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EUTECH INSTRUMENTS TN-100 Instruction Manual Portable turbidimeter Hide thumbs Also See for TN-100:

• Manuel d'instructions (29 pages)
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• Instruction manual (28 pages)

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• Contents
• Table of Contents
• Troubleshooting
• FAQs
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Table of Contents

• Table of Contents

• 1 Overview

  • Unpacking TN-100/ T-100 Meter and Accessories
  • Display
  • Keys and Functions
  • Battery Installation

• 2 Turbidity Calibration

  • Calibration Standards
  • Indexing
  • Calibration Procedure
  • Measurement Mode
  • Restoring Factory Calibration

• 3 Turbidity Measurement

  • General Information
  • Turbidity Measurement Procedure
  • Measurement Procedure
  • Single-Shot or Continuous Measurement

• 4 Troubleshooting Guide

• 5 Routine Maintenance

  • Vials - Handling, Cleaning and Care

• 6 Accessories

• 7 Specifications

• 8 Addendum 1: Turbidity

  • Definition
  • Why Is It Important
  • Measurement Principle
  • Nephelometric Turbidity Units (NTU)
  • Indexing a Vial

• 9 Addendum 2: Guide to Good Measurement Technique

  • Maintain Sample Vials in Good Condition
  • Match Sample Vials
  • Degassing
  • Timeliness of Sample
  • Other Important Sampling Techniques
  • Calibration
  • Dilution

• 10 Warranty

  • Return of Items

Quick Links

• 1 Turbidity Calibration
• 2 Calibration Standards
• 3 Calibration Procedure
• 4 Restoring Factory Calibration
• 5 Troubleshooting Guide
• 6 Specifications
• Frequently Asked Questions (17)
• Download this manual

Instruction Manual TN-100/T-100 Portable Turbidimeter Technology Made Easy ... 68X357701 Rev. 4 Apr 06 Table of Contents Previous Page Next Page

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Table of Contents

Frequently Asked Questions (17)

• How do I calibrate the EUTECH INSTRUMENTS TN-100 for accurate readings?

  To calibrate the TN-100 for accurate readings, follow these steps:

  • Place the TN-100/T-100 turbidimeter on a flat and level surface.
  • Insert the CAL 1 standard (800 NTU) into the sample well, aligning the mark on the vial with the mark on the meter.
  • Press down the vial until it snaps fully into the instrument.
  • Cover the vial using the light shield cap.
  • Press the ON/OFF key to switch on the meter. The meter will go to measurement mode after the power-up sequence.
  • Select the calibration function by pressing the CAL key once. The "CAL" annunciator will blink, and the meter will prompt for the first calibration standard "CAL 1 800 NTU".
  • Press the READ/ENTER key.
  • The "CAL 1 800 NTU" annunciator will blink for about 12 seconds while the instrument performs calibration. Once completed, it will prompt you to insert the next calibration standard, "CAL 2 100 NTU".
  • Repeat the calibration for CAL 2, CAL 3, and CAL 4 calibration standards.
  • After successfully calibrating the CAL 4 standard (0.02 NTU), the display will show "STbY".
  • The meter is now ready for measurement.
  For more information, see pages 12 and 13 of the manual. Read more Was this helpful? Yes No
• How do I troubleshoot inconsistent or inaccurate readings from my TN-100?

  Inconsistent or inaccurate readings from your TN-100 can be caused by several factors, and troubleshooting involves addressing these potential issues:

