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Associate
April 23, 2025
Question

STPM01 IC - Offset Values at Zero Voltage

  • April 23, 2025
  • 2 replies
  • 352 views

I have been working, with STPM01 as a peripheral device with my micro controller to develop a e meter. On development with board, on testing on no voltage and no current or in case of voltage ( 220  - 240 AC ) AC and no load current. During these time the RMS value of current and voltage are non zero values, there is a offset error value of 4, or 5 in decimal. I there any solution to solve this offset. 

My other issue is that when there line voltage, but no current is taking but the active register is incrementing by 2 decimal. event though the BIL is high indicating there is no LOAD. Still the counter is counting, is this normal or is there any method to solve this.

2 replies

Andrew Neil
Super User
April 23, 2025

Note that STPM01 is Not Recommended for New Designs (NRND):

AndrewNeil_0-1745414318898.png

 

PS:

Don't forget to give the link from your previous post in the old thread.

A complex system that works is invariably found to have evolved from a simple system that worked.A complex system designed from scratch never works and cannot be patched up to make it work.
savanthAuthor
Associate
April 24, 2025

Still is there any solution to the issue, since i want to stick with the same board.