Campbell Scientific EnviroSCAN Sentek Water Content Profile Probe - Manual (Page 10)

EnviroSMART TM Soil Water Content Profile Probes
8.2 Cable Installation
Securely tighten the gland nut through which the cable passes into the probe cap.
Inject a small amount of silicon sealant into the sensor end of the cable to ensure
that water or water vapor will not pass into the probe.
9. Datalogger Programming
Example program corresponds to setup example in Appendices A and B.
Sample CR1000 Program
Shaded portions of program can be omitted if TriSCAN sensor options are not
used.
‘CR1000 Datalogger
‘Program Author: Campbell Scientific, Inc.
‘Date: 04-12-06
‘Description:
Program measures 1 EnviroSMART / TriSCAN probe with 8 sensors or 1
EasyAG
‘
TriSCAN probe with 4 sensors. -1000 is loaded as the "measurement" for
‘ non-existant sensors. Program measures scaled frequencies, calculates
‘ water contents, and stores scaled frequencies, water contents, and
‘ volumetric ion contents separately. Scaled frequencies are stored with an
‘ "array identifier" leading 8 data values per record followed by 8 VIC per
‘ record, with the record ending with zero rain and irrigation values for
‘ compatibility with DBLOAD & Irrimax software.
‘Assumptions:
EnviroSMART or EasyAG probe SDI-12 interface is configured to output
‘ scaled frequencies
‘Wiring:
EnviroSMART / EasyAG 12 Volts (Pin 1) -------- CR1000 12 V
‘ EnviroSMART / EasyAG Ground (Pin 2) ------- CR1000 Ground
‘ EnviroSMART / EasyAG Signal (Pin 3) --------- C7
‘
Rain Gage Pulse Out -------------------------------- CR1000 P2
‘ Rain Gage Ground----------------------------------- CR1000 Ground
‘Program Declarations
‘Public (Displayed) Variables
Public ES1_ID(1)
Public ES1_SF(8)
Public ES1_WC(8)
Public ES1_VIC(8)
Public Rain_mm
Public Irrig_mm
‘EasyAG / EnviroSMART Scale Frequency to Water Content Calibration Co-efficients
Const a = .1957
Const b = .404
Const c = .02852
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