Question 1

I am trying to measure a inductor and it keeps coming back with a resistance.  How do I fix this?

Accepted Answer

I found out that the tester can’t measure inductance below 10uH. It helps to buy a pack of inductors of various values to always check the tester. This is how I found out that mine cant’ measure inductors below 10uH.

Question 2

Can it be powered with a cable?

Accepted Answer

I did a simple mod in order to power it from a basic 9vdc power supply l. I simply installed a standard 12mm polarised jack into the case  (theres a slot in the top center of the pcb to allow room) and use a currwnt limited wall wart or bench top piwer supply for the required 9 volts  (solder the 2 wires from the jack  to the battery terminal connections on the pcb matching polarity). Mine has worked a charm and no worries plus you have the option of using either power source. If you would like to know more on this mod reply and I will supply you with a more detailed step by step with photos.

Question 3

will this tester work with germanium transistors? also, does it report transistor leakage?

Accepted Answer

I haven't found a germanium transistor to test yet, but I have tested Ge small-signal diodes with mine, so I'm fairly certain this tester can properly identify and test Ge teansistors as well.   If so, it will show the device type (PNP/NPN), ID the leads (BCE), and show the hfe (gain), but it will not show a leakage current value.
   The primary diference between Ge and Si devices is the difference in the voltage drop across a forward-biased junction. Ge junctions show a 0.3 - 0.4v drop, and Si junctions show 0.6 - 0.7v.

Question 4

will it tell me the pin identification?

Accepted Answer

With in reason.  You will need the spec sheet, say you have a bad unit, it may identify it as two diodes and you know it is not two diodes, it is a 222.  So YES it will / it has done it correctly for me on good devices, on devices that fail, it may show unknown device or something like a mess of diodes  or something else.  Nothing the spec sheet would show.  hope this helps.  I also use a Heathkit transistor tester so I can supply a load.  If you are working with hard to replace /find items, I suggest you also get something that will supply a real load so you can see if it breaks down after 2 minutes or something like that.  hope this helps,  I am pleased with cost vs use I have gotten.  SO far so good.  Get used to getting the pins in 1 2 3 any way, but 1,2,3.   George

ASIN	B01MS1FOYM
Best Sellers Rank	#306,374 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #34 in LCR Meters
Brand	DROK
Brand Name	DROK
Compatible Devices	Transistors (NPN, PNP), MOSFETs (N-channel, P-channel), Diodes, Thyristors, Resistors, Capacitors, Inductors, MOS, SCR, ESR meters
Customer Reviews	4.4 out of 5 stars 1,058 Reviews
Item Weight	4 Pounds
Manufacturer	DROK
Measurement Type	LCR Meter
Min. Operating Voltage	9 Volts
Minimum Operating Voltage	9 Volts
Model	Transistor Tester
Part Number	300427
Power Source	Battery Powered
Style	Voltage Tester
Style Name	Voltage Tester
Unit Count	1.0 Count
Upper Temperature Rating	85 Degrees Celsius

DROKTransistor Tester, Mosfet Transistor Capacitor Tester, Mega328 NPN PNP Transistor Diode Resistor Inductor Capacitance MOS SCR ESR Meter Automatic Checker Detector

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