Signal conditioners

The electrical output of the thermocouple varies with temperature. This output is fed through a flexible cable to an external signal-conditioner circuit to amplify and condition the signal for interfacing to the monitoring system. 

A crystal material is excited by the force imposed on it by an internal I v mounted mass. A voltage is produced by the crystal proportional to accel eration. This voltage is then amplified by a charge amplifier type signal conditioner from whence the signal can be transmitted long distance. (1.000 feet is not uncommon) to the monitor/readout unit. It is calibrated in terms of gravitational units (g), which are proportional to force. Force is ttnc of the most reliable indicators of equipment distress. 

FTMA is a forced vibration test method based on direct measurement of stress and strain spectra. As with all forced vibration methods, FTMA is subject to spurious wave effects at high frequencies. The lower frequency limit is determined by transducers, signal conditioners, etc. The lower limit in this research was 35 Hz as determined by the inherent properties of the piezoelectric transducers. With different transducers (for example load cell for the force and LVDT for displacement measurements) and signal conditioners, FTMA should measure material properties down to much lower frequencies. 

The synchronous demodulator (4) eliminates the quadrature signal. This demodulator multiplies the input signal with a reference signal, which is generated by the sensor drive velocity. The signal conditioner (7) corrects any time delay and phase shift, because the reference signal has to relate in the phase exactly to the velocity of the sensor drive. 

Fig. 7.2.3 Block schematic of a capacitive yaw-rate sensor system 1, sensor element 2, drive control unit 3, capacitance to voltage converter 4, synchronus demodulator 5, amplifier 6, low pass filter 7, signal conditioner for the reference phase 8, control unit...

The scheme In Fig. 2.6, reproduced from Barbara [16], Is Illustrative of a data acquisition system. The measured variable generates an electrical signal at the transducer whose nature and oscillation range Is matched to the ADC via a signal conditioner —usually consisting of one or several operational... 

Fig.l Schematic diagram of the FR apparatus 1 Sorbate inlet 2 Valve 3 Electromagnets 4 Moving disc 5 Bellows 6 Rotary and turbo drag pumps 7 Computer with A/D and D/A cards 8 Adsorption vessel with zeolite in glass-wool 9 Vacuum connectors 10 Differential Baratron 11 Signal conditioner 12 Reference pressure side... 

Failures to this equipment can occur in the gamma thermometers or the signal conditioners, resulting in erroneous flux level readings. Because there are five strings of IFMUs, a failure in one or several detectors reduces the amount of data available to map the axial power offsets. These failures have no immediate effect on the plant operation. 

Signal conditioning. The response signal from any sensor must be adapted/converted into a voltage or current signal that the A/D converter electronics can understand. This can be done by a local signal conditioner, or by an electronic circuit on board. 

Sensors/Signal Conditioners—Analog Use solid-state sensors or signal conditioners with a 4-20 mA DC output. 

The signal conditioner accepts the electrical output of the transducer and transmits the signal to the comparator in a form compatible with the reference input The functions of the signal conditioner include... 

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