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3.0 Front Panel: Data Entry and Display
The front panel consists of a user interface, which includes an alphanumeric display and a
membrane keypad to select operational modes and alarm settings. The display is a two line, 20
character each, liquid crystal display (LCD). The display is backlit to allow easy viewing over a wide
range of lighting conditions.
The lower line on the LCD is used to signify the function of the “soft keys” marked “A”, “B” and “C”.
The “soft key” current labels are displayed in the lower line of the LCD. If you press these keys,
then the function displayed above it will be performed.
The main keypad consists of eight “hard” keys whose function does not change. These keys are
used for basic control and programming of the LabTec.
The A B and C keys along with the Exit button are the only ones used in normal operation.
Pressing any key will take one out of Serial Mode, the mode used with this unit.
If the unit displaying something other than
“Serial CW 160 ml/m”
on the top line, press the Exit
button to reach
“Mode Select Serial”,
and then press C to select, and A to execute to return to the
proper screen.
Two LED’s are also on the front panel, just to the left of the main keypad. These indicate the current
pump status. A green light indicated the pump is in motion; the red light indicated that the pump has
stopped.
