ZMPT101B Calibration Without trim pot

Other Hardware Device Hacking
1

Hello.

I'm wondering if it is possible to calibrate the AC voltage sensor ZMPT101B without using the trim pot?

I would like to integrate this sensor to my project so I can read the AC voltage with the atmega2560 microcontroller. This project is intended to be scalable so it is gonna be complicated if a calibration is needed for each board.

I'm planning to read voltages between 0-220VA @50Hz. It is possible to use a fixed resistor for this porpuse?

Any idea would be helpfull.

I found this document where they use a polynomial ecuation to calibrate the sensor but I think they use the trim pot to set the offset. Can I use a digital potentiometer to set the offset to 512ADC with the voltage in 0 and then be able to use their formula?

https://www.researchgate.net/profile/Mamunu_Mustapha/publication/316636029_Calibration_of_ZMPT101B_voltage_sensor_module_using_polynomial_regression_for_accurate_load_monitoring/links/5a13d4a20f7e9b1e5730a48d/Calibration-of-ZMPT101B-voltage-sensor-module-using-polynomial-regression-for-accurate-load-monitoring.pdf

Thanks before hand.