BRUEL & KJAER 1625 Instruction Manual

Instruction Manual
1 /3 - 1 /1 Octave Filter Set Type 1625
Briiel
a
KJar
Type 1625
Fast~
Slow
Recording Sptled
Filter Step
~~·
·~
•
Step Size
1 / 3!1ji;/ 1 Oct.
1 / 3 111 11 1 Oct.
Bandwidth
1 / 3 ..... 1/1 Octave Filter Set
A portable Band Pass Filter Set primarily in-
tended for use with Sound Level Meter Type
2230, 2231 or 2233. Permits third-octave
frequency analysis, and octave frequency
analysis with a step of octave or third-oc-
tave. Fully automatic recording of the analy-
sis is possible with a Level Recorder Type
2317, 2306 or Type 2309. The scanning of
the filter and the Level Recorder are fully
controlled by the Filter Set to obtain an op-
ti'Tlal recording. Two scanning speeds are
available for analysis of levels measured
with "Slow" or "Fast" time weighting.
The selectable centre frequency range is
from 20Hz to 20kHz and a linear position
gives a frequency band from 3Hz to 75kHz.
The analysed signal may also be weighted
by selecting "A" or "C" frequency weight-
ings on the Sound Level Meter.
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BrUel
&
Kjrer