Campbell CR23X Specifikace Strana 211
- Strana / 374
- Tabulka s obsahem
- KNIHY
Hodnocené. / 5. Na základě hodnocení zákazníků
SECTION 13. CR23X MEASUREMENTS
13-11
5. Use the CR23X to measure the input
settling error associated with a given
configuration. For example, assume long
leads are required but the lead capacitance,
Cw, is unknown. Configure Rf 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.
6. Most Campbell Scientific sensors are
configured with a small bridge resistor, R
f
,
(typically 1 kohm) to minimize the source
resistance. If the lead length of a Campbell
Scientific sensor is extended by connecting
to the pigtails directly, the effect of the lead
resistance, R
l
, on the signal must be
considered. Figure 13.3-9 shows a
Campbell Scientific Model 107 sensor with
500 feet of extension lead connected
directly to the pigtails. Normally the signal
voltage is proportional to R
f
/(R
s
+R
b
+R
f
), but
when the pigtails are extended, the signal is
proportional to (R
f
+R
l
)/(R
s
+R
b
+R
f
+R
l
). R
l
is
much smaller than the other terms in the
denominator and can be discarded. The
effect on the signal can be analyzed by
taking the ratio of the signal with extended
leads, V
sl
to the normal signal, V
s
:
V
sl
/V
s
= (R
f
+R
l
)/R
f
Plugging in values of R
f
=1k and R
l
=.012k
(500' at 23 ohms/1000', Table 13.3-2) gives
an approximate 1% error in the signal with
extended leads. Converting the error to °C
gives approximately a 0.33=°C error at 0°C,
0.53°C error at 20°C, and a 0.66°C error at
40°C. The error can be avoided by
maintaining the pigtails on the CR23X end
of the extended leads because R
l
does not
add to the bridge completion resistor, R
f
,
and its influence on the thermistor
resistance is negligible.
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
- CR23X Micrologge 1
- Warranty and Assistance 2
- TABLE OF CONTENTS 3
- DATA RETRIEVAL/COMMUNICATION 4
- PROGRAM EXAMPLES 4
- INSTRUCTIONS 5
- INSTALLATION 6
- APPENDICES 6
- CR23X MANUALS 7
- CR23X TABLE OF CONTENTS 8
- SELECTED OPERATING DETAILS 9
- CAUTIONARY NOTES 10
- CR23X MICROLOGGER OVERVIEW 11
- CR23X MICROLOGGER 13
- OV2. MEMORY AND PROGRAMMING 15
- CONCEPTS 15
- OV4. PROGRAMMING THE CR23X 23
- OV5. PROGRAMMING EXAMPLES 24
- OV6. DATA RETRIEVAL OPTIONS 31
- OV7. SPECIFICATIONS 33
- 1.5 MEMORY ALLOCATION 39
- FIGURE 1.5-1. CR23X Memory 41
- STATUS 43
- MODE -- SECURITY 45
- MODE -- SAVE OR LOAD 45
- ARRAYS, AND MEMORY POINTERS 51
- 3.1 PARAMETER DATA TYPES 55
- 3.2 REPETITIONS (Reps) 55
- CONTROL PORTS 55
- 3.5 VOLTAGE RANGE AND 56
- OVERRANGE DETECTION 56
- 3.6 OUTPUT PROCESSING 56
- PROGRAM CONTROL 57
- 3.8 PROGRAM CONTROL LOGICAL 58
- CONSTRUCTIONS 58
- 3.9 INSTRUCTION MEMORY AND 59
- EXECUTION TIME 59
- 3.10 ERROR CODES 63
- 4.1 ON-LINE DATA TRANSFER 65
- INSTRUCTION 96 65
- 4.2 MANUALLY INITIATED DATA 67
- OUTPUT 67
- 4.3 PRINTER OUTPUT FORMATS 67
- 4.4 STORAGE MODULE 68
- 5.1 TELECOMMUNICATIONS 73
- COMMANDS 73
- (OPTICALLY ISOLATED) 79
- 6.3 USE OF INSTRUCTION 96 87
- 7.1 SINGLE-ENDED VOLTAGE/ 89
- 7.5 107 TEMPERATURE PROBE 92
- 7.6 ANEMOMETER WITH 92
- PHOTOCHOPPER OUTPUT 92
- WITH LONG LEADS 93
- 7.11 PRESSURE TRANSDUCER - 4 96
- WIRE FULL BRIDGE 96
- 7.12 LYSIMETER - 6 WIRE FULL 97
- 7.14 NONLINEAR THERMISTOR IN 100
- HALF BRIDGE (CAMPBELL 100
- SCIENTIFIC MODEL 101) 100
- CR23X & AVW1 103
- PRESSURE TRANSDUCER 105
- CONNECTIONS 107
- CURS100 TERMINAL INPUT 108
- 7.17 4 TO 20 MA SENSOR USING 108
- 12V Power Out 109
