Campbell Scientific CR7 Measurement and Control System User Manual

Campbell Scientific Measuring instruments

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CR7 MEASUREMENT AND CONTROL SYSTEM

INSTRUCTION MANUAL

REVISION: 7/97

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CR7 OPERATOR'S MANUALTABLE OF CONTENTS
- OVERVIEW
- PROGRAMMING
- DATA RETRIEVAL/COMMUNICATION
- PROGRAMMING EXAMPLES
- INSTRUCTIONS
- MEASUREMENTS
- INSTALLATION
- APPENDICES
SELECTED OPERATING DETAILS
CAUTIONARY NOTES
CR7 MEASUREMENT AND CONTROL SYSTEM OVERVIEW
- OV1. PHYSICAL DESCRIPTION
- OV2. MEMORY AND PROGRAMMING CONCEPTS
- OV3. PROGRAMMING THE CR7
- OV4. PROGRAMMING EXAMPLE
- OV5. DATA RETRIEVAL OPTIONS
- OV6. SPECIFICATIONS
SECTION 1. FUNCTIONAL MODES
- 1.1 PROGRAM TABLES - *1, *2, AND *3 MODES
- 1.2 SETTING AND DISPLAYING THE CLOCK - *5 MODE
- 1.3 DISPLAYING AND ALTERING INPUT MEMORY OR FLAGS - *6 MODE
- 1.4 COMPILING AND LOGGING DATA - *0 MODE
- 1.5 MEMORY ALLOCATION - *A
  - 1.5.1 INTERNAL MEMORY
  - 1.5.2 *A MODE
- 1.6 MEMORY TESTING AND SYSTEM STATUS - *B
- 1.7 *C MODE -- SECURITY
- 1.8 *D MODE -- SAVE OR LOAD PROGRAM
  - 1.8.1 TRANSFER TO COMPUTER/PRINTER
  - 1.8.2 PROGRAM TRANSFER WITH STORAGE MODULE
SECTION 2. INTERNAL DATA STORAGE
- 2.1 FINAL STORAGE AREAS, OUTPUT ARRAYS, AND MEMORY POINTERS
- 2.2 DATA OUTPUT FORMAT AND RANGE LIMITS
  - 2.2.1 RESOLUTION AND RANGE LIMITS
  - 2.2.2 INPUT AND INTERMEDIATE STORAGE DATA FORMAT
- 2.3 DISPLAYING STORED DATA ON KEYBOARD/DISPLAY - *7 MODE
SECTION 3. INSTRUCTION SET BASICS
- 3.1 PARAMETER DATA TYPES
- 3.2 REPETITIONS/CARD NUMBER
- 3.3 ENTERING NEGATIVE NUMBERS
- 3.4 INDEXING INPUT LOCATIONS
- 3.5 VOLTAGE RANGE AND OVERRANGE DETECTION
- 3.6 OUTPUT PROCESSING
- 3.7 USE OF FLAGS: OUTPUT AND PROGRAM CONTROL
- 3.8 PROGRAM CONTROL LOGICAL CONSTRUCTIONS
- 3.9 INSTRUCTION MEMORY AND EXECUTION TIME
- 3.10 ERROR CODES
SECTION 4. EXTERNAL STORAGE PERIPHERALS
- 4.1 ON-LINE DATA TRANSFER - INSTRUCTION 96, *4 MODE
  - 4.1.1 INSTRUCTION 96
  - 4.1.2 *4 MODE
- 4.2 MANUALLY INITIATED DATA OUTPUT - *9 MODE
  - 4.2.1 MANUAL STORAGE MODULE OR PRINTER DUMP - *9 MODE
- 4.3 STORAGE MODULE
- 4.4 PRINTER OUTPUT FORMATS
SECTION 5. TELECOMMUNICATIONS
- 5.1 TELECOMMUNICATIONS COMMANDS
- 5.2 REMOTE PROGRAMMING OF THE CR7
SECTION 6. CS I/O 9 PIN SERIAL INPUT/OUTPUT
- 6.1 PIN DESCRIPTION
- 6.2 ENABLING PERIPHERALS
- 6.3 INTERRUPTING DATA TRANSFER TO STORAGE PERIPHERALS
- 6.4 TELECOMMUNICATIONS - MODEM PERIPHERALS
- 6.5 INTERFACING WITH COMPUTERS, TERMINALS, AND PRINTERS
SECTION 7. MEASUREMENT PROGRAMMING EXAMPLES
- 7.1 SINGLE ENDED VOLTAGE - LI200S SILICON PYRANOMETER
- 7.2 DIFFERENTIAL VOLTAGE MEASUREMENT
- 7.3 THERMOCOUPLE TEMPERATURES USING 723-T REFERENCE
