Method for filling the measuring chamber of a transducer measuring pressure or pressure differential with a pressure transmission liquid and a pressure differential measuring transducer

A method of filling a measuring chamber of a transducer with a pressure transmission fluid through a filling channel, the transducer measuring a pressure or pressure differential with the pressure transmission fluid, the method comprising:

• inserting into the filling channel a filling pin having a longitudinal channel over part of a total length of the filling pin, the filling pin being inserted to an extent that an open connection of the measuring chamber to the outside remains;
• evacuating the measuring chamber;
• after evacuating the measuring chamber, introducing the pressure transmission fluid into the measuring chamber through the longitudinal channel of the filling pin and the filling channel under an influence of gravity, the pressure transmission fluid being under vacuum;
• and
• after introducing the pressure transmission fluid, introducing a supplementary amount of pressure transmission fluid into the measuring chamber by pushing the filling pin into the filling channel beyond an outside end of the longitudinal channel of the filling pin to establish a defined working voltage of pressure transmission fluid in the measuring chamber.