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Section 3
3-16
Setup and Operation
Cal Coefficients Page
The LI-7500 uses a fifth order polynomial for the CO
2
calibration, and a third order
polynomial for H
2
O calibration. The Calibration Coefficients page displays these factory-
determined calibration coefficients, as well as a factor for correcting CO
2
measurements for
band broadening due to the presence of water vapor, and a zero drift correction factor (Z).
The coefficient shown as XS (Cross Sensitivity) compensates for slight cross sensitivity
between CO
2
and H
2
O signals absorbed by the detector (see Cross Sensitivity on page 2-4,
and Zero Drift on page 2-5).
Summary of Contents for LI-7500
Page 1: ...Analyzer Environmental Division Instruction Manual 7500...
Page 2: ...Open Path CO2 H2O Analyzer Instruction Manual...
Page 41: ...Section 3 3 12 Setup and Operation...
Page 43: ...Section 3 3 14 Setup and Operation...
Page 46: ...Section 3 Setup and Operation 3 17...
Page 50: ...Section 3 Setup and Operation 3 21 Inputs Page Temperature Pressure and Auxiliary Inputs...
Page 56: ...Section 3 Setup and Operation 3 27...
Page 58: ...Section 3 Setup and Operation 3 29...
Page 67: ...Section 3 3 38 Setup and Operation...
Page 70: ...Section 3 Setup and Operation 3 41...
Page 107: ...Section 6 6 6 Troubleshooting...