Campbell Scientific AP200 CO2/H2O Atmospheric Profile System - Manual (Page 93)

Appendix E. Temperature Profile
The AP200 system can measure a temperature profile at up to eight levels, with
107-L temperature probes. These temperature probes are not part of the AP200
system – they must be ordered separately. See the Model 107 Temperature
Probe Instruction Manual, available from Campbell Scientific,
www.campbellscientific.com , for details.
The following section gives brief instructions for using these temperature
probes with the AP200 system.
Mounting
See the 107 Temperature Probe Instruction Manual for more detail on
installing the temperature probes. Normally, the probes will be mounted at the
same heights as the air sample intake assemblies. See Section 4.1.4, Other
Accessories, for more detailed discussion of the 107-L temperature probe and
its associated radiation shield. The assembled probe and shield are shown in
FIGURE E-1.
FIGURE E-1. 107-L temperature probe mounted with radiation shield
Wiring
The 107 temperature probes should be wired to consecutive single-ended
channels, starting at SE1. Any number of probes from 0 to 8 may, be used.
All temperature probes should use the VX1 excitation terminal.
Configuring the CRBasic program
The AP200 program has a constant, N_AirTemps that is used as a compile
switch to tell the program how many 107-L temperature probes are used. Set
this constant to zero (the default) to disable reading temperature probes or to a
number from 1 to 8 that indicates the number of probes to be measured.
E-1