Diode Test; Frequency Measurement; Duty Cycle Measurements; Capacitance Measurement - Extech Instruments 380926 User Manual

Diode Test

1. Set the Function switch to the diode
2. Press the FUNC key until the
3. Insert the black test lead to the COM input jack and the red test lead to the
jack.
4. Connect the test lead tips to the diode. A typical diode forward voltage drop will
indicate 0.3 to 0.7V. The reverse drop will indicate "OL", indicating high impedance.
Proper diode check should include both forward and reverse tests.

Frequency Measurement

1. Set the Function switch to the Hz position.
2. Press the FUNC key until the "Hz" symbol appears on the LCD.
3. Insert the black test lead to the COM input jack and the red test
lead to the Hz input jack.
4. Connect the tips of the test leads to the device to be measured
(see diagram).
5. Read the frequency value in Hz on the LCD.

Duty Cycle Measurements

Follow the steps as for Frequency measurements with the following exception: Press the
"Hz/%" key until the "%" symbol appears on the display.

Capacitance Measurement

1. Set the Function switch to the
2. Press the FUNC key until the "nF" symbol appears on the LCD.
3. Insert the black test lead to the COM input jack and the red test
lead to the red input terminal.
4. Connect the tips of the test leads to the device to be measured
(see diagram).
5. Read the capacitance value on the display.
NOTE: When making very low capacitance measurements, use the
REL function to zero any stray capacitance.
symbol appears on the LCD.
RED BLACK
FORWARD TEST
position.
6
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position.
BLACK RED
REVERSE TEST
input
380926 4.1 07/07