Skip to main content
RISE logo

DSWM - Sampling Wattmeter

We are pleased to be able to provide for purchase our top-of-the-line power measuring system for power quality. Either as a complete system or as parts of a system. We can also provide advice or knowledge transfer. Please feel free to contact RISE Measurement Technology for further information.

Cause

Who needs a DSWM?

Accurate measurements of power and related quantities is required in many situations:

  • Verification of power quality calibrators and analyzers.
  • Verification of power and energy reference equipment.
  • In standards laboratories to ensure measurement techniques and equipment meet appropriate standards.

Complete DSWM systems are now being used at Fluke as a primary reference for the Fluke 6100A Electrical Power Standard and also at national standards laboratories such as A*STAR in Singapore and the Czech metrology institute, CMI. Our current shunts and voltage dividers are being used in more than fifteen laboratories around the world.

Characteristics

The DSWM is a primary reference for electrical power and related quantities.

  • Voltage, current, power, impedance, harmonics 
  • Flicker and other modulation measurements  
  • 50 ppm accuracy
  • 50 mV … 1000 V
  • 5 mA … 100 A
  • 15 Hz … 5 kHz 
  • Flexible & easy to use

To the right are links to more technical information, such as technical specifications, international publications and results from international comparisons.

Background

In 1999 a co-worker of RISE published a doctoral thesis - Power measurement techniques for non-sinusoidal conditions. One result of this work was the development of a Digital Sampling Watt Meter, DSWM.

This has enabled the better treatment of harmonics when measuring electrical power and other AC quantities, as well as the establishment of an improved national reference for electrical power in Sweden.

Over the years, the DSWM has been improved and supplied with state of the art voltage dividers and coaxial current shunts of RISE-design.

Looking forward

In our modern society, electric energy and electricity network systems are of vital importance. Future development will include small scale production such as at windmills and with solar power and there is much discussion about smart grids and the next generation of cars will be hybrid vehicles with batteries which must be“fuelled” by the electricity network. As a result, electricity will increase in importance and with it the importance of traceable measurements of electrical power and energy.

The DSWM developed at RISE has proven to be versatile and is widely adopted for the emerging electricity market.

Method

Phase-locking to the signal to be measured, highly accurate sampling devices

Deliveries

We deliver complete systems or parts like our high-precision, coaxial voltage dividers and current shunts.

Ordering

Please contact one of the persons listed on this page, to order or to ask for more information.

Facts

Service

DSWM - a Digital Multifunctional Sampling WattMeter standard

Instrument

Power meters

Metrology Area

Electricity

Innovation area

Energy, Calibration and control, Generic metrology and measurement technology

Price

Price on tender

Preparations

No preparation needed

Contact person

Stefan Svensson

Forskare

+46 10 516 54 15
stefan.svensson@ri.se

Read more about Stefan

Contact person

Karl-Erik Rydler

Senior Forskare

+46 10 516 54 01
karl-erik.rydler@ri.se

Read more about Karl-Erik

Related

Service

Calibration of electric power quality instruments

We can offer calibrations for electric power quality parameters such as voltage, current and power for non-sinusoidal signals. Continuous calibration at RISE lays the foundation for quality-assured measurements.
Service

Coordinating your calibration needs

<p>RISE has a coordinator function for all customer with issues related to calibration. Through this service we can more easily make our range of calibration services available so that you as a customer can have a single ent…
Test & demo

High Voltage Laboraty

Internationally unique. Strong personnel group comprising both world-renowned researchers and experienced technicians guarantees competence, flexibility and capacity.
Service

Calibration high voltage & current measuring equipment (National Lab)

The mission for RISE's High voltage group is to provide state-of-the-art calibrations of measuring equipment used in high voltage and high current testing. Within the high voltage area we have resources for DC and AC line fre…
Service

Calibration of electrical power at The National Laboratory

Power meters, watt meters and converters (transducers) measure the electrical power and are available both as single and multi-phase. Calibration of a power meter or watt meter ensures that the error of the dsiplayed measurement v…
Expertise

The National Laboratory for Power and Energy

RISE is Sweden's NMI (National Metrology Institute) and is, according to the Swedish constitution, responsible for the central measurement quantities in the International System of Units, SI.