Land 4500 MKII Premier, Operation And Maintenance Manual

Page: 71 / 139

Model 4500 Premier Dust and Opacity Monitor
71
Isokinetic Dust Measurement
When all the samples have been analysed gravimetrically, it will be possible to plot a graph of dust
density against average optical density for each of the samples. Plot a 'best fit' straight line passing
through the origin as shown below. The gradient of this line is the Dust Gain value for your application.
1
2
3
"
200
150
100
50
0
0.05 0.10 0.15 0. 20 0.00
0.125
4500 Premier Optical Dust Value
Graph of Isokinetic Dust Measurement v 4500 Premier Optical Density Value
The Dust Gain value must now be input into the Model 4500 Premier using the setup menu in the User
interface.
1. Choose SETUP: Miscellaneous: Dust Gain.
2. Press 'ENTER' (
↵ ↵↵
↵↵
) key. Use the
↑
or
↓
keys to store.
3. Press and hold the Maintenance key for 1 second return to the 'Run' mode.
The Model 4500 Premier is now correctly calibrated for dust measurements.