Pressure gauge 1 to be tested is screwed into one of the pipe connections of a manifold which communicates with horizontal tank 2 and vertical cylinder 3 filled with a liquid. The volume of tank 2 can be varied by means of a piston adjusted horizontally by screw 4. Inserted into the vertical cylinder is plunger 5 with plate 6 which by their weight develop a pressure in the tank and manifold. The weights of the plunger and plate, as well as that of weights 7, and the cross-sectional area of the vertical cylinder are strictly specified. Loading the plate consecutively with weights 7, the readings of the pressure gauge are checked.
$3721$SHP,M$