Why not recommend using a multimeter and power analyser to compare?
If you want to choose the most commonly used instrument for electrical engineers, I believe the chosen one will definitely be a multimeter. As the most commonly used instrument, a multimeter holds an irreplaceable position in the minds of users and has also generated great trust in it. However, is it true that a multimeter will not make mistakes in various testing environments?
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When receiving feedback from users, they will say, "The display of this power analyzer is different from that of a multimeter (handheld). Our multimeter is imported, but it still cannot be produced domestically."
However, how much space is there for comparison between a multimeter and a power analyzer? What is right and wrong when there are differences?
Firstly, we need to clarify the specific differences in parameters between a multimeter and a power analyzer.
bandwidth
Bandwidth is a key reference value for whether the measured signal can be accurately measured. The testing bandwidth of most common multimeters is mainly around 40-70Hz. Some desktop and a small number of handheld multimeters can measure intermediate frequency signals at 400Hz, while desktop multimeters with five and a half bits, six and a half bits, and above can also test signals at several hundred kHz. Power analyzers have advantages in bandwidth, for example, the bandwidth parameter of PA5000H is 5M, and the bandwidth parameters of power analyzers are mostly set at 1M and 2M levels both domestically and internationally.
sampling rate
The sampling rate is also a crucial parameter during testing. The sampling rate of the multimeter is not very high, with desktop models being better at around a few hundred k, while the sampling rate of the power analyzer is set at around 2M.
accuracy
The difference in accuracy is mainly shown on handheld multimeters. Our most commonly used multimeter uses relatively low ADC bits, and there may be some limitations to the accuracy of testing; Of course, for a desktop multimeter, a six and a half bit multimeter is already using a 24 bit ADC, and even a power analyzer with a 0.01% accuracy model is only an 18 bit ADC.
Synchronicity
Users often use a multimeter to measure one indicator, voltage, current, or resistance. If testing power requires testing voltage separately, then testing current for calculation; The channel of the power analyzer can simultaneously test voltage and current, and then calculate parameters such as power.
