DEWIN KWS-AC300 AC 50-300V 100A 6-in-1 Digital Voltmeter Ammeter Instruction Manual

1. Introduction

The DEWIN KWS-AC300 is a versatile 6-in-1 digital multimeter designed for accurate measurement of AC electrical parameters. This device provides real-time readings for voltage, current, active power, timing, temperature, and accumulated electrical energy. Its clear LCD display ensures easy readability of all measured data. This manual provides essential information for the safe installation, operation, and maintenance of your device.

2. Key Features

• 6-in-1 Measurement: Simultaneously displays Voltage (V), Current (A), Active Power (W), Timing (T), Temperature (°C), and Electrical Energy (KWh).
• Vivid LCD Display: Features a clear, multi-color LED screen for enhanced visibility and easy interpretation of data.
• Automatic Data Storage: Electrical energy data is automatically saved in memory when power is interrupted and can be reset.
• Compact Design: Engineered for convenient use and accurate data acquisition.
• Durable Construction: Made from environmentally friendly, flame-retardant ABS+PC material for safety and longevity.

3. Safety Information and Important Notes

Please read and understand the following safety information before installation and operation:

• This digital voltmeter ammeter is suitable only for pure AC networks operating at 50-63 Hz.
• Do not use this device to measure the output of square wave inverters or repaired sine wave circuits. Doing so may cause damage to the device and pose a safety risk.
• Ensure all wiring is performed by a qualified professional to prevent electrical hazards.
• Always disconnect power before installing or servicing the device.

4. Setup and Installation

The DEWIN KWS-AC300 is designed for embedded buckle installation, ensuring a stable and secure fit. Follow the wiring diagram carefully for correct connection.

4.1 Wiring Diagram

This image illustrates the 100A closed transformer wiring. Connect the 'L' (Live) and 'N' (Neutral) wires from your AC source (50-300V) to the corresponding terminals on the meter. The load (electrical appliance) should be connected as shown, with the current transformer (CT) clamped around the live wire leading to the load. Ensure all connections are tight and secure.

4.2 Physical Installation

The meter features an embedded buckle design for stable installation. Simply insert the meter into the designated panel cutout until the buckles engage securely. This method ensures a firm and reliable mounting.

4.3 Temperature Sensor Connection

Connect the provided temperature sensor wire to the dedicated port on the meter. Position the sensor in the area where temperature measurement is desired. The meter will display the temperature in degrees Celsius.

5. Operating Instructions

Once properly installed and powered on, the DEWIN KWS-AC300 will automatically begin displaying measurements on its LCD screen.

5.1 Display Overview

The multi-color LCD screen provides a clear overview of all measured parameters. You will see readings for Voltage (V), Current (A), Active Power (W), Timing (T), Temperature (°C), and Electrical Energy (KWh).

5.2 Using the MENU Button

The 'MENU' button on the front panel allows you to cycle through different display modes or view accumulated data. Refer to the on-screen prompts or specific product variations for detailed menu navigation.

5.3 Resetting Electrical Energy Data

The device automatically stores electrical energy data. To reset the accumulated electrical energy (KWh) reading, press and hold the 'MENU' button for approximately 5 seconds until the KWh value resets to zero. This function is useful for monitoring energy consumption over specific periods.

6. Maintenance

The DEWIN KWS-AC300 is constructed from durable ABS+PC material, requiring minimal maintenance.

• Cleaning: Use a soft, dry cloth to clean the display and casing. Avoid abrasive cleaners or solvents.
• Environment: Ensure the device is operated within its specified temperature range (-9 to 99 °C) and protected from excessive moisture or direct sunlight.
• Inspection: Periodically check wiring connections for tightness and signs of wear.

7. Troubleshooting

If the device is not functioning as expected, consider the following:

• No Display/Incorrect Readings: Verify that the power supply is within the AC 50-300V range and that all wiring connections are correct and secure.
• Inaccurate Current/Power Readings: Ensure the current transformer (CT) is correctly installed around the live wire and connected to the meter.
• Device Damage: If the device was connected to a square wave inverter output or repaired sine wave circuit, it may be damaged. This device is strictly for pure AC networks of 50-63 Hz.

8. Specifications

The image above provides a visual representation of the meter's dimensions and a summary of its technical specifications.

9. Application Scenarios

The DEWIN KWS-AC300 digital meter is suitable for a wide range of measurement applications:

• Chemical Industry
• Power Plants
• Automation Equipment
• DOS Systems
• Distribution Boxes
• General Electromechanical Equipment