Keysight Technologies U1253B - Measuring AC and DC Signals

2 Making Measurements
56 Keysight U1253B User’s and Service Guide
Measuring AC and DC Signals
Your multimeter is capable of displaying both AC and DC signal components,
voltage or current, as two separate readings or one AC+DC (rms) value combined.
1 Set up your multimeter according to your desired measurement. Set the rotary
switch to:
i For voltage measurements: or .
ii For current measurements: or .
2 Press the key twice to cycle the measurement function to the AC+DC
mode ( ). Probe the test points and read the display.
For better accuracy when measuring the DC offset of an AC voltage, measure the
AC voltage first. Note the AC voltage range, then manually select a DC voltage
range equal to or higher than the AC range. This procedure improves the accuracy
of the DC measurement by ensuring that the input protection circuits are not activated.
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NOTE
– Press to cycle through the available dual display combinations.
– Press to enable the frequency test mode for voltage measurements.
See “Frequency Counter” on page 62 to learn more.
Exit
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