Keysight Technologies U1273A Guide De L'utilisateur page 68

2 Making Measurements
The AC voltage measurement is shown in the primary display and the DC
NOTE
voltage measurement is shown in the secondary display. Press
the AC and DC voltage indication on the primary and secondary displays.
Use the Z
NOTE
voltages from your measurements
Ghost voltages are voltages present on a circuit that should not be energized.
Ghost voltages can be caused by capacitive coupling between energized wiring
and adjacent unused wiring. The Z
your measurements by dissipating the coupling voltage. Use the Z
to reduce the possibility of false readings in areas where the presence of ghost
voltages are suspected.
Figure 2-12
During Z
NOTE
is set to 1000 V in the manual ranging mode. The analog bar graph represents
the AC+DC voltage value combined.
68
(low input impedance) function to remove ghost or ind uced
LOW
Z display
LOW
measurements, autoranging is disabled and the multimeter's range
LOW
function can remove ghost voltages from
LOW
Keysight U1273A/U1273AX User's Guide
to exchange
Dual
Exit
function
LOW