User`s manual

ProScale M150, M250 and all products with General Purpose LCD Digital Displays 24 of 44
Display Operation
The LCD
The above figure illustrates all the segments available on the Digital Display.
CAUTION: Pressing and holding the ON/OFF and MODE key for 10
seconds while the display is turned off will perform a full segment LCD
test AND re-set all programming parameters to factory defaults
Display Keys
Timing
The keys pictured above, found on all General Purpose LCD Digital Displays, have
multiple functions. Timing, that is how long a key is depressed, and the combination of
the keys pressed is important. This manual uses the term ‘”momentarily” to describe a
key press of typically less than 1 second. Whereas “press and hold” is used imply a key
press of typically longer than 1.5 seconds. As an example; when using a PC keyboard to
type a capital letter you would “press and hold” the SHIFT key and “momentarily depress
the LETTER key.
In addition the key(s) “function” is executed on the key RELEASE, not the key
DEPRESS. This is important since some keys execute different functions based on how
long they are depressed. These key operations, once tried, quickly become intuitive.