De-skew correction enhances power measurements
15 September 2010
Test & Measurement
High-frequency power measurements can now be carried out with enhanced accuracy using a de-skew correction signal source, along with voltage and current probes, in conjunction with the /G4 power measurement option on the Yokogawa ranges of digital and mixed-signal oscilloscopes.
Even though power measurement using an oscilloscope is fundamentally less accurate than using a digital power meter, it offers much higher bandwidth and is particularly suitable for measuring high-frequency switching losses in switched-mode power supplies. It also provides power measurement capability using a general-purpose product which has other uses, an option that may be more acceptable to users who are not ready to invest in a true power meter or have limited budgets for test equipment. The de-skew correction signal source is an accessory which is specifically designed to maximise the measurement accuracy of oscilloscopes when they are used for power measurements involving fast switching devices and high-frequency waveforms.
To correctly measure power-supply parameters such as power, impedance, power factor, watt-hours and ampere-hours from the voltage and current under analysis, the voltage and current signals must be applied to the signal input terminals of the oscilloscope with no difference in the transfer time. The signal source corrects the potential delays between voltage and current channels in combination with the auto de-skewing function provided as part of the /G4 option.
The unit produces an output voltage from 0 to 5 V and an output current of 0-100 mA (for low-current measurements) or 0-1 A (for high-current measurements). It has a fall time of approximately 25 ns (low current) or 250 ns (high current). The fixed time difference between voltage and current is 2,3 0,5 ns (low current) or 14,5 ±1,0 ns (high current). Its power supply of 5 V d.c./100 mA is taken from the oscilloscope via a USB cable. The de-skew correction signal source supports through-type current transformers and a variety of clamp-on current probes.
For more information contact Trevor Grundlingh, Protea Electronics, +27 (0)11 719 5700, [email protected], www.protea.co.za
Further reading:
Compact high precision magnetometer
Future Electronics
Test & Measurement
Bosch Sensortec has introduced the BMM350, a compact 16-bit, 3-axis magnetometer engineered to deliver high accuracy, low noise, and exceptional energy efficiency in space constrained designs.
Read more...
Ultra compact NTC thermistors
RS South Africa
Test & Measurement
Murata Manufacturing Co. has expanded its compact NCU03 series of NTC thermistors with two ultra-small 0603M devices tailored for consumer and automotive designs.
Read more...
Omniflex uses LoRaWAN to track water usage
Omniflex Remote Monitoring Specialists
Test & Measurement
Omniflex has helped New South Wales Ports improve its ability to track water usage by installing remote monitoring to 38 water meters at its Port Kembla site, sending the data to the NSWPorts web portal.
Read more...
Surviving the extremes: Understanding shock and vibration in MEMS sensors
Altron Arrow
Editor's Choice Test & Measurement
By considering factors such as mechanical headroom, damping, and system-level robustness, designers can ensure that the chosen sensor not only survives, but performs reliably over time.
Read more...
Advanced pressure monitoring sensor
EBV Electrolink
Test & Measurement
The Infineon KP497 is an advanced, highly integrated digital pressure sensor designed for demanding automotive and industrial applications, with a particular focus on battery management systems.
Read more...
Slimline 150 W bench PSU
Vepac Electronics
Test & Measurement
The PeakTech P 6222 is the company’s new, slim laboratory power supply that offers precisely adjustable output values of 30 V and 5 A with a continuous power output of 150W.
Read more...
Redefining edge intelligence in RF analysis
Vepac Electronics
Test & Measurement
The HAROGIC PXR Series bridges the gap between benchtop-grade RF performance and high-performance edge computing.
Read more...
Otto Wireless appointed as sole agent for Dragino Technology
Otto Wireless Solutions
Test & Measurement
Dragino is a globally recognised leader in LoRaWAN and Internet of Things products and solutions, and is known for delivering reliable, cost-effective hardware.
Read more...
AI-ready rugged spectrum analysis for the field
Vepac Electronics
Test & Measurement
The HAROGIC PXR Series is a rugged, benchtop-grade spectrum analyser and an AI-ready open platform in a single portable instrument.
Read more...
Digid announces its nanoscale temperature and force sensors are ready for mass deployment
Test & Measurement
Digid, a pioneer of nanoscale sensing technology, recently announced that its patented printed electronics fabrication technology has been fully qualified for volume production of temperature and force sensors as small as 1 µm long.
Read more...
printer friendly version