Land 4500 MKII Premier, Operation And Maintenance Manual

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Model 4500 Premier Dust and Opacity Monitor
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B1-3 Glossary of Terms
Op ............................... Opacity
O.D. ............................ Optical Density
Dust ............................ Dust Density
Averaging 1 ................. Time period used to calculate block average of output 1
Averaging 2 ................. Time period used to calculate block average of output 2
Status .......................... System Status Faults
Loop O/P 1 .................. Current loop output 1 reading in mA
Loop O/P 2 .................. Current loop output 2 reading in mA
Last Zero ..................... Last zero calibration value
Last Span .................... Last span calibration value
Cal. Drift ...................... Drift of signal between calibrations (range 0.1 to 1.0)
Version ........................ Software Version Number
Blank ........................... A blank line
So ............................... Signal Detector Offset
Sf ................................ Signal Detector Flood Value
Sm .............................. Signal Detector Measurement
Ro ............................... Reference Detector offset
Rf ................................ Reference Detector Flood Value
Rm .............................. Reference Detector Measurement
C ................................. Calibration Constant
X ................................. Calibration constant
B ................................. Balance correction
G ................................. Gain correction factor
Q ................................. Uncorrected transmission factor
Dust Gain .................... Constant relating Optical Density to Dust Density.
Dust Offset .................. Optical Density v Dust Density zero offset (usually zero)
Zero Damper ............... Low pass digital filter applied to zero reading
Flood Damper ............. Low pass digital filter applied to flood LED
Cal Damper ................. Low pass digital filter applied to calibration
OP 1 Damper .............. Low pass digital filter applied to output 1
OP 2 Damper .............. Low pass digital filter applied to output 2
PLCF ........................... Path Length Correction Factor
OPLR .......................... Optical Path Length Ratio
Last Cal. ...................... Data stored from the latest calibration
Zero Comp. ................. Opacity compensation due to dust build on the lens
Isokinetic O.D. ............ Average Optical Density calculated during gravimetric test
Running Out ................ Positioning the zero reflector or upscale filter to an active position
Running In .................. Positioning the zero reflector or upscale filter to an inactive position