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5 Performance Measurement
the change of an electrical capacitor (1 capacitor plate moves along with the diaphragm) or by generating a piezoelectric voltage (voltage within a crystal due to
strain). Capacitive measuring is mainly suitable for low pressure, piezoelectric for
high pressure. There are transducers for very various pressure ranges and very various frequency responses. The voltage signal is read into a computer system through
an electronic circuit board.
5.1.3 The Digital Manometer
A digital manometer functions according to the same principles as a pressure transducer. Reading out is done from a digital display. There are handheld devices with
built-in transducer and display. With a handheld device, connections must be made
between the device and the pressure measurement point. This is only workable for
pressure measuring in air.
Fig. 5.2 The pressure transducer
Fig. 5.1 The metal
manometer
5 Performance Measurement
the change of an electrical capacitor (1 capacitor plate moves along with the diaphragm) or by generating a piezoelectric voltage (voltage within a crystal due to
strain). Capacitive measuring is mainly suitable for low pressure, piezoelectric for
high pressure. There are transducers for very various pressure ranges and very various frequency responses. The voltage signal is read into a computer system through
an electronic circuit board.
5.1.3 The Digital Manometer
A digital manometer functions according to the same principles as a pressure transducer. Reading out is done from a digital display. There are handheld devices with
built-in transducer and display. With a handheld device, connections must be made
between the device and the pressure measurement point. This is only workable for
pressure measuring in air.
Fig. 5.2 The pressure transducer
Fig. 5.1 The metal
manometer