ACS711ex measuring problem

[vladsuk]

I have ACS711 connected to inp4 of LK ver.2, fw 3.10. I am measuring smaller currents 5Amps max. from solar panel. When dark, the inp4 value is compensated to 0. My problem is that during the night sometimes the inp4 value goes shortly to negative -0.07, when simultaneously the inp5 value is bigger than 0V ( typically 0.1V), then the value in P*T raises up to several thousands and the inp4 value sent to ThingSpeak becomes 248.

How can I prevent the inp4 value to go to negative? Is it the sensor or LK problem?

Many thanks for Your help.

[wilkxt]

add calibration value, about 0,07

[vladsuk]

Thanks, of course it is the way, but in my case (small currents, small power) it considerably influences the P*t result during a day. What about fw solution - if I < 0 then set to 0 - would it be possible?

[wilkxt]

yes, in next soft version

[vladsuk]

Thank You very much, I´ll be looking forward for it.

[vladsuk]

Hello, is there any progress in fw solution of negative current value reading and its influence on power value? Thanks