User manual

EX503-EU_ENG V2.1 11/07 9

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 Ω CAP position.

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

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

3. Press the MODE button to indicate “nF” on the display.

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

5. The test may take up to 3 minutes or more for large capacitors to

charge. Wait until the readings settle before ending the test.

6. Read the capacitance value in the display

FREQUENCY/DUTY CYCLE MEASUREMENTS (ELECTRONIC)

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

2. Press the Hz/% button to indicate “Hz” in the display.

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

red test lead banana plug into the positive Hz jack.

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

5. Read the frequency on the display.

6. Press the Hz/% button again to indicate “%” on the display.

7. Read the % of duty cycle on the display.

FREQUENCY SENSITIVITY (ELECTRICAL)

The frequency sensitivity is range dependent when the Hz function is selected while in the

voltage or current measuring mode. Below are typical sensitivities for the “electrical”

measurement modes.

Range

( DC/AC )

Sensitivity Frequency width

≥ 1.5V rms

5Hz~10kHz

≥ 10V rms

5Hz~20kHz

40V, 400V

≥ 20V rms

5Hz~200kHz

1000V/1000V

≥ 420V rms

50Hz~1kHz

400mA

≥ 45mA rms

5Hz~5kHz

10A

≥ 4A rms

5Hz~1kHz