24v Nano/Madinverter
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poida![]() Guru ![]() Joined: 02/02/2017 Location: AustraliaPosts: 1432 |
0W in bottom right corner is the product of DC volts and DC current. IF there are available values for both, and they are sensible values, then we get a DC current value visible and a DC power value. Offset settings are needed due to many and varied methods we can use to feed the nanoverter it's inputs. The analog to digital conversion requires a voltage from 0 to 5V. I like to use LEM closed circuit control Hall effect current sensors for DC current. These are totally isolated, need 5V supply and give output of 0V for -50A, 2.5V for 0A and 5V for 50A I expect the zero amp sensor output to be close to 2.5V but never exactly what the nano sees as 2.5V So I need to obtain zero offsets for both current sensor inputs. I have offsets for both NTC thermistors, so I can have them both showing the same temperature when they are exposed to the same temperature. I could not leave it be when I saw 5 degC difference between two thermistors which were seeing the same temperatures. The latest code for nano2 has a display of output AC amps and AC VA I label it as "W" but again, it's the product of AC volts and current. It is ignorant of power factor. latest code (AC power display): nano2_5_ac_current_sensor_dc_signal.ino.zip wronger than a phone book full of wrong phone numbers |
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