50 U1253B User’s and Service Guide
2 Making Measurements
Measuring Capacitance
The U1253B true RMS OLED multimeter calculates capacitance
by charging a capacitor with a known current for a period of
time, and then measuring the voltage
Measuring tips:
• For measuring capacitance values greater than 10000 μF,
discharge the capacitor first, then select a suitable range
for measurement. This will speed up the measurement
time and also ensure that the correct capacitance value is
obtained.
• For measuring small capacitance values, press with
the test leads open to subtract the residual capacitance of
the multimeter and leads.
1 Set the rotary switch to .
2 Connect the red and black test leads to input terminals
(red) and COM (black) respectively.
3 Use the red test lead on the positive terminal of the
capacitor and the black test lead on the negative terminal.
4 Read the display.
Disconnect circuit power and discharge all high-voltage capacitors
before measuring capacitance to avoid damaging the multimeter or the
device under test. To confirm that a capacitor has fully discharged, use
the DC voltage function.
means that the capacitor is charging. means that the capacitor is
discharging.
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