Chapter 3. Initial Setup and Programming24 AT600 User’s Manual3.2 AT600 Keypad OperationThere are six keys and two LED on the AT600 keypad. The green light is a system health indicator and it is on whenthe meter is operational and not in error. The red light is a system status indicator and it is on when the meter is in error.When both lights are off, the meter indicates the system is in configuration mode or no power has been applied to themeter.Figure 30: AT600 KeypadSix keys on the magnetic keypad enable users to program the AT600:• [] - confirms the choice of a specific option and data entry within the option• [] - enables users to exit from a specific option without entering unconfirmed data• [] and [] - enable users to highlight a specific window in the display option or to scroll through a list ofoptions (parameters, letters, and numbers, 0-9 as well as the negative sign and decimal point) in a menu• [] and [] - enable users to scroll to a specific option, among choices in an option, or to a character in a textentry.When the AT600 is powered up, the initial screen display appears, followed by a display of measurement parameters.As a guide in following the programming instructions in this chapter, the relevant portions of the AT600 menu maphave been reproduced on page 98.IMPORTANT: If the keypad has not been pressed for 5 minutes, the AT600 exits the Keypad Program and returns todisplaying measurements. The meter discards any configuration changes. Changes can only be retainedafter the user commits them.AT600INITIALIZE . .0.0Velocitym/sSoundspeedm/s0.0
