Campbell Scientific 253 253-L and 257-L (Watermark 200) Soil Matric Potential - Page 1

Campbell Scientific 253 Manual

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Section	Page
Revision and Copyright Information	1
Warranty	3
Assistance	4
Table of Contents	5
1. Introduction	7
2. Cautionary Statements	7
3. Initial Inspection	7
4. Quickstart	8
4.1 Installation/Removal	8
4.2 Use SCWin to Program Datalogger and Generate Wiring Diagram	9
4.2.1 257 SCWin Programming	9
4.2.2 253 SCWin Programming	13
5. Overview	18
6. Specifications	19
7. Operation	20
7.1 Wiring	20
7.1.1 257 Wiring	20
7.1.2 253 Wiring	20
7.2 Programming	21
7.2.1 CRBasic Dataloggers	21
7.2.1.1 BRHalf Instruction	21
7.2.1.2 Resistance Calculation	22
7.2.2 Edlog Dataloggers	22
7.2.2.1 Program Instruction 5	22
7.2.2.2 Program Instruction 59	22
7.2.3 Calculate Soil Water Potential	23
7.2.3.1 Linear Relationship	23
7.2.3.2 Non-Linear Relationship	24
7.2.3.3 Soil Water Matric Potential in Other Units	25
7.3 Example Programs	25
7.3.1 257 Program Examples	25
7.3.1.1 Program Example #1 — CR1000 with One 107 and One 257	25
7.3.1.2 Program Example #2 — CR10X with One 107 and One 257	26
7.3.2 253 Program Examples	28
7.3.2.1 Program Example #3 — Five 107 Temperature Probes and Five 253’s on AM16/32 and CR1000	28
7.3.2.2 Program Example #4 — Five 107 Temperature Probes and Five 253’s on AM16/32 and CR10X Using Non-Linear Equation	30
7.4 Interpreting Results	33
8. Troubleshooting	33
9. Reference	34

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253-L and 257-L

Soil Matric Potential Sensors

Revision: 9/13

Campbell Scientific, Inc.