Measurement-computing WaveBook rev.3.0 Manual de usuario Pagina 184
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C-10 daqX API - Programming Models,
6-22-99
WaveBook User’s Manual
Multiple Hardware Scans, Software Triggering
This model takes multiple scans from several channels. The functions used
here are of a lower level than the one-step functions, and more control is
allowed over the acquisition. This program exemplifies this flexibility by
individually configuring the channels and by explicitly setting up the transfer
buffer.
First, the acquisition is configured by setting up the channel scan group
configuration, the acquisition frequency, the acquisition trigger and the
acquisition mode. Once configured, the transfer is set up and the acquisition
is then armed by calling the daqAdcArm function.
At this point, the WaveBook/Daq* device trigger is armed, and A/D
acquisition will begin immediately upon trigger detection.
This example will retrieve 10 scans for channels 0, 5, and 8, triggered via
software with a 3000 Hz sampling frequency and unity gain. Functions used
include:
•
VBdaqAdcSetScan&(handle&, startChan&, endChan&, gain&,
flags&)
•
VBdaqAdcSetFreq&(handle&,freq!)
•
VBdaqAdcSetTrig&(handle&, triggerSource&, rising&,
level%, hysteresis%,channel&)
•
VBdaqAdcSetAcq&(handle&,mode&,preTrigCount&,postTrigCo
unt&)
•
VBdaqAdcTransferSetBuffer&(handle&,buf%(), scanCount&,
transferMask&)
•
VBdaqAdcTransferStart&(handle&)
•
VBdaqAdcTransferGetStat&(handle&,status&,retCount&)
•
VBdaqAdcWaitForEvent&(handle&,daqEvent&)
daqAdcSetScan
daqAdcSetFreq
daqAdcSetAcq
daqAdcTransferStart
daqAdcSetTrig
daqAdcSoftTrig
daqAdcTransferSetBuffer
daqWaitForEvent
daqAdcArm
daqAdcTransferGetStat
This program will initialize the hardware, then take readings from the analog input channels in the base unit
(not the expansion cards). The following lines demonstrate channel scan group configuration using the
daqAdcSetScan command. Note that the flags may be channel-specific.
Const freq! = 3000
Const scans& = 10
Const channels& = 3
Dim buf%(scans& * channels&)
Dim chans&(channels&), gains&(channels&), flags&(channels&)
Now set up the desired channels and their individual gains and flags.
chans&(0) = 0 ' high speed digital channel
chans&(1) = 5 ' analog channel 5
chans&(2) = 8 ' analog channel 8
' Channel gains and flags setting
For i& = 0 To channels& - 1
gains&(i&) = DgainX1& ' unity gain
flags&(i&) = DafAnalog& + DafSingleEnded& + DafUnipolar&
Next i&
Open the device, and set up the error handler. For simplicity, the error handler is not defined explicitly.
Refer to Example 1 for more information.
handle& = VBdaqOpen("WaveBook0")
ret& = VBdaqSetErrorHandler(handle&, 100)
On Error GoTo ErrorHandlerADC3
Now set the scan configuration:
ret& = VBdaqAdcSetScan&(handle&,chans&(), gains&(), flagss&(), channels&)
Next, set the internal sample rate to 3 kHz.
ret& = VBdaqAdcSetFreq&(handle&,3000!)
The acquisition mode needs to be configured to be a fixed-length acquisition with no pre-trigger scan data
and 10 scans of post-trigger scan data. The mode is set to DaamNShot&, which will configure the
acquisition as having finite length and, as such, will be terminated when the post-trigger count has been
satisfied. Once finished, the acquisition is automatically disarmed.
