Die PCTDR Software wird mit dem TDR100-System zum Einstellen und zur Fehlersuche verwendet. Es zeigt den volumetrischen Wassergehalt und die elektrische Leitfähigkeit, stellt den Multiplexer-Kanal ein, nimmt Wellenformen und Ableitungen auf und bestimmt die Sensorkonstanten, die zur Messung der Leitfähigkeit gebraucht werden.
Number of FAQs related to PC-TDR: 10
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Yes. In PC-TDR, click Settings/Multiplexer and Add Mux.
No. A Windows-based computer is required to run PC-TDR.
To understand the readings obtained from a datalogger program, it is necessary to see how the TDR100 operates in PC-TDR. Either the TDR100 commands are entered in PC-TDR and the user waits to see the results, or the datalogger sends the TDR100 commands and automatically stores the results.
Campbell Scientific suggests initially entering the TDR100 commands in PC-TDR and waiting for the results before writing a datalogger program. This allows verification that the TDR100 is operating correctly in PC-TDR. After that has been verified, a datalogger program can be created for the TDR100 that sends the commands and stores the results.
Although slope stability/rock mass deformation users will need to adjust the following PC-TDR default settings, these settings may provide a good starting point:
Note that the Probe Length and Probe Offset will not be used for a slope stability/rock mass deformation application.
Yes. PC-TDR can send control commands to advance through the channels of a SDMX50-series multiplexer. To do this, select Settings | Multiplexer and then add the multiplexers and probes that match the TDR100 system.
No, as of September 2014. The PC-TDR support software can be downloaded free-of-charge from the Downloads section of the PC-TDR product page.
There are several possible things that should be considered or verified:
The PC-TDR software is compatible with the SDM8X50 multiplexer, but the non-latching relays may cause issues. When PC-TDR (version 2.08 and lower) advances to a multiplexer terminal, it sends one command to the multiplexer. With the older SDMX50-series multiplexers, one command was sufficient because the relays latched. The non-latching relays on the SDM8X50 release 30 seconds after the command is sent, which results in a loss of connection between the sensor on that terminal and the TDR100. To latch again for a good reading, it is necessary to manually force PC-TDR to go to a different SDM8X50 terminal and then back to the terminal of interest. The continuous waveform function should not be used with the SDM8X50. These known issues will be addressed in the next version of the PC-TDR software.
The TDR100 should work with most good quality USB-to-serial converters, such as the 17394 USB-to-9-pin Male RS-232 cable. To use such an interface, determine which virtual serial terminal it represents, and use that serial terminal in PC-TDR. Early versions of PC-TDR were limited to COM1─COM4. Later versions work with a wider range of COM terminal numbers.
This error occurs if the COM port that was last used by PC-TDR cannot be opened because it is already opened or no longer available. The error is most often seen when either of these two scenarios occurs:
To resolve the error, open the TDR100.ini file found in C:\Campbellsci\pctdr and change the CommPtEx setting to a valid COM port number (for example, CommPtEx=1). Alternately, the TDR100.ini file can be deleted, although this will reset any previously entered wave-form values, as well as any user-defined coefficients.