Campbell CR7 Manuale delle Istruzioni Pagina 7
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TABLE OF CONTENTS
iii
PROGRAMMING EXAMPLES
7. MEASUREMENT PROGRAMMING EXAMPLES
7.1 Single Ended Voltage-LI200S Silicon Pyranometer................................................................7-1
7.2 Differential Voltage Measurement...........................................................................................7-1
7.3 Thermocouple Temperatures Using 723-T Reference ...........................................................7-2
7.4 Thermocouple Temperatures Using an External Reference Junction....................................7-2
7.5 Thermocouples for Differential Temperature Measurement...................................................7-3
7.6 Temperature with Calibrated Thermocouples.........................................................................7-4
7.7 107 Temperature Probe..........................................................................................................7-5
7.8 207 Temperature and RH Probe.............................................................................................7-5
7.9 Anemometer with Photochopper Output.................................................................................7-6
7.10 Tipping Bucket Raingage with Long Leads.............................................................................7-6
7.11 100 ohm PRT in 4 Wire Half-Bridge........................................................................................7-7
7.12 100 ohm PRT in 3 Wire Half-Bridge........................................................................................7-8
7.13 100 ohm PRT in 4 Wire Full-Bridge ........................................................................................7-9
7.14 Pressure Transducer-4 Wire Full-Bridge ..............................................................................7-10
7.15 Lysimeter-6 Wire Load Cell...................................................................................................7-11
7.16 227 Gypsum Soil Moisture Block ..........................................................................................7-13
7.17 Nonlinear Thermistor in Half Bridge (CSI Model 101)...........................................................7-14
8. PROCESSING AND PROGRAM CONTROL EXAMPLES
8.1 Computation of Running Average...........................................................................................8-1
8.2 Rainfall Intensity......................................................................................................................8-2
8.3 SUB 1 Minute Output Interval Synched to Real Time .............................................................8-3
8.4 Analog Output to Strip Chart ...................................................................................................8-4
8.5 Converting 0-360 Wind Direction Output to 0-540 for Strip Chart...........................................8-5
8.6 Covariance Correlation Programming Example......................................................................8-6
INSTRUCTIONS
9. INPUT/OUTPUT INSTRUCTIONS.....................................................................................9-1
10. PROCESSING INSTRUCTIONS......................................................................................10-1
11. OUTPUT PROCESSING INSTRUCTIONS...................................................................11-1
12. PROGRAM CONTROL INSTRUCTIONS......................................................................12-1
MEASUREMENTS
13. CR7 MEASUREMENTS
13.1 Fast and Slow Measurement Sequence ...............................................................................13-1
13.2 Single-Ended and Differential Voltage Measurements .........................................................13-1
