BRUEL & KJAER 2204 - Use of External Filters

Temperature Coefficients
Velocity,
+ o.o2 dBrc
Displacement + o.04 dBrc
UH of External Filters.
The Sound Level Meter may be used in conjunction with external filters such
as the Octave Filter Set Type 1613 or the Band-Pass Filter Set Type 1612
containing both octave and 1/3 octave filters. The Octave Filter Set Type 1613
may be joined to the Sound Level Meter to make a portable sound and vibra-
tion analyzer.
To connect the Band-Pass Filter Set Type 1612 two cables
AO 0007 are employed. The Type 1612 requires a DC voltage of 9 V which
can
be supplied from a small battery.
When external filters are employed the instrument is operated as described
under "Measurement of Sound" on page 21, except for Item 5 which should
read:
Set KNOB 1 to "Ext. Filt.".
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