疑问: 你好，请问你们牛顿N4L的PPA5510和PPA5511两者的区别是什么？我应该选择哪一款更适合使用？
回答：您好，就您关心的牛顿N4L的PPA5510和PPA5511两者的区别是什么？我们简单回复如下：
PPA5510: 电流分流阻抗值是10mOhm
可切换的低频硬件滤波器频率为200kHz(可编程的噪声滤波器频率小于200kHz)
PPA5511: 按照IEC标准：电流分流阻抗值为3mOhm,
按照IEC标准：可切换的低频硬件滤波器频率为9kHz
你可以看到：由于我们所有的PPA5500系列功率分析仪都具有高采样率和比较低的分流阻抗，所以采用我们标准的PPA5510也可以达到同样的测试效果，即我们的标准品PPA5510；但如果你是要建一个标准的校准或者检测实验室，当你的重点是对谐波和闪烁测试，那你就必须完全符合标准的每一个细节，这时你就应该选择我们牛顿的PPA5511功率分析仪器。 但是如果你不是想要建一个标准的校准或者检测实验室，而是需要进行更多的灵活性功率测试，包括合规的谐波和闪烁指标测量，那么我们推荐你用PPA5510即可；以上我们简单回复了您所关心的牛顿N4L的PPA5510和PPA5511两者的区别是什么？如果您还有更多的疑问请随时与我们联系：400-600-4845.
Answer: The PPA5510 unit and the PPA5511 have the following differences（牛顿N4L的PPA5510和PPA5511两者的区别是什么？）
PPA5510 Current shunt impedance - 10mOhm
Switchable low frequency hardware filter 200kHz (with programmable noise filter <200kHz)
PPA5511 Current shunt impedance – 3mOhm In accordance with IEC standard
Switchable low frequency hardware filter - 9kHz In accordance with IEC standard
You can see that the PPA series standard shunt impedance is low and due to the high sample rate of all PPA units, there is no measurement problem when using our standard low frequency filter. For these reasons, the standard PPA5510 will give the same measurement results for Harmonic and Flicker.
If you are a calibration laboratory that must have full compliance to every detail of the standard and you are only interested in Harmonics and Flicker, you should select the PPA5511. However If you are not a calibration laboratory and would like the most flexible power analyzer for many measurement functions including compliance level Harmonic and Flicker measurements, then we would recommend the PPA5510 （牛顿N4L的PPA5510和PPA5511两者的区别是什么？）