Rohde & Schwarz NPA501-G 100 kHz, 50 µW – 12 kW Power Analyser

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Description

Rohde & Schwarz NPA501-G Power Analyser (With IEEE-488 (GPIB) interface)

In harmonic analysis, the R&S®NPA501-G power analyser graphically displays up to the 50th harmonic in a logarithmic amplitude scale. The user‑configurable, dual‑channel trend chart function for U, I, P, S, Q and F is unique in this class of instruments. The brilliant QVGA colour display (320 × 240 pixels) simultaneously displays up to 10 user‑configurable measurement results with a refresh rate of 10 measurements per second. The instrument has a basic accuracy of 0.05%. Signals are acquired from DC to 100 kHz at a sampling rate of 500 ksample/s. Current and voltage are displayed with 16-bit resolution. The logging function lets users store measured data with a timestamp in CSV format for a nearly unlimited period of time. Screen content can also be saved to a USB flash drive anytime at the push of a button. A PASS/FAIL function lets users monitor numerous measurement results

Key Features

Additionally has an IEEE-488 (GPIB) interface
Power measurement range: 50 µW to 12 kW
Analogue bandwidth: DC to 100 kHz
Sampling rate: 500 kSa/s
16-bit resolution for current and voltage
Basic accuracy: 0.05%
Voltage: 600V | Current: 20 A

Ports & Remote Control

Front: 4 mm safety sockets
Country-specific test adapters as accessories
USB port (virtual COM port, TMC)
Ethernet interface (LAN) with integrated web server
Remote control via SCPI-based commands
Driver packages for LabVIEW, LabWindows/CVI, IVI.net

Measurement Functions

Genuine consumption meter thanks to a hardware‑based integrator
Up to 26 different measurement and mathematical functions
Brilliant QVGA colour display (320 × 240 pixels)
Simultaneous display of up to 10 numerical measurement functions
User‑configurable measurement display
Graphical display modes for inrush, harmonic analysis, waveform and trend chart
Limit testing with PASS/FAIL indication for up to 6 limits selectable from 14 measurands (e.g. U, I, P, S, Q, F)
Rear: 4 BNC ports for analogue and digital inputs and outputs
Sensor input for a current probe or shunt

Applications

Switching Power Supply Design: Analysing inrush behaviour and efficiency at the component level.
Signal Quality Testing: Monitoring harmonic distortion and phase-angle control effects.
Automated Production: Using analogue outputs and digital I/O for hardware-level pass/fail sorting.

Product Images

Harmonic mode enables the computing of root mean square (RMS) values and phase angles for harmonics. The accompanying bar chart elegantly visualizes patterns for up to 50 voltage and/or current harmonics, while the tabular presentation has comprehensive insights into magnitude and phase values per harmonic. Users can also selectively display odd or even harmonics. The intuitive interface allows seamless navigation through the data, with cursors or a rotary knob so that users can focus on individual harmonics, highlighted in a distinctive yellow.

Harmonic Analysis Learn more...

Includes a BNC sensor input for external current probes/shunts and rear-panel BNC ports for analogue/digital I/O.

BNC + I/O Ports Learn more...

This graphical mode can plot up to two measured variables against time, similar to the roll mode in oscilloscopes. Primarily used observing longer time periods, it can accommodate 40 seconds to 80 minutes of data on the display. Decide on the plotting variables and adjust the time base, while the vertical trace scaling is done automatically. When operating, the numerical representations of maximum and minimum values are visible on the screen for enhanced analysis

Trend Chart Function Learn more...

Utilize a graphical representation to depict occurrences such as fast switch-on operation. This approach simplifies comprehension and helps compare the switching on and the steady-state operations of a device. The system can continuously record 8192 samples with durations of 16 milliseconds to 67 seconds. After a trigger event (similar to a single-shot capture on an oscilloscope), voltage and/or current are graphically plotted.

Inrush Measurement Learn more...

This function helps create a graphical representation of voltage, current, and/or power across a single waveform period, similar to the display format on an oscilloscope. The period is automatically determined by the R&S®NPA power analyser . An automatic hardware trigger initiates each acquisition and the waveform is continuously refreshed. Alongside waveform visualisation, the R&S®NPA furnishes numerical outputs for RMS voltage, RMS current and power, with softkeys for selecting displayed or concealed traces

Waveform Function Learn more...

Data Logging to CSV via USB Drive Learn more...

The integrator function serves a special purpose in unstable power measurements. The function is designed to compute and present the cumulative DUT power or energy consumption across a designated time span in both the active and standby states. Users can flexibly select their preferred acquisition mode, choosing between manual, time-based or event-based options. All R&S®NPA models deliver results in various formats, including positive, negative, and total watt-hours, with continuous updates in real time.

Real-Time Integrator Learn more...

