Campbell CR200 - Section 12. Memory and Data Storage; 12.1 Data Storage

Section 11. Programming Resource Library
119
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