measurement. To obtain precision reading in low-resistance
measurement, that is the range of 400.0
Ω
, short the input terminal
before measuring. In this time, the contact resistance displayed on the
LCD. You can subtract the contact resistance value from the measured
value.
For high-resistance measurement (>10M
Ω
), it is normal taking
several second to obtain stable reading.
The LCD display “OL” indicating open-circuit for the tested resistor
or the resistor value is higher than the maximum range of the meter.
5-3. Diode/Continuity check
①
Set the rotary switch to “
” position. First time, default
mode is diode check mode. You can enter the continuity check mode
by the “ FUNC” Key.
②
insert the red test lead into the
“V
Ω
”
terminal and the black test lead
into the “COM” terminal.
③
Use the diode test mode to check diodes, transistors and other
semiconductor device. In the diode test mode sends
a current through
the
semiconductor junction, and the measure the voltage drop across
the junction. A good silicon junction drop between 0.5V and 0.8V.
④
For forward voltage drop reading on any semiconductor component,
place the red test lead on the component anode and place the black test
lead on the component cathode. The measured value show on the
display.
⑤
Reverse the test lead and measure the voltage across the diode again.
If diode is good, the display shows “OL”.
If diode is shorted, the display shows 0 (zero) in both direction.
If display shows “OL” in both direction, the diode is open.
Continuity Check: Press the “FUNC” key to enter to the continuity
mode.
⑥
The buzzer sound if the resistance of a circuit under test is less than
30
Ω
.
5-4. Frequency measurement
1.
Set the rotary switch to “Hz” position.
2.
Insert the red test lead into the “
V
Ω
Hz”
input terminal and the
black test lead into the “
COM”
terminal.
3.
Connect the test leads across with the circuit under testing. The
measured value shown.
on the LCD display.
5-5. DC/AC
µ
A or mA measurement
DC Current range is 400.0
µ
A/4000
µ
A and 40.00mA,/400.0mA and
then 10A range.
AC Current range is 400.0
µ
A/4000
µ
A and 40.00mA,/400.0mA and
then 10A range.
1.
Turn off power to the circuit. Set the rotary switch to the proper
DC/AC
µ
A or DC/AC mA position.
2.
Break the current path to be tested. Connect the red test lead to the
more positive side of the break and the black test lead to the more
negative side of the break.
3.
Turn on power to the circuit. The measured value show on the display.
