Multi-fluid precision calibration pressure source

A portable calibration pressure device for calibrating pressurized systems, said calibration pressure device comprising:

• a pump having an inlet and an outlet;
• a manifold fluidly connected to the pump;
• a reservoir fluidly connected to the pump;
• and
• a pressure relief valve comprising:
• a pressure relief valve housing comprising a first port in fluid communication with the manifold, a second port in fluid communication with the reservoir, and a channel connecting the first port and the second port;
• a plunger positioned within the housing;
• a sealing tip attached to a first end of the plunger, the sealing tip comprising a central lumen;
• a spring element positioned proximate a second end of the plunger, the spring element configured to bias the plunger toward a first position in which the plunger pushes a sealing surface of the sealing tip against an opening to the channel, blocking fluid communication between the first port and the second port;
• a bleed valve needle extending through the plunger, the bleed valve needle having a distal tip configured to seal within the central lumen of the sealing tip;
• and
• a handle assembly comprising a handle, the handle assembly configured to attach to a proximal end of the bleed valve needle, wherein rotating the handle in a first direction moves the distal tip of the bleed valve needle into the central lumen of the sealing tip to seal the central lumen and rotating the handle in a second direction moves the distal tip of the bleed valve needle away from the central lumen of the sealing tip.