Diode Test; Continuity Check - koban KMD 02 Manual Del Usuario

KMD 02
Digital multimeter
Some tips for measuring resistance:
• The measured value of a resistor
in a circuit is often different from
the resistor's rated value. This is
because the Meter's test current
flows through all possible paths
between the probe tips.
• In order to ensure the best
accuracy in measurement of low
resistance, short the test leads
before measurement and memory
the test probe resistance in mind.
This necessary to subtract for the
resistance of the test leads.
• On 20MΩ and 200MΩ ranges, the
meter may take a few seconds to
stabilize reading. This is normal for
high resistance measuring.
• When the input is not connected,
i.e. at open circuit, the figure "1"
will be displayed for the over range
condition.

Diode test

Warning
To avoid electrical shock and/
or damage to the instrument,
disconnect circuit power and
discharge all high-voltage
capacitors before testing diodes.
Use the diode test to check diodes,
and other semi- conductor devices.
The diode test sends a current
through the semiconductor junction,
and then measures the voltage drop
Instructions manual | 32
across the junction; a good silicon
junction drops between
0.5V and 0.8V.
To test a diode out of a circuit:
1. Set rotary switch to
2. Connect the black and red test
leads to the COM and
respectively.
3. For forward-bias readings on
any semiconductor component,
place the red test lead on the
componenfs anode and place the
black test lead on the component's
cathode.
4. The meter will show the approx.
forward voltage of the diode. If the
test lead connection is reversed,
only figure "1" displayed.
In a circuit, a good diode should still
produce a forward bias reading of
0.5V to 0.8V; however, the reverse-
bias reading can vary depending
on the resistance of other pathways
between the probe tips.

Continuity check

Warning
To avoid electrical shock and/
or damage to the instrument,
disconnect circuit power and
discharge all high-voltage
capacitors before testing for
Continuity.
Continuity is a complete path for
current flow.
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