TAIYEDQ D85-3051AG Dual Two Color LCD Digital Display Voltage and Current Meter

1. Introduction

The TAIYEDQ D85-3051AG is a versatile dual two-color LCD digital display meter designed for precise measurement of DC voltage and current. Featuring a high-definition liquid crystal display with a 178° wide viewing angle, this panel meter provides clear and accurate readings for various electrical applications. Its compact design and flame-retardant material ensure durability and safety.

2. Safety Information

Please read and understand all safety instructions before installing or operating this device. Failure to follow these instructions may result in electric shock, fire, or serious injury.

• Always ensure power is disconnected before making any wiring connections.
• Incorrect wiring can permanently damage the meter and pose a safety hazard. Strictly follow the provided wiring diagrams.
• Do not operate the meter in environments exceeding its specified operating conditions (temperature, humidity, pressure).
• The meter is constructed from high-strength, flame-retardant PC material for enhanced safety.

3. Specifications

4. Setup and Installation

Careful wiring is essential for the correct and safe operation of the D85-3051AG meter. Please follow these instructions precisely.

4.1. Shunt Requirements for Current Measurement

• For current measurement ranges up to and including 10A, the meter has a built-in shunt. No external shunt is required.
• For current measurement ranges above 10A (e.g., 20A, 50A, 100A, 200A), an external shunt must be purchased separately. This external shunt must have specifications matching the meter's measuring range (e.g., for a 0-50A meter, use a 50A/75mV shunt).
• When using an external shunt, it must always be connected, regardless of whether the measured current is greater or less than 10A.

4.2. Power Supply for Voltage Measurement

• If the voltage to be measured is between DC5-30V, this voltage can also serve as the working power supply for the meter. In this scenario, an additional power supply is not needed.
• If you need to measure voltages starting from 0V, or if the measurement voltage is higher than 30V, you MUST provide an additional, separate DC5-30V operating power supply for the meter.

4.3. Wiring Diagrams

The following diagrams illustrate the correct wiring configurations. Strict adherence to these diagrams is critical to prevent damage to the meter.

• Graph 1: Connection for measuring voltage higher than 30V with an internal shunt.
• Graph 2: Connection for measuring voltage higher than 30V requiring an external shunt and external power supply.
• Graph 3: Connection for measuring voltage lower than 30V with an internal shunt, using the measured voltage for work power.
• Graph 4: Connection for measuring voltage lower than 30V requiring an external shunt and external power supply.

Important: The shunt must be connected to the negative pole of the power supply, and the load to be measured must be connected to the positive end of the power supply. Incorrect wiring will burn out the instrument.

5. Operation

Once correctly installed and powered, the D85-3051AG meter will automatically display the measured DC voltage and current on its two-color LCD screen. No further configuration or calibration is typically required for standard operation.

• Reading the Display: The upper display (yellow) shows the DC voltage in Volts (V), and the lower display (blue) shows the DC current in Amperes (A).
• Viewing Angle: The 178° wide viewing angle ensures clear readability from various positions.

6. Maintenance

The D85-3051AG meter is designed for reliable operation with minimal maintenance.

• Cleaning: Use a soft, dry cloth to clean the display and casing. Do not use abrasive cleaners or solvents.
• Storage: Store the meter in a dry, dust-free environment within the specified operating temperature range when not in use.
• Inspection: Periodically check wiring connections for tightness and signs of wear or damage.

7. Troubleshooting

• No Display/Blank Screen:
  • Check if the power supply (DC5-30V) is correctly connected and providing power to the meter.
  • Ensure all wiring connections are secure and correct according to the diagrams in Section 4.3.
• Incorrect Voltage/Current Readings:
  • Verify that the correct shunt is used for the measured current range, especially for ranges above 10A.
  • Recheck all wiring connections against the diagrams. Incorrect polarity or connection points can lead to erroneous readings.
  • Ensure the measurement range of your specific meter model matches the expected values.
• Meter Damaged/Burned Out:
  • This is typically caused by incorrect wiring, especially reversing polarity or connecting the shunt/load improperly. Refer to the warning in Section 4.3.

8. User Tips

• Always double-check your wiring against the provided diagrams before applying power. A small mistake can lead to irreversible damage.
• When measuring low voltages (below 5V) or high voltages (above 30V), remember to use a separate DC5-30V power supply for the meter itself.
• For current measurements above 10A, ensure you have the correct external shunt and that it is properly integrated into the circuit.
• The compact size of the meter makes it suitable for integration into various control panels and DIY projects.

9. Warranty and Support

For any technical assistance, warranty claims, or support inquiries, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.