Bruel & Kjaer 2651/2805 Charge Amplifier

Bruel & Kjaer 2651/2805 Charge Amplifier
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Bruel & Kjaer 2651 / 2805
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Features:

  • General purpose vibration and shock measurements particularly with Uni-Gain® Accelerometers
  • Multichannel measuring systems and vibration test control loops
  • Preamplifier for piezoelectric impedance heads and force transducers
  • Wide frequency range 3 Hz to 200 kHz
  • Output sensitivity settings of 0,1 - 1 - 10 mV/pC
  • Built-in integrator converts acceleration signal to velocity
  • Grounded, plus Floating input mode isolated from output ground
  • Switchable lower frequency limits

 

Specifications:

Charge Input via 10-32 UNF coaxial and multi-pin screened sockets
Input Modes "Grounded"
"Floating"
Amplifier Sensitivity 0,1 mV/pC, 1 mV/pC and 10 mV/pC
Signal Output Via 10-32 UNF coaxial and multi-pin screened socket
Max Output: 10 V (10 mA) peak
DC Offset: < ± 0 mV with dual polarity supply or half single polarity supply voltage
Frequency Range 3 dB Lower Limit: 1 Hz for all three sensitivity settings or 0,003 Hz; 0,03 Hz and 0,3 Hz for 0,1; 1 and 10 mV/pC respectively
3 dB Upper Limit: >200 kHz for 0,1 and 1 mV/pC sensitivity and > 150 kHz for 10 mV/pC
Integrator Converts acceleration to velocity proportional signal
Frequency Range: 10 Hz to 10 kHz (-10% limits)
Power Requirements Dual Polarity: ±6 to ±18 VDC
Single Polarity: +12 to +35 VDC
Supply Current: 15 mA nominal increasing to 30 mA with "Overload" LED lit

 

Bruel & Kjaer 2805 Power Supply

  • Power supply for preamplifiers in vibration measurement set-ups
  • Power supply for instruments operating on 14 V and 28 V DC
  • Used for supplying the following instruments with the direct current necessary for their operation:
    • Charge Amplifiers types 2634, 2635 and 2651
    • Accelerometer Calibrator Type 4291
    • Vibration Meter Type 2511
    • Tunable Band Pass Filter Type 1621
  • 12 outputs, 2 channels
  • ±14 V or 28 V or DC output

 

Specifications:

Output 2 channels short circuit protected
Output Connections For each channel 5 x 10 - 32 UNF sockets, also 1 x 6 pin Bulgin plug JP 4705
Output Voltage 28 Volts or ± 14 Volts
Output Current Max. 200 mA per channel
Power Requirement 100, 115, 127, 220, 240 Volts (50 to 400 Hz)