Keysight Technologies 3458A Guide D'utilisation page 87

Configuring for Measurements 3
Figure 3-1 Voltage measurement connections
DC current
The multimeter measures current by placing an internal shunt resistor across the
input terminals, measuring the voltage across the resistor, and calculating the
current (current = voltage/resistance). The multimeter's front and rear current
inputs are protected by 1 A, 250 V fuses. Figure 3-2 shows the front terminal
connections for all types of current measurements.
The multimeter measures DC current on any of eight ranges. Table 3-5 shows
each DC current range and its full-scale reading (the full scale reading also shows
the maximum number of digits for each range). Table 3-5 also shows the
maximum resolution and the shunt resistor used for each range. (Resolution is a
function of the specified integration time: refer to Setting the integration time
later in the section for more information.) You specify DC current measurements
using the DCI command. For example, to specify DC current measurements on the
10 µA range, send:
OUTPUT 722;"DCI 10E-6"
Keysight 3458A User's Guide 87