Datasheet

5
Noise and injected current: Keysight Truevolt DMMs contribute
less than 30% of the injected current than alternatives. Compared
to some lower cost alternatives, Truevolt DMMs offer almost 100%
less noise.
You can take advantage of expanded measurement functionality
Compared to the 34401A DMM, Truevolt DMMs offer expanded
current ranges from 100 A to 10 A. We have also added a
temperature measurement function (RTD/PT100, 5 k thermistor).
Additionally, diode measurement capability has been expanded to
allow a larger full-scale voltage to be measured (5 V) to enable the
measurement of more diode types such as LEDs.

Peak value
RMS value
AC measurement
accuracy is
degraded when
signals have energy
contained in higher
frequencies than a
typical sine wave.
Crest factor: the ratio of the
peak value to the RMS value
of a waveform
Digital AC rms measurements: For meters in this class, only
Keysight uses digital direct sampling techniques to make AC rms
measurements. This results in a true rms calculation technique
that avoids the slower response of analog RMS converters used
in all other vendor’s 6½ digit DMMs. This allows for crest factors
up to 10 without additional error terms. This is a unique, patented
technique – only used by Keysight.
Truevolt
60
50
40
30
20
10
0
Brand A Brand B Brand C
Input
bias
current
too
noisy
to
measure
pA
Truevolt
800
700
600
500
400
nA
300
200
100
0
Brand A Brand B Brand C
Input bias current: Ideally, no current flows into the measurement
terminals of your DMM. In real measurement situations, there are
always input currents creating additional measurement errors.
Truevolt DMMs take care of input bias current. Some alternative
DMMs offer 20% to infinitely poorer performance (some are too
noisy to measure).
You can measure your real-world signals, not instrument error 
What Truevolt technology means to you:
All Truevolt DMM specifications are tested and guaranteed for
compliance with ISO/IEC 17025 standards so you can prove the
effectiveness of your lab or production line’s quality
management system. Many lower-cost DMMs in this
class do not carry a guarantee of their
measurement specifications.