1. Unboxing and Basic Familiarization with the Equipment

1.1 Key Technical Specifications

1.2 Unboxing Inspection and Verification of Accessories

1.2.1 Unpacking and Visual Inspection

When unpacking the device, handle it gently to avoid scratching the casing with sharp tools. After unpacking, first inspect the exterior of the device to ensure there is no visible deformation or dents, and that the buttons are not damaged or loose.

If you notice any damage or deformation to the equipment or accessories, do not turn on the power. Please contact us immediately.

1.2.2 Host Computer and Accessories

Main Units: ① EFT61000-4 EFT Immunity Measurement; ② EFT-DESK Standard Test Bench; ③ EFT-CLAMP Capacitive Coupling Clamp.

Figure 1

Note: Items ② and ③ are optional.

The EFT-CLAMP Capacitive Coupling Clamp is used to test I/O lines.

Standard Accessories: ① Power cord; ② or ③ EUT power input cable (choose one);④ EUT power output, used to connect the EUT to the instrument’s front panel; ⑤ coaxial cable, used to connect to an external oscilloscope for waveform monitoring; ⑥ ground wire, used to connect to the PGND protective ground terminal; ⑦ discharge tube, used to check whether the instrument produces a pulse output in the event of a device malfunction.

Figure 2

Download links for the digital user manual, warranty card, and other documents have been sent to you via email. Please download them as soon as possible. If you missed the email, please feel free to contact us to request the download links again.

2. Safety Precautions

2.1 Placement Guidelines

Place it on a stable work surface; avoid tilting or inverting it, and keep it away from sources of vibration;

The equipment must be placed at least 1000 mm away from walls and surrounding structures (such as other testing equipment and shelving) to facilitate maintenance; at least 2000 mm of space must be left in front of the equipment to ensure smooth operation, and there must be no obstructions in the surrounding area.

2.2 High-Voltage Safety Standards

2.2.1 Security Check

Verify that the power supply is compatible with the equipment, ensure that the power supply is properly grounded, and check that the grounding wire is free of damage or looseness;

Grounding Requirements: The host unit’s protective grounding terminal (PGND) must be connected to the ground reference plane; the grounding resistance must be ≤4 Ω; the grounding cable must be securely connected, with no looseness or breaks;

The ground reference plane must be connected to the grounding metal plate and to the ground; all ground connections must have low impedance to prevent potential differences from occurring during discharge.

2.2.2 Safety Requirements for Operational Procedures

Operators must undergo professional training and be familiar with this manual and the relevant standards. Non-professionals are prohibited from operating or disassembling the equipment. The equipment contains high-voltage circuits; opening the cover may pose an electric shock hazard. Contact the manufacturer’s technical staff for repairs;

Once the equipment is powered on, do not touch the terminal blocks, cables, or the EUT;

Operators should ensure their hands are dry and free of metal jewelry; it is recommended that they wear insulated gloves while working;

During testing, unauthorized personnel are prohibited from remaining within 1 meter of the EUT to prevent accidental electric shock or interference from electrical discharges;

Before replacing the electrodes, you must first ensure that the high-voltage output has been turned off (the HV indicator light is off) and wait at least 5 minutes to ensure that the internal high-voltage capacitor is completely discharged;

Do not eat or drink during the test to prevent accidents caused by electric shocks;

When multiple people are involved, clearly define roles and responsibilities, and confirm them with each other before starting the test to avoid errors.

2.3 Other

For matters not covered in this manual, please proceed with caution or contact us.

3. Preparations Before the Test

3.1 Test Environment and Wiring for Power Cord Immunity Testing

3.1.1 Front of the Instrument

① Grounded metal plate, connected to ground via a conductor; ② Wooden test bench; ③ Grounded reference plane, connected to the grounded metal plate via a ground wire;④ Can be connected to the EUT; ⑤ Can be connected to the EUT; ⑥ Connect the protective ground terminal of the SGND signal line on the front panel of the instrument to the reference ground plane; ⑦ Insulated support; ⑧ EUT test specimen.

Figure 3

The grounding reference plane must meet the following dimensions: thickness ≥ 0.25 mm; it must be large enough to accommodate the EUT, instruments, coupling devices, and all accessories; and it must extend 10 cm beyond the edges on all four sides.

The EUT must be placed on the grounded reference plane using an insulating support with a thickness of 10 cm, and the distance between the bottom of the EUT and the grounded reference plane must be strictly maintained at 10 cm.

The instrument (including the coupling network) shall be placed directly on the grounded reference plane, at a distance of ≥0.5 m from the EUT; the EUT shall be located at a distance of ≥0.5 m from conductive structures such as laboratory walls and anechoic chamber walls.

The length of the power and signal cables connecting the EUT to the test equipment shall be maintained at 0.5 m ± 0.05 m; if the EUT has a built-in, non-detachable cable longer than 0.5 m, the excess length shall be folded (avoiding the formation of a flat loop) and placed 10 cm above the ground reference plane.

3.1.2 Back of the Instrument

① Power cord; ② EUT power input cable—please connect the EUT to a suitable power source; ③ PGND protective ground terminal—please connect to a grounded metal plate.

