Uses
- Field and laboratory measurement of vibration in terms of acceleration, velocity and displacement together with piezoelectric accelerometer and voltmeter or measuring amplifier
- Field recording of vibration and other signals together with portable tape recorders and level recorders
- Underwater sound measurements with hydrophone
- Mechanical impedance measurements
| Features
- Charge Input
- 3 digit conditioning to transducer sensitivity
- Unified output ratings for simplified system calibration
- High sensitivity up to 10 V/pC
- Built-in integrators for displacement and velocity
- Switchable low and high frequency limits
- Built-in test oscillator
|
Where transducers with a high temperature transient sensitivity are used, the high-pass filter in the input of the 2635 can be switched from 0.1 Hz to 1 Hz (- 3 dB) in order to reduce interference from signals originating from low frequency temperature fluctuations.
The special low-pass filter to limit the frequency range to 100 Hz (-10%) is used when recording vibration signals on tape for subsequent analysis in accordance with ISO 2631 (Guide for the evaluation of human exposure to whole-body vibration). These measurements are performed on passenger vehicles, tractors, and other machines where the human body as a whole is subjected to vibration.
The low frequency limit is extended down to 0.1 Hz (- 3 dB) in the linear mode to take advantage of the very low temperature transient sensitivity of Brüel & Kjær’s Delta Shear accelerometers and force transducers at these low frequencies.
The output amplifier features a three-digit sensitivity adjustment network which enables the 2635 to be conditioned to suit transducer sensitivities between 0.1 and 11 pC/unit. This feature greatly simplifies the calibration and reading of a measuring system, especially when using transducers which have “odd” sensitivity values (non Uni-Gain types).
For a full Description and Specifications, see
Product Data
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