Why Doesn't the Voltage, Current, Power Values Measured on Power Meter A Match Those From Power Meter B?

Check for differences in the specifications or features of the instruments.

For values that do not match when inputting a 50/60 sine wave

  • Check whether the value is within the specifications (error) of each power meter.
  • Check the DC offset in DC mode
  • Check whether the measuring range is set appropriately.
  • Check whether your power meters have harmonic measurement functions.

If the measuring range is too large relative to the input signal, the amount of error will increase. Differences in measured values can occur due to DC offset and other effects on AC power meters and AC/DC power meters. If the waveform is subtly distorted, harmonic components are present. The effects of such harmonic components can cause differences in measured values between power meters dedicated for 50/60 Hz and power meters supporting harmonics. 

For values do not match when inputting distorted waves or high frequency waves

  • Check whether the value is within the specifications (error) of the high frequency input of each power meter.

If the measured values on power meter A are larger than those from power meter B, there are at least two possibilities:

  1. The frequency characteristic (bandwidth) of power meter A is higher (frequencies are attenuated on power meter B).
  2. Power meter B has superior common mode (voltage) rejection ratio characteristics.

相关产品和解决方案

PZ4000功率分析仪

PZ4000设计用于高频功率测量以及瞬时功率测量。此仪器的实时采集系统可执行按周期的功率测量。一到四个输入单元提供0.2%的基本精度,具备2MHz的带宽和5MS/秒的数字化速率。

功率分析仪 WT500

中等量程的WT500小巧且便于使用。使用其彩色TFT显示器可以观测数值和波形测量。提供1到3个输入单元,基本功率精度为0.1%,带宽为100kHz。

高性能功率分析仪 WT1800系列

高端WT1800是WT1600的升级产品,可应用于从节能到高负载应用在内的各种应用领域。WT1800拥有6单元输入能力,可提供最大的灵活性和5MHz带宽下0.1%的基本功率精度。

高精度功率分析仪 WT3000

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数字功率分析仪

功率计或称瓦特计,可以测量产生、转换或消耗电能的设备各项特征,包括设备的各项参数,如:功率(瓦特)、功率因数、谐波和效率等等。

YOKOGAWA数字功率分析仪,性能优越、测量可靠,支持各种应用,非常值得拥有。尤其是YOKOGAWA WT300E功率计,已经在全球功率计市场份额上遥遥领先。

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