Ueomul 3-in-1 pH/TDS/Temperature Water Quality Tester Instruction Manual

1. Introduction

Thank you for choosing the Ueomul 3-in-1 Water Quality Tester. This device is designed to accurately measure pH, Total Dissolved Solids (TDS), and temperature of various liquid samples. Its high precision, automatic temperature compensation (ATC), and waterproof design make it ideal for a wide range of applications, including aquariums, swimming pools, hydroponics, and drinking water analysis.

Please read this manual carefully before operating the device to ensure correct usage and optimal performance.

Image 1.1: Ueomul 3-in-1 Water Quality Tester and pH buffer powders.

2. Safety Information

• Keep the device out of reach of children.
• Do not disassemble or modify the device.
• Avoid exposing the device to extreme temperatures or direct sunlight for prolonged periods.
• Ensure the battery compartment is properly sealed to maintain IP67 waterproof rating.
• Handle pH buffer powders with care and avoid ingestion.

3. Product Overview

The Ueomul 3-in-1 Water Quality Tester features an ergonomic design, a clear LCD display, and intuitive controls for easy operation.

Image 3.1: Labeled diagram of the tester's components, including LCD display, ON/OFF button, Hold/TEMP button, Mode/CAL button, probe, and replaceable probe design. It also highlights the IP67 waterproof rating and the use of LR44 1.5V batteries.

Key Features:

• 3-in-1 Functionality: Measures pH, TDS (ppm), and Temperature.
• High Precision: Equipped with a high-precision algorithmic chip and sensitive electrode for fast and accurate readings.
• Automatic Temperature Compensation (ATC): Ensures accurate readings across a wide temperature range (0℃ to 60℃).
• Automatic Calibration: Supports 3-point pH calibration (pH 4.00, pH 6.86, pH 9.18).
• IP67 Waterproof: Provides protection against dust ingress and temporary immersion in water.
• Backlit LCD Display: Green backlight for clear readability in various lighting conditions.
• Data Hold Function: Locks the measurement reading for easy recording.
• Replaceable Probe: Allows for easy maintenance and extended device lifespan.

Image 3.2: Detailed view of the tester's internal components, highlighting replaceable LR44 batteries, IP67 waterproof body, corrosion-resistant TDS probe, and highly calibrated sensitive glass electrodes. It also mentions the intelligent chip and automatic power-off after 5 minutes of inactivity.

4. Setup

4.1 Battery Installation

1. Unscrew the battery cap at the top of the device.
2. Insert three LR44 1.5V button cell batteries, ensuring correct polarity.
3. Securely screw the battery cap back on to maintain the waterproof seal.

4.2 Initial Preparation

1. Remove the protective cap from the bottom of the probe.
2. Rinse the electrode with distilled water and gently blot dry with a clean tissue. Do not rub.
3. The device is factory calibrated, but re-calibration is recommended for first use or after prolonged storage.

5. Operating Instructions

5.1 Power On/Off

• Press the ON/OFF button to turn the tester on.
• Press the ON/OFF button again to turn the tester off. The device also features automatic power-off after 5 minutes of inactivity.

5.2 Taking Measurements (pH, TDS, Temperature)

1. Turn on the tester.
2. Immerse the electrode into the sample solution, ensuring the liquid level is below the cap.
3. Gently stir the solution and wait for the reading to stabilize (usually a few seconds).
4. The display will show the pH/TDS value and temperature simultaneously.

Image 5.1: The tester displaying dual data for pH, TDS, and Temperature, along with their respective measuring ranges, resolutions, and accuracies. For example, pH range is 0-14.00 pH with 0.01 pH resolution, and TDS range is 1-9999 ppm with 1 ppm resolution.

5.3 Switching Modes (pH/TDS)

• Press the MODE/CAL button to switch between pH and TDS measurement modes. The active mode will be indicated on the display.

5.4 Data Hold Function

• While taking a measurement, press the HOLD/TEMP button to lock the current reading on the display.
• Press the HOLD/TEMP button again to release the hold and resume live measurement.

5.5 Temperature Unit Switching (℃/℉)

• Long press the HOLD/TEMP button to switch the temperature unit between Celsius (℃) and Fahrenheit (℉).

6. Calibration

Regular calibration ensures the accuracy of your pH measurements. The tester supports 3-point automatic calibration.

6.1 pH Calibration Procedure

1. Prepare three buffer solutions: pH 4.00, pH 6.86, and pH 9.18. Ensure the buffer powders are dissolved in 250ml of distilled water each.
2. Turn on the tester and switch to pH mode.
3. Rinse the electrode with distilled water and immerse it into the pH 6.86 buffer solution.
4. Long press the MODE/CAL button for 6 seconds until the display shows "CAL" and starts flashing. Release the button.
5. The tester will automatically recognize the buffer solution and calibrate. Wait for the reading to stabilize and stop flashing.
6. Rinse the electrode with distilled water.
7. Repeat steps 3-5 for pH 4.00 buffer solution.
8. Rinse the electrode with distilled water.
9. Repeat steps 3-5 for pH 9.18 buffer solution.
10. After successful calibration, the tester will automatically exit calibration mode.

Image 6.1: Visual guide for the three-point pH calibration process using pH 4.00, pH 6.86, and pH 9.18 buffer solutions. It shows the tester immersed in each solution and the display indicating successful calibration.

Note: If the tester cannot identify the buffer solution, ensure the buffer solution is correct and the electrode is clean. Re-calibration may be needed if the device has been unused for a long time or after frequent use.

7. Maintenance

7.1 Cleaning the Electrode

• After each use, rinse the electrode thoroughly with distilled water to remove any residue.
• Gently blot dry with a clean, soft tissue. Do not wipe or rub the electrode, as this can damage the sensitive glass bulb.

7.2 Storage

• Always replace the protective cap after use to keep the electrode moist. If the electrode dries out, soak it in pH 4.00 buffer solution for 30 minutes before use.
• Store the tester in a cool, dry place, away from direct sunlight and extreme temperatures.

7.3 Probe Replacement

• If the probe becomes damaged or its performance degrades significantly, it can be replaced.
• Unscrew the bottom part of the tester to detach the old probe.
• Attach a new, compatible probe and screw it securely into place.
• After replacing the probe, re-calibrate the device.

8. Troubleshooting

9. Specifications

10. Warranty Information

Ueomul products are manufactured to high-quality standards. For specific warranty terms and conditions, please refer to the warranty card included with your purchase or contact customer support. This warranty typically covers defects in materials and workmanship under normal use.

11. Customer Support

If you have any questions, concerns, or require technical assistance with your Ueomul 3-in-1 Water Quality Tester, please contact our customer support team through the retailer's platform or the contact information provided on the product packaging.

For more information about Ueomul and our commitment to water quality, please visit our official website (if available).