4 sample program 4 – Campbell Scientific CS615 Water Content Reflectometer User Manual
Page 13
CS615 WATER CONTENT REFLECTOMETER
9
;delay loop to wait remainder of execution
;interval once AM416 is clocked, and one
;complete execution interval for precise
;pulse count interval.
7: Beginning of Loop (P87)
1:
1
Delay
2:
2
Loop Count
8: End (P95) ;end of delay loop
9: Pulse (P3) ;read CS615s
1:
3
Reps
2:
1
Pulse Input Channel
3:
21
Low Level AC, Output Hz
4:
1
Loc [ kHz#1 ]
5:
.001
Mult
6:
0.0
Offset
;convert frequencies to period. 0.001 multiplier
;converts kHz to milliseconds.
10: Z=1/X (P42)
1:
1
X Loc [ kHz#1 ]
2:
4
Z Loc [ period#1 ]
11: Z=1/X (P42)
1:
2
X Loc [ kHz#2 ]
2:
5
Z Loc [ period#2 ]
12: Z=1/X (P42)
1:
3
X Loc [ kHz#3 ]
2:
6
Z Loc [ period#3 ]
13: Polynomial (P55) ;apply calibration
1:
3
Reps
2:
4
X Loc [ period#1 ]
3:
7--
F(X) Loc [ water#1 ]
4:
-.187
C0
5:
.037
C1
6:
.335
C2
7:
0.0
C3
8:
0.0
C4
9:
0.0
C5
14: End (P95)
15: Do (P86) ;set CS615 enable low
1:
53
Set Port 3 Low
16: Do (P86) ;set AM416 reset low
1:
51
Set Port 1 Low
17: Do (P86)
1:
10
Set Output Flag High
18: Sample (P70)
1:
48
Reps
2:
7
Loc [ water#1 ]
19: End (P95)
End Program
10.4 SAMPLE PROGRAM 4
Program using the Period Averaging Instruction
(P27) of CR10 datalogger and AM416
multiplexer to read 48 CS615 probes
CAUTION:
1.
The probe rods of the CS615 are
essentially antennae which transmit and
receive radio waves. Interference can
occur when enabled probes are in close
proximity and electrical conductivity of
the measured medium is high.
Generally, interference is not a problem
when the distance between enabled
probes is greater than 20 cm. It may be
necessary to configure probe
placement and multiplexer connection
to alleviate probe interaction.
;{CR10}
;
*Table 1 Program
01:
1.0
Execution Interval (seconds)
;Once an Hour, Read Probes
1: If time is (P92)
1:
0
Minutes into a
2:
60
Minute Interval
3:
30
Then Do
; enable multiplexer
2: Do (P86)
1:
41
Set Port 1 High
; turn on port that enables 615s
3: Do (P86)
1:
43
Set Port 3 High
;Multiplexer loop
4: Beginning of Loop (P87)
1:
0
Delay
2:
16
Loop Count
; clock multiplexer
5: Do (P86)
1:
72
Pulse Port 2