WinApex ET8138 Touch Sensitive Multimeter User Manual

1. Introduction

The WinApex ET8138 is an advanced, ultra-thin, touch-sensitive digital multimeter designed for precise electrical measurements. Featuring a large 3.5-inch color LCD display, automatic range identification, and a compact design comparable to a 4.7-inch mobile phone, it offers intuitive and efficient operation for both professionals and DIY enthusiasts. This manual provides comprehensive instructions for the safe and effective use of your ET8138 multimeter.

2. Safety Information

Always observe basic safety precautions when using this multimeter to avoid personal injury or damage to the meter or equipment under test. Read the following safety information carefully before use.

• Do not exceed the maximum input limits for any measurement function.
• Use extreme caution when working with voltages above 30V AC RMS, 42V peak, or 60V DC. Such voltages pose a shock hazard.
• Disconnect the test leads from the circuit before changing functions.
• Do not use the meter if it appears damaged or if the insulation on the test leads is compromised.
• Ensure the battery cover is securely closed before operation.
• Do not operate the meter in explosive gas, vapor, or dust environments.
• Adhere to the safety level: CAT III 600V (500V AC MAX).

3. Package Contents

Verify that all items are present in your package:

• 1 x WinApex ET8138 Multimeter
• 1 x Pair of Test Probes (Red and Black)
• 1 x English User Manual
• 1 x Draw String Storage Pouch (Black)

Image: The WinApex ET8138 multimeter shown with its integrated test probes and the included black drawstring storage pouch. The probes are permanently attached to the multimeter, designed to prevent loss and incorrect insertion.

4. Product Overview

The ET8138 multimeter features a sleek design with a large color LCD display and integrated test leads for convenience and safety.

Image: A clear view of the WinApex ET8138 multimeter's front panel, showcasing its large digital display, touch-sensitive buttons for power, hold, backlight/flashlight, and NCV/Live functions, along with the integrated test leads.

4.1. Display Features

• 6000 Counts (3 5/6): High-resolution digital display.
• Color LCD Display: Provides clear and vibrant readings.
• Simulation Bar: An analog bar graph for intuitive and fast representation of measurements.
• Automatic Identification: Automatically detects measurement type (voltage, resistance, etc.).
• Temperature Display: Shows room temperature.
• Frequency Display: Indicates frequency in Hz.

Image: The multimeter's display showing a frequency reading of 0050 Hz and a voltage reading of 234.5 V, demonstrating its ability to display multiple parameters simultaneously. The safety level CAT III 600V is also visible.

4.2. Integrated Test Probes

The ET8138 features integrated test probes, meaning they are permanently connected to the multimeter. This design prevents the loss of probes and ensures correct connection, enhancing safety and convenience.

• Material: Brass/PVC
• Total Length: 66.8 cm

Image: A detailed view of the red and black integrated test probes, showing their tips and the connection point to the multimeter. The image highlights the robust construction and the protective caps for the probe tips.

5. Specifications

6. Setup

6.1. Battery Installation

The WinApex ET8138 requires 2 x AAA batteries (not included) for operation.

1. Locate the battery compartment on the rear of the multimeter.
2. Open the battery cover.
3. Insert two AAA batteries, observing the correct polarity (+ and -) as indicated inside the compartment.
4. Close the battery cover securely.

7. Operating Instructions

7.1. Power On/Off

• To power on the multimeter, press the Power button (red circle icon) on the touch screen.
• The multimeter will automatically enter auto-ranging mode.
• To power off, press and hold the Power button until the display turns off.
• The device features an automatic shutdown after approximately 5 minutes of no operation to conserve battery life.

7.2. Automatic Measurement

The ET8138 features automatic identification, simplifying measurements. Simply connect the test probes to the circuit, and the multimeter will automatically detect and display the measurement type (DC/AC Voltage, Resistance, Capacitance, or Frequency).

7.3. Data Hold Function

To freeze the current reading on the display, press the HOLD button. Press it again to release the hold and resume live readings.

7.4. Backlight and Flashlight

Press the Backlight/Flashlight button (light bulb icon) to toggle the display backlight or activate the built-in flashlight for improved visibility in low-light conditions.

7.5. Non-Contact Voltage (NCV) Measurement

The NCV function allows for detection of AC voltage without direct contact with the conductor.

1. Press the NCV button on the touch screen to enter NCV mode.
2. Move the top end of the multimeter close to the conductor.
3. The display will show "EF" and the signal strength will be indicated by bars. The stronger the signal, the more bars will be displayed, and an audible alarm may sound.
4. If no signal is detected, "EF" will be displayed without bars.

Image: The multimeter demonstrating the Non-Contact Voltage (NCV) measurement function. The display shows "EF" and signal strength bars, indicating the presence of an electric field without direct contact.

7.6. Live Wire Identification (Zero Line of Fire)

This function helps distinguish between live and null wires.

1. Press the Live button on the touch screen.
2. Insert the red test probe into the socket or touch the conductor.
3. If "OL" is displayed on the screen and an alarm "dripping" sound is heard, it indicates a Live Wire.
4. If "LIVE" is displayed and there is no alarm sound, it indicates a Null Wire.

Image: The multimeter demonstrating live wire detection (left, showing "OL" and an alarm) and null wire detection (right, showing "LIVE" without an alarm), illustrating how to differentiate between active and neutral conductors.

7.7. Diode Test (On and Off Test)

The multimeter can perform a diode test, indicating a forward voltage drop of approximately 0.6V for a healthy diode.

• The multimeter automatically identifies this function when connected to a diode.
• Connect the red probe to the anode and the black probe to the cathode.
• A reading around 0.6V indicates a good diode. "OL" indicates an open circuit.

8. Maintenance

8.1. Battery Replacement

When the battery indicator appears on the display, replace the batteries promptly to ensure accurate readings.

1. Power off the multimeter and disconnect all test leads from any circuit.
2. Open the battery compartment cover on the rear.
3. Remove the old AAA batteries and insert new ones, observing correct polarity.
4. Close the battery cover securely.

8.2. Cleaning

Wipe the case with a damp cloth and mild detergent. Do not use abrasives or solvents. Ensure the multimeter is completely dry before use.

8.3. Storage

When not in use for extended periods, remove the batteries to prevent leakage. Store the multimeter in its provided storage pouch in a cool, dry place, away from direct sunlight and extreme temperatures.

9. Troubleshooting

10. Warranty and Support

This WinApex ET8138 Multimeter is manufactured to high-quality standards. For any questions regarding operation, maintenance, or troubleshooting not covered in this manual, please contact the retailer or manufacturer for support.

Please retain your proof of purchase for any warranty claims. Specific warranty terms and conditions may vary by region and retailer.