Stability HLW8110

[manuferro]

Hi,
I'm creating a project with hlw8112. Was your 8110 stable?
I mean were you able to measure correctly the frequency for istance?

Thanks
Manuele

[mgoeller]

Hi Manuele

We are also developing a product based on HLW8112, we are able to get an accurate and stable frequency measurement. But with the IC set to calibration free mode, e.g. SYSCON registers set to:
-Current Channel A Gain: 16
-Current Channel B Gain: 16
-Voltage Channel U Gain: 1
Reading out these registers again, confirms they are set correctly.

Unfortunately reading out the coefficient & value registers (RmsIAC, RmsIBC, RmsUC + Correct Checksum) returns some incorrect values after the calculations. E.g. an applied test load of 500W, at 230V leads to: 132V, 2A, 240W

Of course I could just correct by a factor 2 for the Ampere and Power, but that does is against the purpose of a calibration free IC, right?

What is your experience? Maybe it makes sense to communicate by email: mailgoe AT gmail DOT com