1. The LCD displays
'
OL
'
when the resistance is over the selected range. When measuring a value over
1M
Ω
, the reading will take a few seconds to become stable. This is normal for high resistance
measuring.
2. When the input lead is in an open circuit, overload displays
'
OL
'.
3. When measuring in-circuit resistors, be sure that the power is off and all capacitors are completely
discharged.
4. Never input any voltage while the meter is set for resistance range!
4-7. Capacitance measurement
1. Discharge any capacitor to be tested by shorting the terminals of the capacitor with an insulated
device.
2. Turn the selector knob to
'
'
range.
3. Insert the black lest lead into the
'
COM
'
terminal and the red lead into the
'
V/
Ω
/Hz
'
terminal.
4. If the LCD doesn’t display 0, press the REL button to clear the reading;
5. Place the test leads in parallel with the capacitor being tested. The red test lead is for the positive
pole. The LCD displays the capacitance value.
Note:
1.
Never input voltage or current to the
'
V
Ω
Hz
'
terminal when measuring capacitance.
2.
In order to assure an accurate reading, press the REL button to clear the reading before testing.
3. There is only an auto range mode for testing capacitors.
4. The capacitors must be complete discharged before testing to protect the meter.
5. A reading over the 400uF range will delay 15 seconds.
4-8. Frequency measurement
1. Insert the black lest lead into the
'
COM
'
terminal and the red one into the
'
V/
Ω
/Hz
'
terminal.
2. Turn the selector knob to the Hz range.
3. Place the test leads to the power source or the load which is to be tested.
4. Press the Hz/DUTY key to switch frequency/duty cycle, it will display the frequency or duty cycle
of the signal source which is tested.
Note:
1. There is only an auto range mode under the frequency mode.
2. The meter can still work if the input is higher than 10Vrms, but the accuracy is not guaranteed.
3. In a noise environment, you should use shielded cable to measure a low signal.
4. When measuring high voltage circuits, no part of your body should touch the high voltage circuit.
5. Never input a voltage higher than 250VDC or AC peak value, or it may damage the meter.
4-9. Diode performance test:
1. Insert the black test lead into the
'
COM
'
terminal and the red one into the
'
V/
Ω
/Hz
'
terminal (the
polarity of the red lead is
'
+
'
).
2. Turn the selector knob to
range, press the SELECT key to select the measurement mode.
Connect the test leads to the diode being tested, the red test lead connects to the diode positive polarity,
the black test lead to the diode cathode polarity, the reading is the approximate value of the diode’s
forward voltage drop.
3. With the red test connected to the diode cathode polarity and the black test lead to the diode positive
polarity, the LCD will display
'
OL
'
.
4. This will complete diode testing including forward and backward measurement, if the desired result
isn’t met by performing the above tests, it means the diode is bad.
