Campbell-scientific CR9000X Measurement and Control System Uživatelský manuál Strana 278
- Strana / 442
- Tabulka s obsahem
- KNIHY
Hodnocené. / 5. Na základě hodnocení zákazníků
Section 7. Measurement Instructions
7-54
Amplitude
The am
plitude and phase option returns the amplitude as described above, plus
the phase in radians given by:
⎟
⎠
⎞
⎜
⎝
⎛
−
r
i
1
tan .
The FFT calculation produces FFTLen/2 +1 pairs of amplitude and phase
components. ILow and IHigh, described below, determine which of these
pairs of values are returned by FFTFilt. The phase is between -
π and π.
Power
The power spectrum
option gives the power for each of the spectral
components. The FFT calculation produces FFTLen/2 +1 power components.
ILow and IHigh, described below, determine the number of values returned by
FFTFilt. The CR9052DC computes the power from:
(
)
2
22
2
N
ir +
for all spectral components except the dc and Nyquist components. The dc
component is computed from
(
)
2
22
N
ir +
,
and the Nyquist component is computed from
(
)
2
22
2N
ir +
.
The sum of all of the ac components of the power spectrum gives the variance
of the original time series. The units of the power spectrum are
()
2
mV .
Power Spectral Density
The power spect
ral density (PSD) function normalizes the power spectrum by
the bandwidth of each spectral component. The FFT calculation produces
FFTLen/2 +1 PSD components. ILow and IHigh, described below, determine
the number of values returned by FFTFilt. The CR9052DC computes the psd
from:
(
)
SR
fN
ir
22
2 +
for all components except the dc and Nyquist components.
f
SR
is the sample
rate of the original time series (FSampRate). The dc component is computed
from:
()
SR
fN
ir
22
+
,
and the Nyquist component is computed from:
(
)
SR
fN
ir
2
22
+
.
The integral of the PSD over all of the ac components gives the variance of the
original time series. The units of the PSD are
(
)
Hz
mV
2
.
RMS Amplitude
The R
MS (root-mean-square) amplitude is computed from the square root of
the power spectrum for all spectral components, or equivalently, the amplitude
spectrum divided by the
2 for all ac components. The dc component of
RMS amplitude spectrum is the same as the dc component of the amplitude
spectrum. The FFT calculation produces FFTLen/2 +1 RMS amplitude
components. Spectral binning and ILow and IHigh, described below,
- CR9000X Measurement and 1
- Control System 1
- Warranty 3
- Assistance 4
- CR9000X Table of Contents 5
- Quick Start 9
- QS1. Setting Up 10
- QS1.4 Powering the Logger 11
- Click on to set up 11
- QS1.6.1 IP Port Setup Tips 18
- QS3. RealTime Monitoring 26
- QS4. Data Collection 27
- QS5. View Data 28
- Processor 29
- Communication Ports 30
- Peripheral Compatibility 30
- PC-Card LED Indicator Status 31
- Instruction Set 31
- Overview 33
- MADE IN USA 34
- CR9032 CPU Module 36
- CR9041 A D 38
- LOGAN, UTAH 38
- OV1.2 Measurement Modules 39
- CR9052DC MADE IN USA 42
- CR9052EC 42
- CR9052IEPE 44
- 9055 50V ANALOG INPUT 45
- CR9058E Isolation Module 46
- CR9060 Excitation Module 47
- CR9071E COUNTER MADE IN USA 50
- CR9071EC 50
- OV2.1 Memory 52
- OV2.3 Data Tables 53
- OV4. Support Software 55
- LoggerNet 56
- Short Cut 57
- View Pro 57
- RTMC Pro 57
- RTMC Web Server 58
- OV5. Specifications 59
- Section 1. Installation 63
- 1.1.3 Junction Boxes 64
- 1.2.3 Solar Panels 68
- 1.2.5 Safety Precautions 69
- 1.3.1 Desiccant 69
- 1.3.2 Nitrogen Purging 69
- 2.1.1 Internal Flash Memory 73
- 2.1.3 PCMCIA PC Card 73
- 2.2 Internal Data Format 74
- 2.2.1 NAN and ±INF 75
- 2.3 Data Collection 77
- 2.3.1.1 Collect Mode 78
- 2.3.1.2 File Mode 78
