Teledyne LXT-220 - Manual (Page 23)

Dissolved Oxygen Controller Operation
Teledyne Analytical Instruments 23
Operation
No one instrument has all the options described in this document.
Some options must be specified at the time the instrument is purchased,
and are not field-alterable. The instrument can be returned to the factory
for re-programming if your requirements change.
3.1 Using the Front Panel Keys
Cursor positions or numeric adjustments are performed by pressing
the appropriate keypad. The LXT-220 uses an "underscore" cursor in
each of the menus. Holding down the keypad will automatically scroll
the cursor or numeric values.
Note: Simultaneous pressing 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:
1. 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.
2. Exit the calibration mode and save calibration data.
3.1.2 Calibrate Keys
1. 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.
2. Once in the calibrate mode, the cursor can be positioned by
pressing the individual right-hand or left-hand horizontal
CALIBRATE keys.