LI-COR LI7200RS, Instruction Manual

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Section 1. General Information
The LI-7200/RS computes dry mole fractions of CO
2
or H
2
O in the air sample cal-
culated using high speed measurements. These variables account for changes in air
density due to the water vapor content, pressure, and temperature of the sample air.
CO
2
dry and H
2
O dry are computed as mole of gas per mole of dry air, and can be
used for computing eddy covariance fluxes without the need for density corrections
(Webb et al., 1980).
Important: There are fine-wire thermocouples that measure air temperature at
the air inlet and outlet ports. Do not insert long objects (e.g., narrow tubing or
screwdriver) into the inlet or outlet ports. Doing so will damage the ther-
mocouples.
What’s What
If you have just taken delivery of your LI-7200RS, check the packing list to verify
that you have received everything that was ordered.
Note:
You need the PC software to configure the instrument. Download it from
the LI-COR technical support web site: www.licor.com/env/support. Select your
instrument and you'll find the software downloads.
Spare Parts Kits
The LI-7200/RS sensor head spare parts kit (part 7200-028) includes accessories and
replacement parts for the sensor head. The LI-7550 Analyzer Interface Unit also has
a spare parts kit (part 9975-023). It includes the cables and mounting bracket. As
you become familiar with the analyzer you will learn which items to keep close at
hand and which items can be stored away.
Description Qty. Part Number
LI-7200/RS Spares Kit 1 7200-028
Bev-a-line Tubing (4.6 m; 15 ft) 1 222-10770
Urethane Tubing (5.2 m; 17 ft) 1 222-00302
3/8-1/4” adapter 1 300-10771
Sensor Head Mounting Post (yellow dampers) 1 9972-046
Sock Tip Swabs 4 610-05315
Replacement Temperature Thermocouple 2 9972-007
1-2 LI-7200RS Enclosed CO₂/H₂O Analyzer