CR200/CR200X Series Dataloggers - Campbell Scientific

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Section 7. Grounding 7.1.1 Lightning Protection The most common and destructive ESDs are primary and secondary lightning strikes. Primary lightning strikes hit instrumentation directly. Secondary strikes induce voltage in power lines or wires connected to instrumentation. While elaborate, expensive and nearly infallible lightning protection systems are available, Campbell Scientific has for many years employed a simple and inexpensive design that protects most systems in most circumstances. It is, however, not infallible. Note Lightning strikes may damage or destroy the CR200(X) and associated sensors and power supplies. In addition to protections discussed in ESD Protection (p. 55), use of a simple lightning rod and low-resistance path to earth ground is adequate protection in many installations. A lightning rod serves two purposes. Primarily, it serves as a preferred strike point. Secondarily, it dissipates charge, reducing the chance of a lightning strike. FIGURE. Lightning Protection Scheme (p. 57) shows a simple lightning protection scheme utilizing a lightning rod, metal mast, heavy gage ground wire, and ground rod to direct damaging current away from the CR200(X). 56
Section 7. Grounding Figure 36: Lightning Protection Scheme 7.2 Single-Ended Measurement Reference Low-level single-ended voltage measurements are sensitive to ground potential fluctuations. Although the CR200(X) is not sensitive enough for low-level measurements and ground potential fluctuations are not usually a problem, the grounding scheme in the CR200(X) has been designed to eliminate ground potential fluctuations due to changing return currents from SW Battery, excitation channels, and the control ports. This is accomplished by utilizing separate signal and shield grounds ( ) and power grounds (G). To take advantage of this design, observe the following grounding rule: Note Always connect a device's ground next to the active terminal associated with that ground. Several ground wires can be connected to the same ground terminal. 57
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OPERATOR’S MANUAL CR200/CR200X Se
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Assistance Products may not be retu
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Table of Contents 4.4 Pulse Count M
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Table of Contents 11.4.3 SDI-12 Pow
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Table of Contents Index ...........
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Table of Contents CRBASIC EXAMPLE 1
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Section 1. Introduction Table 1. CR
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Section 2. Quickstart Tutorial 2.1.
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Page 20 and 21: Section 2. Quickstart Tutorial Figu
Page 24 and 25: Section 2. Quickstart Tutorial Exam
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Page 30 and 31: Section 2. Quickstart Tutorial 2.2.
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Page 36 and 37: Section 3. Overview Figure 25: Feat
Page 38 and 39: Section 3. Overview Period Average:
Page 40 and 41: Section 3. Overview 3.1.3.4 Power T
Page 42 and 43: Section 3. Overview 3.1.5.1 Firmwar
Page 44 and 45: Section 3. Overview Advantages of P
Page 46 and 47: Section 3. Overview Table 3. Intern
Page 48 and 49: Section 3. Overview 36
Page 50 and 51: Section 4. Sensor Support 4.1.3 Swi
Page 52 and 53: Section 4. Sensor Support Figure 27
Page 54 and 55: Section 4. Sensor Support 4.3.1 Mea
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Page 58 and 59: Section 4. Sensor Support 4.6 SDI-1
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Page 62 and 63: Section 5. Measurement and Control
Page 64 and 65: Section 5. Measurement and Control
Page 66 and 67: Section 6. CR200(X) Power Supply Au
Page 70 and 71: Section 7. Grounding Examples: •
Page 72 and 73: Section 8. CR200(X) Configuration F
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Page 78 and 79: Section 8. CR200(X) Configuration
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Page 82 and 83: Section 9. Programming in the Logge
Page 84 and 85: Section 9. Programming 9.5 Structur
Page 86 and 87: Section 9. Programming Variable nam
Page 88 and 89: Section 9. Programming CRBASIC EXAM
Page 90 and 91: Section 9. Programming DataTable ()
Page 94 and 95: Section 9. Programming Consider the
Page 96 and 97: Section 9. Programming Scan () dete
Page 98 and 99: Section 9. Programming 9.9.4 Expres
Page 102 and 103: Section 9. Programming 9.11 Program
Page 104 and 105: Section 9. Programming 92
Page 106 and 107: Section 10. CRBASIC Programming Ins
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Section 10. CRBASIC Programming Ins
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Section 10. CRBASIC Programming Ins
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Section 11. Programming Resource Li
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Section 12. Memory and Data Storage
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Section 13. Telecommunications and
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Section 14. PakBus Overview • Rou
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Section 14. PakBus Overview 14.4.6
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Section 14. PakBus Overview 14.5.3
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Section 15. Alternate Telecoms Reso
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Section 15. Alternate Telecoms Reso
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Section 16. Support Software 16.4 P
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Section 16. Support Software 146
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Section 17. Care and Maintenance Fi
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Section 17. Care and Maintenance 15
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Section 18. Troubleshooting 18.1.1.
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Section 18. Troubleshooting Table 2
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Section 18. Troubleshooting 18.3.3
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Section 18. Troubleshooting 18.3.3.
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Section 18. Troubleshooting 160
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Appendix A. Glossary baud rate sett
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Appendix A. Glossary Earth Ground u
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Appendix A. Glossary modem/terminal
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Appendix A. Glossary period average
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Appendix A. Glossary the table is e
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Appendix A. Glossary VAC Volts Alte
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Appendix A. Glossary 14
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Appendix B. Status Table and Settin
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Appendix C. Serial Port Pin Outs 22
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Appendix D. ASCII / ANSI Table Dec
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Appendix D. ASCII / ANSI Table Dec
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Appendix F. Sensors and Peripherals
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Index Debugging • 151 Declaration
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Index O Offset • 86 Ohm • 6 Ohm
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Index U UPS • 11 User Program •
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CR200/CR200X Series Dataloggers - Campbell Scientific

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