1.Press ADD and Minus at the same time for about 2 seconds, and the display will show letter A; 2.Press SET and display will show letter E, then press ADD or Minus to change the number to the one needed. 3.Press SET and display will show letter H, then press ADD or Minus to change the number to the one needed.) 4.Press SET and display will show letter P, then press ADD or Minus to change the number to the one needed.) 5.Press SET and display will show letter F, then press ADD or Minus to change the number to the one needed, usually 8.) E: the number of different types of coins you want to use. (1-6) H: the sampling quantity for each type of coin. (1-20) P: the number of signal output for each type of coin. (1-50) F: the precision of coin. (1-20) (the smaller the number, the higher the precision. 8 is suggested. ) Sampling procedures: 1.Press SET and display will show letter A, then press SET again and display will show letter A1, then the first LED light will be on. Now input 20 samples of the first type of coin. (when the item H is set as 20.) 2.When the first step is done, LED lights will flicker and display will show letter A2, the first 2 LED lights will be on, then input 20 samples of the second type of coin. (when the item H is set as 20.) By that analogy, when all the samplings are done, all the LED lights will flicker several times and then the coin selector can be used.