Figure 4

3.2 Test Environment and Wiring for IO Signal Line Immunity Testing

Place the Capacitive Coupling Clamp on the ground reference plane. ① Connect the ground terminal of the Capacitive Coupling Clamp to the ground reference plane; ② Connect the Capacitive Coupling Clamp to the BNC connector on the instrument’s front panel via a coaxial cable; ③ Route the I/O cable through the Capacitive Coupling Clamp.

Figure 5

Route the EUT’s I/O cables through the capacitive coupling clamp, with one end of each cable connected to the EUT and the other to the AE (auxiliary) device. Place the EUT and the AE device on 10-cm-thick insulated supports, respectively.

Figure 6

The distance between the AE equipment and the EUT must be ≥0.5 m, and its power cord must be connected to the power supply network via a decoupling network to prevent impulse interference from being conducted to auxiliary equipment.

3.3 Confirmation of Test Parameters

3.4 Equipment Warm-up and Self-Test

Turn on the power switch on the front panel of the host; the device enters standby mode, the power indicator lights up, and the cooling fan starts.

Wait 5 minutes for the device to warm up, and check that the touchscreen is displaying normally and that there are no error messages.

4. Introduction to the Touchscreen Program

4.1 Initial Screen

① General Usage Notes (Features are still being developed; no action is required at this time); ② System Information Screen; ③ Switch Between Chinese and English; ④ EFT Test Screen.

Figure 7

4.2 System Information Screen

Test Logs: View or export historical test logs.

Figure 8

4.3 EFT Test Interface

① Test voltage and polarity settings; ② Test duration settings; ③ Pulse train period settings; ④ Pulse repetition frequency settings; ⑤ Phase angle settings; ⑥ Number of pulses settings; ⑦ Automatic coupling option, allowing you to select the required coupling lines all at once;⑧ Manual selection of coupling lines; single or multiple selections are possible; ⑨ Display of the EUT’s current electrical parameters; ⑩ Click to turn the EUT power on or off; ⑪ Click to start or stop the test.

Figure 9

Note: Power port coupling: Select any combination of “L1,” “L2,” “L3,” “N,” and “PE”; Signal port coupling: Select “BNC”; Automatic coupling: Applies interference in the system’s preset order (L1 → L2 → L3 → N → PE → combination), suitable for comprehensive testing.

5. Fast Transient and Burst (FTB) Test

5.1 Operational Procedures

If the EUT requires power, close the EUT power input switch on the back of the device.

Figure 10

Set all test parameters according to sections 3.3 and 4.3.

Click “EUT POWER” to turn on the EUT power supply.

Click “START” to begin the test.

5.2 Determining Whether the EUT Has Passed the Test

6. Post-Test Procedures

6.1 Test Stopped

If the EUT is visibly damaged during the test, immediately tap “Stop Test” on the touchscreen, then tap “EUT Power” to turn off the EUT’s power.

If no abnormalities occur during the test, wait for the pulse test to complete automatically, then click “EUT Power” to turn off the EUT’s power.

Turn off the EUT input power supply switch on the back of the unit.

Wait 5 minutes to ensure that the high-voltage capacitors inside the host unit have fully discharged, then replace the EUT for testing, or turn off the host unit’s power.

6.2 Post-Test Cleanup and Tidying Up

Clean the test area and wipe it down with a dry cloth; do not use alcohol or corrosive cleaning agents.

Pulse testing is a destructive test; it does not automatically generate a test report, but the device automatically saves the test data. You can go to “System Information,” click “Test Log,” and export the corresponding test data to a USB flash drive via the USB port. The exported file is in TXT text format.

6.3 Equipment Storage

6.3.1 Short-Term Storage Requirements

If the equipment is used on a daily basis, no further action is required after each test is completed and the equipment has been cleaned.

6.3.2 Long-Term Storage Requirements

If the device will not be used for an extended period (more than one month), please disconnect all cables and cover the device with a dust cover to prevent dust buildup.

The device should be powered on once a month for just half an hour to prevent the aging of electrical components (such as capacitors and contactors).

7. Troubleshooting and Resolving Common Problems

7.1 The device won’t turn on

Symptom: After turning on the power switch, the device does not respond (the indicator light does not come on, and the fan does not spin).

Possible causes: ① The power cord is not properly connected or is damaged; ② Abnormal supply voltage; ③ A blown fuse; ④ A burned-out varistor (MOV).

Solution: Ensure the power cord is intact and securely connected. Power supply issues—such as unstable voltage, excessively high voltage, or harmonic interference—can cause the fuse or varistor to burn out. We recommend using a regulated, clean sine-wave AC power supply to power the device. Replace the fuse or varistor with one of the same type.

The figure below shows the location of the fuse:

Figure 39

The following figure shows the location of the varistor (MOV) inside the filtered power supply:

Figure 40

7.2 Automatic Device Restart

Symptom: The device automatically restarts during pulse output.

Possible cause: The ground wire is not connected properly.

Solution: Refer to Section 2.2.1. Connect the PGND grounding terminal on the back of the host to ground, and ensure that the grounding resistance is ≤4Ω. Otherwise, high voltage may not be safely dissipated, causing the device to automatically restart.

7.3 Pulse Phase Angle Test Failed

Symptom: The synchronization phase angle has been set, but the pulse test is not being performed according to the corresponding phase angle.

Possible cause: The EUT power supply is not turned on.

Procedure: The EUT must be powered by an AC source, and the EUT must be turned on during testing so that the pulse generator can detect the EUT’s power supply waveform and perform pulse testing according to the set phase angle.