ret& = VBdaqAdcSetAcq&(handle&,DaamNShot&, 0, scans&)
- WaveBook 1
- How To Use This Manual 5
- Table of Contents 6
- 6 - PostView 7
- 7 - Calibration 7
- 8 - Theory of Operation 7
- 9 – Troubleshooting 7
- Appendices 7
- Desktop PC with WBK21 ISA/EPP 9
- DB25M Connector “ 9
- (links to LPT/EPP on host PC) 9
- 2. Connect Signals 10
- 3. Connect Power 11
- 4. Install Software 11
- 5. Test your System 12
- QS-6 Quick Start 14
- WaveBook Overview 1 15
- WaveBook Features 16
- WaveBook Overview 1-3 17
- 1-4 WaveBook Overview 18
- WaveBook Overview 1-5 19
- Software Overview 20
- WaveView Configuration Window 21
- Programming Environments 22
- Hardware Setup Notes 23
- 2-2 WaveBook Setup 24
- WaveBook Setup 2-3 25
- Optional Printer Connection 26
- System Testing 28
- WaveBook Setup 2-7 29
- 2-8 WaveBook Setup 30
- WaveBook Setup 2-9 31
- 2-10 WaveBook Setup 32
- Dust Cap 33
- Shielded 33
- BNC Connector 33
- WBK10/10H - Expansion Modules 34
- Hardware SetupConfiguration 35
- CAUTIONCAUTION 35
- DBK34 Vehicle UPS Module 36
- Software Setup 37
- WBK11 Block Dia 38
- Description 40
- Hardware Setup 40
- Accelerometer Tutorial 45
- WBK15 Board Layout 50
- 5B Module Insertion/Removal 50
- WARNINGWARNING 51
- WBK16 - Strain-Gage Module 54
- WBK16 Fan 56
- Kelvin-Type Excitation Leads 57
- Soldering Resistors to 58
- Adapter Plug 58
- B,D, or F Shunt 61
- WBK16 Si 64
- Power 65
- Channel Values Tab 72
- Column Display Description 72
- WBK30 Block Diagram 77
- WBK30 – Specifications 80
- WBK61/62 Block Diagram 81
- System Power & Assembly 4 85
- DIN5 Power Pinout 87
- 14 VDC Mode (default) 88
- 28 VDC Mode 89
- Charging DBK30A’s Batteries 90
- DBK34 - Vehicle UPS Module 91
- +24V/+12V 92
- Stacking Modules 94
- WaveView 5 95
- Startup WaveView 96
- Configure Channels 97
- Configure Acquisition 98
- Collect Data 99
- Store Data ( 100
- Menu Items & Buttons 100
- Performance 102
- Data Files 102
- Memory Module 102
- Input Channel Configuration 103
- WaveBook User’s Manual 104
- 5-10 WaveView 104
- Acquisition Configuration 105
- Multiple Ch Analog 106
- Digital Pattern 106
- WaveView 5-13 107
- Pulse Trigger Selected 108
- WaveView Scope Window 109
- Scope Display 111
- Data Destination Area 113
- 5-20 WaveView 114
- PostView 6 115
- Hours: mins: seconds. Tenths 116
- Time stamp can be relative or 116
- Starting PostView 117
- PostView Toolbar Items 118
- Channel Information Region 119
- Menu Items 120
- Chart Setup Wizard 122
- Automatic Display Creation 123
- Display Configuration 124
- Adding Channel 2 to Chart 1 125
- Manually Creating a Display 126
- Adding a Chart to Group 1 127
- PostView Timebase 129
- Calibration 7 131
- 7-2 Calibration 132
- Performing System Calibration 133
- Manual Calibration 134
- Theory of Operation 8 135
- Acquisition Steps 136
- Theory of Operation 8-3 137
- Start the Acquisition 138
- Stop the Acquisition 138
- Shut Down WaveBook 138
- Signal Processing 139
- 8-6 Theory of Operation 140
- WaveBook/516 141
- Acquisition Operation 142
- Scan Composition 143
- Scan Period 143
- Trigger Operation 144
- Multi-Channel Trigger 146
- Theory of Operation 8-13 147
- Pre/Post-Trigger Acquisition 149
- Data Processing 150
- Data Transfer 151
- Theory of Operation 8-19 153
- Theory of Operation 8-21 155
- Troubleshooting 9 157
- Overview 158
- Driver Support 158
- Connection Problems 158
- 32-Bit WaveView Issues 159
- Windows NT V3.51 159
- Windows 95/98 Problems 159
- 9-4 Troubleshooting 160
- Troubleshooting 9-5 161
- 9-6 Troubleshooting 162
- Accessories 163
- : ±1 LSB max 164
- Wavebook/516 Specifications 165
- PGA Filter 166
- Triggering 166
- External Clock 166
- Sequencer 166
- General Specifications 167
- Optional Accessories 167
- DBK30A - Specifications 168
- DBK34 - Specifications 168
- WBK10/10H - Specifications 168
- WBK11 - Specifications 168
- WBK12/13 - Specifications 169
- WBK14 - Specifications 169
- WBK15 - Specifications 170
- WBK16 - Specifications 170
- WBK20/20A - Specifications 170
- WBK21 - Specifications 170
- WBK30 - Specifications 171
- WBK61/62 - Specifications 171
- Abbreviations 172
- Appendix B B 173
- Introduction 175
- Data Acquisition Environment 175
- Basic Models 176
- Background Acquisition 186
- Complex Triggering 187
- Data Packing & Rotating 189
- Direct-to-Disk Transfers 191
- Finally, close the device: 195
- 6-22-99 196
- Commands 199
- DaqAdcSetDataFormat 206
- API Reference Tables 227
- ADC Miscellaneous Definitions 229
- WBK Card Definitions 230
- Response DAC on WaveBook 231
- WaveBook User's Manual 235
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