Could not talk to the probe using RS-232 communications and the DMT PACS software.
There is a bug in the DMT PACS software (version 2.2.0) where by you always have to first set the Baud Rate to 38400 and then try to connect. It will not work if you first don't open up the <Probe Setup><DMT Probe A><Settings> window and select either <Apply> or <OK>.
Always set the Baud Rate when starting the software.