Product Videos

Getting Started with the NPA Power Analyser

Exploring the key features of the R&S®NPA power analyser

Rohde & Schwarz NPA Power Meter | Fast Facts

Standard Hardware Accessories

UK Power Cord

Optional Hardware Accessories

New
R&S HZC50 AC/DC current probe
New
R&S HZC51 AC/DC current probe
New
R&S HZC95 19" rack adapter, 2HU, for R&S NGE100B/NGC100/NPA and HMC series
New
R&S NPA-Z2 mains adapter, UK version

Documentation

Application Note: MEASUREMENT OF STANDBY POWER CONSUMPTION IN LINE WITH IEC 62301 AND EN50564

Application Note: MEASURING INRUSH CURRENT

Application Note: MEASURING CONDUCTEDEMISSION LIMITS IN LINE WITH IEC/EN61000-3-2

Electrical specifications
Analogue bandwidth		DC to 100 kHz
Frequency accuracy		0.1 % of reading
Basic accuracy		0.05 % of reading
Sampling frequency		500 kHz
Input impedance		2 MΩ
Current measurement range		1 mA to 20 A
Voltage measurement range		1 mV to 600 V
Power measurement range	Depends on a combination of voltage and current ranges	50 µW to 12 kW
Display and interfaces
Display resolution		5 digits, 10 updates/s
Remote control interfaces: standard	All models	USB-TMC, USB-CDC (virtual COM), LAN
Remote control interfaces: optional	R&S®NPA501-G, R&S®NPA701-G	IEEE-488 (GPIB)
Display		320 × 240 pixel (QVGA-colour)
Special functions
Basic	All models	active power, apparent power, reactive power, lambda power factor, phase shift, frequency, voltage (RMS and average), current (RMS and average), total harmonic distortion, energy, data logging
Graphical	R&S®NPA501(-G), R&S®NPA701(-G)	trend chart mode, inrush mode, harmonics mode, waveform mode
Advanced	R&S®NPA501(-G), R&S®NPA701(-G)	limit testing, input for external probe and shunt, analogue input and output, digital input and output, minimum & maximum voltage, current and power
Compliance evaluation	R&S®NPA701(-G)	Standards: IEC62301, EN 50564, EN 61000-3-2
General data
Rated mains voltage and frequency range	AC	100 V to 115 V/230 V at 50 Hz to 60 Hz
Rated power		35 W (meas.)
Operating temperature range		+5 °C to +40 °C
Dimensions		222 mm × 97 mm × 291 mm (8.74 in × 3.82 in × 11.5 in)
Weight		approx. 3.25 kg (7.16 lb)

Comparison of Functional Ranges within NPA Series:

Function	Description	R&S®NPA101	R&S®NPA501	R&S®NPA701
P	Active power (W)	⬤	⬤	⬤
S	Apparent power (VA)	⬤	⬤	⬤
Q	Reactive power (VAR)	⬤	⬤	⬤
PF	Lambda power factor (λ)	⬤	⬤	⬤
PHI	Phase shift (φ)	⬤	⬤	⬤
FU	Voltage frequency value (Hz)	⬤	⬤	⬤
FI	Current frequency value (Hz)	⬤	⬤	⬤
FPLL	Acquisition frequency (Hz)	⬤	⬤	⬤
URMS	RMS voltage (U RMS)	⬤	⬤	⬤
UAVG	Average voltage (U AVG)	⬤	⬤	⬤
IRMS	RMS current (I RMS)	⬤	⬤	⬤
IAVG	Average current (I AVG)	⬤	⬤	⬤
UTHD	Total harmonic distortion U	⬤	⬤	⬤
ITHD	Total harmonic distortion I	⬤	⬤	⬤
WHM, WHP, WH, AHM, AHP, AH	Energy counter (integrator values)	⬤	⬤	⬤
Logging	Measured value logging (CSV)	⬤	⬤	⬤
UPPeak	Maximum voltage (U PEAK)		⬤	⬤
UMPeak	Minimum voltage (U PEAK)		⬤	⬤
IPPeak	Maximum current (I PEAK)		⬤	⬤
IMPeak	Minimum current (I PEAK)		⬤	⬤
PPPeak	Maximum power (P PEAK)		⬤	⬤
PMPeak	Minimum power (P PEAK)		⬤	⬤
Harmonics	Bargraph of up to 50 harmonics		⬤	⬤
Waveform	Waveform display (displays one period of voltage, current or power)		⬤	⬤
Trend chart	Current and voltage are displayed as a waveform		⬤	⬤
Inrush	Triggered display of waveform (single shot)		⬤	⬤
Limit / PASS/FAIL	Limit display		⬤	⬤
Sensor input	Input for current probe/external shunt		⬤	⬤
DIN/AIN	Digital/analogue inputs and outputs (BNC)		⬤	⬤
IEC 62301	Standby standard			⬤
EN 50564	Extended standby			⬤
EN 61000-3-2	Harmonic current for EMC, CE approval			⬤