$13.70 Desktop Analog Multimeter Voltmeter Ammeter AC DC Meter OHM YX961TR

Range notations(0.1-1000)indicates the maximum voltage reading for that range.
AC Voltage(ACV)
Voltage of commercial AC supply, AC powered circuits, AF signal level, are measured. Each of the 4 range notations(10-1000)indicates the maximum voltage reading for that range.
DC Current(DCA)
Current consumption of DC power operated equipment, bias current of tube and transistor circut are measured. Each of the 4 range notations (50uA-205A)indicates the maximum current reading for that range.
Resistance
Resistance is measured, and line and circuit continuity is tested. Each of the 5 range notations indicates the multiplication of the reading for that range, where k stands for 1000
Battery Test
Good battery: The pointer stays within the ? range, the battery may be used for a small transistor radio, but not for equipment that needs power. Bad battery: The pointer stays within the RED range.
dB Test
For measurement on the 10V range, the dB scale(-10dB to +22dB)is read directly, but when measured on the 50V range, 14dB is added. On the 250V range, 28dB is added to the reading on the scale, and on the 1000V range 40dB is added. Thus, the maximum dB readable is 22+40=62(dB) measured on the 1000V range.
Iceo(leakage current) Test
Plug the test leads into + and - COM sockets.
Set the range selector to x10(15mA) for small size transistor or to x1(150mA) for big size transistor.
Adjus 0 Ohm ADJ to set the pointer to zero position of the Ohm scale.
Connect the transistor with the tester.
For NPN transistor, the "N" terminal of the tester is connected with the COLLECTOR(C) of the transistor and the "P" terminal with the EMITTED(E) of the transistor. For "PNP" transistor, reverse the NPN transistor connection.
If the reading falls within the red LEAK zone of the Iceo scale, the TR tested is passable, but if it goes beyond the zone coming near to the full scale, the TR is definitely defective.
hfe (DC amplification) TEST
Set the range selector to x10.
Adjust 0 Ohm ADJ to adjust the pointer to zero position.
Insert hfe terminal(on scale)directly.
Read the hfe scale. The valule of the reading is Ic/Ib, which is the DC amplification degree of the transistor tested.
Diode Test
Set the range selector at a selected range position x1K for 0-150 uA, x100 for 0-1.5 mA, x10 for 0-15 mA, x1 for 0-150 mA test.
Connect the diode to the tester:
For IF (forward current) test, connect the "N"terminal of the tester to the positive polarity of the diode and the "P" terminal to the negative polarity of the diode. For IR(reverse current)test, reverse the connection.
Read IF or IR on the LI scale provided.
Read the linear(forward)voltage of the diode on the LV scale while testing IF of IR.


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