Campbell Scientific CDM-VW300 Series Dynamic Vibrating-Wire Analyzer System User Manual

Page 35

CDM-VW300 Series Dynamic Vibrating-Wire Analyzers

The following figure points out essential elements of the CRBasic program
for a datalogger controlling a CDM-VW300.

To simply confirm that readings can be obtained, one of the following
example programs can be used. These programs measure only basic
frequency:

• Appendix G.1.1, 20 Hz Measurement Example – One CDM-

VW300, Two Channels

• Appendix G.1.2, 20 Hz Measurement Example – One CDM-

VW305, Eight Channels

10. Send the CRBasic program to the datalogger using the program Send

command in the datalogger support software (RTDAQ, LoggerNet, or
PC400).

11. Monitor the operation of the system.

Reference Section 7.12.2, Monitoring System Performance.

Using the datalogger support software, monitor the datalogger Public table
as indicated in the following figure. In the Public

table, frequency data

can be displayed that correspond to the channels selected for measurement.
The following figure shows Public table variables Freq(1), Diag(1),
StaticFreq(1), Therm(1), DynStdDev(1) as active with frequency data
from one sensor. The sensor is connected to channel 1 of the CDM-
VW305.