Atec 2236 User Manual

Product Data
Precision Int egrating Sound Level Meter — Type 2236

USES:

Measuring environmental noiseMeasuring occupational noiseFrequency analysis of sound sources
Simultaneous RMS and Peak measurements with
independent frequenc y weighting
Automatic logging of resultsPerforms complete statistical ana lyses40 records of m anually stored resultsBack-lit display

FEATURES:

Conforms with IEC651 (1979) and 804 (1985) Type 1Conforms 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.
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

Specifications 2236

STANDARDS:
Conforms with IE C 651 (1979) and 804 (198 5)
Type 1, and ANSI S1.4 – 1983 and D raft S1.43, 6th September, 1992 Type 1
1
/1-octave filter set conforms with IEC225–1966 and ANSI S1.11–86, order 3, Type 1–D (Types 2236 C and 223 6 D only)
MEASURING RANGES:
Range
(dB)
Max.
Upper limit (RMS ) for Peak level
signals with crest factor = 10 (20dB)
10* – 90 93 73
20† – 100 103 83
30 – 110 113 93 40 – 120 123 103 50 – 130 133 113 60 – 140 143 123
* Only available with Types 2236 C and 2236 D when
filter selected. Level non-linearity caused by noise floor is <0.4 dB at 30 dB(A) (re IEC 651) and < 1 dB at 26 dB(A)
† Level non-linearity caused by noise floor is <0.4 dB at
30 dB(A) (re IEC 651) and < 1 dB at 26 dB(A)
NOISE FLOOR: Typically: 18dB (A) Maximum: 20dB(A) RMS
Includes preamplifier ’s electrical noise and mi­crophone’s thermal noise
DETECTORS:
Simultaneous RMS and Peak with independent frequency weightings
Linea rit y Ra nge: 80 dB Pulse Range: 83 dB Non-linear Distortion: Too small to affec t ac-
curacy
Peak Detector Rise Time: <50µs FREQUENCY WEIGHTING:
Selected independen tly for RMS and Peak
RMS:
A, C according to IEC 651 Type 1 L: flat from 10 Hz to 20k Hz (± 2 d B) with Type 1 tolerances
Peak:
C according to IEC 651 Type 1 L: flat from 10 Hz to 20k Hz (± 2 d B) with Type 1 tolerances
FILTER (only available with Types 2236 C and 2236 D): Band-pass Filters: Nine
1
/1-octave intervals (base 10) Centre Frequencies: 31.5, 63, 125, 250, 500 Hz, 1, 2, 4, 8 kHz
Maximum Noise Floor in Each Frequency Band:
1
/1-octave filters at
See diagram for details
25
20
15
Noise/dB
10
31.563 125 8 k CA LIN Frequency Hz
941683e
TIME WEIGHTING:
Int. USA UKi UKe Jap.
S, F, I S, F, I S, F S, F, I S, F, I
according to
IEC 651 Typ e 1
DISPLAY:
4 line LCD showing:
• Measuring range and quasi-analogue bar showing input signal
• Batter y low, pause and overload with hold in­dicators
• Time weighting and elapsed measurement time
• Fre quency weighting (Peak or RMS ) or filter centre frequency (only available with Types 2236 C and 2236 D), selected parameter with level
Optional b ack-light The quasi-ana logu e bar i s update d 15 times p er second Displayed parameter level updated once per sec­ond
