THE Schaffner model NSG 438 electrostatic discharge gun from Westek Electronics is suited to immunity testing to European norms.
The testing system is therefore practically obligatory for manufacturers and designers of equipment destined for Europe and other export markets where European norms are imposed.
The NSG 438 can be battery and mains operated making it suitable for application in difficult to reach spots of the equipment under test.
The peak discharge voltage of the gun is adjustable from 200 volt to 30 kilovolts in 100 volt steps. Single or repetitive pulses are provided.
For repetitive pulses, frequency is adjustable from 0.5 to 25Hz in five steps. This permits a very flexible testing regime beyond the scope of the norm requirements, but facilitates checking the performance of surge suppression components and other critical devices.
The NSG 438 is provided as standard with a pulse delivery network in accordance with pulse specifications of EN61000-4-2. Other networks providing pulses to ISO10605 and ANSI are optionally available.
Test pulses can be positive or negative polarity or alternating polarity. Triggering can be means of the gun's trigger button or remotely via a control signal. A pulse counter allows forward or backward counting presets to 9999 counts.
The NSG 438 is microprocessor-controlled, making it possible to store and recall IEC, ISO, and eight user-defined test protocols.