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KPS-MT40 • Digital multimeter
ENG
3.2.6 Transistor measuring
1 Rotate the switch to hFE position.
2 Plug multi-function socket with correct polarity (the “+” end of multi-function
socket is connected with “mA ” end, “COM” end is connected with
common end).
3 Determine that the transistor is NPN or PNP type, then insert three pins of
transistor to the corresponding holes of the dedicated multi-functional socket
4 Read hFE approximation of transistor to be measured from LCD display.
3.2.7 Measuring frequency
To measure frequency:
1 Rotate the switch to Hz position.
2 Respectively connect black and red test probe to COM input socket and
Hz input socket.
3 Measure the frequency value of circuit to be tested with other two ends of
test probes.
4 Read the measuring frequency value from LCDdisplay.
3.2.8 Measuring current
2,000mA, 20,00mA, 200,0mA and 10,00A.
To measure current:
1 Cut off the power supply of circuit to be tested. Discharge all high voltage
capacitors on the circuit to be tested.
2 Rotate switch to the appropriate position.
3 Connect the black test probe to the COM input socket. If the current to
be tested is lower than 200mA, connect the red test probe to the mA input
socket. If the measured current is between the range of 200mA~10A, the red
test probe should be connected to 10A input socket.
4 Cut off the circuit to be tested. The black test probe is connected to one
end of disconnected circuit (low voltage relatively), and the red test probe is
connected to the other end of disconnected circuit (high voltage relatively).
(Connecting test probe in reverse would make the reading negative, but the
meter won’t be damaged.)
5 Connect the power supply of circuit, then read the display reading. If the
display shows only “1”, the input is out of the selected input range, therefore
