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Using Z
for Voltage Measurements (U1242C only)
LOW
Do not use the Z
CAUTION
damaged by this function's low impedance (
The low input impedance (Z
impedance across the leads to obtain a more accurate measurement.
Table 2-5
To set up your multimeter to make a Z
multimeter to measure voltage as shown in Figure 2-2 or Figure 2-5. Probe the
test points and read the display.
The AC voltage measurement is shown in the primary display and the DC
NOTE
voltage measurement is shown in the secondary display.
Use the low input impedance (Z
NOTE
voltages from your measurements.
Stray (ghost) voltages are voltages present on a circuit that should not be
energized. Stray voltages can be caused by capacitive coupling between
energized wiring and adjacent unused wiring.
Z
LOW
coupling voltage. Use Z
where the presence of stray voltages are suspected.
You can also use Z
residual-current circuit breaker (RCCB). Z
probes touching on terminals after the RCD or RCCB is tripped. This will prevent
false readings in voltage measurements with high-input impedance after a
power off or trip.
Keysight U1241C/U1242C User's Guide
function to measure voltages in circuits that could be
LOW
Rotary switch position allowing Z
Legend
Defaul t function
Z
LOW
Z
(AC/DC) V
LOW
can remove stray voltages from your measurements by dissipating the
LOW
for tripping a residual-current device (RCD) or a
LOW
1.8
) function in your multimeter presents a low
LOW
voltage measurement, first set up your
LOW
) function to remove stray or induced
LOW
to reduce the possibility of false readings in areas
can discharge stray voltages from
LOW
Making Measurements
kΩ (nominal)).
measurements
LOW
2
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