HVACR How To Use AC Refrigeration Gauges Manifold Gauge Set Everything You Need To Know Vacuum test range -101 Kpa 0 Kpa. Wish we can solve the problem peacefully. Pressure test accuracy +/- 0.5 %(FS)+ 5dgt. Temperature test unit °C (Celsius), °F (Fahrenheit). Refrigeration digital manifold gauge set hvac system 93 refrigerant detection your kindly understanding and great patience would be highly appreciated!