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Instruction Manual
Integrating Sound Level Meter Type 2225
Integrating Impulse Sound Level Meter Type 2226
1-~-~-1
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Type 22211
033-0523
Two portable Sound Level Meters with easy-
to-read "thermometer" display, complying
with IEC 651 Type 2*, DIN 45634 and
ANSI S1 .4 - 1971 Type S2A. An A-weight-
ing network is built-in. "Fast" and
"Slow"
time constants and a one minute L
eq
easily
converted to SEL (LAx) on both meters. In
addition the 2225 has a "Peak" hold and
the 2226 an
"Impulse"
function and
"Max.
hold" facility on all time constants. The
measuring
range
from
25 dB(A)
to
1 40 dB(A) peak is covered in 4 overlapping
40 dB(A) ranges. Automatic reset and other
features enable operators to make accurate
valid measurements after a short period of
familiarisation. DC output to a level recor-
der.
Supplied with Prepolarised Condenser Mic-
rophone Type 4175
•
except for
"Max
.
hold" on 2225
+
BrUel
&
Kjaer
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