For contact discharge, first touch the discharge tip (sharp tip) to the EUT surface and then pull the trigger once.　The trigger can be released soon. Discharges are automatically repeated in line with settings on the counter and interval.

For the correct air discharge test, the discharge gun shall be positioned at least 50 cm away from the EUT discharge point first and then pull and hold the trigger (this action is required for  the internal high voltage switch in the gun to remain “on” position) and then approach the discharge tip to the EUT until a discharge occurs.

The contact discharge is the method of testing in which the electrode of the test generator is kept in contact with the EUT or coupling plane and the discharge is actuated by the discharge switch within the generator.　　

The air discharge is the method of testing in which the charged electrode of the test generator is moved towards the EUT until it touches the EUT. During this a discharge is activated by a spark.　　The IEC 61000-4-2 standard says “Contact discharge is the preferred test method.　　Air discharges shall be used where contact discharge cannot be applied.” 　

The preference of contact discharges over air discharges comes from its better reproducibility.　　Air discharges are inherently more variable than contact discharges due to factors such as ambient temperature, relative humidity and atmospheric pressure.

Voltage and current monitor ports are provided on the LSS-15AX/F02/F03 surge simulators. For details, please click here.

1. Pull the trigger once and release it soon and then approach the tip to the EUT
2. Pull and hold the trigger and then approach the tip to the EUT

• Discharge from human body
• Discharge from other objects than human body such as production and test equipment or packing materials