- 7.4 THERMOCOUPLE TEMPERATURES USING AN EXTERNAL REFERENCE JUNCTION
- 7.5 THERMOCOUPLES FOR DIFFERENTIAL TEMPERATURE MEASUREMENT
- 7.6 TEMPERATURE WITH CALIBRATED THERMOCOUPLES
- 7.7 107 TEMPERATURE PROBE
- 7.8 207 TEMPERATURE AND RH PROBE
- 7.9 ANEMOMETER WITH PHOTOCHOPPER OUTPUT
- 7.10 TIPPING BUCKET RAINGAGE WITH LONG LEADS
- 7.11 100 OHM PRT IN 4 WIRE HALF BRIDGE
- 7.12 100 OHM PRT IN 3 WIRE HALF BRIDGE
- 7.13 100 OHM PRT IN 4 WIRE FULL BRIDGE
- 7.14 PRESSURE TRANSDUCER - 4 WIRE FULL BRIDGE
- 7.15 LYSIMETER - 6 WIRE LOAD CELL
- 7.16 227 GYPSUM SOIL MOISTURE BLOCK
- 7.17 NONLINEAR THERMISTOR IN HALF BRIDGE (CAMPBELL SCIENTIFIC MODEL 101)
SECTION 8. PROCESSING AND PROGRAM CONTROL EXAMPLES
- 8.1 COMPUTATION OF RUNNING AVERAGE
- 8.2 RAINFALL INTENSITY
- 8.3 SUB 1 MINUTE OUTPUT INTERVAL SYNCHED TO REAL TIME
- 8.4 ANALOG OUTPUT TO STRIP CHART
- 8.5 CONVERTING 0-360 WIND DIRECTION OUTPUT TO 0-540 FOR STRIP CHART
- 8.6 COVARIANCE CORRELATION PROGRAMMING EXAMPLE
SECTION 9. INPUT/OUTPUT INSTRUCTIONS
SECTION 10. PROCESSING INSTRUCTIONS
SECTION 11. OUTPUT PROCESSING INSTRUCTIONS
SECTION 12. PROGRAM CONTROL INSTRUCTIONS
SECTION 13. CR7 MEASUREMENTS
- 13.1 FAST AND SLOW MEASUREMENT SEQUENCE
- 13.2 SINGLE ENDED AND DIFFERENTIAL VOLTAGE MEASUREMENTS
- 13.3 THE EFFECT OF SENSOR LEAD LENGTH ON THE SIGNAL SETTLING TIME
- 13.4 THERMOCOUPLE MEASUREMENTS
  - 13.4.1 ERROR ANALYSIS
  - 13.4.2 USE OF EXTERNAL REFERENCE JUNCTION OR JUNCTION BOX
- 13.5 BRIDGE RESISTANCE MEASUREMENTS
- 13.6 RESISTANCE MEASUREMENTS REQUIRING AC EXCITATION
- 13.7 PULSE COUNT MEASUREMENTS
SECTION 14. INSTALLATION
- 14.1 ENVIRONMENTAL ENCLOSURE, CONNECTORS AND JUNCTION BOXES
- 14.2 SYSTEM POWER REQUIREMENTS AND OPTIONS
- 14.3 HUMIDITY EFFECTS AND CONTROL
- 14.4 RECOMMENDED GROUNDING PRACTICES
  - 14.4.1 PROTECTION FROM LIGHTNING
  - 14.4.2 EFFECT ON MEASUREMENTS: COMMON MODE RANGE
- 14.5 USE OF DIGITAL CONTROL PORTS FOR SWITCHING RELAYS
15. I/O CARD ADDRESSING AND MULTIPLE I/O MODULES
- 15.1 I/O CARD IDENTIFICATION NUMBER DECODING
  - 15.1.1 ASSIGNING CARD IDENTIFICATION NUMBERS
  - 15.1.2 PLACING JUMPERS IN THEIR PROPER LOCATIONS
- 15.2 USE OF MULTIPLE I/O MODULES
  - 15.2.1 PROGRAMMING CONSIDERATIONS
  - 15.2.2 SETTING BAUD RATE BETWEEN I/O AND CONTROL MODULES
APPENDIX A. GLOSSARY
APPENDIX B. CR7 PROM SIGNATURES FOR SYSTEMS EQUIPPED WITH STANDARD SOFTWARE
APPENDIX C. BINARY TELECOMMUNICATIONS
- C.1 TELECOMMUNICATIONS COMMAND WITH BINARY RESPONSES
- C.2 FINAL STORAGE FORMAT
  - C.3 GENERATION OF SIGNATURE
APPENDIX D. CALIBRATION PROCEDURES
- D.1 VOLTAGE REFERENCE CALIBRATION PROCEDURE
- D.2 CLOCK CALIBRATION PROCEDURE
LIST OF TABLES
LIST OF FIGURES
CR7 INDEX

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