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 19: 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 20: Accessories

    35635-50 (includes 800, 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 your nearest distributor or Eutech Instruments/ Oakton Instruments.

  • Page 21: Specifications

    Instruction Manual TN-100/ T-100 7 SPECIFICATIONS MODEL NO. TN-100/ T-100 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 Resolution 0.01 NTU (0 –...

  • Page 22: 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.

  • Page 23: 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 24: 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 colour sensitivity of the photocell.

  • Page 25: Timeliness Of Sample

    Instruction Manual TN-100/ T-100 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 26: 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 27: 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 28 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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