Section 4. Maintenance
CO2
Span
Gas
Regulator
liters/min
1
2
4
3
5
Flow Meter
Vent
1
2
4
3
5
ter
Vent
t
5
Enter the CO
2
concentration of the span gas into the software.
6
When the CO
2
reading has stabilized, click
Span CO
2
.
Setting the secondary CO
2
span
You can set a second span (using a gas that has a CO
2
concentration that is higher
or lower than the primary span gas) to improve the precision of the analyzer. The
process is exactly the same as setting the primary span, only you'll enter a different
concentration and click
Span2 CO
2
.
Recovering from a bad zero or span
If your attempt to zero or span does not go as planned, you can restore the factory
default zero and span settings. The information you need is provided on the cal-
ibration sheet (included with the instrument or available for download from
www.licor.com/env/support/). Under
Settings > Calibrations > Advanced
, enter the
factory zero and span values for your instrument.
4-8
Using the LI-870 CO₂/H₂O Analyzer
Summary of Contents for LI-870
Page 1: ...Using the LI 870 CO2 H2O Analyzer...
Page 2: ......
Page 12: ...Section 1 Overview of the LI 870 1 4 Using the LI 870 CO H O Analyzer...
Page 18: ...Section 2 Using the LI 870 2 6 Using the LI 870 CO H O Analyzer...
Page 30: ...Appendix A Specifications A 2 Using the LI 870 CO H O Analyzer...
Page 41: ......
