Atec Agilent-34461A - Manual (Page 5)

5
What Truevolt technology means to you:
You can measure your real-world signals,
not instrument error
Noise and injected current: Agilent 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 µA to 10 A. We have also added a tem-
perature measurement function (RTD/PT100, 5 kΩ 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.
Measure with unquestioned Truevolt confi dence
You can measure your real-world signals with confi dence
All Truevolt DMM specifi cations 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 specifi cations.
of your
Many lo
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 Agilent 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 Agilent.
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 fl ows 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 infi nitely poorer performance
(some are too noisy to measure).