I have never seen it presented as you have here.
The latter would be as follows,
During tests, the instrumentation system should measure the following parameters:
- air pressure upstream of the seal
- mockup inlet air pressure upstream of the orifice
- mockup air pressure downstream of the lower seal
- mockup lower seal outlet air pressure upstream of the orifice etc.
I have seen both lower case and upper case letters used in bullet points. Never use end punctuation in this case.