KETOTEK KT-B0028 Digital AC Power Monitor 6-in-1 with CT Sensor User Manual

1. Introduction

Thank you for choosing the KETOTEK KT-B0028 Digital AC Power Monitor. This device is designed to provide comprehensive electrical parameter monitoring in a compact, embedded form factor. It accurately measures AC voltage, AC current, active power, electrical energy (kWh), power factor, and frequency, displaying all six parameters simultaneously on a clear, backlit LCD screen. Please read this manual thoroughly before installation and operation to ensure safe and correct usage.

2. Product Features

• 6-in-1 Measurement: Simultaneously displays AC Voltage, AC Current, Active Power, Electrical Energy (kWh), Power Factor, and Frequency.
• Color HD LCD Display: Features a 360° viewing angle with backlight for clear visibility in various lighting conditions.
• Auto-Save Function: Automatically saves the accumulated electrical energy (kWh) value when power is off, resuming accumulation upon power restoration.
• Energy Reset Function: Allows manual resetting of the electrical energy (kWh) data.
• High Precision & Safety: Constructed from flame-retardant ABS material with a high-precision chip for reliable and safe operation.
• Wide Application: Suitable for power measurement systems, schools, markets, home appliances, industrial settings, and laboratories.

Image: Front view of the KETOTEK KT-B0028 Digital AC Power Monitor, showing its multi-color LCD display with various electrical parameters.

3. Specifications

Image: Technical drawing showing the dimensions of the KETOTEK KT-B0028 Digital AC Power Monitor.

4. Safety Information

To prevent electric shock, fire, or personal injury, please observe the following safety precautions:

• This device is intended for measuring AC current at 50/60Hz in standard urban power grids only.
• DO NOT use this meter to measure square waves, inverter outputs, or non-standard sine waves, as this will damage the device and may pose a safety risk.
• Ensure all wiring is performed by a qualified electrician and complies with local electrical codes.
• Always disconnect power before installing or servicing the meter.
• Do not operate the device if it appears damaged or is not functioning properly.
• Keep the device away from water, moisture, and extreme temperatures.
• The CT sensor must be connected correctly as per the wiring diagram. Incorrect connection can lead to inaccurate readings or damage.

5. Installation

5.1 Physical Installation

The KETOTEK KT-B0028 is designed for embedded panel mounting. Ensure you have a suitable opening in your panel for installation. The product body size is 5.2 x 5 x 5.5 cm. Refer to the dimensions image for precise measurements.

5.2 Wiring Instructions

WARNING: Ensure power is disconnected before proceeding with wiring.

1. Connect Voltage Input: Connect the AC power supply (50.0-300.0V) to the voltage input terminals on the back of the meter.
2. Connect CT Sensor: The Current Transformer (CT) sensor is used to measure AC current. Pass the wire of the circuit you wish to measure through the hole of the CT sensor.
3. Connect CT Sensor to Meter: Connect the two wires from the CT sensor to the dedicated CT input terminals on the meter. Ensure correct polarity if specified, though typically CTs are not polarity sensitive for basic current measurement.

Image: Rear view of the meter, illustrating the voltage input terminals and the CT sensor connection points.

Image: Detailed wiring diagram showing how to connect the CT sensor to the meter and pass the load wire through the CT.

6. Operation

Once the meter is correctly installed and wired, apply AC power to the voltage input terminals. The meter will automatically power on and begin displaying the measured electrical parameters on its LCD screen.

6.1 Display Readings

The LCD screen simultaneously displays the following six parameters:

• AC Voltage (V)
• AC Current (A)
• Active Power (W)
• Electrical Energy (kWh)
• Power Factor (PF)
• Frequency (Hz)

The display is designed for clear readability from a 360° angle, with a backlight for enhanced visibility in low-light conditions.

7. Resetting Energy Data

The electrical energy (kWh) value accumulates over time. To reset this value:

1. Locate the small reset button on the bottom right side of the meter. This button is typically recessed to prevent accidental presses.
2. Using a thin, pointed object (such as a needle or a straightened paper clip), gently press and hold the reset button for approximately 4 seconds.
3. The electrical energy (kWh) display will reset to 0, and the meter will begin accumulating new energy data.

Image: Close-up view indicating the location of the recessed reset button on the side of the meter.

8. Troubleshooting

If you encounter issues with your KETOTEK KT-B0028 Digital AC Power Monitor, refer to the following common problems and solutions:

If the problem persists after attempting these solutions, please contact KETOTEK customer support for further assistance.

9. Maintenance

The KETOTEK KT-B0028 Digital AC Power Monitor requires minimal maintenance. Follow these guidelines to ensure its longevity and accurate performance:

• Cleaning: Use a soft, dry cloth to clean the display and exterior of the meter. Do not use abrasive cleaners, solvents, or immerse the device in water.
• Environment: Operate and store the meter in a clean, dry environment, away from direct sunlight, extreme temperatures, and high humidity.
• Inspection: Periodically inspect the wiring connections to ensure they are secure and free from corrosion or damage.
• Avoid Impact: Protect the device from physical shocks or impacts, which can damage internal components or the display.

10. Warranty and Support

KETOTEK products are manufactured to high-quality standards. For warranty information, technical support, or service inquiries, please refer to the contact information provided with your purchase or visit the official KETOTEK website. Please have your model number (KT-B0028) and purchase details ready when contacting support.