High metering accurate
Fulfill the requirement of GB/T 17215.321-2008/IEC 62053-21:2003, GB/T 17215.322-2008/IEC62053-22:2003 and GB/T17215.323-2008/IEC 62053-23:2003. 
-  Less than 0.1% error in active energy metering over a dynamic range of 5000:1. 
-  Less than 0.1% error in reactive energy metering over a dynamic range of 3000:1.
2 independent oversampling ∑-∆ ADCs: one voltage and one current 
Various measurements: 
-  DC components of voltage and current signals 
-  Raw/ instantaneous/ average value for total/ fundamental voltage/ current RMS 
-  Raw/ instantaneous/ average value for total/ fundamental active/reactive power 
-  Line frequency 
Support current detection 
Support UARTs
Current input: Shunt Resistor or CT 
Crystal input frequency: 6.5536MHz or 3.2768MHz (V9260F)