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DataShuttle and DynaRes
11-13-01
DynaRes - Technical Notes 5-5
Troubleshooting: Operation
Hints
During operation, it’s good practice to short all analog input channels you’re not using; to do this,
connect + to – to Com.
It’s essential to have exactly one ground reference per channel. This single connection to ground makes sure
you don’t exceed the common mode range of input.
(More than one connection per channel can lead to ground loops, causing errors or erratic readings.
Connecting the – to the Com terminal provides a single ground. Your sensor might also provide another
ground. If you’re not sure that your sensor is grounded, try connecting the – to Com, and not, and see which
works best.)
Remember that if speed is not critical, selecting the “low noise mode” in software always provides the best
accuracy and resolution with your data acquisition board.
Operating Qs And As
1.
Problem: My board reads analog inputs wrong.
Action: Make sure the calibration numbers in the EEPROM are correct (see the discussion beginning
on page 5 – 6 in this chapter). If the figures are correct, try shorting + to – to Com: the board should
return a reading around 0V.
2.
Problem: My board reads the thermocouple as a very negative temperature.
Action: Verify the connections are secure. Opens read as negative temperature.
3.
Problem: My board reads thermocouple input wrong.
Action: Confirm that the CCAL number in the EEPROM matches the number on the terminal panel’s
calibration label.
(If you need to use a general-purpose terminal panel – one that doesn’t have a factory CCAL number
– with a thermocouple, you can achieve approximate results by entering a CCAL of 22000. Then
change the figure by about 75 points for each degree C. that you want to raise the temperature.)
4.
Problem: My readings are noisy.
Action: Try using the low noise mode (see your software manual for more information).
5.
Problem: My board used to work, but now the software cannot find it, or reports an error.
Action: Check to make sure the Board Number switch is not set to “0.”
If You Need Customer Support
What to do before calling technical support, to help us serve you better:
1.
Have the part numbers of your boards and terminal panels ready.
2.
Have the type and version number of the software you’re using.
3.
Have your computer’s type, model, and the version of the operating system.
- DataShuttle and DynaRes 1
- Table of Contents 5
- 4 - Installing the DynaRes 6
- 5 - DynaRes - Technical Notes 6
- 8 - Installing the ACAO 7
- Technical Notes 7
- 10 - QuickLog Introduction 7
- Introduction 9
- Data Presentation 10
- Dynamic Resolution 10
- Features and Configurations 11
- DataShuttle Model Variations 12
- DataShuttle-RTD 13
- DataShuttle-TC 14
- DataShuttle-5B 14
- Installing Your DataShuttle 15
- Physical Installation 16
- Printer Installation 17
- Keyboard Adapter Installation 17
- Next Steps 17
- Block Diagram 19
- Auxiliary Components 21
- Power Supplies 22
- Examples 23
- Example 3: Ground loops 24
- &$87,21 25
- Digital Components 26
- Installing Pull-up Resistors 26
- Counter/Timer 27
- If You Need Customer Support 28
- Troubleshooting: Operation 29
- Product Specifications 31
- DataShuttle-16 RTD Accuracy 32
- Analog Input 34
- Digital Input/Output 34
- Analog Output 34
- General Information 35
- Introduction to the DynaRes 3 37
- DynaRes System Requirements 40
- Installing the DynaRes 4 41
- Physical Board Installation 42
- Measuring Current 44
- Setting the Base Address 45
- Changing Hardware Interrupts 46
- DynaRes - Technical Notes 5 47
- Recalibration 49
- EDITCAL Utility 49
- DynaRes 8/16 RTD Accuracy 53
- Stability 54
- Input Impedance 54
- Noise Rejection 54
- Common Mode Range 54
- Input Protection 54
- Resolution/Scan Rate 55
- Digital I/O Channels 55
- General Conditions 55
- Types of Terminal Panels 58
- T71 Terminal Panel 59
- Reference Tables 60
- Digital Auxiliary Components 64
- Troubleshooting Q & A 65
- Installing the ACAO 8 71
- Setting the Switches 73
- Multiple Boards 74
- Single Board 75
- Disabling Board 75
- Setting the Switch 75
- Base Address Settings 77
- 8-8 Installing the ACAO 78
- Overview 79
- Editing Calibration Files 81
- Calibration File Format 82
- Using EDITCAL 83
- EDITCAL Selections 84
- 0 to 10V 0.02% 0.01% 86
- Auxiliary Power Output 87
- QuickLog Introduction 10 89
- Setting Up QuickLog 90
- Specifications 91
- I/O Configuration By Channel 92
- Chart Configuration 92
- File Menu 93
- Edit Menu 93
- Options Menu: General 94
- Options Menu: Inputs 95
- Options Menu: Output Meters 95
- Options Menu: Chart 95
- Chart Menu 96
- Run Menu 96
- Window Menu 96
- Calibration Menu 96
- Help Menu 96
- Applications Primer 12 97
- Sensor Connections 98
- Digital Connections 98
- Applications Primer 12-3 99
- 12-4 Applications Primer 100
- Analog Input & Output 13 101
- Thermocouple Types 103
- Strain Gages 104
- Piezoelectric Sensors 105
- RTD Ranges & Resolution 108
- RTD Accuracy 109
- High Voltage Divider 111
- Voltage Output 111
- Current Output 112
- Digital I/O 14 115
- 14-2 Digital I/O 116
- Digital I/O 14-3 117
- Pulse Counting 118
- Cascaded Counter/Timers 118
- Frequency/Rate Measurement 119
- 14-6 Digital I/O 120
- Appendix A 121
- Glossary 123
- Glossary - 2 124
- Glossary - 3 125
- Glossary - 4 126
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