Figure 2. U1272A helps you identify the presence of stray voltage on a disconnected wire running parallel with the wire powering up the

VFD to an industrial motor. The image on the right shows the U1272A in low impedance mode.

Low impedance mode

Stray voltages are usually found in non-

energized electrical wiring adjacent to

powered wires due to capacitive or induc-

tive coupling between these wires. The low

impedance mode serves to eliminate false

readings by dissipating these stray voltag-

es thus improves safety and measurement

efficiency during voltage measurement.

Peak detect at 250 µs

The peak detect function allows you to

capture the engine or motor startup tran-

sient as fast as 250 µs.

Key Functions

4 | Keysight | U1270 Series Handheld Digital Multimeters - Data Sheet