21Section 5 Standard Operations5.1 Overview5.1.1 Tips for the use of the touch screenThe entire screen is touch-activated. To make a selection, press thescreen with a fingernail, fingertip, pencil eraser or a stylus. Do notpress the screen with a sharp object, such as the tip of a ballpoint pen.• Do not place anything on top of the screen, to prevent damageor scratching on the screen.• Press keys, words or icons to select them.• Use scroll bars to move up and down long lists very quickly.Press and hold the scroll bar, then move up or down to movethrough the list.• Highlight an item from a list by pressing it once. When the itemhas been successfully selected, it will be displayed as reversedtext (light text on a dark background).5.1.2 Use of the alphanumeric keypadThis display is used to enter letters, numbers and symbols asneeded when programming the instrument. Unavailable options aredisabled (grayed out). The icons on the right and left of the screenare described in Table 1.The central keypad changes to reflect the chosen entry mode.Press a key repeatedly until the desired character appears on thescreen. A space can be entered by using the underscore on theYZ_ key.Note: A USB keyboard (with US keyboard layout) or a USB Barcodehandset scanner can be used for input (see Section 9 on page 129).Table 1 Alphanumeric keypadIcon / key Description FunctionABC/abc Alphabetic When entering alphabetic characters (ex. user-entered units), this key allows totoggle between upper and lower case letters.# % Symbols Punctuation, symbols and numerical sub- and superscripts may be entered.123 Numeric For entering regular numbers.CE Clear Entry Clear the entry.Left Arrow Backspace Moves back one position. This deletes the character previously entered in the newposition.Right Arrow Advance Moves to the next space in an entry when two adjacent characters occur on thesame key.
