Campbell Scientific Sentek EnviroSCAN EasyAG SDI-12 Manual v 3.4 - Manual (Page 5)

EnviroSMART & EasyAG SDI-12 Probe Manual
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Table of Figures
Figure 1: Intelligent Probe Configuration Utility software......................................................................... 2
Figure 2: EnviroSMART® and EasyAG® SDI-12 probe interface communication power sequence ........ 6
Figure 3: Voltage levels on the SDI-12 line during an Acknowledge Active command (a!)........................ 7
Figure 4: EnviroSMART® SDI-12 probe interface board layout.............................................................18
Figure 5: EasyAG® SDI-12 probe interface board layout ........................................................................20
Figure 6: SDI-12 interface circuit diagram...............................................................................................21
Figure 7: TTL interface circuit diagram...................................................................................................21
Figure 8: EnviroSMART® SDI-12 probe interface old revision board layout..........................................22
Figure 9: Measurements using metric units..............................................................................................23
Figure 10: Measurements using imperial units.........................................................................................24
Figure 11: Measurements of multiple sensors on the probe ......................................................................24