1、 Preparation before operation

1. Familiar with equipment manuals
   • Read the equipment manual in detail to understand the technical parameters (such as maximum output voltage/current, pulse width, rise time, etc.), operating procedures, and safety specifications.
   • Confirm the applicable range of the equipment and avoid using it beyond the range (such as testing non diode components or diodes that exceed the rated parameters).
2. Check the equipment status
   • Appearance inspection: Confirm that the equipment casing is not damaged and the wiring terminals are not loose or corroded.
   • Functional testing: Verify whether the device output is normal by short circuiting the test terminal (or using a dedicated test load) to avoid false testing caused by device failure.
   • Grounding inspection: Ensure that the equipment is well grounded and the grounding resistance meets the requirements (usually ≤ 4 Ω) to prevent leakage or electrostatic interference.
3. environmental adaptation
   • Temperature and humidity: Keep the ambient temperature between 5-40 ℃ and relative humidity ≤ 85% to avoid equipment performance degradation or short circuit caused by high temperature or high humidity.
   • Dust and corrosion prevention: Keep away from dust and corrosive gas environments, and use dust covers or air purification equipment if necessary.
   • Space requirement: Adequate heat dissipation space should be reserved around the device to avoid stacking with other devices.

2、 Testing process specification

1. Parameter Settings
   • Voltage/current limitationSet the output upper limit based on the rated parameters of the diode (such as reverse breakdown voltage, maximum forward current) to avoid component damage caused by overvoltage/overcurrent.
   • Pulse parametersReasonably adjust parameters such as pulse width and rise time to simulate actual surge scenarios (such as lightning strikes and power switching).
   • trigger modeWhen selecting single trigger or continuous trigger mode, it is necessary to clarify the testing requirements to avoid repeated impacts caused by misoperation.
2. Wiring and Connection
   • Specialized testing fixtureUse a testing fixture that matches the diode packaging to ensure good contact and no risk of short circuit.
   • Cable SelectChoose specialized cables that are resistant to high voltage and low impedance to avoid signal attenuation or interference caused by cable length or bending.
   • Polarity confirmationStrictly distinguish between positive and negative polarities to prevent reverse connection from causing diode breakdown.
3. Test Process
   • Pre testing inspectionAfter confirming the parameter settings and wiring are correct again, perform a low-energy pre-test to observe if the diode response is normal.
   • Gradually increase pressure/flowStarting from low parameters, gradually increase the output and record the performance changes of the diode to avoid direct high-energy impact causing component damage.
   • Multi cycle testingIf simulating repeated surge scenarios, it is necessary to set reasonable testing cycles and intervals to prevent component overheating.

3、 Safety protection measures

1. personal protection
   • Operators need to wear insulated gloves, protective goggles, and anti-static clothing to avoid direct contact with high-voltage parts.
   • Do not touch the interior or live parts of the device during the testing process to prevent electric shock.
2. Equipment safety
   • overload protectionEnable the device's built-in overvoltage/overcurrent protection function and set a safety threshold before testing.
   • Emergency stopFamiliarize yourself with the position of the emergency stop button and immediately turn off the power in case of abnormal situations.
   • Isolation measuresDuring testing, isolate the equipment from the power source and use isolation transformers or UPS power supply to reduce grid interference.
3. Fire and explosion prevention
   • Fire extinguishing equipment is equipped in the testing area, and the storage of flammable and explosive materials is prohibited.
   • If testing high-energy surges, it should be conducted in a shielded room to prevent electromagnetic radiation from interfering with other equipment.

4、 Maintenance and Calibration

1. regular cleaning
   • Use a dry soft cloth to wipe the surface of the equipment to avoid dust accumulation that affects heat dissipation.
   • Regularly clean the cooling fan and fins to ensure good ventilation.
2. Component Inspection
   • Check whether capacitors, resistors, and other components are aging or damaged, and replace them in a timely manner.
   • Verify the contact performance of the testing fixture and replace worn parts if necessary.
3. Calibration and Verification
   • Regularly calibrate output parameters (such as voltage, current, pulse width) according to equipment instructions or standard requirements.
   • Verify the accuracy of the equipment using standard sources or diodes with known performance to ensure reliable test results.

5、 Common Problems and Solutions

1. Unstable output
   • reasonPower supply fluctuations, poor contact, and component aging.
   • solveCheck the stability of the power supply, rewire, and replace aging components.
2. The test results have a large deviation
   • reasonParameter setting error, environmental interference, device not calibrated.
   • solveVerify parameter settings, optimize testing environment, and recalibrate equipment.
3. Equipment alarm or shutdown
   • reasonOverload, overheating, and protection functions triggered.
   • solveReduce output parameters, check the cooling system, troubleshoot and reset.