Extech TB400 Portable Turbidity Meter User Manual

Introduction

The Extech TB400 is a portable turbidity meter designed for accurate measurement of turbidity in various aqueous solutions, including water, food, and beverages. Its compact and robust design allows for convenient on-site testing, eliminating the need to transport samples back to a laboratory. This manual provides essential information for the proper setup, operation, and maintenance of your TB400 meter.

Product Features

• Large Big-Digit LCD: Features a clear, easy-to-read liquid crystal display for quick and accurate readings.
• Splash-Proof Front Panel: Designed to withstand splashes, enhancing durability in various testing environments.
• Portable Design: Enables convenient on-site measurements, reducing the need for laboratory transport.
• Wide Measurement Range: Capable of measuring up to 1000 NTU (Nephelometric Turbidity Unit) with a high resolution of 0.01 NTU.
• Microprocessor-Based Circuitry: Ensures high accuracy and repeatable measurement results.
• Small Sample Size: Requires only a 10mL sample for testing, conserving sample material.

Package Contents

Upon opening the hard carrying case, verify that all items listed below are present and in good condition:

• Extech TB400 Portable Turbidity Meter
• 0 NTU Standard Solution Test Bottle
• 100 NTU Standard Solution Test Bottle
• Cleaning Solution (Distilled Water)
• Two (2) Empty Test Bottles with Covers
• Cleaning Cloth
• Six (6) AAA Batteries
• Hard Carrying Case

Image: The Extech TB400 Turbidity Meter shown with its complete set of accessories, including standard solutions, test bottles, cleaning cloth, and the hard carrying case.

Setup

1. Battery Installation

1. Locate the battery compartment on the back of the TB400 meter.
2. Open the battery compartment cover.
3. Insert six (6) AAA batteries, ensuring correct polarity as indicated inside the compartment.
4. Close the battery compartment cover securely.

2. Initial Calibration

For accurate measurements, it is crucial to perform an initial calibration using the provided standard solutions.

1. Ensure the meter is clean and dry.
2. Power on the meter by pressing the POWER button.
3. Follow the on-screen prompts or refer to the "Calibration" section in the Operating Instructions for detailed steps using the 0 NTU and 100 NTU standard solutions.

Operating Instructions

Image: Front view of the Extech TB400 Turbidity Meter, showing the large LCD display and control buttons.

1. Powering On/Off

• To power on the meter, press the orange POWER button located below the display.
• To power off the meter, press and hold the orange POWER button until the display turns off.

2. Taking a Measurement

1. Prepare your sample: Fill a clean test bottle with 10mL of the solution to be measured. Ensure the bottle is free of air bubbles and external contaminants.
2. Insert the sample: Place the filled test bottle into the meter's sample compartment, ensuring it is seated correctly.
3. Initiate measurement: Press the TEST/CAL button to begin the measurement cycle. The display will show the turbidity reading in NTU.
4. Record reading: Note the displayed value.

3. Understanding NTU Readings

NTU stands for Nephelometric Turbidity Unit, which is a measure of the clarity of a fluid. Higher NTU values indicate greater turbidity (more suspended particles), while lower values indicate clearer fluid.

4. Using Control Buttons

• HOLD: Freezes the current reading on the display. Press again to release.
• REC: Activates data recording mode.
• MAX/MIN: Displays the maximum or minimum recorded turbidity value.
• ZERO: Used to zero the meter, typically with a 0 NTU standard solution, to ensure baseline accuracy.
• TEST/CAL: Initiates a measurement or enters calibration mode, depending on the current meter state.

Maintenance

1. Cleaning the Meter and Test Bottles

• Meter Exterior: Wipe the meter's exterior with a soft, damp cloth. Do not use abrasive cleaners or solvents.
• Test Bottles: After each use, rinse test bottles thoroughly with distilled water (cleaning solution provided) and dry them with the cleaning cloth. Ensure no residue remains, as this can affect future readings.

2. Storage

When not in use, store the Extech TB400 meter and its accessories in the provided hard carrying case. Store in a cool, dry place away from direct sunlight and extreme temperatures.

3. Battery Replacement

If the low battery indicator appears on the display, replace all six AAA batteries promptly to ensure continued accurate operation. Refer to the "Battery Installation" section under Setup for instructions.

Troubleshooting

This section addresses common issues you might encounter with your Extech TB400 Turbidity Meter. For more detailed troubleshooting or issues not listed here, please refer to the comprehensive user manual available on the Extech website or contact customer support.

Specifications

Warranty and Support

Warranty Information

The Extech TB400 Portable Turbidity Meter comes with a 1-year limited warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims.

Customer Support

For technical assistance, troubleshooting, or warranty service, please contact Extech Instruments customer support. Visit the official Extech website for contact details and additional resources.

You can find more information and support at the Extech Store on Amazon.