34411A AGILENT TECHNOLOGIES, 34411A Datasheet - Page 4

• Manufacturer Part Number: 34411A
• Description: MULTIMETER, DIGITAL, BENCH, 6-1/2 DIGIT
• Manufacturer: AGILENT TECHNOLOGIES

Specifications of 34411A

• Dmm Type: Bench
• Voltage Measuring Range Dc: 100mV To 1000V
• Voltage Measuring Range Ac: 100mV To 750V
• Current Measuring Range Dc: 100µA To 3A
• Current Measuring Range Ac: 100µA To 3A
• Lead Free Status / RoHS Status: na

Applications and Solutions
Whether your application
requires general-purpose
measurements, precision
DC and AC measurements,
waveform capture of mechanical-
electrical signals, or fast
throughput and programming
speed, these new DMMs have
the measurement capability
you need. This section gives
you examples that demonstrate
some of the newer capabilities
not found in many general-
purpose DMMs. The next
section, “Understanding Fast
Measurements,” will show
you how to configure your
DMM for these measurements.
Precision measurements
with high NMR
The 34410A and 34411A use
a special aperture-shaping
algorithm to increase normal
mode rejection (NMR) of
power-line-related noise in
DC measurements. It is an
increasing and decreasing
series of weighted averages
of multiple measurements.
This special algorithm is
utilized on NPLC settings of
2, 10, and 100. At 1 PLC, the
NMR is specified as 55 dB,
but at 2 PLC, the rejection
leaps to 110 dB at ±0.1% of
the power line frequency.
Most DMMs provide only
60 dB of rejection at 10 and
100 NPLC settings and ±0.1% of
deviation from line frequency.
However, the shaped aperture
algorithm creates a wider notch
of operating frequency and
achieves 75 dB at ±1% and 55 dB
at ±3%. This allows higher-
precision measurements at
faster rates than is available
from most other DMMs on
the market.
Precision capacitance
measurements
When you are designing circuits,
it is highly advantageous to
know the actual value of a
capacitor to be used in a circuit.
Hand-held multimeters and
most 5
typically use a measurement
technique that assumes an ideal
capacitor being charged by an
ideal constant current source
to determine capacitance with
the formula C = I/(dV/dt). These
instruments then specify an
error of 1% or more for film
capacitors (polyester and
polypropylene dielectrics)
but do not specify errors for
capacitors of other dielectrics.
1
/
2
digit multimeters
4
Real-world capacitors exhibit
non-ideal behavior due to
dielectric absorption, leakage,
dissipation factor, and nonlinear
equivalent series resistance
(ESR). Current sources are not
ideal either, so a substantial
amount of error can be intro-
duced using this time-domain,
straight-line approximation
technique.
The 34410A and 34411A
use a patented, time-domain
algorithm to reject some of the
non-ideal performance charac-
teristics of capacitors. First
and foremost, the A-to-D is
able to sample fast enough to
capture multiple points on the
charge ramp of the capacitor
under test without introducing
significant noise to the mea-
surement. Second, the constant
current source does not have
substantial non-ideal behaviors
such as a thermal tail when
turning on. Third, the internal