Campbell-scientific CS615 Water Content Reflectometer Bedienungsanleitung PDF herunterladen (Seite 11)

CS615 WATER CONTENT REFLECTOMETER

7

The calibration coefficients in the example

programs are demonstrative only. See Section

9 for information on calibration.

10.1 SAMPLE PROGRAM 1

Simple program using the Period Averaging

Instruction (P27) of a CR10 datalogger to read a

single CS615. The measurement is taken

hourly and the period and water content are

written to output storage.

CR10 CS615

Single-Ended

Channel 1 (SE1)

green

Control Port 5 (C5) orange

The red lead is connected to 12VDC and the

black and shield are connected to ground.

;{CR10}

;

*Table 1 Program

01: 5.0 Execution Interval (seconds)

1: If time is (P92) ;take reading hourly

1: 0000 Minutes (Seconds --) into a

2: 60 Interval (same units as above)

3: 30 Then Do

2: Do (P86)

1: 45 Set Port 5 High;enable CS615

3: Period Average (SE) (P27)

1: 1 Reps

2: 4 2 V Peak to Peak/200 kHz

Max. Freq.

3: 1 SE Channel

4: 10 No. of Cycles

5: 5 Timeout (units = 0.01 seconds)

6: 1 Loc [ 615period ]

7: .001 Mult

8: 0.0 Offset

4: Do (P86) ;disable CS615

1: 55 Set Port 5 Low

5: Polynomial (P55) ;convert period to water content

1: 1 Reps

2: 1 X Loc [ 615period ]

3: 2 F(X) Loc [ 615water ]

4: -0.187 C0

5: 0.037 C1

6: 0.335 C2

7: 0.0 C3

8: 0.0 C4

9: 0.0 C5

6: Do (P86)

1: 10 Set Output Flag High

7: Real Time (P77)

1: 0220 Day,Hour/Minute

8: Sample (P70)

1: 2 Reps

2: 1 Loc [615period]

9: End (P95)

End Program

10.2 SAMPLE PROGRAM 2

Simple program using the Pulse Count Instruction

(P3) of a CR10, CR500 or 21X datalogger to read

a single CS615. The Water Content

Reflectometer is queried when Flag 1 is set high.

The measurement is made and the period and

water content values are written to output storage.

CR10 or 21X CS615

Pulse Count

Channel 1 (P1)

green

Control Port 5 (C5) orange

The red lead is connected to 12VDC and the

black and shield are connected to ground.

;{CR10, CR500 or 21X}

;

*Table 1 Program

01: 1.0 Execution Interval (seconds)

1: If Flag/Port (P91) ;set flag1 high to initiate

reading

1: 11 Do if Flag 1 is High

2: 30 Then Do

2: Do (P86) ;enable CS615

1: 45 Set Port 5 High

3: Beginning of Loop (P87) ;delay for complete

count interval

1: 1 Delay

2: 2 Loop Count

4: End (P95)

5: Pulse (P3) ;determine CS615 output frequency

1: 1 Reps

2: 1 Pulse Input Channel

3: 21 Low Level AC, Output Hz

4: 1 Loc [ 615kHz ]

5: .001 Mult ;convert to kHz

6: 0.0 Offset

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 17 18

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