The 6270A pressure controller can be setup as an Autodetect device in COMPASS for Pressure v5 and higher. This is the preferred method to use a 6270A in COMPASS for Pressure. Here's a screen-shot of that (with the Autodetect button checked). Then just check the settings on the Communications tab.
Note that the highest ranged module should be in slot 1 of the 6270A controller if the version of COMPASS for Pressure is less than 5.0.50 (due to a bug in COMPASS for Pressure that is fixed in COMPASS version 5.0.50). Download the latest COMPASS update here, COMPASS for Pressure Calibration Software Download/Upgrade
Here's a screen-shot from the Support Device Editor for a 6270A that is setup as an Autodetect device.
If you are using IEEE/GPIB communications ensure that the Communications tab is setup like this,
And for IEEE/GPIB communications check that the settings at [Tools], <Options>, <Interface> are set like this,
Here's a typical setup for RS232/USB Communications,
However, the 6270A is quite easy to setup as a non-Autodetect device. Instructions in the pdf file at the end of this page are screen-shots from the setup in COMPASS for Pressure. See the below pdf file for detailed instructions.
Notes: Revised October 12, 2015 to remove Ready command from 6270A and use COMPASS to determine ready. Also added Test setup information.
Revised April 27, 2018 to add the Ready command back in
Revised December 3, 2018 with sample IEEE/GPIB and RS232/USB communications screen settings, and COMPASS for Pressure v5.0.50 update information.
Contact Fluke Calibration Pressure Technical Support at the below link or call +1.877.355.3225 with any questions.