METHOD FOR ENCAPSULATING ENCAPSULATION LIQUID OF DIFFERENTIAL PRESSURE SENSOR

• Main Author: TAKAI MUNENORI
• Format: Patent
• Language: English
• Published: 12.09.2013
• Subjects: MEASURING; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; PHYSICS; TESTING

PROBLEM TO BE SOLVED: To eliminate a zero point adjustment mechanism of a differential pressure sensor, to eliminate necessity to adjust a zero point as an independent process after completion of assembly of the differential pressure sensor, and to guarantee long term stability of zero point adjustment.SOLUTION: Encapsulation chambers 6-1 and 6-2 are made into vacuum, a medium 5-1 for transmitting pressure is encapsulated in the encapsulation chamber 6-1, and a medium 5-2 for transmitting pressure is encapsulated in the encapsulation chamber 6-2. Then, the medium 5-2 for transmitting the pressure is sealed in the encapsulation chamber 6-2, a signal P to be output from a sensor diaphragm 3-1 is monitored while performing pressure encapsulation of the medium 5-1 for transmitting the pressure, when it is confirmed that the signal P reaches a setting value which is preset as a zero point output value, the pressure encapsulation of the medium 5-1 for transmitting the pressure is terminated, and the medium 5-1 for transmitting the pressure is sealed in the encapsulation chamber 6-1.