Atec 2236 User Manual
Product Data
Precision Int egrating Sound Level Meter — Type 2236
USES:
❍ Measuring environmental noise
❍ Measuring occupational noise
❍ Frequency analysis of sound sources
❍ Simultaneous RMS and Peak measurements with
independent frequenc y weighting
❍ Automatic logging of results
❍ Performs complete statistical ana lyses
❍ 40 records of m anually stored results
❍ Back-lit display
FEATURES:
❍ Conforms with IEC651 (1979) and 804 (1985) Type 1
❍ Conforms with ANSI S1.4 -1983 and Draft S1.43-
❍ Automatic-start allows for unattende d
measurements
❍ Optional octave filter
199X Type 1
❍ Calculates and displays L
Precision Integrating Sound Level Meter Type 2236 is a Type 1 instrument, designe d to meet string ent stand ards in environm ental- a nd occup ational- noise m easurement.
As Type 2236 is designed to fulfil the national standards and directives, all parameters can be obtained from the one measurement. This saves both time and money.
Measurements are displayed on a large (4 lines, 16 characters/line) LCD screen.
The SPL (RMS) is con tinuously monitored on a qua si-analogue display. The digital
output allows interfacing with personal computers and printers, for further data
processin g/presentat ion and p rinting.
The linearly-weighted AC output allows for a direct calibrated recording (on Digital
Audio Tape, for example), enabling later analysis.
values
N
*
* user-definable for USA, UK e and Japane se models
Description
Precision Integrating Sound Level
Meter Type 2236 has been designed
specifically for environmental- and
occu pation al-noise measur ements.
Double-detector
A unique feature of the 2236 is that
RMS and Peak detection occurs in
parallel. In this way the sound level
meter can display both the RMS value and the Peak value of the same
signal — particularly useful when
analyzing transients or impulses.
Intuitive User-interface
The clearly marked arrows and symbols on the front panel, combined
with the large LCD screen (with back
light) make the sound level meter
very easy to learn and use. The dis-
Brüel & Kjær
B
play is clear and concise, and an interactive dialog guides you through
your measurement, quickly and efficiently. Warnings are also given when
you attempt to change a set-up parameter once you have started your
measurem ent.
Statistics
The sound level meter has three use rdefinable L
ones for the International version).
With the USA and UKe models you
can also perform Level and Cumulative Distributions on the results, allowing basic statistics on the spot.
Real-time Clock
The 2236 sound level meter has a
real-time clock for marking results
with the date and time of any
measurement—particularly useful
for storing dat a for fut ure use or p res-
K
values (only two fixed
N
intervals. These band-pass filters
F
f
have centre frequencies of 31.5Hz,
63Hz, 125 Hz, 250 Hz, 500 Hz, 1kHz,
2kHz, 4kHz and 8kHz.
dB2XL Software
The dB2XL software allows you to
transfer the measurement results
from the sound level meter directly
into a Microsoft Excel spreadsheet,
and to produce basic graphs.
Fig.1 System setup for printing, recording and transferring results from the sound level
meter
entation. Th e clock can be set directly
from the front panel of the sound level m eter, or over t h e digi tal in terfa c e.
AC & D C Ou tpu ts
The AC output from the sound level
meter is the unweighted output signal from the preamplifier. This can
Auto-start
The real-time clock has a timer feature which allows you to set up the
sound level meter so that it automatically starts measuring at a predefined point in time (up to one month
ahead) .
be recorded on a DAT recorder, and
used for further spectral analysis and
noise source identification.
The DC output is the analogue
equivalent of whatever parameter is
currently being measured, except
that it does not include the correction
for the range and the microphone K-
Data Storage & Processing
factor.
For each individual measurement,
the sound level meter logs the time,
L
, and depending on the version,
eq
MaxL a nd MaxP, or L
and L90. This
10
information is stored as a set. You
can store up to 21600 sets of results
(for example, 6 hrs logging at 1 s in-
tervals) in the sound level meter’s
Printin g R esu lts
Once you’ve finished measuring you
can print your results, either on the
lightweight Graphics Printer Type
2318, Serial Printer Types WQ 1138,
EQ4001 or EQ4002, or any standard
serial pr inter.
128Kbyte non-volatile memory. These
results can be transferred in a
spreadsheet-compatible format via
the built-in serial interface to a PC
for additional analysis or graphical
presentation.
Simplified Calibration
The sound level meter employs a very
user-friendly calibration technique.
Once you have fitted the calibrator
(Sound Level Calibrator Type 4231,
Multifunction Acoustic Calibrator
Interfacing to External Devices
The sound level meter communicates
to external devices via the interface.
By using the 9-pole to LEMO Cable
AO 0404, and 9-pole Cable with 25-
Type 4226 or a similar calibrator),
the sound level meter calculates the
correction and prompts you either to
continue with the old calibration, or
do an automatic re-calibration.
pole Adaptor AO 1386 you can easily
connect the sound level meter to
Graphics Printer Type 2318, a PC or
a serial printer.
Optional Features
The AC output of the sound level
meter can also be connected to a DAT
recorder via LEMO to BNC Cable
AO0403.
Internal Filters
Type 2236 is also available with nine
built-in
1
/1-oct ave fi lter s at 1/1-octav e
Reporter
TM
Software
This, more comprehensive software,
allows you to generate reports from
the measurement results obtained
from the sound level meter and display them.
Accredited Calibration
The sound level meter can also be
sold with an accredited calibration
that conforms to IEC651 and
IEC804.
Example Printout
Fig. 2 shows a print out from G raph-
ics Printer Type 2318 for a Level Distribution measurement.
Micros oft is a regi stered t radem ark of Micr o-
soft Cor poratio n
ig.2 Printer (24 character/line) output
ormat with short heading
2
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