Development of the energy tester for defibrillator

The objective of this research was to design and construct of the energy tester for defibrillator. This research has adopted the principle of the calorimetric method. The designed and constructed the tester was composed of 3 main parts: 1) the input part consisting of the paddle electrodes receptacle and thermocouple for converting the electrical energy to heat energy and measuring the temperature changed respectively, 2) the signal conditioner and processing part including IC AD59SAQ for signal conditioning and 32 bit PIC microcontroller PIC32MX460F512L with c language for processing the calibration graph of relationship between standard electrical energy discharged from defibrillator and digital output of the each temperature variation and 3) the display part comprising of liquid crystal display for displaying the value of electrical energy in Joule. The results of functional testing, we measured the energy of 3 model of monophasic, biphasic and rectilinear waveforms of defibrillator by 5 times compared with the standard defibrillator analyzer Fluke Impulse showed that the average percentage error were 5.67 %, 3.34% and 6.04 % for monophasic 1 biphasic and rectilinear waveform respectively.