... and so on. 3. LCD display 4. Power:Battery, DC, leaf area meter, leaf area scanner, leaf area calculator1. nstructions 1.1 ... Switching: press the "power" key , LCD display "Leaf area, Meter-B"; Press the "Power" key again to shutdown.1.2 ... condition.Then LCD will display:Put the leaf into the meter, place the leaf below the pressure lever, the initial ... by RS232 and put the date to PC. leaf area meter