高美LMG670 高精度双路径功率分析仪

2022-05-18
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LMG670 - 强大的 方便的 灵活的

双路径功率分析

两种带宽同时测量,一次运算同时获得窄频带、宽频带和谐波测量的结果

LMG670 功率分析仪 产品概述

  • 双路径:在单次测量中同时、不混淆地获得窄频带、 宽频带的真有效值和谐波值
  • 采样速率:最大1.2MS/s的高速采样率
  • 数据更新率:获取真有效值的最小更新时间是 30ms
  • 精度:极其高的测量精度,测量值的0.015%+量程峰值 的0.01%
  • 动态量程;全动态量程连续可用,电流从500μA到 32A,电压从3mV到1000V,功率测量从待机功率到全负载(最大32A)都不需要物理连接改变
  • 带宽:频率范围从DC到10MHz
  • 灵活性:1~7个功率测量模块自由配置,模块可以更换
  • 连续性:无间隙采样,18位的A/D转换器,最快周期时 间是30ms。在记录测量值和完整捕捉所有相关事件时没有间断
  • U-I同步性:电压和电流输入之间的时间偏移可调节, 步进小于3ns低功率因数和/或高频率的测量非常精确
  • 抗干扰:在严重的电磁干扰环境也能可靠地工作
  • A/B/C模块;适用于任何应用的合适模块
  • 模块A:精度0.025%,最大10MHz
  • 模块B:精度0.11%,最大500kHz
  • 模块C:精度0.04%,最大10kHz
  • 对地电容:小于90pF的特别低的对地电容,防止来自 泄漏电流的干扰
  • 计量:12个月的计量间隔保证了低维护成本和仪器处 于最佳可用状态
  • 质保期:24个月

LMG670 功率分析仪 功能特性

适用于各种应用的多种通道组合

功率分析仪提供不同的精度等级,允许用户选择合适的仪器来完成手上的工作。毕竟不是所有的应用都需要最高的精度。通常一般的分辨率和精度就已经足够。令人遗憾的是,不是所有的测量应用都是如此。经常会出现如下情况,在相同的测量配 置下不同的测量点需要不同的带宽和精度等级。这是为什么LMG670提供三种不同的输入模块,并可以安装到同一个主机箱里,以保证你可以根 据自己的特殊应用量身定制所需的测量仪器。这样一个低价格的解决方案能同样很好地达到你的要求,不需要去折衷接受低精度或者大材小用。

两种带宽同时测量,多亏双路径-不是妥协,无需置疑

传统的功率分析仪,被测信号首先经历模拟处理,然后经A/D转换器转换成数字信号进行处理,得到的信号 即可在整个频率范围都被测量,也可经过抗混淆滤波器作为FFT分析的基础或进一步的数字滤波。由于A/D转换器的局限性,它们固有的一些缺 点将被带入到传统的设备中。如果开启滤波器进行测量,为了避免FFT分析的混淆,宽频带的值被丢弃。如果关闭滤波器,严格来讲,不应使用 FFT。假如不使用抗混淆滤波器进行整个频率范围的FFT分析,计算值是可疑的,混淆误差高达50%。例如,很容易发现,无论如何至少有0.5%的 偏差会被忽视。最后,当交替进行滤波和不滤波测量时,结果的有效性同样是有问题的,因为这假定了信号不随着时间而改变这个条件,而这 在事实上几乎是不存在。此外,这个处理过程特别的消耗时间。

最后,所有的测量方法的提出都仅仅是令人不满意的妥协方案。这就是为什么ZES ZIMMER从根本上从新设 计信号的处理和研发双路径架构。模拟处理与传统的测量仪器相同,然而随后的数字处理已经彻底改变。LMG670是世界上少有在每个电压和 电流通道都有两个A/D转换器在两个独立信号路径的功率分析仪。一个用于宽频带信号的无滤波测量,另一个用于抗混淆滤波器输出的窄频带信 号测量。并行的采样值数字化处理让用户同时获取同一个信号的两种测量值,也不用担心混淆影响的风险。这种独特的处理避免了之前提及的 所有方法的缺点,保证在更短的时间内得到更精确的结果

LMG670 功率分析仪 标准配置

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