//calculate ch
      ch=(tlong/100)%10;      // extract 0.1 volts digit
      Lcd_Chr_CP(48+ch);    // display 0.ch before point ch=measured(48 refers to 0 in ASCII)

      ch=(tlong/10)%10;       // extract 0.01 volts digit
      Lcd_Chr_CP(48+ch);    // display 0.ch before point ch=measured(48 refers to 0 in ASCII)