Capacitance Measurements - Extech Instruments EX503 User Manual

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
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 )
4V
40V, 400V
1000V/1000V
400mA
10A
Sensitivity
≥1.5V rms
≥10V rms
≥20V rms
≥420V rms
≥45mA rms
≥4A rms
9
position.
Frequency width
5Hz~10kHz
5Hz~20kHz
5Hz~200kHz
50Hz~1kHz
5Hz~5kHz
5Hz~1kHz
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