13.3 The Effect of Sensor Lead Length on the Signal Settling Time ............................................13-3
13.4 Thermocouple Measurements ............................................................................................13-11
13.5 Bridge Resistance Measurements ......................................................................................13-15
13.6 Resistance Measurements Requiring AC Excitation ..........................................................13-19
13.7 Pulse Count Measurements................................................................................................13-20
- INSTRUCTION MANUAL 1
- WARRANTY AND ASSISTANCE 3
- CR7 OPERATOR'S MANUAL 5
- TABLE OF CONTENTS 5
- OVERVIEW 5
- PROGRAMMING 6
- DATA RETRIEVAL/COMMUNICATION 6
- PROGRAMMING EXAMPLES 7
- INSTRUCTIONS 7
- INSTALLATION 8
- APPENDICES 8
- SELECTED OPERATING DETAILS 9
- CAUTIONARY NOTES 10
- OV1. PHYSICAL DESCRIPTION 11
- OV2. MEMORY AND PROGRAMMING 13
- CONCEPTS 13
- 720 I/O MODULE 14
- OV3. PROGRAMMING THE CR7 17
- OV4. PROGRAMMING EXAMPLE 19
- 32 give the 20
- , advance to next 21
- OV5. DATA RETRIEVAL OPTIONS 25
- 700X CONTROL MODULE 26
- OV6. SPECIFICATIONS 27
- SECTION 1. FUNCTIONAL MODES 29
- CLOCK - *5 MODE 30
- MEMORY OR FLAGS - *6 MODE 30
- 1.5 MEMORY ALLOCATION - *A 32
- STATUS - *B 33
- 1.7 *C MODE -- SECURITY 34
- 1.8 *D MODE -- SAVE OR LOAD 35
- ARRAYS, AND MEMORY POINTERS 39
- 2.2 DATA OUTPUT FORMAT AND 40
- RANGE LIMITS 40
- KEYBOARD/DISPLAY - *7 MODE 41
- 3.1 PARAMETER DATA TYPES 43
- 3.2 REPETITIONS/CARD NUMBER 43
- 3.4 INDEXING INPUT LOCATIONS 44
- 3.5 VOLTAGE RANGE AND 44
- OVERRANGE DETECTION 44
- 3.6 OUTPUT PROCESSING 44
- PROGRAM CONTROL 45
- 3.8 PROGRAM CONTROL LOGICAL 46
- CONSTRUCTIONS 46
- 3.9 INSTRUCTION MEMORY AND 48
- EXECUTION TIME 48
- 3.10 ERROR CODES 51
- 4.1 ON-LINE DATA TRANSFER 53
- INSTRUCTION 96, *4 MODE 53
- 4.2 MANUALLY INITIATED DATA 54
- OUTPUT - *9 MODE 54
- 4.3 STORAGE MODULE 55
- 4.4 PRINTER OUTPUT FORMATS 56
- 5.1 TELECOMMUNICATIONS 59
- COMMANDS 59
- 6.1 PIN DESCRIPTION 63
- SILICON PYRANOMETER 69
- 7.2 DIFFERENTIAL VOLTAGE 69
- MEASUREMENT 69
- USING 723-T REFERENCE 70
- USING AN EXTERNAL REFERENCE 70
- JUNCTION 70
- DIFFERENTIAL TEMPERATURE 71
- 7.5 THERMOCOUPLES FOR 71
- THERMOCOUPLES 72
- 7.7 107 TEMPERATURE PROBE 73
- 7.9 ANEMOMETER WITH 74
- PHOTOCHOPPER OUTPUT 74
- 7.10 TIPPING BUCKET RAINGAGE 74
- WITH LONG LEADS 74
- 7.14 PRESSURE TRANSDUCER - 4 78
- WIRE FULL BRIDGE 78
- 7.17 NONLINEAR THERMISTOR IN 82
- HALF BRIDGE (CAMPBELL 82
- SCIENTIFIC MODEL 101) 82
- 8.1 COMPUTATION OF RUNNING 83
- 8.2 RAINFALL INTENSITY 84
- SYNCHED TO REAL TIME 85
- 8.4 ANALOG OUTPUT TO STRIP 86
- 8.5 CONVERTING 0-360 WIND 87
- DIRECTION OUTPUT TO 0-540 FOR 87
- STRIP CHART 87
- Parameters 6 101
- SECTION 13. CR7 MEASUREMENTS 125
- LENGTH ON THE SIGNAL SETTLING 127
- /(R ( )) 129
- 13.4 THERMOCOUPLE 135
- MEASUREMENTS 135
- 13.5 BRIDGE RESISTANCE 139
- Excitation 141
- Measurement Sequence 141
- 13.6 RESISTANCE MEASUREMENTS 143
- REQUIRING AC EXCITATION 143
- MULTIPLE I/O MODULES 144
- SECTION 14. INSTALLATION 145
- AND OPTIONS 146
- 14.3 HUMIDITY EFFECTS AND 149
- 14.4 RECOMMENDED GROUNDING 149
- PRACTICES 149
- 14.5 USE OF DIGITAL CONTROL 150
- PORTS FOR SWITCHING RELAYS 150
- 15.1 I/O CARD IDENTIFICATION 151
- NUMBER DECODING 151
- APPENDIX A. GLOSSARY 159
- This is a blank page 162
- WITH STANDARD SOFTWARE 163
- C.1 TELECOMMUNICATIONS 165
- COMMAND WITH BINARY 165
- RESPONSES 165
- C.2 FINAL STORAGE FORMAT 167
- D.1 VOLTAGE REFERENCE 171
- CALIBRATION PROCEDURE 171
- D.2 CLOCK CALIBRATION 172
- PROCEDURE 172
- FIGURE D.2-2. CR7X CPU Card 174
- LIST OF TABLES 175
- LIST OF FIGURES 177
- 13. CR7 MEASUREMENTS 178
- 14. INSTALLATION 178
- CR7 INDEX 179
- CR7 INDEX 186
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