04 | Keysight | IntegraVision PA2200 Series Power Analyzers - Data Sheet
Speciꢀc time-period
measurement
Measuring power:
Power analyzer or oscilloscope?
The Keysight IntegraVision power
analyzer supports the capture of
voltage, current and power waveforms
over specific periods of time, with
measurements made based on cursors
placed on the captured waveforms.
This is particularly useful for examining
transient phenomena and in the design
of periodically controlled equipment.
To ensure that your DUT complies with
energy standards, for instance, it is
vital to measure power consumption
across a range of different modes
from sleep to full activity – and all the
transient states in between.
Engineers working on electronic power conversion systems need high-
accuracy measurements to identify and characterize incremental efficiency
improvements in devices such as power inverters or converters, uninterruptible
power supplies, battery management systems, vehicle and aircraft power
systems, lighting systems/electronic ballasts and appliances. While some
of today’s power analyzers offer adequate measurement accuracy, they are
cumbersome to use and lack the ability to characterize power consumption
under dynamic conditions. Previously, engineers needed a power analyzer to
make accurate measurements and an oscilloscope to visualize repetitive and
single-shot events such as turn-on and occurrences of transients. Eliminating
a separate oscilloscope in the measurement setup decreases test complexity
and reduces configuration time.
Precision power analyzers offer high accuracy and ease of connection to the
DUT, making them ideal for steady-state measurements of power consumption,
efficiency and power quality. For these measurements, the accuracy of the
power analyzer gives R&D engineers the measurement integrity they need.
With floating inputs and directly connected measurements, precision power
analyzers make it easy for engineers to connect to their DUTs.
Capturing sudden or irregular
phenomena
Abnormal phenomena can often be
hard to isolate, disappearing from
the screen almost as soon as they
appear. Like a traditional oscilloscope,
the Keysight IntegraVision power
analyzer can be setup to make
single-shot measurements to capture
and measure transient phenomena,
including in-rush, cycle dropouts,
blackouts/brownouts, and other line
disturbances.
Traditionally, only oscilloscopes offer the single-shot measurement capability
necessary for dynamic measurements during functional test. Furthermore, by
offering a visual picture of what is happening, oscilloscopes allow engineers
to gain insight into their DUTs and to identify issues. However, their lower
accuracy means that making critical efficiency measurements on high-
efficiency converters may not be possible. Because oscilloscopes have
ground-referenced, non-isolated front ends, probes are required for floating
and current measurements. Probes further reduce measurement accuracy and
make oscilloscopes harder to connect to the DUT for high-accuracy, power-
related measurements.
Continuous Whole-Cycle
Analysis
R&D engineers, therefore, are forced to switch between these two instruments
depending on the type of measurement they need to make: They use a
power analyzer to make accurate measurements and an oscilloscope to
visualize repetitive and single-shot events such as turn-on and occurrences
of transients. Switching between instruments is time consuming and makes it
difficult to get consistent, reproducible results.
Power analyzers use mathematical
transformations to analyze signals. For
precision, the measurement window
cannot have any discontinuities or
gaps. Continuous Whole-Cycle
Analysis (CWA) used by the PA2000
Series is a gapless measurement
technique that always performs
measurements on a positive integer
number of signal cycles.
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