Larkin M3K Power Semiconductor SCR and Diode Tester

• Tests components according to JEDEC JC-22 and EIA RS-397 test standards
• Components are tested for forward and reverse leakage current at voltages up to 3000V
• Gate Voltage/Current to trigger is tested and displayed on the panel meters
• Short current limited to 20mA for operator safety
• Oscilloscope output provides the ability to observe the Voltage/Current curve on a X-Y oscilloscope.

Test Rotating Rectifier Modules

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”).

Test 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

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”).