BRUEL & KJAER 1617 - Operation with Vibration Meter Type 2511

Sound
Level
Meter
2209
AO 0007/AO 0116
Ba nd Pa ss Filter 1617
Fig. 3. 12 . Arrangement for frequency analysis with a Sound Level
Meter
2. Perform the preliminary checks, adjustments and calibration of the Sound Level Me-
ter as detailed in its Instruction Manual .
3. Perform the preliminary adjustments for the Band Pass Filter as described in section
3.1.
4 .
Set the Band Pass Filter controls as detailed in section 3.2.1 / 5.
5. Set the Sound Level Meter controls as follows :
OUTPUT
ATIENUATOR
(transparent) Fully clockwise (= minimum gain) with the red
lines next to the red spot
INPUT ATIENUATOR
(black) "130 dB" (= minimum gain)
6.
Turn the METER SWITCH to " Fast" or "Slow" , "Linear" and pull the knob out to acti-
vate the Type 2203 .
7 .
Turn the WEIGHTING NETWORK SWITCH on the Type 2209 to " Linear" .
8. Set the METER SWITCH on the Type 2209 to "Fast" , "Slow", "Impulse", "Impulse
Hold" , or " Peak Hold" as applicable, thereby switching the instrument on.
9.
Turn the Attenuators using all the adjustment of the black disc first, then the trans-
parent, if necessary, to obtain the highest possible reading on the meter .
10 . Set the METER SWITCH on the Type 2203, or the WEIGHTING NETWORK SWITCH
on the Type 2209 to " External Filter" to bring the Band Pass Filter into operation.
11. If necessary, turn the OUTPUT ATIENUATOR (transparent) to obtain a meter reading
between "0" and "+ 1 0" dB if possible, from the signal in the frequency band being
measured. However, once the
INPUT ATIENUATOR has been adjusted to the overall
(linear) level
of the incoming signal, it should not be moved without repeating points
6 to 10 , even though the meter reading may drop for some frequencies .
12 . Select the next frequency band, and take the new measurement.
3.4.2. Operation with Vibration Meter Type 2511
Use with the Vibration Meter enables the measuring arrangement to measure and ana-
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