Unexpected Output from AC Voltage Monitor

Hardware
1

I just received my PEVMAC2C ac voltage monitor. Using the github python code ‘voltage.py’ by bhaskar-anil429 I get the following output:

Type of Sensor : 5
Maximum Current : 240 A
No. of Channels : 2
Channel no : 1
volt Value : 119.876 A
Channel no : 2
volt Value : 120.684 A

Looks reasonable, running the script again (about 10 seconds later) I get :

Type of Sensor : 5
Maximum Current : 112 A
No. of Channels : 130
Channel no : 1
volt Value : 119.940 A
Channel no : 2
volt Value : 121.493 A

The second (third, forth, fifth, …) time the script is executed the Maximum Current is always 112 A and No. of Channels is always 130. (I understand that ‘A’ should really be ‘V’. ‘voltage.py’ appears to be a modification of the code for the current monitors that never got fully amended.)

I have the PECMAC2100A current sensor that uses very similar code and it has worked flawlessly. Any ideas what’s happening to the voltage monitor that I’m getting 130 channels?

2

Hi,
these values are picked from the controller eeprom.
could you try rebooting the board and see if you still get the wrong results.

Thanks

3

I disconnected power to the board and restarted. I get the same results, except for the first run, the results are 112(MC) and 130(NOC). Ultimately, it won’t affect how I plan on using the sensor, but I thought it was worth noting. Looks like both values changed by 128.