Keysight Technologies 3458A Guide D'utilisation page 98

3 Configuring for Measurements
Configuring for AC Measurements
This section describes how to configure the multimeter for making AC or AC+DC
voltage, AC or AC+DC current, frequency, or period measurements.
AC or AC+DC voltage
The multimeter can make true RMS AC voltage or AC+DC voltage measurements
using one of three methods: analog RMS conversion, random sampling
conversion, or synchronous sampling conversion. Each measurement method has
six ranges: 10 mV, 100 mV, 1 V, 10 V, 100 V and 1000 V, and a maximum resolution
of 6½ digits on any range.
Table 3-7
each measurement method.
all types of voltage measurements.
For AC voltage measurements, the multimeter measures only the AC component
of the input signal. For AC+DC voltage measurements, the multimeter measures
the DC component and the AC component within the frequency ranges shown in
Table
for example, any AC components below 10 Hz are not included in the
measurement.
When taking measurements on the 10 mV and 100 mV ranges using any AC
NOTE
measurement method, it is possible for radiated noise (such as transients caused
large motors turning on and off) to cause inaccurate readings. For accurate
readings on these ranges, ensure that your nearby environment is electrically
"quiet" and use shielded test leads.
98
shows the measurement characteristics and signal requirements for
3-7. Notice that when measuring AC+DC voltage using the analog method,
Figure 3-1 shows the front terminal connections for
Keysight 3458A User's Guide