I would like to know if the -0.0244%/LSB error adjustment factor given in the datasheet for the ADE7753 should be an absolute value? Or is there factors that can infuence it?
I am using a custom phantom feed setup to supply energy and using a reference standard to determine the error. The source is not very stable and runs at a power factor of 0.93.
When determining the WGAIN factor, the error is divided by -0.0244. This often gives WGAIN values that does not remove the error effectively.
As an example: if the error is 5.03% the WGAIN is determined to be -206. After entering this value the error is -0.3%. Adjusting the WGAIN value to -195 gives a 0.01% error. These results are repeatable.
Another example: The initial error of another meter is 4.34% and the WGAIN is set to -178. This adjusts the error to -0.2%. Setting the WGAIN to -168 gives a 0.05% error.
1. Is the -0.0244%/LSB value given in the datasheet an absolute?
2. What factors is any can influence this value?