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Model LXT-230 Instruction Manual / 7
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.
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.
S/N 1234 V 2.01
(C) ECD 2002
Contrast 20