3 examples, 4 editing edlog programs, 1 editor keystrokes – Campbell Scientific PC208 Datalogger Support Software User Manual
Page 37
SECTION 2. EDLOG
2-5
LN
(natural logarithm)
EXP
(exponent of e; EXP(2) = e
2
)
RCP
(reciprocal; RCP(4) = 1/4 = 0.25)
ABS
(absolute value)
FRAC
(takes the fraction portion;
FRAC(2.78)=.78)
INT
(takes the integer portion;
INT(2.78)=2)
2.3.3.3 Examples
Below are examples of valid expressions:
Zee
= Vee+Ex
es
= tee^(-2)
Root
= SQRT(ABS(data))
avg
= (data1+data2+data3+data4+data5)/5
length = SQRT((adj^2)+(opp^2))
TempF = (TempC*1.8)+32
The following section of a CR10(X) datalogger
program uses an expression to convert
Temperature from Celsius to Fahrenheit:
Execution Interval = 10 sec
1:
Temperature (107) (P11)
01:
1
REPS
02:
2
Channel
03:
1
Excitation Channel
04:
2
Loc [TempC]
05:
1
Mult
06:
0
Offset
TempF = (TempC*1.8)+32
When this program is compiled, the .DLD file
contains the following instructions. The last 5
instructions calculate the expression.
1:
P11
(Temperature, 107)
1:
1
2:
2
3:
1
4:
2
5:
1.0
6:
0.0
2:
P31
(Z=X)
1:
2
2:
5
3:
P30
(Z=F)
1:
1.8
2:
0
3:
3
4:
P36
(Z=X*Y)
1:
3
2:
5
3:
5
5:
P30
(Z=F)
1:
32
2:
0
3:
3
6:
P33
(Z=X+Y)
1:
3
2:
5
3:
6
2.4 EDITING EDLOG PROGRAMS
2.4.1 EDITOR KEYSTROKES
The following keystrokes can be used to edit an
EDLOG program:
<ctrl> Home
View Top of File
<ctrl> End
View Bottom of File
<ctrl> PgUp
View Top of File
<ctrl> PgDn
View Bottom of File
<ctrl> n
Change to a Comment Line
<shift> <ctrl> n
Un-Comment a Line
PgUp
Page Up
PgDn
Page Down
Enter
Move to Next Field or Create
New Line
Tab
Move to Next Field or Line
<shift> Tab
Move to Previous Field or Line
<shift> Ins
Select an Instruction from a
Dialog Box