GM328A Assembled Transistor Tester LCR Diode ESR Capacitance Meter Z-lk
With poor connection cable a ESR value of 0.02ohm can grow to 0.61ohm. After pushing the RPEWS, the Tester shows in row 1 the type (NPN or PNP), a possible integrated protecting diode of the Collector - Emitter path and the sequence of pins.