Extech Instruments Extech 470 Guide de l'utilisateur télécharger pdf (Page 11)

EX470-EU-EN-V5.4-5/12

CAPACITANCE MEASUREMENTS

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.

1. Set the rotary function switch to the green position.

2. Insert the black test lead banana plug into the negative (COM) jack.

Insert the red test lead banana plug into the positive jack.

3. Touch the test leads to the capacitor to be tested.

4. Read the capacitance value in the display

FREQUENCY MEASUREMENTS

1. Set the rotary function switch to the green “Hz” position.

2. Insert the black lead banana plug into the negative COM jack and the

red test lead banana plug into the positive Hz jack.

3. Touch the test probe tips to the circuit under test.

4. Read the frequency on the display.

% DUTY CYCLE

1. Set the rotary function switch to the “Hz” position.

2. Insert the black lead banana plug into the negative COM jack and the

red test lead banana plug into the positive Hz jack.

3. Press the SELECT key momentarily to select “%” in the display.

4. Touch the test probe tips to the circuit under test.

5. Read the % duty cycle on the display.

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Extech Instruments Extech 470 Guide de l'utilisateur Page 11