allsun EM264 AC/DC Clamp Meter Multimeter Instruction Manual

1. Safety Information

Please read and understand all safety instructions before operating the allsun EM264 AC/DC Clamp Meter Multimeter. Failure to follow these instructions may result in electric shock, fire, or personal injury.

• This device is rated for CAT III 600V. Always ensure the measurement category is appropriate for the circuit being tested.
• Do not touch the conductor being measured with bare hands. Use the tactile barriers provided on the clamp meter to prevent accidental contact.
• Ensure the battery cover is securely fastened before use to maintain double insulation and prevent electric shock.
• Do not apply input voltage to the output terminals.
• Replace the battery promptly when the low battery indicator (red LED) illuminates to ensure accurate readings and proper operation.
• Always turn off the device when not in use to conserve battery life.

2. Product Overview

2.1 Key Features

• Accurate AC/DC current measurement up to 400A (600A overload capability).
• Advanced Hall Effect sensor technology for precise readings.
• True RMS conversion for accurate measurement of non-sinusoidal waveforms.
• Dual-range sensitivity: 40A range (10mV/A) and 400A range (1mV/A).
• Non-contact current testing with a 33mm jaw opening for conductors up to Ø28mm.
• One-touch zero calibration to eliminate DC drift errors.
• Visual battery alert (Green/Red LED) for battery status.
• Auto-off function to extend 9V battery life.
• Seamless integration with any multimeter via DC voltage output (0-400mV).
• Compact, handheld, industrial-grade design for various applications.

2.2 Component Identification

Refer to the diagram below for identification of the clamp meter's components.

Figure 1: allsun EM264 AC/DC Clamp Meter Components

1. Jaw: Used to clamp around the conductor to be measured.
2. Tactile Barrier: Designed to prevent fingers from touching the conductor under test. Do not hold the Current Probe anywhere beyond the tactile barrier.
3. LED Indicator: Lights up after the Current Probe is turned on. Green indicates sufficient battery voltage; Red indicates low battery (≤7.5V) and requires replacement.
4. Trigger: Used to open and close the jaws.
5. Range Switch: Used to turn on/off the Current Probe and select the desired measurement range (40A or 400A). The two 'OFF' positions extend battery life during storage.
6. ZERO Button: Press this button for several seconds before DC current measurement to perform zero calibration.
7. AC/DC Button: Used to select AC or DC measurement function.
8. Output Plug: Insert these two output plugs into the voltage input terminals of a multimeter for measurement. The black output plug must be connected to the 'COM' terminal of the multimeter.

3. Setup

3.1 Battery Installation

The allsun EM264 requires one 9V battery (not included). Follow these steps to install the battery:

1. Locate the battery compartment on the back of the clamp meter.
2. Use a screwdriver to loosen the screw securing the battery cover.
3. Remove the battery cover.
4. Connect a new 9V battery to the battery clips, ensuring correct polarity.
5. Place the battery into the compartment.
6. Replace the battery cover and tighten the screw.

Figure 2: Battery compartment and installation

3.2 Connecting to a Multimeter

The allsun EM264 is a current probe that outputs a voltage signal proportional to the measured current. It must be connected to a multimeter capable of measuring DC millivolts.

1. Ensure your multimeter is set to measure DC voltage (mV or VDC range).
2. Insert the black output plug of the EM264 into the 'COM' terminal of your multimeter.
3. Insert the red output plug of the EM264 into the 'V' or 'mV' input terminal of your multimeter.
4. The multimeter will display a voltage reading, which corresponds to the current measured by the clamp meter based on the selected sensitivity.

Figure 3: Connecting the EM264 to a multimeter

4. Operating Instructions

4.1 Power On/Off and Range Selection

The Range Switch (5) controls power and measurement range:

• Slide the switch to the '40A' position for measuring currents up to 40A. In this range, the output sensitivity is 10mV/A.
• Slide the switch to the '400A' position for measuring currents up to 400A. In this range, the output sensitivity is 1mV/A.
• To turn off the device, slide the switch to either of the two 'OFF' positions.

Figure 4: Range switch for power and sensitivity selection

4.2 AC/DC Mode Selection

Press the AC/DC Button (7) to toggle between Alternating Current (AC) and Direct Current (DC) measurement modes. The selected mode is indicated by the marks next to the button.

4.3 Zero Calibration (for DC Current)

Before measuring DC current, it is crucial to perform a zero calibration to eliminate any offset or drift from the Hall Effect sensor:

1. Ensure the clamp jaws are closed and there is no conductor inside.
2. Press and hold the ZERO Button (6) for several seconds until the multimeter reading stabilizes near zero.
3. Release the button. The device is now calibrated for DC measurement.

4.4 Measuring Current

To measure current:

1. Connect the EM264 to your multimeter as described in Section 3.2.
2. Select the appropriate range (40A or 400A) using the Range Switch (5).
3. Select AC or DC mode using the AC/DC Button (7). Perform zero calibration if measuring DC current.
4. Press the Trigger (4) to open the jaws.
5. Carefully place the jaw around a single conductor of the circuit you wish to measure. Ensure the jaws close completely around the conductor.
6. Read the voltage displayed on your multimeter.
7. Calculate the current using the formula: Current (A) = Multimeter Reading (mV) / Sensitivity (mV/A). For example, if in 40A range (10mV/A) and multimeter reads 150mV, the current is 150mV / 10mV/A = 15A.

Figure 5: Measuring current with the clamp meter

4.5 Product Video: EM264 Current Meter Overview

5. Maintenance

• Cleaning: The wipeable casing can be cleaned with a damp cloth. Do not use abrasive cleaners or solvents.
• Battery Replacement: When the red LED indicator lights up, replace the 9V battery as described in Section 3.1.
• Storage: Store the clamp meter in its protective case in a dry environment, away from direct sunlight and extreme temperatures. Ensure the device is turned off (Range Switch in 'OFF' position) before storage.

6. Troubleshooting

7. Specifications

8. Warranty and Support

For warranty information, technical support, or service inquiries, please contact allsun customer service or refer to the official allsun website. Keep your purchase receipt for warranty claims.

You can find more information and products from allsun by visiting the allsun Store on Amazon.