Ametek Land 4500 MKIII, User Manual

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Opacity and Dust Monitor
User Guide
Model 4500 MkIII
B - 22
CAUTION
Do not attempt to move the zero point reflector by hand. The
precision gearbox will be damaged beyond repair.
7) Insert a calibrated neutral density filter into slot 1, taking care not to
touch the glass. Read and record the displayed opacity value.
8) Note that this value is path-length corrected. If the PLCF is set to 1.0,
the displayed value should match the filter opacity. If the PLCF is not
1.0, use the following formula to calculate the expected instrument
reading:
Displayed Opacity = 1 - (1-FilterOpacity)
1/PLCF
9) The operating wavelength of the Model 4500 MkIII is 525 nm. All audit
filters will be calibrated at this wavelength.
10) Remove the filter, insert the next filter and record the reading.
Exit from Audit Mode
Use the and arrows to select Stop and press
The Zero Reflector is retracted and the instrument resumes normal
operation.
Press twice to return to the main screen.
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