VIVOSUN Digital pH and TDS Meter Kits Instruction Manual

Introduction

This manual provides detailed instructions for the VIVOSUN Digital pH and TDS Meter Kits. These meters are designed for accurate measurement of pH levels, Total Dissolved Solids (TDS), Electrical Conductivity (EC), and temperature in various water sources. Please read this manual thoroughly before use to ensure proper operation and maintenance.

What's in the Box

• VIVOSUN Digital pH Meter
• VIVOSUN Digital TDS/EC/Temperature Meter
• pH Buffer Powder Packs (for calibration)
• Batteries (pre-installed or included)
• User Manual

Product Features

• High Accuracy pH Tester: Measures pH levels from 0.00 to 14.00 with ±0.1 pH accuracy. Features one-touch automatic calibration with included buffer powder packs.
• 3-In-1 TDS Tester: Accurately measures TDS (total dissolved solids), EC (electrical conductivity), and temperature (°C/°F switchable). Measuring ranges: 0-9999 ppm TDS, 0-9999 µS/cm EC, 0.1-80°C / 32-176°F Temp.
• Precision Measurement with ATC: Equipped with ultra-sensitive electrodes, both testers provide rapid, reliable results. Automatic Temperature Compensation (ATC) adjusts for water temperature variations for accurate readings.
• User-Friendly Features: Large backlit LCD screens ensure clear readability. Unique hold function locks readings for easy recording. Memory function preserves settings after power interruptions.
• Multiple Applications: Ideal for monitoring drinking water, swimming pools, spas, RO systems, hydroponics systems, aquariums, and more.

Setup

Battery Installation

The meters typically come with batteries pre-installed. If not, or if replacement is needed, gently slide open the battery compartment cover on the back of the meter. Insert the specified button cell batteries, ensuring correct polarity. Close the compartment securely.

Initial Preparation

Before first use, remove the protective cap from the electrode. Rinse the electrode with distilled water and gently blot dry with a clean tissue. It is recommended to perform a calibration before the first measurement for optimal accuracy.

Operating Instructions

pH Meter Operation

1. Turn on the pH meter by pressing the "ON/OFF" button.
2. Immerse the electrode into the solution to be tested. Ensure the electrode is fully submerged but do not immerse the entire meter.
3. Gently stir the solution and wait for the reading to stabilize on the LCD screen.
4. Press the "HOLD" button to lock the reading for easier viewing and recording. Press "HOLD" again to release.
5. After use, rinse the electrode with distilled water and replace the protective cap.

Image: VIVOSUN pH Meter displaying a high accuracy reading. The meter features a clear LCD, ON/OFF, CAL, and HOLD buttons.

TDS/EC/Temperature Meter Operation

1. Turn on the TDS meter by pressing the "ON/OFF" button.
2. Press the "MODE" button to switch between TDS (ppm), EC (µS/cm), and Temperature (°C/°F) display modes.
3. Immerse the electrode into the solution to be tested. Ensure the electrode is fully submerged.
4. Gently stir the solution and wait for the reading to stabilize.
5. Press the "HOLD/CAL" button briefly to lock the reading. Press again to release.
6. After use, rinse the electrode with distilled water and replace the protective cap.

Image: VIVOSUN TDS/EC Meter showing different measurement modes for TDS, EC, and temperature. The meter has ON/OFF, MODE, and HOLD/CAL buttons.

Calibration

Regular calibration ensures the accuracy of your meters. Calibration powders are included for pH meter calibration. TDS meter calibration requires a 1413 µS/cm standard solution (purchased separately).

pH Meter Calibration (Three-Point Recommended)

1. Prepare three separate solutions using the provided pH 4.00, pH 6.86, and pH 9.18 buffer powders, each dissolved in 250ml of distilled water.
2. Turn on the pH meter.
3. Immerse the electrode into the pH 6.86 buffer solution.
4. Press and hold the "CAL" button until the display flashes "CAL" and then the pH value. Release the button. The meter will automatically recognize the buffer and calibrate. Wait for the reading to stabilize and stop flashing.
5. Rinse the electrode with distilled water.
6. Repeat steps 3-4 for the pH 4.00 buffer solution.
7. Rinse the electrode with distilled water.
8. Repeat steps 3-4 for the pH 9.18 buffer solution.
9. After successful calibration, the meter will return to measurement mode.

TDS Meter Calibration

1. Prepare a 1413 µS/cm standard solution (not included, must be purchased separately).
2. Turn on the TDS meter and switch to EC mode (µS/cm).
3. Immerse the electrode into the 1413 µS/cm standard solution.
4. Press and hold the "HOLD/CAL" button until the display flashes "CAL" and then the EC value. Release the button. The meter will automatically recognize the solution and calibrate. Wait for the reading to stabilize and stop flashing.
5. Rinse the electrode with distilled water and replace the protective cap.

Maintenance

• Cleaning: Always rinse the electrodes with distilled water after each use to prevent contamination. Do not use tap water or other cleaning agents.
• Storage: Store the meters with their protective caps on. For pH meters, keep the electrode moist by adding a few drops of pH storage solution or distilled water to the cap if storing for extended periods. Do not store dry.
• Battery Replacement: Replace batteries when the display becomes dim or the meter fails to power on. Ensure correct battery type and polarity.
• Calibration Frequency: Calibrate the pH meter regularly, especially if used frequently, if high accuracy is required, or if readings appear inconsistent. Calibrate the TDS meter as needed, typically less frequently than the pH meter.

Troubleshooting

• Inaccurate Readings:
  • Ensure the meter is properly calibrated.
  • Check if the electrode is clean and free from residue.
  • Verify the sample temperature is within the meter's operating range.
  • For pH meters, ensure the electrode is not dry; rehydrate if necessary.
• Meter Not Turning On/Dim Display:
  • Replace the batteries.
  • Check battery polarity.
• Slow Response Time:
  • The electrode might be dirty or aging. Clean or consider replacing the meter if it's old.
  • Ensure the electrode is fully submerged in the solution.
• "ERR" Message During Calibration:
  • Ensure the correct buffer solution is used for calibration.
  • Verify the buffer solution is fresh and not expired.
  • The electrode may be damaged or at the end of its lifespan.

Specifications

Image: VIVOSUN pH and TDS meters highlighting the Automatic Temperature Compensation (ATC) feature, showing how temperature variations are accounted for in measurements.

Applications

The VIVOSUN Digital pH and TDS Meter Kits are versatile tools suitable for a wide range of water quality testing needs, including:

• Drinking Water Quality Monitoring
• Hydroponics and Plant Nutrient Solutions
• Swimming Pools and Spas
• Aquariums and Fish Tanks
• Reverse Osmosis (RO) and Deionized (DI) Water Systems
• Brewing and Food Preparation
• Laboratory and Educational Use

Image: A visual guide to the pH scale and various applications for water quality testing, including drinking water, aquariums, hydroponics, swimming pools, brewing, and tap water.

Warranty and Support

VIVOSUN products are designed for reliability and performance. For warranty information, technical support, or service inquiries, please refer to the contact information provided on the product packaging or visit the official VIVOSUN website. Keep your purchase receipt as proof of purchase for warranty claims.