Land 4500 MKII Premier, Operation And Maintenance Manual

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Model 4500 Premier Dust and Opacity Monitor
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B1 Getting Started
B1-1 The User Interface
The Model 4500 Premier is operated from the User Interface in the Transceiver. The User Interface is
operated via various function keys. It has five illuminated indicators, a contrast control and a maintenance
key.
The liquid crystal display normally indicates the opacity measured by the instrument. Error messages
and other parameters can also be displayed, as explained in a later section. The displayed opacity is
corrected for Optical Path Length Ratio (OPLR), sometimes refered to as Pathlength Correction Factor
(PLCF) (OPLR = 0.5 x PLCF). The OPLR is factory set and cannot be changed by the customer (see
section C1-3).
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User Interface
1 System status 6 Contrast control
2 Alarm 1 status 7 LCD
3 Alarm 2 status 8 Maintenance key
4 Zero Calibration in progress 9 Menu exit key
5 Span Calibration in progress 10 Function keys