Uses
- Vibration measurement on aircraft
- Measurement of vibration in severe environments
- Vibration monitoring on industrial machinery
- General vibration measurement
| Features
- Complies with MIL – STD 810 D
- Sensitivity adjustable from 1 to 100 mV/pC
- Differential and single-ended inputs
- Adjustable high- and low-pass filters
- Adjustable output bias
- Overload detection
- Rugged construction
- Power supply: single or dual polarity
|
Preamplifiers Types 2663 and 2663 B are charge amplifiers designed for use with piezoelectric transducers in airborne applications. Type 2663 has a preadjusted frequency range of 0.5 Hz (– 3 dB) to 33 kHz (– 3 dB) whereas Type 2663 B has a frequency range of 0.5 Hz (– 3 dB) to 100 Hz (– 3 dB).
Gain and frequency range can be adjusted by exchanging appropriate resistors in the preamplifier circuit to meet user requirements. For operation with different types of transducers, the preamplifiers have three built-in choices of input configuration. It can be used with both single-ended grounded and single-ended floating transducers as well as differential types. The rugged case of the preamplifier is constructed from milled aluminium. The removable side cover is fitted with a rubber seal which protects the electronics from dirt, oil, humidity and other environmental contamination.
The preamplifier can be powered from either a single-ended or dual-polarity supply. The input connector is a 2-pin TNC socket. The output connector is a 6-pin bayonet socket containing both AC and DC signal output pins and two pins for the power supply. It also contains the overload detector pin, which is pulled high during overload, and the signal ground pin. The input amplifier is a differential charge amplifier and the frequency range of the preamplifiers is determined by the low-pass and high-pass filter pair.
The high-frequency cut-off is determined by a 2-pole Butterworth low-pass filter preadjusted to 33 kHz (–3 dB) for Type 2663; 100 Hz (– 3 dB) for Type 2663 B. The cut-off frequency may be adjusted between 250 Hz and 33 kHz, and with reduced specifications to 200 kHz. The low-frequency cut-off is determined by a 4-pole Butterworth high-pass filter and is pre-adjusted to 0.5 Hz (–3 dB). Two poles of the filter are adjustable to give a cut-off frequency from 0.5 Hz to 1 kHz. For frequencies greater than 3 Hz, the sensitivity is adjustable between l mV/pC...
For a full Description and Specifications, see 
Product Data
