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2
Making Measurements
Performing Capacitance Measurement
Disconnect circuit power and discharge all high-voltage capacitors before
CAUTION
measuring capacitance to avoid damaging the clamp meter or the device
under test. To confirm that a capacitor has fully discharged, use the DC
voltage function.
The U1211A, U1212A, and U1213A Clamp Meter measures capacitance by
charging a capacitor with a known current for a period of time, and then
measuring the voltage.
Measuring tips:
NOTE
– For measuring capacitance greater than 4000 µF, discharge the capacitor
– Ensure correct polarity when measuring polarized capacitors.
– For measuring small capacitance values, press
Steps (see
1 Set the rotary switch to
2 Press Shift to select capacitance measurement.
3 Connect the red and black test leads to input terminals
4 Probe the test points and read the display.
46
and manually select a suitable measurement range. This will speed up
measuring time in order to obtain the correct capacitance value.
open to subtract the residual capacitance of the clamp meter and leads.
Figure 2-7
on page 47):
(black) respectively.
Keysight U1211A, U1212A, and U1213A User's and Service Guide
.
with the test leads
(red) and COM
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