How much pressure can be applied to high pressure port on an MCAL?

The pressure that can be applied will depend on the MCPM reference you have installed and enabled. Before you start, select a test recipe from the pull down menu that will be the range you want to calibrate. The MCAL should select the installed reference that covers the range you want to calibrate, or will tell you there is not an appropriate reference installed. You can tell which reference is selected as it will be shown in white on the main screen (the other reference, if there is one, will be grayed out). Assuming the reference you want to check is shown in white, you then can put the MCAL into monitor mode which will open the valves to that reference, and you can feed the pressure in from your source.