PARAMETERS: Common (and UKi only): MaxL, MinL, MaxP,
Peak, SPL, L of measurement time
Specific:
, SEL, L
eq
and Overload in %
EP,d
Int. USA UKe Jap.
L
Im
Inst. IEL LAE LCE LLE L
AV,4
L
AV,5
Var iab l e L Defaults
(fixed for Int. Versi on )
N
L
95
L
5
✓ ✓ ✓ ✓
L
L
90
L L
90
L
50
50
L
10
1
L
95
L
50
L
5
Resolution:
Va lu es : 0.5dB
L
N
Other Par ameters: 0.1 dB EXCHANGE RATE:
Int. USA UKi UKe Jap.
3 3, 4, 5 3 3 3, 5
RESET:
Resets Buffer (includin g elapsed time) to zero. Warning prior to reset if e lapsed time > 1 min. Reset when changi ng frequency or time weigh t­ing Resets all results in L og, Memory and Buffer if held down together with Data Optional reset when changi ng level of meas ure­ment range (L is without reset)
MICROPHONE:
Type 4188 prepolarized free-field microphone
Sensitivity: –30dB re 1V/Pa ±2dB Frequency Range: 8Hz to 12 .5k Hz ± 2dB Capacitance: 12 pF
s not available if range ch ange
N
1
/2″ condenser
MEMORY:
40 Records of Overall Results
RESULT LOGGING:
Int. USA UKi UKe Jap.
L
L
L
L
eq
MaxL L MaxP L
Log
Log
Rate
Cap.
eq
eq
MaxL L
10
MaxP L
90
Int. USA UKi UKe Jap.
L
eq 10 90
eq
L
5
L
95
0.1s*36 m 1s 6 h 10 s 21/2 d 30s 71/2 d 1m 15 d 5m 75 d 10 m 150 d 15 m 225 d 30 m 450 d 60 m 900 d
* only Leq logged at this rate
Logged To: log or inte rface Memory Capacity: 128Kbytes (Types 2236 A
and 2236 C). Equivalent to 21600 sets of results (for example, 6 hrs of 1s logging). 512 Kbytes (Types 2236 B and 2236 D ). Equiv­alent to 86400 sets of results (for example, 24hrs of 1s logging)
SERIAL INTERFACE:
Compatible with EIA – 574 Compatible with EIA–232–E wi th 2 5-p ole adap ­tor Baud Rate: 1200 – 19200 (1200 – 9600 for Japanese v ersion)
Data Bits: 8 Stop Bit: 1 Parity: None Handshake: Hardwire, XON/XOFF or None
Result Output Formats
Int. USA UKi UKe Jap.
Overall Logged
(Printer) Logged
(2318)
Logged
(Spreadshe et) Level
Distribut ion Cumulative
Disribu tion
Distribution Resolution (dB)
Heading: Long or short (only short for USA model)
DC OUTPUT:
Short-circuit protected coaxial LEMO socket (se­ries 00)
1 or 5 1 or 5 0.5, 1,
2, 5,
10
3
B
K
Output: 50mV/dB equivalent to 0 – 4.15 V Output Resistance: 100 Output Pa ramete r: Same as the Di splayed Pa-
rameter (Detector Output on J apanese model) Upda ted: every second (160 times/second for Japanese model)
AC OUTPUT:
Short-circuit protected coaxial LEMO socket (se­ries 00) Max. Output: 0.5 V RMS correspond ing to the top of the selected measurement range ±2dB depending on th e microphone ’s sensitivity
Output Resistance: 100 Output: Output signal from preamplifier (L fre-
quency weighting)
CLOCK:
Real-time (calendar) and meas urement duration Facto ry set to CET (GMT+1)
WARM-UP TIME:
<5s
SETTLING TIME: At Range Change without Res et: <4ms
CALIBRATION CONDITIONS: Reference Frequency: 1000 Hz Reference SPL: 94dB

