7
5.5 RESISTANCE (
Ω
) MEASURING PROCEDURE
(1) Press the POWER button to turn the power on
(2) Select the range switch for the maximum expected resistance.
(3) Insert the black test leads into the “COM” jack, and the red one
into the “V/Ω/Hz” jack;
(4) Turn the range switch to resistance po sition, and then connect the
test leads at the two ends of the resistor.
(5) If DISPLAY show “1”, It indicate on Out -of-Range measurement. If
the display indicates one or more leading zeros, shift to the next
lower range scale to improve the resolution of the measurement.
Note:
(a)
When input is open circuit, it will display status 1;
(b)
When measuring resistance on line, ensure that all power of
circuit tested are turn down and all capacitor are discharged
completely;
(c)
Never input voltage if in resistance measurement mode!
(d)
It normal for resistance higher than 1MΩ that the reading data is
not stable for the first several seconds;
5.6 Transistor hFE
1. Press the POWER button to turn the power on
2. Turn the range switch to “hFE” position;
3. To determine the transistor ’s type, NPN or PNP, insert the emitting,
base and collector electrode into the corresponding jacks in testing
accessory.
5.7 DIODE AND CONTINUITY TEST
1. Press the POWER button to turn the power on
2. Insert the black test leads into “COM “
j
a
c
k
, and the red one into the
“Ω
” jack;
3. connect test leads in parallel to the diode tested, with the red test
leads to the anode and the black to cathode, then the reading value
will be approximate forward voltage drop of the diode;
4. Connect pencils to two points of the circuit to be tested, if buzzer
sounds, then the resistance between the two points is lower than
