Printing system with a printing fluid collector

A method of operating a printing system, the method comprising:

• transporting a print medium along a media path of the printing system;
• obtaining a pressure measurement from a vacuum system located on the media path during the transporting;
• comparing the pressure measurement to at least one predefined pressure range to determine a porosity of the print medium;
• and
• based on the porosity of the print medium, generating a first signal, via the printing system, to indicate a state of a printing fluid collector to collect printing fluid that permeates the print medium.

A non-transitory computer-readable storage medium comprising a set of computer-readable instructions stored thereon, which, when executed by a processor of a printing system, cause the processor to:

• transport a print medium along a media path of the printing system;
• obtain a signal indicative of whether a printing fluid collector is installed in relation to the media path of the printing system;
• obtain a pressure measurement from a vacuum system of the printing system, the vacuum system being located on the media path of the printing system, the pressure measurement being obtained while the print medium is being transported along the media path;
• determine information indicative of whether a printing fluid in the printing system is able to penetrate the print medium based on the pressure measurement;
• and
• responsive to the information indicating that the printing fluid in the printing system is able to penetrate the printing substrate and to a value of the signal indicating that the printing fluid collector is not installed in relation to the media path, interrupt a printing operation upon the print medium.