User Manual

Table of Contents

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1. Introduction.................................................................1

2. Cautionary Statements...............................................1

3. Initial Inspection .........................................................1

4. Quickstart ....................................................................2

4.1 Installation/Removal ............................................................................2

4.2 Use SCWin to Program Datalogger and Generate Wiring Diagram ....3

4.2.1 257 SCWin Programming.............................................................3

4.2.2 253 SCWin Programming.............................................................7

5. Overview....................................................................12

6. Specifications ...........................................................13

7. Operation...................................................................14

7.1 Wiring ................................................................................................14

7.1.1 257 Wiring ..................................................................................14

7.1.2 253 Wiring ..................................................................................14

7.2 Programming......................................................................................15

7.2.1 CRBasic Dataloggers ..................................................................15

7.2.1.1 BRHalf Instruction ...........................................................15

7.2.1.2 Resistance Calculation .....................................................16

7.2.2 Edlog Dataloggers.......................................................................16

7.2.2.1 Program Instruction 5.......................................................16

7.2.2.2 Program Instruction 59.....................................................16

7.2.3 Calculate Soil Water Potential ....................................................17

7.2.3.1 Linear Relationship ..........................................................17

7.2.3.2 Non-Linear Relationship ..................................................18

7.2.3.3 Soil Water Matric Potential in Other Units ......................19

7.3 Example Programs .............................................................................19

7.3.1 257 Program Examples ...............................................................19

7.3.1.1 Program Example #1 — CR1000 with One 107 and

One 257.........................................................................19

7.3.1.2 Program Example #2 — CR10X with One 107 and

One 257.........................................................................20

7.3.2 253 Program Examples ...............................................................22

7.3.2.1 Program Example #3 — Five 107 Temperature Probes

and Five 253’s on AM16/32 and CR1000 ....................22