Keysight U1251B Guia Del Usuario página 70

2 Making Measurements
Measuring Capacitance
Disconnect the circuit power and discharge all the high-voltage capacitors
CAUTION
before measuring the capacitance to prevent any possible damage to the
meter or the device under test. To confirm that the capacitors have
discharged, use the DC voltage function.
The meter measures capacitance by charging the capacitor with a known current
for a period of time, measuring the voltage and then calculating the capacitance.
The larger the capacitor, the longer the charge time. Below are some tips for
measuring capacitance:
– For measuring capacitance values greater than 10,000 μF, discharge the
– For measuring smaller capacitance values, press
NOTE
Set up the multimeter as shown in
positive terminal of the capacitor and the black probe lead on the negative
terminal and read the display.
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capacitor first, then select a suitable range for the measurement. This will
speed up measuring time in order to obtain the correct capacitance value.
open to subtract any residual capacitance from the meter or the leads.
means the capacitor is charging. means the capacitor is discharging.
Figure 2-12. Use the red probe lead on the
Keysight U1251B and U1252B User's and Service Guide
with the test leads