  • Error Messages: If an error message appears on the display, refer to the troubleshooting guide for specific corrective actions. For example:
    • ERR 1, 2, 3, 4 (Calibration Error): Ensure you are using the correct NTU calibration standard for the indicated point.
    • ERR 5, 6, 7 (General Calibration Failure): Re-do calibration with all four standards provided.
    • ERR 8 (Excessive stray light detected): Ensure the vial is fully snapped in the sample well. If this error occurs during measurement, it means stray light exceeding 0.02 NTU was detected, and the measurement is aborted. Ensure the vial sits properly and press READ/ENTER to re-do the measurement.
    • Low battery indication: Replace batteries.
  • Vial Condition and Handling:
    • Ensure sample vials are meticulously clean and free from scratches, fingerprints, and water droplets, as these can cause stray light interference and inaccurate readings.
    • Handle sample vials only by the top or cap to avoid fingerprints or smudges.
    • Apply a thin film of silicone oil to the outside of the vial to mask imperfections and then wipe off excess with a lint-free cloth.
    • Store cleaned and dried vials with black caps on.
  • Sample Preparation:
    • Degas samples to remove air or trapped gases, as bubbles can cause measurement errors.
    • Measure samples immediately to prevent changes in particle characteristics due to temperature and settling.
    • Avoid violently shaking or agitating samples, as this can break apart particles or entrap air. Gentle agitation is advisable.
    • Ensure samples are at the same temperature as the process flow to prevent precipitation of soluble compounds.
  • Instrument Operation:
    • Always use a sample vial; never pour liquid directly into the sample well.
    • Never attempt to clean the sample well, as the optics may be damaged.
    • Place the meter on a flat and level surface during operation; do not hold it in your hands, as this may lead to inaccurate readings.
    • Ensure the light shield cap is used to cover the vial during measurements to shield off stray light.
  For more information, see pages 12, 16, 18, 19, 21, 22, 27 and 28 of the manual. Read more Was this helpful? Yes No
• What is the correct procedure for taking a turbidity measurement with the TN-100?

  To take a turbidity measurement with the TN-100, follow these steps:

  • Place the TN-100/T-100 turbidimeter on a flat and level surface.
  • Place the sample vial inside the sample well and align the vial's index mark with the meter's index mark.
  • Push the vial until it is fully snapped in.
  • Cover the vial with the light shield cap.
  • Turn on the meter by pressing the ON/OFF key.
  • After the power-up sequence, the meter will go to measurement mode, and the display will blink "--Rd--" for about 10 times.
  • The measured reading will then appear on the display.
  • If necessary, for subsequent samples, place the next sample vial into the sample well, ensuring to align the vial's mark with the meter's index mark.
  • Press the READ/ENTER key. The display will blink "--Rd--" for several times, and the measured reading will appear.
  • Repeat these steps for all your samples.
  For more information, see pages 18 and 19 of the manual. Read more Was this helpful? Yes No
• What do common error messages on the EUTECH TN-100 display indicate?

  The TN-100/T-100 turbidimeter performs self-diagnostics and generates messages to provide diagnostic information. Common error messages and their indications include:

  • ERR 1: The meter is unable to recognize the 800 NTU Calibration Standard.
  • ERR 2: The meter is unable to recognize the 100 NTU Calibration Standard.
  • ERR 3: The meter is unable to recognize the 20.0 NTU Calibration Standard.
  • ERR 4: The meter is unable to recognize the 0.02 NTU Calibration Standard.
  • ERR 5: There is not sufficient signal to achieve the appropriate resolution in the 0-1000NTU range.
  • ERR 6: There is not sufficient signal to achieve the appropriate resolution in the 0-100NTU range.
  • ERR 7: There is not sufficient signal to achieve the appropriate resolution in the 0-20 NTU range.
  • ERR 8: Excessive stray light detected during measurement.
  • ERR 9: Lamp Failure.
  • ERR 9 (Or): Turbidity value is above the measurement range (>1000NTU).
  • Battery Icon: Low battery indication, meaning the batteries need to be replaced.
  For more information, see page 21 of the manual. Read more Was this helpful? Yes No
• What are the key technical specifications of the EUTECH INSTRUMENTS TN-100?

