Campbell TDR200, Инструкция по эксплуатации

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TDR200-Based Time-Domain Reflectometry System
7
13. Select Open in CRBasic to open the generated code in the CRBasic
Editor
and make any desired changes. Press Finish to exit the program
generator wizard.
5. Overview
The TDR200 generates a short rise time electromagnetic pulse that is applied to
a coaxial system and samples and digitizes the resulting reflection waveform
for analysis or storage. It has a single BNC connector for communication with
an attached coaxial cable.
To measure multiple sensors, the TDR200 requires one or more SDM8X50
coaxial multiplexers. The SDM8X50 is a 50 ohm, coaxial, eight-to-one
multiplexer. It consists of a surge-protected multiplexer circuit board enclosed
in a metal housing and a separate strain-relief bracket for the coaxial cables.
Both the multiplexer housing and the strain relief bracket have holes drilled at
a 1-inch spacing. This allows the SDM8X50 to be mounted to a wall or
attached to the backplate of a user-supplied enclosure or Campbell Scientific
enclosure. When purchased with the –E option, the SDM8X50 includes a 10-
inch-by-12-inch-by-4.5-inch environmental enclosure and an enclosure supply
kit. Other compatible Campbell Scientific enclosures that may be purchased
separately include the ENCTDR100, ENC12/14, ENC14/16, and ENC16/18.
The TDR200 is also compatible with the SDMX50-series coaxial
multiplexers. Refer to Appendix A ,
SDMX50-Series Multiplexers
(p. A-1)
, for information about using the TDR200 with these coaxial
multiplexers.
The TDR200 is controlled by a computer using PC-TDR 3.0 or higher software
or by a datalogger. Compatible dataloggers include the CR6 series, CR800
series, CR1000, and CR3000, which use the TDR200() CRBasic instruction.
NOTE