Capacitance Measurements - Extech Instruments MA160 User Manual

Capacitance Measurements
WARNING: To avoid electric shock, remove power to the circuit under test and discharge
the capacitor under test before measuring. Do not test on circuits or devices where 60VDC or
30VAC is present.
1. Set the function switch to the
2. Insert the black test lead banana plug into the negative COM jack
and the red test lead banana plug into the positive
3. Press the M button to select the unit of measure symbol F.
4. Touch the test probe tips across the part under test.
5. For small capacitance values, use the Relative mode to remove test lead and probe
capacitance.
6. Read the capacitance value in the display.
7. The display will indicate the proper decimal point and value.
Capacitance Measurement Notes:
 The display will show "OL" if a capacitor is short circuited or if the measured capacitance >
maximum range of the instrument.
 Capacitance measurements > 600μF may require several seconds to obtain a stable
reading.
 In order to ensure measurement accuracy, discharge residual charges before measuring
capacitance; Use maximum safety when working with high voltage capacitors to prevent
damage to the instrument and risk to personal safety.
 Disconnect test leads and circuit under test after measurements are completed.
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Fig 4‐7 CAPACITANCE MEASUREMENTS
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