See below summary of how molbloc / molbox flow calibration system works, and the requirements for different calibration types on the molbloc elements. More details in the attached files.
q is flow, p is pressure
Below is not unique to molbloc / molbox but is critically important to know if you're measuring mass flow or volume flow.
See the article with Quick Start Guides for laminar molbloc elements here for more information on using molbox/molbloc flow calibration system with laminar molbloc elements.