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1621 - Bruel & Kjaer Tunable Filters


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  • Model: 1621
  • Manufactured by: Bruel & Kjaer
  • High end frequency limit: 20.00kHz
  • Channels: 1
  • Operation Modes: BP
  • Extra Specifications: Tuneable Band Pass Filter

The Tuneable Band Pass Filter Type 1621 is a variable filter intended for use with the general purpose B&K 2511 Vibration Meter for narrow band frequency analysis of vibration levels.

  • Frequency Range: 0.2 Hz to 20 kHz in 5 ranges
  • Pass Bandwidths: switchable : 3 % or 23 % (1/3 octave) Attenuation at 1/2 and 2 x selected frequency : switchable 34 or 16 dB
  • Dynamic Range: > 40 dB RMS with 3 % bandwidth between 0.2 Hz and 6 kHz > 35 dB RMS with 3 % bandwidth between 6 kHz and 20 kHz > 40 dB RMS with 2 % bandwidth between 0.2 Hz and 20 kHz
  • Accuracy of Indicated Frequency: qu± 1.5 % at 25 °C with additional ± 0.04 % per °C
  • BNC Input: 1 V RMS or 0.2 V RMS switchable with crest factor of 5 Impedance 1 V input : 1 MΩ in series with 10 µF Impedance 0.2 V input : 200 kΩ in series with 10 µF
  • BNC Output: Impedance: 0.5 Ω in series with 100 µF Load Impedance: > 25 kΩ Gain: 0 dB ± 1 dB
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