- 2.3.1.3 File Format 79
- 2.3.5 Converting File Format 81
- 2.4 Data Format on Computer 82
- LINE 5 Field Data Type 84
- LINE 6 Time Stamp 84
- Details 89
- 3.1.1.2 Delay 90
- 3.1.1.3 Integration 91
- ±5 V Input Limits of the 93
- 3.1.3 Signal Settling Time 96
- Settling Time 98
- 3.1.4.1 Error Analysis 99
- Time(hrs) 100
- if a differential 101
- can be minimized by making 105
- entirely true 109
- IntegTime 113
- Sync Order 1 114
- Sync Order 5 114
- CHART 3.2.2-2 115
- Tau= 5.0 Seconds 120
- Tau = 0.5 Seconds 120
- Tau = 5.0 Seconds 121
- VARIOUS WINDOWING FUNCTIONS 122
- PERIOD (P) 125
- ±20 V 127
- Programming 129
- Output Rate 132
- ‘Define Public Variables 132
- 4.2 CRBasic Programming 134
- 4.2.2 Numerical Entries 135
- 4.2.3 Programming Structure 135
- CallTable Temp 137
- 4.2.4 Declarations 139
- 4.2.4.3 Dimensions 140
- 4.2.4.4 Data Types 140
- 4.2.5 Constants 147
- 4.2.6 Flags 147
- 4.2.7 Parameter Types 148
- 4.2.8 Data Tables 148
- 4.2.8.1 DataTable/EndTable 150
- 4.2.9.1 Scan Instruction 153
- 4.2.9.2 SubScan 153
- 4.2.9.3 SlowSequence 156
- 4.2.11 Expressions 162
- 4.2.11.5 String Expressions 166
- Alias VariableA = VariableB 171
- [ Return (expression) ] 177
- [ ExitFunction ] 177
- EndFunction 177
- StationName 181
- SUB, EXIT SUB, END SUB 182
- Subroutine Example 184
- 6.1 Data Table Declaration 185
- 6.2 Trigger Modifiers 186
- DATAINTERVAL PARAMETERS 187
- OpenInterval 188
- DATAEVENT PARAMETERS 191
- FillStop 192
- WORSTCASE PARAMETERS 194
- CardFlush 195
- CardOut (StopRing, Size) 195
- CARDOUT PARAMETERS 196
- DSP4 (FlagVar, Rate) 196
- DSP4 PARAMETERS 196
- FFT PARAMETERS 198
- HISTOGRAM PARAMETERS 203
- UpLim3, LowLim4, UpLim4) 204
- LEVELCROSSING PARAMETERS 205
- · . . . . . . . · 207
- MAXIMUM PARAMETERS 209
- MEDIAN PARAMETERS 210
- MINIMUM PARAMETERS 210
- MOMENT PARAMETERS 211
- UpperLimit, MinAmp, Form) 211
- # of Mean Ranges 212
- CYCLIC STRESS 213
- RAINFLOW PARAMETERS 215
- SampleFieldCal 215
- SAMPLE PARAMETERS 216
- SAMPLEMAXMIN PARAMETERS 217
- STDDEV PARAMETERS 218
- TOTALIZE PARAMETERS 218
- WINDVECTOR PARAMETERS 219
- Measured raw data: 220
- Calculations: 221
- ()(( /)) ( /) 223
- ΘuUS US=− =−21 811 223
- 7.1 Voltage Measurements 225
- 7.4 Self Measurements 225
- 7.5 Peripheral Devices 225
- 7.6 Pulse/Timing/State 226
- 7.7 Serial Sensors 226
- CR9058E*: 228
- VOLTSE PARAMETERS 229
- TCDIFF PARAMETERS 230
- S.E. Chanel 231
- Thermocouple 231
- TCSE PARAMETERS 232
- 7.3.2 Bridge Excitation 233
- 7.3.3 Half Bridges 234
- 7.3.4 Full Bridges 237
- AM25T PARAMETERS 241
- CS7500 PARAMETERS 242
- SDMA04 PARAMETERS 243
- SDMCAN PARAMETERS 244
- SDMCD16AC PARAMETERS 250
- SDMCVO4 PARAMETERS 251
- SDMINT8 INTERVAL TIMER 251
- SDMINT8 PARAMETERS 252
- SDMIO16 PARAMETERS 254
- ValuesPerRep, Mult, Offset) 255
- SDMSIO4 PARAMETERS 255
- Offset) 255
- SDMSW8A PARAMETERS 256
- SDMSpeed (BitPeriod) 256
- SDMSPEED PARAMETER 256
- SDMTrigger 257
- SDMX50 (SDMAddress, Channel) 257
- Mult, Offset) 258
- ± 20 V 260
- PULSECOUNT PARAMETERS 261
- PulseCountReset 261
- PulseCountReset Example 1 262
- PulseCountReset Example 2 263
- ReadIO (Dest, PSlot, Mask) 263
- READIO PARAMETERS 264
- Function 8–1, AllDoneFlag) 264
- TIMERIO PARAMETERS 265
- SERIALINPUT PARAMETERS 267
- SerialInput Example 267
- VOLTFILT PARAMETERS 269
- SUBSCAN PARAMETERS 270
- Filter Module Memory Buffer 272
- FFTFILT PARAMETERS 273
- Constant,Variable 274
- Array, Expression 274
- =×= 11 281
- FFTSample (Source, DataType) 286
- FFTSAMPLE PARAMETERS 286
- Instructions 287
- >> 6 288
- >> 4 288
- ABS(Source) 289
- ACOS (Source) 289
- AND Operator 290
- ASIN (Source) 291
- ATN(Source) 291
