Teledyne LXT-230 manual Familiarization, Key Functions, Menu Selection Keys, Calibrate Keys

3.0 FAMILIARIZATION

This section will provide an overview of the front panel key functions and the display menus for a single channel pH and ORP transmitter. Multiple channel transmitters will have the same menus.

3.1 Key Functions

Cursor positions or numeric adjustments are performed by pressing the appropriate keypad. The LXT-230 uses an "underline" cursor in each of the menus. Holding down the keypad will automatically scroll the cursor or numeric values. Please note that simultaneous pressure on both vertical keys or any combination of keys other than the two horizontal CALIBRATE keys is not recommended.

3.1.1 Menu Selection Keys

The MENU SELECTION keys are used to change the display menu and move the cursor vertically. Any menu can be accessed by the use of the appropriate up or down MENU SELECTION key, advancing the screen to the desired menu. These keys are also used to exit the calibration mode and save calibration data.

3.1.2 Calibrate Keys

The horizontal CALIBRATE keys are used to enter the calibrate mode and move the cursor horizontally. To enter the calibrate mode, both horizontal CALIBRATE keys must be pressed simultaneously. Once in the calibrate mode, the cursor can be positioned by pressing the individual right-hand or left-hand CALIBRATE keys.

The vertical CALIBRATE keys are used to perform numeric adjustments to displayed values. To use these keys, the LXT-230 must be in the calibrate mode. Pressing the upper CALIBRATE key will increase the value; pressing the lower CALIBRATE key will decrease the value.

To exit the calibrate mode, press either of the MENU SELECTION keys.

3.2 Display Menus and Screens

When the LXT-230 is first powered, the Copyright Display will appear for a few seconds, then the LXT-230 will display the Main Menu.

S/N 1234	V 2.01
(C) ECD	2002

The Copyright Display provides the software "version" number and the software serial number. TAI will require this information if software updates are to be performed. To access any of the menus listed below, press the desired MENU SELECTION key.

3.2.1 Contrast Menu

Display contrast can be adjusted to allow for variations of ambient lighting. The Contrast Menu is the same for all LXT-230 transmitters and is the uppermost screen. To access this menu from the Main Menu, press the upper MENU SELECTION key.

Contrast 20

Model LXT-230 Instruction Manual / 7