Capacitance Measurements; Frequency Measurements; Duty Cycle - Extech Instruments EX430A User Manual

CAPACITANCE MEASUREMENTS

1. Set the rotary function switch to the green
2. Insert the black test lead banana plug into the negative COM jack.
3. Touch the test leads to the capacitor to be tested.
4. Read the capacitance value in the display

FREQUENCY MEASUREMENTS

1.
2.
3.
4.

% DUTY CYCLE

1.
2.
3.
4.
5.
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WARNING: To avoid electric shock, disconnect power to the unit under test and discharge all
capacitors before taking any capacitance measurements. Remove the batteries and unplug the
line cords.
Insert the red test lead banana plug into the positive
Set the rotary function switch to the green "Hz" position.
Insert the black lead banana plug into the negative COM jack and the red test lead banana plug
into the positive Hz jack.
Touch the test probe tips to the circuit under test.
Read the frequency on the display.
Set the rotary function switch to the "Hz" position.
Insert the black lead banana plug into the negative COM jack and the red
test lead banana plug into the positive Hz jack.
Press the SELECT key momentarily to select % in the display.
Touch the test probe tips to the circuit under test.
Read the % duty cycle on the display.
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