- ATN2(Source) 292
- AVGRUN PARAMETERS 295
- AvgSpa (Dest, Swath, Source) 296
- AVGSPA PARAMETERS 296
- Ceiling(Source) 296
- COS(Source) 296
- CosH (Source) 297
- DewPoint (Dest, Temp, RH) 299
- DEWPOINT PARAMETERS 299
- EXP(number) 301
- FFTSPA PARAMETERS 302
- Floor (Source) 304
- FRAC(Source) 305
- Hex (Expression) 305
- HexToDec (Expression) 305
- IFTIME PARAMETERS 307
- IIF PARAMETERS 308
- INT(Source), Fix(Source) 309
- LOG(Source) or LN(Source) 309
- LOG10 (source) 310
- MaxSpa(Dest, Swath, Source) 310
- MAXSPA PARAMETERS 310
- MinSpa(Dest, Swath, Source) 311
- MINSPA PARAMETERS 311
- OR Operator 312
- PEAKVALLEY PARAMETERS 313
- PRT PARAMETERS 315
- PRTCALC PARAMETERS 316
- Randomize(Source) 316
- RectPolar (Dest, Source) 317
- RECTPOLAR PARAMETERS 317
- RMSSpa(Dest, Swath, Source) 317
- RMSSPA PARAMETERS 318
- Round(Source, Decimal) 318
- RND Function 318
- SGN Function 319
- SIN(Source) 320
- SINH (Source) 320
- SortSpa(Dest, Swath, Source) 320
- SORTSPA PARAMETERS 321
- SQR(Source) 321
- STDDEVSPA PARAMETERS 322
- SatVP (Dest, Temp) 322
- STRAINCALC PARAMETERS 323
- 1/4 BRIDGE STRAIN 324
- 1/2 BRIDGE STRAIN 324
- Full Bridge Strain 325
- Tan(Source) 327
- TANH (Source) 327
- VAPORPRESSURE PARAMETERS 328
- Derived Math Functions 329
- CallTable 332
- CallTable Name 332
- Default Program 332
- Syntax 2 Do 334
- Exit Do] 334
- FileManage 335
- FILEMANAGE PARAMETERS 335
- FileMark(TableName) 336
- FILEMARK PARAMETERS 336
- For ... Next Statement 338
- Exit For] 338
- Include 342
- RunDLDFile 343
- SCAN PARAMETERS 345
- SCAN PARAMETERS CON'T 346
- SETSTATUS PARAMETERS 349
- Slot12CardID) 350
- SlowSequence(TimeSlice) 350
- SubScan/NextSubScan 352
- WaitDigTrig 355
- WAITDIGTRIG PARAMETERS 356
- BiasComp 357
- Calibrate 357
- CALFILE PARAMETERS 358
- EXCITE PARAMETERS 360
- Index, Avg) 361
- Mode value 362
- FIELDCAL PARAMETERS 363
- Zeroing 366
- for Function 43 367
- = micro-strain 368
- FIELDCALSTRAIN PARAMETERS 369
- GETRECORD PARAMETERS 372
- InstructionTimes(Dest) 372
- LoadFieldCal 373
- MOVE PARAMETERS 374
- NewFieldCal 374
- NEWFIELDNAMES PARAMETERS 375
- PORTSET PARAMETERS 375
- Power Off 376
- POWEROFF PARAMETERS 376
- Powerup.ini 377
- Command,File,Device 377
- POWERUP.INI FILE PARAMETERS 379
- RealTime(Dest) 379
- Reset Table 380
- ResetTable( TableName ) 380
- SecsSince1990 380
- SECSSINCE1990 PARAMETERS 381
- TIMER PARAMETERS 381
- WriteIO(PSlot, Mask, Source) 382
- WRITEIO PARAMETERS 382
- 9.3 File Control 383
- FILELIST PARAMETERS 384
- Enter FILEMANAGE PARAMETERS 384
- FileOpen 385
- Enter FILEOPEN PARAMETERS 385
- FileRead 386
- FILEREAD PARAMETERS 386
- FileReadLine 386
- FILEREADLINE PARAMETERS 386
- FileRename 387
- FILERENAME PARAMETERS 387
- FileSize 387
- FileTime 387
- FileWrite 388
- FILEWRITE PARAMETERS 388
- TableFile 388
- Enter TABLEFILE PARAMETERS 389
- DisplayMenu/EndMenu 393
- Variable 394
- SubMenu/EndSubMenu 395
- 11.1.1 Constant Strings 397
- 11.1.2 Add Strings 397
- Processing Instructions 398
- FORMATFLOAT PARAMETERS 400
- INSTR PARAMETERS 401
- LEFT PARAMETERS 401
- Len (SourceString) 401
- LowerCase (SourceString) 402
- LTrim (SourceString) 402
- Mid (String, Start, Length) 402
- MID PARAMETERS 402
- REPLACE PARAMETERS 403
- RIGHT PARAMETERS 403
- RTrim (SourceString) 403
- SPLITSTR PARAMETERS 404
- StrComp (String1, String2) 405
- Trim (SourceString) 405
- UpperCase (SourceString) 405
- Constants 407
- calibration 409
- Scan Rates 411
- Appendix D. Status Table 417
- Appendix E. Glossary 421
- E.2 Concepts 431
- CR9000X Index 433
- Definition, 4-15 436
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