Abstract from Blog...
Pascal’s principal says that in a closed container a change in pressure at one location will be experienced equally in any other part of the pressure circuit. This principal allows pressure metrologists to simply connect a device under test (DUT) to a reference, change the pressure to a value they want to test, then compare the reference and device under test. But I probably should not have used to the adjective “simply”. There is a lot to consider when deciding how to connect the DUT to the reference. Here is what I like to think about when getting ready to design a pressure circuit...
Please find details at the following URL.
http://us.flukecal.com/blog/selecting-connecting-tubing-and-hardware-pressure-calibration