Duratool D03128 Manuel - Page 15
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•
Take the reading on the LCD.
Note: If the duty cycle is less than 10%, the symbol "UL" will be displayed on the LCD.
If the duty cycle is more than 99.9%, the symbol "OL" will be displayed on the LCD.
•
The input signal frequency range is 10 - 10kHz. It is possible to test the duty cycle
of a frequency signal higher than 10kHz, but the tolerance of the test result can't
be ensured.
•
"
" means the maximum input voltage is 750V rms AC.
MEASURING RESISTANCE
•
Beware of electrocution.
•
When measuring in-circuit resistance, make sure that the power of the circuit
under test has been turned off and that all capacitors have been fully discharged.
Plug the black test lead into the COM jack and the red test
•
lead into the INPUT jack.
•
Set the rotary selector to the
the meter goes into 'Ω' range.
•
Connect the test leads to the ends of the resistor or circuit
for measurement.
•
Take the reading on the LCD.
Note: When the input is open, the "OL" will appear on the LCD to
indicate that the range has been exceeded.
•
For measuring resistance above 1MΩ, it may take a few
seconds to get a steady reading. This is normal for high
resistance reading.
TESTING DIODE
•
Plug the black test lead into the COM jack and the red test lead into the INPUT
jack.
•
Set the rotary selector to the
•
Press the "SEL" button to switch to
•
Connect the red test lead to the anode and the black test lead to the cathode of
the diode for testing.
•
Take the reading on the LCD.
Note: The meter will show the approximate forward voltage drop of the diode.
When the test leads have been reversed or opened, "OL" will appear on the LCD.
TESTING CONTINUITY
•
Beware of electrocution.
•
Make sure that the power of the circuit has been turned
off and the capacitors have been fully discharged before
testing the continuity of a circuit.
•
Plug the black test lead into the COM jack and the red test
lead into the INPUT jack.
•
Set the rotary selector to the
•
Press the "SEL" button to switch to
•
Connect the test leads to the two ends of the circuit for
WARNING
range position to ensure that
range position.
WARNING
range position.
15
test.
continuity test.