Market and Product Overview Power Analyzers - Page 1
Forum section: electronics / testgear

author: aat24
author_rank: Contributor
timestamp: July 22, 2014, 07:58:55 pm
content: Looking for a power analyzer? Here you will find a free and comprehensive market and product overview:http://www.all-about-test.eu/power-analyzer.htmlPlease let us know if you know other products or useful background information we have not covered. Thanks!

author: electronic_eel
author_rank: Regular Contributor
timestamp: July 22, 2014, 10:34:40 pm
content: AFAIK Hameg (R&S) also have a power analyzer.Then there is the point of accuracy and bandwidth: e.g. ZES Zimmer claim 0.025% basic accuracy and (optional) 500KHz bandwidth for the LMG95. But you can nearly forget using it for 500KHz because the accuracy drops to 7%.With modern switching supplies higher frequencies get more important. So maybe you should add a column for accuracy at max frequency or something like this.

author: aat24
author_rank: Contributor
timestamp: July 23, 2014, 07:50:22 am
content: Thank you for your hint!We just checked the HAMEG website. There is a product named HM8115-2, a power meter with a measurement range 1 mW…8 kW. This is only a one channel instrument with a frequency range DC…1 kHz and very limited analysis functions. There are many other power meters on the market available. In our market overview we looked only at power analysers having comprehensive analysis functions, high accuracy, high bandwith and in many cases more than one channel to do also 3-phase measurements. To perform e.g. high accuracy efficiency measurements the instrument needs a high accuracy and bandwith.Adding a column for the accuracy at max frequency is a good idea, unfortunately the witdh of the table is a bit limited and there might be also other interesting parameters. So we decided to use only 4 main parameters.

author: Ton
author_rank: Regular Contributor
timestamp: July 23, 2014, 10:32:02 am
content: How about the Gossen Metrahit Energyhttps://www.gossenmetrawatt.com/english/produkte/metrahitenergy.htmnot so far from a LMG95e or PA1000, admitted not as accurate, but close, and analysing capabilities are also pretty close.br Ton

author: DaveW
author_rank: Frequent Contributor
timestamp: July 23, 2014, 12:19:29 pm
content: Quote from: aat24 on July 23, 2014, 07:50:22 amI measured the-3dB point of the Hameg at around 130kHz-I think the Hameg spec would be assuming a much higher accuracy than the -3dB you're using for other analysers,Reference, 17minutes,

author: aat24
author_rank: Contributor
timestamp: July 24, 2014, 12:55:21 pm
content: @TonThe Gossen Metrahit Energy is more a multimeter with some power measurement and analysis functions. On the first glance the data sheet looks impressive but for more detailed power measurements this instrument is not comparable with real power analyzers. If you have to perform e.g. an efficiency measurement on a power supply with an efficiency greater than 95% you will need a very high accuracy. Power analyzers are rated with better than 0,1%. The Gossen Metrahit Energy is rated with 0,4%. Then you have also to take into account the accuracy of the test adapters and current sensors needed. Also the voltage and current measurements need to be highly synchronized. Also this instrument has only one channel...@DaveWI think all test and measurement instruments will have and need some headroom in specifications. This will also be true for the other power analyzers and some of them have a bandwidth of 2 MHz in the spec.