9
MEASURING CIRCUIT SWITCHING
•
If resistance between two terminals
measured is higher than 100Ω, it shall
be deemed as open circuit and the
buzzer will not sound.
•
If the resistance between the two
terminals measured is lower than
10Ω, it shall be deemed as sound
conductivity of a circuit and the buzzer
will produce a constant sound.
Caution
•
While inspecting in-circuit circuit
switching, it is necessary to cut off the
power supply to the circuit under test
and discharge residual electric charge
in the capacitor before measuring.
•
Do not input voltage higher than DC
30V or AC 30V to prevent personal
injury.
DIODE TEST
•
The range of test voltage for diode is
about 0-3V.
•
The auxiliary display shows “diod”.
Caution
•
If the diode under test is in open circuit
or reverse polarity, it will display “OL”.
In terms of silicon PN junction, 500-
800mV shall be generally confirmed as
normal value.
•
When measuring in-circuit mode, it is
necessary to cut off all the power to
the circuit under test and discharge
residual electric charge in the capacitor
before measuring.
•
Do not input voltage higher than DC
30V or AC 30V in order to prevent
personal injury.
MEASURING CAPACITANCE
•
When there is no input, the instrument will display a fixed reading, which is the
inherent capacitance of the instrument.
•
When measuring capacitance in small-range gear, the inherent value must be
deducted from the measured value to guarantee precise measurements.
•
Therefore it is allowed to utilize the function of Relative Measuring of the