B&K 2250 Light Instrukcja Użytkownika Pobierz pdf (Strona 10)

Software Specifications – Sound Level Meter Software for 2250 Light BZ-7130

Conforms with the following National and International Standards:

• IEC 61672 –1 (2002–05) Class 1

• IEC 60651 (1979) plus Amendment 1 (1993–02) and Amendment

2 (2000–10), Type 1

• IEC 60804 (2000–10 ), Type 1

• IEC 61252, Electroacoustics – Specifications for Personal Sound

Exposure Meters

• DIN 45657 (1997–07)

• ANSI S1.4–1983 plus ANSI S1.4A–1985 Amendment, Type 1

• ANSI S1.43–1997, Type 1

Note: The International IEC Standards are adopted as European

standards by CENELEC. When this happens, the letters IEC are

replaced with EN and the number is retained. 2250 Light also

conforms to these EN Standards

CORRECTION FILTERS

For Microphone Type 4950:

Correct the frequency response to compensate for sound field and

accessories:

Sound Field: Free-field or Diffuse-field

Accessories: None, Windscreen UA-0237

DETECTORS

Parallel Detectors on every measurement:

A- or B-weighted (switchable) broadband detector channel with

three exponential time weightings (Fast, Slow, Impulse), one linearly

averaging detector and one peak detector

C- or Z-weighted (switchable) as for A- or B-weighted

Overload Detector: Monitors the overload outputs of all the

frequency weighted channels

MEASUREMENTS

X = frequency weightings A or B

Y = frequency weightings C or Z

V = frequency weightings A, B, C or Z

U = time weightings F or S

Q = exchange rate 4, 5 or 6 dB

N = number between 0.1 and 99.9

For Storage

Full statistics

For Display and Storage

Only for Display as Numbers or Quasi-analogue Bars

MEASURING RANGES

Dynamic Range: From typical noise floor to max. level for a 1 kHz

pure tone signal, A-weighted: 16.4 to 140 dB

Primary Indicator Range: In accordance with IEC 60651,

A-weighted: 23.9 dB to 123 dB

Linearity Range: In accordance with IEC 60804,

A-weighted: 21.8 dB to 140 dB

Linear Operating Range: In accordance with IEC 61672,

A-weighted: 1 kHz: 25.0 dB to 140 dB

Peak C Range: In accordance with IEC 61672: 43.0 dB to 143 dB

SAMPLING FOR BROADBAND STATISTICS

The Statistics can be based on either L

, L

or L

Aeq

•Statistics L

AFN1-7

or L

ASN1-7

are based on sampling L

or L

resp., every 10 ms into 0.2 dB wide classes over 130 dB

•Statistics L

AN1-7

are based on sampling L

Aeq

every second into

0.2 dB wide classes over 130 dB

Full distribution saved with measurement

MEASUREMENT DISPLAYS

SLM: Measurement data displayed as numbers of various sizes and

one quasi-analogue bar

Measured data are displayed as dB values, housekeeping data as

numbers in relevant format.

Instantaneous measurement L

is displayed as a quasi-analogue bar

MEASUREMENT CONTROL

Manual: Manually controlled single measurement

Automatic: Pre-set measurement time from 1 s to 24 hours in 1 s

steps

Manual Controls: Reset, Start, Pause, Back-erase, Continue and

Store the measurement manually

BACK-ERASE

The last 5 s of data can be erased without resetting the measurement

MEASUREMENT STATUS

On Screen: Information such as overload and running/paused are

displayed on screen as icons

Traffic Lights: Red, yellow and green LEDs show measurement

status and instantaneous overload as follows:

• Yellow LED flash every 5 s = stopped, ready to measure

• Green LED flashing slowly = awaiting calibration signal

• Green LED on constantly = measuring

• Yellow LED flashing slowly = paused, measurement not stored

• Red LED flashing quickly = intermittent overload, calibration failed

CALIBRATION

Initial calibration is stored for comparison with later calibrations

Acoustic: Using Sound Calibrator Type 4231 or custom calibrator.

The calibration process automatically detects the calibration level

when Sound Calibrator Type 4231 is used

Electrical: Uses internally generated electrical signal combined with

a typed-in value of microphone sensitivity

Calibration History: Up to 20 of the last calibrations made are listed

and can be viewed on the instrument

SIGNAL MONITORING

The input signal can be monitored using an earphone/headphones

connected to the headphone socket

Headphone Signal: Input signal can be monitored using this socket

with headphones/earphones

Gain Adjustment: –60 dB to 60 dB

DATA MANAGEMENT

Project Template: Defines the display and measurement setups

Project: Measurement data stored with the Project Template

Job: Projects are organised in Jobs

Explorer facilities for easy management of data (copy, cut, paste,

delete, rename, view data, open project, create job, set default project

name)

PREFERENCES

Date, Time and Number formats can be specified

Start Time Stop Time Overload %

Elapsed Time L

Xeq

Yeq

Ceq

-L

Aeq

XSmax

XFmax

XImax

YSmax

YFmax

YImax

XSmin

XFmin

XImin

YSmin

YFmin

YImin

XIeq

YIeq

AIeq

-L

Aeq

AFTeq

-L

Aeq

Time Remaining

ep,d

ep,d,v

Dose% Proj. Dose% #VPeaks (>NNNdB)

#VPeaks (>137dB) #VPeaks (>135dB) L

Vpeak

avUQ

TWA

DoseUQ% Proj. DoseUQ%

XS(SPL)

XF(SPL)

XI(SPL)

YS(SPL)

YF(SPL)

YI(SPL)

Vpeak,1s

AN1

or L

AUN1

AN2

or L

AUN2

AN3

or L

AUN3

AN4

or L

AUN4

AN5

or L

AUN5

AN6

or L

AUN6

AN7

or L

AUN7

1 2 ... 5 6 7 8 9 10 11 12

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