18
In the circuit, the normal diode should produce a forward voltage drop of 0.5V to 0.8V; however,
the reverse bias reading will depend on the change in resistance of the other
4.11 Buzzer On/Off Test
Warning
Risk of electric shock.
To avoid damage to the meter or the device under test, all power to the circuit
under test should be cut off and all high voltage capacitors should be fully
discharged before the beep on-off test.
On-off test:
1) Press button, enter to the
test status.
2) Insert the black test lead into the COM jack
，
and the red test lead into the Jack.
3) Connect the other end of the red and black test leads to the resistance of the circuit under
test. If the resistance of the circuit under test is less than 50Ω the buzzer inside the meter may
sound. When the built-in buzzer sounds and the indicator lights, when the measured resistance
is about 40
~60
, only the rightmost two indicator lights; when the measured resistance is less
than 10
，
the buzzer will beep, and all lights will be lit.
Note
：
If the test leads are open or the measured line resistance is greater than 600
，
the display
shows "0L".
4.12 Capacitance measurement
Risk of electric shock.
To avoid damage to the instrument or equipment under test, all
power supplies of the circuit under test and all high voltage
capacitors should be fully discharged before measuring the
capacitance. Use the DC voltage file to determine that the
capacitors have been discharged.
1) Insert the red and black test leads to COM and the jack. Press
Enter to capacitance mode
2) After the capacitor is completely discharged, the other end of the black test pen is connected
to the measured capacitance. And the measured capacitance value is read by LCD
Note:
1) To improve the accuracy of measurements below 10nF, subtract the distribution
capacitance of the meter and leads.
2) When measuring large capacitance, stable reading takes a certain amount of time.
3) When measuring polar capacitor, pay attention to the corresponding polarity to avoid
