Version 2

ch_2_61.hex is for CH2500, (10V output/50R impedence).
c2_2_61.hex is for CH2500B, (12V output/35R impedence).
c3_2_61.hex is for CH2505B, (12V output/50R impedence).
c5_2_61.hex is for CH2505, (10V output/50R impedence).