Andrew's Week 10 Report

This week Ashley and I continued to work on the Irms and Active Energy Callibrations.  To callibrate Irms we followed steps very similar to the Vrms method.  For the Active Energy Callibration we began performing the calculations outlined on page 34 of the datasheet. To perform the accurate source calibration I built a sink which consumes 600W at close to 1.0 power factor.  This was constructed using three 200W light bulbs which will draw roughly 5 amps of current at 120V.  The data sheet calculations are being performed using these values as our base factors. 
Currently our Vrms measurement are accurate within +-5%.  To get a more consistent voltage measurement I seperated all the digital and analog connections from each other.  This involved adding one more power supply which will provide +5V.  Unfortunately while re connecting the Vanalog I swapped the positive and negative which resulted in a blown ADE7763.  This mistake put a hault to the callibration but our new chip is being soldered and will hopefully be ready for action this by this evening.  A photo of the current circuit and its breadboard power supplies are shown below: 

Next week we plan to finish or become closer to finishing all the callibrations required for the ADE7763.