ET 200 SP Energy Meter HF AI resolution

Hello ,

Does anbody know the resolution of the ADC in the Energy Meter HF for ET200SP?  I have searched this information in the manual but didn´t find it.  

 Thank you

david_bautista

Hello ,

Does anbody know the resolution of the ADC in the Energy Meter HF for ET200SP?  I have searched this information in the manual but didn´t find it.  

 Thank you

Hello david_bautista,

It is mentioned there AI Energy Meter data sheet, its sampling rate is 2kHz, means 39 samples on 50Hz or 32 on 60Hz.

So in total even Sentron PAC3200 is more accurate.

Inside manual it is mentioned Accuracy of the line frequency (50 Hz or 60 Hz) is maintained according to IEC 61557-12, and connection via a current transformer is always required for the current measurement. Use toroids with an accuracy class of 0.5, 1 or 3.

PAC3200 - Sampling rate 64 samples / cycle at 60Hz

PAC4200 - Sampling rate 2048 samples per 10/12 cycles for 50/60H

It is necessary at least 10 periods to measure frequency . For 50hz that's 200ms.

Once you have frequency of your input signal than you can measure other values correctly(Effective values of current7voltage)