I spent this afternoon failing to get the EC150/100 going. The cabling is okay, the instrument is configured properly, the interface panel jumper is set properly, and I'm sure that I am using the correct port configuration command. Nevertheless, I can't get it going on either A8's DSM or the spare we have in the Base. The only things I haven't done are try another port on the Base system and check I/F panel jumpers on A8. Guess I'll try these tomorrow.
P.S. Campbell's nomenclature is odd. EC100 is the electronics box that handles the signals from an IRGASON or separate EC150 CO2/H2O analyzer plus a CSAT3A head. I'm going to keep calling the sensor as a whole an EC150.