- -40• Some keys are disabled during logging. The following keys are enabled: MEM, MENU, ENTERand ESC.• Pressing the MEM and MENU keys has no effect on the logged data if these keys are pressedafter starting the recording, otherwise the following is valid.5.1.3 Print functionPress ENTER to send the measured data directly to the USB port, in real time. The printed dataunits of measurements are the same as those used on the display. The function is started by pressingENTER.The time interval between two consecutive prints can be set from 15 second to 1 hour (please seethe Print interval menu item at par. 4.3.1 Print Interval). If the print interval is equal to 0, bypressing ENTER a single data is sent to the connected device. If the print interval is higher than 0,the data transfer continues until the operator stops it by pressing ENTER again.