Proximity probes provide very strong relative displacement outputs at low frequencies. However, they are difficult to install and, due to filtering in their electronics, give very little information [...]
General purpose accelerometers (100 mV/g), low frequency accelerometers (500 mV/g), and piezovelocity transducers (100 mV/ips) are specified depending upon the machine speeds, amplitude levels and me [...]
The difference between the power supply and the bias voltage and the ground and the bias voltage determines the amount of AC voltage the amplifier can swing (amplitude range). When using sensors with [...]
The bias voltage, sometimes referred to as the rest voltage, is required to measure AC signals using two wire single ended amplifiers. The DC bias voltage provides a carrier on which the AC signal is [...]
Low noise components should be used, but the most effective way to lower amplifier noise is to decrease amplifier gain. This is done by using high output sensing element assemblies most notably, thro [...]
All electronic components produce some electrical noise. At high frequencies, amplifier noise is governed by circuit resistors in the form of Johnson Thermal or white noise. Low frequency noise is go [...]
With their high sensitivity output and consequently lower amplitude range, low frequency/ high output sensors are vulnerable to overload especially in the presence of significant high frequency vibra [...]
No. A sensor with additional electronic gain will produce the desired effect of increasing the amplitude of vibration output of the low level signal. However, this technique will also produce the und [...]
While many general-purpose 100 mV/g accelerometers carry a low frequency -3dB specification of 0.2 Hz to 0.5 Hz, they are not the best choice for accurate measurements on slow-speed machines. That is [...]
A high pass filter is inherent to electronics of all piezoelectric accelerometers. The filter has a resistor and capacitor in series and the value of these components, RC, determines the low-end cut- [...]