  The key technical specifications of the EUTECH INSTRUMENTS TN-100 are:

  • 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 – 19.99 NTU), 0.1 NTU (20 – 99.9 NTU), 1 NTU (100 – 1000 NTU)
  • Accuracy: ±2% of reading ± 1 LSD for 0 to 500 NTU; ±3% of reading ± 1 LSD for 501 to 1000 NTU
  • Repeatability: ± 0.01 NTU or ± 1% of reading, whichever is greater with gel samples
  • Response Time: < 6 seconds for full step change
  • Calibration Standards: 0.02 NTU; 20 NTU; 100 NTU; 800 NTU
  • Standardization: EPA-approved polymer-based primary standards
  • Light Source: Infrared-emitting diode (850 nm wavelength)
  • Light Source Life: > 1,000,000 tests
  • Detector: Silicon photovoltaic
  • Stray Light: < 0.02 NTU
  • Display: 4-digit 14-segments customized liquid crystal display with annunciators
  • Sample Cells (Vials): Borosilicate glass with screw caps, fill line and indexing mark. 51 (H) x 25 (Dia) mm (2 x 1 in)
  • Sample Volume Required: 10 ml (0.33 oz)
  • Operating Temperature Range: 0°C to 50°C (32°F to 122°F)
  • Sample Temperature Range: 0°C to 50°C (32°F to 122°F)
  • Operating Humidity Range: 0-90% RH, non-condensing at 30°C (86°F)
  • Power Supply: 4 x "AAA" Alkaline Batteries
  • Battery Life: > 1200 readings
  • Enclosure Type & Rating: ABS Plastic / IP67 rated
  • Insulation Rating: Pollution Degree 2
  • Weight: Meter: 200 g (7 oz); Meter with case: 1.25 kg (2.75 lb)
  • Dimensions: Meter: 6.8 (W) x 15.5 (L) x 4.6 (H) cm (2.7 x 6.1 x 1.8 in); Meter with Case: 16 (W) x 35 (L) x 12 (H) cm (6.3 x 13.8 x 4.7 in)
  For more information, see page 24 of the manual. Read more Was this helpful? Yes No
• What is the recommended cleaning procedure for the EUTECH TN-100's sample cell and optics?

  For the sample vials (cells), the recommended cleaning procedure is:

  • Wash the interior and exterior of the vial in a detergent solution.
  • Rinse thoroughly 8 to 10 times with clean distilled water to eliminate detergent buildup and streaking.
  • Vials can also be acid washed periodically and coated with a special silicone oil to fill small scratches and mask glass imperfections. After applying oil, remove excess with a lint-free cloth to achieve a dry surface with imperfections filled.
  • Always handle sample vials from the top or by the cap to avoid fingerprints or smudges.
  • After filling and capping, wipe the outside surface with a clean, lint-free absorbent cloth until dry.
  • Cleaned and dried vials should be stored with the black caps on.

  It is important to note that you should NEVER attempt to clean the sample well of the instrument, as the optics may be damaged.

  Read more Was this helpful? Yes No
• How often should the EUTECH TN-100 turbidimeter be recalibrated?

  Re-calibration of the instrument is recommended at least once every month for optimum accuracy.

  Was this helpful? Yes No
• What types of samples can the EUTECH TN-100 effectively measure?

  The EUTECH TN-100/T-100 turbidimeter is designed to measure the turbidity of an aqueous sample in the field.

  For more information, see pages 7 and 16 of the manual. Read more Was this helpful? Yes No
• Does the EUTECH TN-100 require specific calibration standards, and which ones are recommended?

  Yes, the EUTECH TN-100 requires specific calibration standards. The recommended standards for achieving accuracy are:

  • CAL 1: 800 NTU Calibration Standard
  • CAL 2: 100 NTU Calibration Standard
  • CAL 3: 20.0 NTU Calibration Standard
  • CAL 4: 0.02 NTU Calibration Standard

  These standards are typically provided as a Calibration Set.

  Read more Was this helpful? Yes No
• How do I perform a factory reset on the EUTECH TN-100?

  To perform a factory reset on the EUTECH TN-100 and restore default calibration values, follow these steps:

  • With the meter switched off, press and hold the Up Arrow key.
  • Switch on the meter using ON/OFF. Release the Up Arrow key when "URST” (User-Reset) appears in the display.
  • The display will show “URST" for about 2 seconds and then show “No”.
  • Use the Up or Down Arrow key to select “YES” to restore factory calibration values.
  • Press the READ/ENTER key to confirm your selection. The meter will perform the reset if "YES" is selected.
  • The display will flash "--Rd--" about 10 times, indicating that the meter is going to measurement mode.
  For more information, see pages 14 and 15 of the manual. Read more Was this helpful? Yes No
• Is the EUTECH TN-100 designed for portable use in the field?

