Campbell CDM-VW300 Series Manuál stáhnout pdf (Strana 7)

Table of Contents

8.5.1 Diagnostic Codes (Dynamic) ......................................................54

8.5.1.1 Description of Diagnostic Parameters ..............................55

8.5.1.2 Calculating Low- and High-Frequency Boundaries .........56

8.5.1.3 Using Diagnostic Parameters ...........................................57

8.5.1.4 Decoding the Diagnostic Code.........................................57

8.5.1.4.1 Excitation Strength ................................................57

8.5.1.4.2 Low-Amplitude Warning Flag ..............................57

8.5.1.4.3 High-Amplitude Warning Flag..............................58

8.5.1.4.4 Low-Frequency Warning Flag...............................58

8.5.1.4.5 High-Frequency Warning Flag..............................58

8.5.1.4.6 Interpreting the Diagnostic Code...........................58

8.5.2 Standard Deviation of Dynamic Output......................................59

8.6 Factory Default Reset.........................................................................59

9. Glossary ....................................................................60

10. References and Attributions....................................60

Appendices

Measurement Theory.............................................. A-1

A.1 Dynamic Vibrating-Wire Measurements ........................................ A-1

A.1.1 Dynamic and Static Frequencies.............................................. A-2

B. SC-CPI Datalogger to CPI Interface....................... B-1

B.1 Introduction......................................................................................B-1

B.2 Quickstart.........................................................................................B-1

B.3 Overview..........................................................................................B-1

B.4 Specifications ...................................................................................B-3

C. CDM Devices and CPI Bus ..................................... C-1

C.1 CDM Interconnection and Datalogger Connection..........................C-1

C.1.1 Power ........................................................................................C-1

C.1.2 Interconnect Cable ....................................................................C-1

C.1.3 Speed as a Function of Distance ...............................................C-2

C.1.4 CPI Grounding ..........................................................................C-3

C.1.6 Addressing ................................................................................C-3

C.2 Distributed Architecture...................................................................C-3

D. Digits Conversion ................................................... D-1

D.1 Example: Frequency to Digits to Displacement.............................. D-1

E. Calculating Measurement Error............................. E-1

E.1 Example Error Calculation: Geokon Strain Gage ............................E-1

E.2 Example Error Calculation: DGSI Embedment Strain Gage ...........E-2

E.3 Example Error Calculation: DGSI Spot-Welded Strain Gage.......... E-2

E.4 Example Error Calculation: Geokon 4420 Crack Meter ..................E-2

E.5 Example Error Calculation: DGSI Piezometer 52611099................E-3

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Campbell CDM-VW300 Series Manuál Strana 7