Campbell Scientific CR200/CR200X-series Dataloggers User Manual
Page 131
Section 11. Programming Resource Library
will respond, however, all other probes will remain active until the timeout
period expires.
Example:
Probe: Water Content
Power Usage:
•
Quiescent: 0.25 mA
•
Measurement: 120 mA
•
Measurement Time: 15 s
•
Active: 66 mA
•
Timeout: 15 s
Probes 1, 2, 3, and 4 are connected to SDI-12 / Control Port 1.
The time line in
TABLE. Example Power Usage Profile for a Network of SDI-12
Probes
(p. 119) shows a 35 second power usage profile example.
Table 15. Example Power Usage Profile for a Network of SDI-12 Probes
Sec
Command
All
Probes
Awake
Time
Out
Expires
1 mA
2 mA
3mA
4mA
Total
mA
1
1M!
Yes
120
66
66
66
318
2
120
66
66
66
318
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
14
120
66
66
66
318
15
Yes
120
66
66
66
318
16
1D0!
Yes
66
66
66
66
264
17
66
66
66
66
264
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
29
66
66
66
66
264
30
Yes
66
66
66
66
264
31
0.25
0.25
0.25
0.25
1
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
35
0.25
0.25
0.25
0.25
1
119