Ordering Information

Reference Range: 50 –130dB (set automatical­ly during ca libration sequen ce)
Reference Direction of Incidence: Frontal Calibration Correction with Extension Cable:
0dB
ENVIRONMENTAL EFFECTS: Storage Temperature: –25 to +70°C (–13 to
+158°F) Operating Temperature: – 10 to +50 °C (14 to
122°F)
Effect of Temperature: <0.5 dB (– 10 to + 50°C ) Effect of Humidity: <0.5dB for 30%<RH<90%
(at 40° C, 1 kHz) VIBRATION SENSITIVITY:
<80 dB with L-weight ing at 1m/s
EFFECT OF MAGNETIC FIELD:
80 A/m (1Ørsted ) at 50Hz gives < 34d B (L)
ELECTROMAGNETIC COMPATIBILTY: Designed to Fulfil: Emission :
EN50081– 1: residential, commercial and light industry (including EN55022 class B) EN 50081 – 2: industrial environment FCC class B part 15 J CISPR22 class B
Immunity:
–2
EN50082– 1: residential, commercial and light industry prEN5 0082 – 2: industrial environment
BATTERIES:
Four 1.5V LR6/AA size alkaline cells Lifetime (at room temperature): Typically > 12h rs for Types 2236 A and 2236 B Typically > 10h rs for Types 2236 C and 2236 D
Internal back-up battery: Charging time: ~ 10h ours (1st t ime)
Keeps clock and memories operating for at least 6mo nths (typically) if fully charged
EXTERNAL POWER SUPPLY:
Must fulfil the following speci fications
Voltage: regulated or smoothed 7 –15 V DC Voltage Ripple: <100m V peak to p eak Maximum Current: 400 mA Average Current: ~100 mA at 7 V Socket:
Pin: Positive Casing: Signal Ground Pin Diameter: 2.0 mm External Diameter: 5.5mm
PHYSICAL CHARACTERISTICS: Size: 25 7× 97 × 41 mm Weight: 460g (including batteries)
2236A –xxx Precision Integrating Sound Level 2236B –xxx Precision Integrating Sound Level 2236C –xxx Precision Integrating Sound Level
2236D –xxx Precision Integrating Sound Level
The
English-languag e version.
Vers io n – xxx Extension
International (Int.) – 002 United States (US) – 007 United Kingdom
Industrial-noise (U Ki) United Kingdom
Environmental- an d Industrial-noise (U Ke)
Japanese (Jap.) – 010
Meter with 128 Kbyte memo ry Meter with 512 Kbyte memo ry Meter with 128 Kbyte memory and
1
/1-octave filter s et
Meter with 512 Kbyte memory and
1
/1-octave filter s et
–xxx
extension refers to the particular
– 008
– 009
Brüel &Kjær reserves the right to change specifications and accessories without notice
Includes the following accesso ries:
4 × QB0013 1.5 V LR6/AA alkaline cells Type 4188 Prepolarized Free-fiel d
KE 032 3 Shoulder Bag UA 1236 Protective Cover
Microphone
1
/2”
Optional Accesso ries
For Measuring: Type 4231 Sound L evel Calibrator Type 4226 Multifuncti on Acoustic Calibrator UA 1251 Tripod UA 0801 Tripod UA 1254 Micr ophone Holder (for tripod) UA 0459 Wi ndscreen (∅ 65 mm) AO 04 08 Microphone Extension Cable (3m) AO0409 Microphone Extension Cable
ZT 03 26 Octave Filter Set Upgrade Type 4189 Prepolariz ed Free-field
For Transferring Results to a PC: AO 1386 9-pole Cable with 25-pole Adaptor
(10m)
Microphone
1
/2”
For Recording on a DAT Recorder, Transferring Signals to an Analyzer or Using with Headphones: AO 04 03 LEMO to BNC Cable
For P rin ting: Type 2318 Graph ics Printe r WQ 1138 Serial Printer (Euro version) EQ 4001 Serial Printe r (US version ) EQ 4002 Ser ial Printe r (UK version ) AO 0404 9-pole to LEMO Ca ble (for 2318) AO 13 86 9-pole Cable with 25-pole Adaptor
Upgrades: ZT 0326 Octave Filter Set (for A an d B
Carrying Case : KE 0325 Carrying Case with insert for
Services available with del ivery: EK 0102 Accredited Calibration re IEC651
(for se rial pr inter )
models)
sound level meter, Sound Level Calibrator Type 4231, Serial Printer WQ 1138 and Tripod UA 1251
and IEC 804
Brüe l & Kjær
WORLD HEADQUARTERS:
DK-2850 Naerum · Denmark · Telephone: +45 45 80 05 00 · Fax: +45 45 80 14 05 · Internet: http://www.bk.dk · e-mail: info@bk.dk
Australia (02 ) 9450-2066 · Austria 00 43-1-865 74 00 · Belgium 016/44 92 25 · Brazil (011) 246-8166 · Canada: (514) 695-8225 · China 10 6841 9625 / 10 6843 7426 Czech Republic 02-67 021100 · Finland 90-229 3021 · France (01) 69 90 69 00 · Germany 0610 3/908-5 · Holland (0)30 6039994 · Hong Kong 254 8 7486 Hungary (1) 215 83 0 5 · Italy (0 2) 57 60 414 1 · Japan 03 -3779-8671 · Republic of Korea (0 2) 3473-0 605 · Norway 66 90 4410 · P oland (0- 22) 40 93 92 · Portuga l (1) 47114 53 Singapore (65) 275-8816 · Slovak Republic 07-37 6181 · Spain (91) 36810 00 · Sweden (08) 71127 30 · Switzerland 01/94 0 09 09 · Taiwan (02) 713 9303 United Kingdom and Ireland (0181) 954-236 6 · USA 1 - 800 - 332 - 2040 Local representatives and service organisations worldwide
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