Land 4500 MKII Premier, Operation And Maintenance Manual

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Model 4500 Premier Dust and Opacity Monitor
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B1-2 Function Keys
The following function keys are located on the user interface.
Key Function
ENTER Generally used for selecting menu items and for making and
saving changes.
or Scrolls the main and secondary menus
or Scrolls sub menus and selects/alters parameters for changes
EXIT Returns to the previous menu level.
Maintenance Key - the instrument must be unlocked before any
parameter setup or adjustment can take place.
Contrast Control
Maintenance Key Operation
The instrument is unlocked by holding the key down for a period of 3 seconds. Once unlocked
the red LED will illuminate. The instrument will then request a password. The default password is 10.
To return the instrument to normal operation, the key must be pressed for 1 second. The red LED will
then go off.
NOTE
No Modbus communication is possible whilst the instrument is unlocked.
Contrast Key Operation
The Contrast control should be used to vary the LCD display contrast.
Press ‘+’ to increase contrast
Press ‘-’ to decrease contrast