  Yes, the TN-100/T-100 is a waterproof portable turbidimeter designed to measure turbidity of an aqueous sample in the field.

  Was this helpful? Yes No
• How long does the battery typically last on the EUTECH TN-100?

  The battery life for the EUTECH TN-100 is typically > 1200 readings.

  Was this helpful? Yes No
• How do I prepare samples to ensure accurate turbidity measurements with the TN-100?

  To ensure accurate turbidity measurements, prepare samples by:

  • Vial Preparation:
    • Obtain a clean and dry sample vial.
    • Handle the sample vial by the top to avoid contamination.
    • Rinse the vial with approximately 10 ml of the sample water, cap, invert several times, discard, and repeat the rinsing two more times.
    • Fill the rinsed vial with the remaining portion (approx. 10 ml) of the grab sample up to the mark indicated.
    • Wipe the vial with the supplied soft, lint-free cloth to ensure it is dry, clean, and free from smudges.
    • Apply a thin film of silicone oil to the sample vial and wipe with a soft cloth for even distribution to fill small scratches and mask imperfections.
  • Sample Handling and Degassing:
    • Degas air or other trapped gases from the sample before measurement. Common methods include adding a surfactant, applying a partial vacuum, or using an ultrasonic bath.
    • Measure samples immediately to prevent changes in particle characteristics due to temperature and settling.
    • Avoid violently shaking or agitating samples, as this can break particles or entrap air. Gentle agitation is advisable.
    • Ensure samples are at the same temperature as the process flow to prevent precipitation.
    • Perform a visual observation of the sample vial before each measurement to ensure no visible bubbles and that the vial is clean and free of scratches.
  • Vial Indexing (Optional but Recommended):
    • Although not required for high-quality vials, for better accuracy, you can index vials.
    • To index, slowly rotate the vial throughout one complete revolution while observing the display to find the position that provides the lowest turbidity reading. Mark this position on the vial (not the cap) against the mark on the meter.
    • Always place the vial in the sample well in the indexed position after indexing.
  For more information, see pages 11, 17, 26, 27 and 28 of the manual. Read more Was this helpful? Yes No
• What is the detection limit of the EUTECH INSTRUMENTS TN-100?

  The EUTECH INSTRUMENTS TN-100 has a measurement range starting from 0 NTU with a resolution of 0.01 NTU for readings between 0 and 19.99 NTU. The lowest calibration standard provided is 0.02 NTU.

  For more information, see page 24 of the manual. Read more Was this helpful? Yes No
• What maintenance schedule is recommended for the EUTECH TN-100?

  For the EUTECH TN-100, re-calibration is recommended at least once every month for optimum accuracy. Additionally, proper measurement requires the use of vials that are free of marks, smudges, scratches, and bacterial growth, necessitating careful handling and cleaning of the sample vials.

  Read more Was this helpful? Yes No
• What is the measurement principle behind the EUTECH INSTRUMENTS TN-100?

  The EUTECH INSTRUMENTS TN-100 operates on the nephelometric principle of turbidity measurement. This involves using a light source and a detector to monitor the light scattered at 90° with respect to the incident beam. The instrument is designed to meet the criteria specified in ISO 7027 and DIN 27027 standards.

  For more information, see pages 7, 25 and 26 of the manual. Read more Was this helpful? Yes No
• What are the optimal environmental conditions for operating the EUTECH TN-100?

  The optimal environmental conditions for operating the EUTECH TN-100 are:

  • Operating Temperature Range: 0°C to 50°C (32°F to 122°F)
  • Operating Humidity Range: 0-90% RH, non-condensing at 30°C (86°F)
  For more information, see page 24 of the manual. Read more Was this helpful? Yes No

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Summary of Contents for EUTECH INSTRUMENTS TN-100

• 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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