Testing apparatus for a dual pressure indicator and control unit for pasteurization equipment

Testing apparatus for a dual pressure indicator and control unit of the kind used to monitor and control pasteurizing equipment, said unit having two pressure ports with indicating means associated therewith, said unit also having control means operable in response to a predetermined pressure differential between said ports, said pressure ports being connected in use to pressure sensors at a pasteurized product outlet and a raw product inlet respectively in such pasteurizing equipment, said testing apparatus comprising:

• valve means;
• input conduit means at the input side of said valve means and adapted to be connected to a fluid pressure source;
• two output conduits adapted to be connected respectively to the two pressure ports of a pasteurizing system dual pressure indicator and control unit;
• a pressure gauge connected to each of said output conduits;
• two manually adjustable pressure regulators connected to said input conduit means;
• means for selectively placing said valve means in a tracking test mode or a differential test mode;
• said valve means in said tracking test mode connecting said input conduit means simultaneously to both of said output conduits via a single one of said pressure regulators to thereby apply identical pressures determined by said one pressure regulators to both of said output conduits;
• and
• said valve means in said differential test mode connecting said input conduit means simultaneously to both of said output conduits via separate ones of said pressure regulators to thereby apply different pressures determined by the respective pressure regulators to the two output conduits.

Testing apparatus for a dual pressure indicator and control unit of the kind used to monitor and control pasteurizing equipment, said unit having two pressure ports with indicating means associated therewith, said unit also having control means operable in response to a predetermined pressure differential between said ports, said pressure ports being connected in use to pressure sensors at a pasteurized product outlet and a raw product inlet respectively in such pasteurizing equipment, said testing apparatus comprising:

• valve means;
• input conduit means at the input side of said valve means and adapted to be connected to a fluid pressure source;
• two output conduits adapted to be connected respectively to the two pressure ports of a pasteurizing system dual pressure indicator and control unit;
• a pressure gauge connected to each of said output conduits;
• two manually adjustable pressure regulators connected to said input conduit means;
• one of said pressure regulators being connected to one of said output conduits;
• means for selectively placing said valve means either in a tracking test mode or in a differential test mode;
• said valve means in said tracking test mode connecting said input conduit means to the other of said output conduits via said one pressure regulator to thereby apply identical pressures determined by said one pressure regulator to both of said output conduits;
• and
• said valve means in said differential test mode connecting said input conduit means to said other output conduit via the other of said pressure regulators to thereby apply different pressures determined by the respective pressure regulators to the two output conduits.