Metoda Kalibrasi Sensor Perak Kapasitif Berbasis Mikrokontroler ATmega328 Sebagai Alat Ukur Beda Potensial Membran

A. A. N. Surya Mahendra Putra (Department of Physics, Faculty of Mathematics and Natural Sciences, Udayana University)
Ni Nyoman Rupiasih (Dept. of Physics, Udayana University)
I Wayan Supardi (Department of Physics, Faculty of Mathematics and Natural Sciences, Udayana University)

BULETIN FISIKA
Vol 25 No 2 (2024): BULETIN FISIKA

In making a measuring instrument, especially an electronics-based measuring instrument, it is necessary to calibrate the instrument made with a standard instrument while also knowing its measurement characteristics. In this study, a potential difference measuring instrument that was made using a silver capacitive sensor based on an ATmega328 microcontroller was calibrated using a standard reference electrode, namely Hanna HI 5414. The instrument was tested using a chitosan membrane and KCl solution. From the sensor calibration, an equation was found, namely Y = 0.9935 X + 0.0001 and has been converted to the ATmega328 microcontroller. The test results show that the accuracy of the measuring instrument reaches 99.82% with a measurement time of ± 3900 s faster than the standard instrument.