A deadweight tester is used to provide a standard reference pressure for the calibration of a pressure transducer A combination of 253 kgf of 762cmdiameter stainless steel disks is needed to balance the tester piston against its internal pressure For an effective piston area of 5065 cm2 and a piston weight of 535 kgf, determine the standard reference pressure in bars, Nm2, and Pa abs Barometric pressure is 770 mm Hg abs, elevation is 20 m, and latitude is 42 degrees