M3K Power Semiconductor Tester

FEATURES		BENEFITS
	Components are tested for forward and reverse leakage current at voltages up to 3300V.		Marginal components are easily identified during scheduled service, translating into less un-scheduled down-time.
	Tests components according to JEDEC JC-22 and EIA RS-397 test standards		Identify and replace only marginal or bad components, resulting in a dramatic reduction in component costs.
	Oscilloscope output provides the ability to observe the Voltage/Current curve on a X-Y oscilloscope.		Test components before they are being installed to make sure they are functional, and to get a baseline measurement for future reference.
	Gate Voltage/Current to trigger is tested and displayed on the panel meters.		Perform receiving inspection to make sure components meet the specifications
	Short current limited to 20mA for operator safety.

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Typical Test Procedures for Power Semiconductors
PRESS PACK (Hockey Puck) SCRs (Thyristors		Transistor Modules (IGBTs and Darlingtons
	Set the Voltage Control to the zero position (fully counter clockwise) before turning the unit on. Connect the Anode, Gate and Cathode leads to the device to be tested. DO NOT MIX UP THE ANODE AND CATHODE LEADS OR HIGH VOLTAGE WILL BE APPLIED TO THE GATE!		Connect a test lead between the ground plate of the component and the GROUND terminal on the tester. Connect a 100 kohm resitor between the BASE and EMITTER terminals on the tester. DO NOT MIX UP THE COLLECTOR AND EMITTER LEADS OR HIGH VOLTAGE WILL BE APPLIED TO THE BASE!
	Place the function switch in the PRV position and press the �TEST� button. Slowly increase the voltage while observing the Peak Voltage and Peak Leakage Current on the panel meters. In a properly functioning device, the rated voltage should be reached before the current starts to rise rapidly, (the �break-over point�).		Place the function switch in the PRV position and press the �TEST� button. Slowly increase the voltage while observing the Peak Voltage and Peak Leakage Current on the panel meters. In most transistor modules, the current will rise immediately due to the circuit design.
	Place the function switch in the PFV position and repeat procedure described above.		Place the function switch in the PFV position and press the �TEST� button. Slowly increase the voltage while observing the Peak Voltage and Peak Leakage Current on the panel meters. In a properly functioning device, the rated voltage should be reached before the current starts to rise rapidly, (the �break-over point�).
	Place the function switch in the GATE position and slowly raise the Voltage Control while observing the �TRIGGER INDICATION� light. If the light does not turn on, the Gate on the SCR is faulty, and the device should be replaced.		Place the function switch in the BASE position and slowly increase the voltage while observing the �TRIGGER INDICATION� light. If the light does not turn on, the Base is faulty, and the device should be replaced. Note: Typical turn-on voltage is 5-6 V. The current is so low in transistor base circuit, that it will not show on the current meter.
Rotating Rectifier Modules		Stud Mounted Diodes
	Make sure the Voltage Control is at the zero position (fully counter clockwise) before turning the unit on. Connect the Anode and Cathode leads to the diode to be tested. NOTE : Diodes only have to be tested in one direction. If the diode is forward biased (standard), the function switch should be in the PRV position. If the diode is reversed biased, the function switch should be in the PFV position		Make sure the Voltage Control is at the zero position (fully counter clockwise) before turning the unit on. Connect the Anode and Cathode leads to the diode to be tested. NOTE : Diodes only have to be tested in one direction. If the diode is forward biased (standard), the function switch should be in the PRV position. If the diode is reversed biased, the function switch should be in the PFV position
	Place the function switch in the PRV (PFV) position and press the �TEST� button. Slowly increase the voltage while observing the Peak Voltage and Peak Leakage Current on the panel meters. In a properly functioning device, the rated voltage should be reached before the current starts to rise rapidly, (the �break-over point�).		Place the function switch in the PRV (PFV) position and press the �TEST� button. Slowly increase the voltage while observing the Peak Voltage and Peak Leakage Current on the panel meters. In a properly functioning device, the rated voltage should be reached before the current starts to rise rapidly, (the �break-over point�).