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Model 4500 Premier Dust and Opacity Monitor
81
7.
Repeat the Re-calibration procedure (see section B3-3).
8.
Display the parameter 'B' on the Parameters menu (see section B3-6).
9.
The 'B' value should now be within the range 0.95 to 1.05. The zero point reflector is ready
for normal use. If the 'B' value is
not
within the range 0.95 to 1.05 then it will be necessary
to change the aperture and grating as described below.
If the
'B' value is less than 0.95
use the Aperture Plate
below
the previously selected aperture plate in the table.
If the
'B' value is greater than 1.05
use the Aperture Plate
above
the previously selected aperture plate in the table.
10. Repeat the Re-calibration as before and check the 'B' value again. Repeat steps 6 to 10 if
required.
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