How do I define one constant Hydrotest pressure over the whole model?
The hydrotest pressure defined under Load/hydrotest dialog is taken as the pressure (usually case 1) multiplied by the factor e.g. 1.5 at each point hence for case 1 if different pressures in the system e.g branch line then the hydrotest pressure will be different for the branch. A workaround if on hydrotest pressure for all points then define a dummy temperature and pressure case 2 which has one constant pressure for the whole model and no temperature loading i.e ambient and define the hydrotest pressure based on case 2.