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NOTE: If the measured resistance exceed the
maximum value for the selected range, the display
will show (1). Select the next range. To measure
resistance around 1M
Ω
or bigger, the instrument can
take some seconds to stabilize the reading. It is normal
to high resistance readings.
5.4 Diode Test
1. Connect the red test lead to the V
Ω
mA input terminal
and the black test lead to the COM input terminal.
2. Set the rotary switch to
position.
3. Connect the test leads to the diode. Normally, the
forward voltage of a silicon diode is between 0.4V and
0.9V. If the diode is damaged, the display will show
000 (short-circuit condition) or 1 (open condition).
4. Invert the connection of test leads. If the diode is
good, 1 must be displayed. If it is damaged, (short-
circuit or resistive), 000 or a near value will be displayed.
5.5 Continuity Test
1. Turn off all power of the circuit under test. Discharge
all capacitors of circuit. Any voltage present during
the continuity test will result in reading error and
can damage the instrument if the voltage exceed
overload protection limit. Set the rotary switch to
the
range position.