Section 7. Installation
271
power draw would be excessive. Spreading sensors over several SDI-12 terminals
will help reduce power consumption.
Example Power Usage Profile for a Network of SDI-12 Probes
Time into
Measuremen
t Process (s)
Command
All
Probes
Awake
Time
Out
Expires
Probe 1
(mA
1
)
Probe 2
(mA
1
)
Probe 3
(mA
1
)
Probe 4
(mA
1
)
Total
mA
Sleep
0.25
0.25
0.25
0.25
1
1
1M!
Yes
120
66
66
66
318
2–14
120
66
66
66
318
15
Yes
120
66
66
66
318
16
1D0!
Yes
66
66
66
66
264
17–29
66
66
66
66
264
30
Yes
66
66
66
66
264
Sleep
0.25
0.25
0.25
0.25
1
1
Current use:
0.25 mA = sleep
66 mA = awake
120 mA = measuring
7.7.16 Compiling: Conditional Code
This feature circumvents system filters that look at file extensions for specific
loggers; it makes possible the writing of a single file of code to run on multiple
models of CRBasic dataloggers.
When a CRBasic user program is sent to the CR3000, an exact copy of the
program is saved as a file on the CPU: drive
(p. 443).
A binary version of the
program, the "operating program", is created by the CR3000 compiler and written
to Operating Memory
(p. 444,
This is the program version that runs
the CR3000.
CRBasic allows definition of conditional code, preceded by a hash character (#),
in the CRBasic program that is compiled into the operating program depending on
the conditional settings. In addition, all Campbell Scientific dataloggers (except
the CR200X) accept program files, or Include() instruction files, with .DLD
extensions.
Note Do not confuse CRBasic files with .DLD extensions with files of
.DLD type used by legacy Campbell Scientific dataloggers.
Summary of Contents for CR3000 Micrologger
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Page 485: ...Section 8 Operation 485 8 11 2 Data Display FIGURE 110 Keyboard and Display Displaying Data ...
Page 487: ...Section 8 Operation 487 FIGURE 112 CR1000KD Real Time Custom ...
Page 491: ...Section 8 Operation 491 FIGURE 116 Keyboard and Display File Edit ...
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Page 564: ...Section 11 Glossary 564 FIGURE 126 Relationships of Accuracy Precision and Resolution ...
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