Campbell CDM-VW300 Series, User Manual

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8.5.1.4.5 High-Frequency Warning Flag .............................. 54
8.5.1.4.6 Interpreting the Diagnostic Code ........................... 54
8.5.2 Standard Deviation of Dynamic Output ...................................... 55
8.6 Factory Default Reset ......................................................................... 55
9. Glossary ................................................................... 56
10. References and Attributions ................................... 56
Appendices
A. 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 Gauge .......................... E-1
E.2 Example Error Calculation: DGSI Embedment Strain Gauge ......... E-2
E.3 Example Error Calculation: DGSI Spot-Welded Strain Gauge ........ E-2
E.4 Example Error Calculation: Geokon 4420 Crack Meter .................. E-2
E.5 Example Error Calculation: DGSI Piezometer 52611099 ................ E-3
F. Thermistor Information .......................................... F-1
F.1 Converting Resistance to Temperature ............................................ F-1
F.1.1 Resistance Conversion Example – Geokon Sensor ................... F-1
F.2 Accuracy and Resolution ................................................................. F-1
G. CRBasic Program Library ..................................... G-1
G.1 Dynamic Measurements .................................................................. G-1
G.1.1 20 Hz Measurement Example — One CDM-VW300, Two Channels
.............................................................................................. G-1
G.1.2 20 Hz Measurement Example — One CDM-VW305, Eight Channels
.............................................................................................. G-2