Current Version: 3.0
PC-TDR software is used with our TDR200 and retired TDR100-based systems during system configuration, testing, probe calibration, and troubleshooting. It displays and collects TDR waveforms, displays volumetric water content and electrical conductivity measurements, and generates CRBasic programs to facilitate TDR data collection on current Campbell Scientific dataloggers.
Number of FAQs related to PC-TDR: 10
Expand AllCollapse All
No. A Windows-based computer is required to run PC-TDR.
Yes. In PC-TDR, click Settings/Multiplexer and Add Mux.
To understand the readings obtained from a data logger 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 data logger 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 data logger program. This allows verification that the TDR100 is operating correctly in PC-TDR. After that has been verified, a data logger program can be created for the TDR100 that sends the commands and stores the results.
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.
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.
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.
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.
There are several possible things that should be considered or verified:
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.