B-1
Using the LI-830 and LI-850 Gas Analyzers
Appendix B.
Specifications
CO
2
measurements
Measurement range:
0 to 20,000 ppm
Accuracy
LI-850:
Within 1.5% of reading
LI-830:
Within 3% of reading
Calibration drift
Zero drift
1
:
<0.15 ppm per °C
Span drift
2
:
<0.03% per °C
Total drift at 370 ppm
3
:
<0.4 ppm per °C
RMS noise at 370 ppm with 1 sec signal filtering:
<1 ppm
Sensitivity to water vapor (LI-850 only):
<0.1 ppm CO
2
/ mmol mol
-1
H
2
O
Lower limit of detection:
1.5 ppm
H
2
O measurements (LI-850 only)
Measurement range:
0 to 60 mmol mol
-1
Accuracy:
Better than 1.5% of reading
Calibration drift
Drift at 0 mmol mol
-1
:
<0.003 mmol mol
-1
per °C
Span drift at 10 mmol mol
-1
:
<0.03% per °C
Total drift at 10 mmol mol
-1
:
<0.009 mmol mol
-1
per °C
RMS noise at 10 mmol mol
-1
with 1 sec signal filtering:
<0.01 mmol mol
-1
Sensitivity to CO
2
:
<0.0001 mmol mol
-1
H
2
O / ppm CO
2
Lower limit of detection:
0.015 mmol mol
-1
1
Zero drift is the change with temperature at 0 concentration.
2
Span drift is the residual error after re-zeroing following a temperature change.
3
Total drift is the change with temperature without re-zeroing or re-spanning.
Summary of Contents for LI-830
Page 1: ...Using the LI 830 and LI 850 Gas Analyzers...
Page 2: ......
Page 6: ...iv...
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