Campbell-scientific Sentek EnviroSCAN EasyAG SDI-12 Manual v 3.4 Manual de usuario Pagina 23

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EnviroSMART & EasyAG SDI-12 Probe Manual
Copyright © 1991 2003 Sentek Pty Ltd All rights reserved Page 18
Total current consumption: 250µA @ sleep
66mA @ standby
105mA @ sampling (Moisture)
130mA @ sampling (TriSCAN™)
Time to sample 1 sensor: 1.2 seconds maximum (Moisture only)
2.4 seconds maximum (TriSCAN™)
Maximum sensors supported: 16 Moisture sensors or
16 TriSCAN sensors
Figure 4: EnviroSMART® SDI-12 probe interface board layout
1 6
TTL Port
3
1
SDI
-
12 data
Ground
+V
in
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