LI-COR LI-6400, Руководство пользователя

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Defining User Variables
Useful Variables and Functions
Using the LI-6400 15-15
Useful Variables and Functions
Table 14-8 on page 14-19 contains variable names for the System Variables.
Table 15-3 gives some useful functions.
Table 15-3. Some Useful Functions and Operators
Function Description
+ Add
- Subtract
* Multiply
/ Divide
^ Raise to a power
LOG(x) natural log of x
LGT(x) log base 10
CHS(x) changes sign of x
ABS(x) absolute value of x
SQRT(x) square root of x
EXP(x) exponential.
SatVap(T) Returns saturation vapor pressure (kPa)
T - temp (C)
StdCond(E, Tf, Blc, P, W)
Returns stomatal conductance (mol m
-2
s
-1
)
E - transpiration (mol m
-2
s
-1
)
Tf - leaf temp (C)
Blc - boundary layer cond (mol m
-2
s
-1
)
P - atmos pressure (kPa)
W - ambient water vapor (mmol mol
-1
)
DewPoint(e) Returns the dewpoint temperature (C)
e - vapor pressure (kPa)
EB_DeltaT(Rn, Tw, Ta, Blc, E) Returns Tleaf - Tair from energy balance.
E - transpiration (mol m
-2
s
-1
)
Blc - boundary layer cond (mol m
-2
s
-1
)
Ta - Air temp (C)
Tw - Chamber wall temp (C)
Rn - Net radiation (W/m2)