- This is a blank page 110
- 8.1 COMPUTATION OF RUNNING 111
- 8.2 RAINFALL INTENSITY 112
- 8.3 USING CONTROL PORTS AND 113
- LOOP TO RUN AM416 113
- MULTIPLEXER 113
- SYNCHED TO REAL TIME 115
- PORTS (RAIN GAGE) 115
- 8.6 SDM-A04 ANALOG OUTPUT 116
- MULTIPLEXER TO STRIP CHART 116
- 8.7 CONVERTING 0-360 WIND 117
- DIRECTION OUTPUT TO 0-540 FOR 117
- STRIP CHART 117
- - SAVING DATA PRIOR TO EVENT 118
- 8.10 COVARIANCE CORRELATION 121
- PROGRAMMING EXAMPLE 121
- 04: Z=X*F (P37) 123
- 8.11 FAST FOURIER TRANSFORM 125
- EXAMPLES 125
- POWER SENSORS 132
- Silicon diodes 152
- Parameters 6 155
- Input locations altered: 1 160
- This is a blankpage 164
- This is a blankp age 188
- SEQUENCE 201
- 16.67 mS 60 Hz Reject 202
- 20.00 mS 50 Hz Reject 202
- LENGTH ON THE SIGNAL SETTLING 204
- HI OR LO 205
- (/((.(-45 0* * * * + * * 208
- 10 610 3310 4110 1000 208
- 13.5 BRIDGE RESISTANCE 220
- MEASUREMENTS 220
- 13.6 RESISTANCE MEASUREMENTS 224
- REQUIRING AC EXCITATION 224
- 13.7 CALIBRATION PROCESS 225
- 14.1 PROTECTION FROM THE 227
- ENVIRONMENT 227
- 14.2 POWER REQUIREMENTS 228
- 10 D-TYPE ALKALINE BATTERIES 230
- 14.4 SOLAR PANELS 231
- TO THE CR23X WIRING PANEL 232
- 14.6 VEHICLE POWER SUPPLY 232
- 14.7 CR23X Grounding 233
- 14.8 POWERING SENSORS AND 235
- PERIPHERALS 235
- 14.9 CONTROLLING POWER TO 236
- SENSORS AND PERIPHERALS 236
- 14.10 MAINTENANCE 237
- APPENDIX A. GLOSSARY 241
- B.1 SPECIFICATIONS 245
- B.3 INSTRUCTION 15 AND 246
- PARAMETER DESCRIPTIONS 246
- AND SENSOR WIRING 249
- B.5 RS-232 SERIAL DATA 251
- CONFIGURATION AND DATA 251
- BUFFERING 251
- B.6 INPUT DATA FILTERS 252
- B.7 PROGRAM EXAMPLES 254
- CONTROL PORT 5 CONTROL PORT 5 255
- CR23X CR23X 255
- 06: P End Table 1 259
- C.1 TELECOMMUNICATIONS 269
- COMMAND WITH BINARY 269
- RESPONSES 269
- C.2 FINAL STORAGE FORMAT 272
- C.3 GENERATION OF SIGNATURE 273
- COMMANDS TO TRANSFER 274
- PROGRAM WITH COMPUTER 274
- APPENDIX E. ASCII TABLE 277
- F1. FUNCTION 279
- F2. INSTRUCTION DETAILS 279
- TELECOMMUNICATIONS) 283
- G.3 CR23X PROGRAMMING 285
- APPENDIX H 295
- H.4 REMOTE DATALOGGER 297
- PROGRAMMING 297
- 05: P86 Do 298
- AND CR23X MANUALS 301
- AD1 Major Differences 303
- AD3.1 Programming changes 304
- Section 12 307
- TABLE DATA ADDENDUM 308
- OV4. PROGRAMMING THE CR10X 309
- 32 converts the 313
- 03:P84 Data Table Instruction 314
- DATALOGGER 316
- COMPUTER 316
- SECTION 1. FUNCTIONAL MODES 317
- STATUS - ∗B 319
- 1.7 ∗C MODE -- SECURITY 319
- 1.8 ∗D MODE – TRANSFER 319
- PROGRAMS, GENERAL SETTINGS 319
- 1.9 *9 DATA TABLES SIZES 323
- 2.1 FINAL STORAGE AND DATA 325
- 2.2 DATA OUTPUT FORMAT AND 327
- RANGE LIMITS 327
- KEYBOARD/DISPLAY *7 MODE 327
- LOOP TO RUN AM416 MULTIPLEXER 333
- 02: P86 Do 334
- 06: P5 AC Half Bridge 334
- 07: P95 End 334
- TO COUNT SWITCH CLOSURES 335
- (RAIN GAGE) 335
- 8.5 SDM-A04 ANALOG OUTPUT 336
- Section 12. Program Control 345
- Instructions 345
- Security 350
- Remote Location/Coil/Register 350
- Remote Location 351
- Local Location 351
- Send Message (P192) 352
- Message Type 353
- Number of Remotes 354
- First Remote Address 354
- Time into Transmit Interval 354
- Transmit Interval 354
- Swath to Receive 355
- Seconds Until Transmit (P194) 356
- Swath to Receive From Master 358
- Swath to Send 358
- First Location to Send 358
- Force Route (P197) 359
- Set Setting (P198) 359
- Result Location 360
- Beacon Intervals 361
- Neighbor Filter 362
- CR23X INDEX 363
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