Ametek Land 4500 MKIII, User Manual

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Opacity and Dust Monitor
User Guide
Model 4500 MkIII
F - 2
3) Fit the new aperture and grating, and replace the check reflector.
4) Repeat the clear-path calibration and check the B value. If it is within
the range 0.95 to 1.05, the B value is acceptable. Otherwise repeat the
procedure.
Example
The B-value is 1.23, Grating 2, Aperture F
•
Sequence number is 25.
• B-value is 0.20 too high.
• 0.20 = 4 x 0.05, so the required sequence number is 29
• Refer to Section F6. The sequence number is 29. Therefore select
Grating 2, Aperture J.
F4 Calibration Error Test
Perform a calibration error test according to ASTM D6216-12 para 7.8. Select
three audit filters selected according to the requirements of ASTM D6216
para 7.5. The 2” square audit filters provided as an optional item with the
Model 4500 MkIII are suitable. Ensure the calibration certificates are up-to-
date.
1) Open the 4500 MkIII transceiver at the hinge and place the low-level
filter in the audit filter slot.
2) Close the transceiver and wait for the reading to settle. Record the
opacity value indicated on the site data acquisition system. As a
precaution, it is advisable to write down the value displayed on the
Model 4500 MkIII user interface.
3) Repeat steps 1 and 2 for the mid- and high-level opacity filters.
4) Repeat steps 1, 2 and 3 four more times, to give a total of five readings
for each filter.
5) Calculate the calibration error as described in D6216 para 7.8.
Fig. F-1