Campbell CR7 Manual de instrucciones Pagina 133
- Pagina / 186
- Tabla de contenidos
- MARCADORES
Valorado. / 5. Basado en revisión del cliente
SECTION 13. CR7 MEASUREMENTS
13-9
TABLE 13.3-7. Source Resistances and Signal Levels for YSI #44032 Thermistor Configurations
Shown in Figure 13.3-7 (2V Excitation)
- - - A - - - - B - - - - C - - -
TR
s
R
o
V
s
(mV) R
o
@P R
o
V
s
(mV)
(kohms) (kohms) (kohms) (kohms)
-40 884.6 29.0 164 30.0 1 5.5
-20 271.2 27 498 27.8 1 16.5
0 94.98 22.8 1200 23.4 1 39.5
+25 30.00 15.0 2500 15.2 1 82.0
+40 16.15 10.5 3250 10.6 1 106.0
+60 7.60 6.1 3989 6.1 1 129.5
3. Where possible run excitation leads and
signal leads in separate shields to minimize
transients.
4. AVOID PVC INSULATED CONDUCTORS
to minimize the effect of dielectric
absorption on input settling time.
5. Use the CR7 to measure the input settling
error associated with a given configuration.
For example assume long leads are
required but the lead capacitance, C
w
, is
unknown. Configure R
f
on a length of cable
similar to the measurement. Leave the
sensor end open as shown in Figure 13.3-8
and measure the result using the same
instruction parameters to be used with the
sensor. The measured deviation from 0V is
the input settling error.
- 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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