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Hand-held Analyzer Types 2250 and 2270 – User Manual

208

Software Specifications – Signal Recording Option BZ-7226

Signal Recording Option BZ-7226 is enabled with a

separate license. It works with all the software for

Type 2250/2270: Sound Level Meter, Frequency

Analysis, Logging Software, Enhanced Logging

Software and Reverberation Time Software

For data storage, Signal Recording requires:

• SD Card: All hardware versions

• CF Card: Hardware versions 1 – 3

• USB Memory Stick: Hardware version 4

RECORDED SIGNAL

A-, B-, C- or Z-weighted signal from the measurement

transducer

AUTOMATIC GAIN CONTROL

The average level of the signal is kept within a 40 dB

range, or the gain can be fixed

SAMPLING RATE AND PRE-RECORDING

The signal is buffered for the pre-recording of the

signal. This allows the beginning of events to be

recorded even if they are only detected later.

PLAYBACK

Playback of signal recordings can be listened to using

the earphone/headphones connected to the

headphone socket

RECORDING FORMAT

The recording format is either 24- or 16-bit wave files

(extension .WAV) attached to the data in the project,

easily played-back afterwards on a PC using BZ-5503,

Type 7820 or 7825. Calibration information is stored in

the .WAV file, allowing BZ-5503 and PULSE to analyse

the recordings

Functions with BZ-7222 and BZ-7223

Manual Control of Recording: Recording can be

manually started and stopped during a measurement

using a pushbutton or an external signal

Automatic Control of Recording: Start of recording

when measurement is started. Minimum and Maximum

recording time can be preset

Functions with BZ-7224 and BZ-7225

Manual Control of Recording (using Manual Event

or Back-erase pushbutton, or an external signal):

Recording during all of the event, or for preset

minimum and maximum duration. A Sound marker is

set while recording. Selectable pre- and post-recording

time

Manual Control of Recording (using touch screen):

Recording for the selected time period (subject to the

limitations of the pre-recording buffer). A Sound

marker is set for the selected time period

Automatic Control of Recording: An event can be

triggered when a broadband level is above or below a

specified level. Recording during all of the event or for

preset minimum and maximum duration. Selectable

pre- and post-recording time

Functions with BZ-7227

Automatic Control of Recording: Start of recording

when measurement is started

16-bit recording format only

Software Specifications – Reverberation Time Software BZ-7227

Standards

Conforms with the relevant parts of the following:

• IEC 61672 –1 (2013) Class 1

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

and Amendment 2 (2000–10), Type 1

• ANSI S1.4–1983 plus ANSI S1.4A–1985

Amendment, Type 1

• IEC 61260 (1995–07) plus Amendment 1 (2001–09),

1/1-octave Bands and 1/3-octave Bands, Class 0

• ANSI S1.11–1986, 1/1-octave Bands and 1/3-octave

Bands, Order 3, Type 0–C

• ANSI S1.11– 2004, 1/1-octave Bands and 1/3-

octave Bands, Class 0

•ISO140

• ISO 3382

•ISO354

Sampling

Rate

(kHz)

Maximum

Pre-recording (s)

16-bit

Maximum

Pre-recording (s)

24-bit

Memory

(KB/s)

16-bit

Memory

(KB/s)

24-bit

HW 1 – 3 HW G4 HW 1 – 3 HW G4

8110470 70 310 16 24

16 50 230 30 150 32 48

24 30 150 16 96 48 72

48 10 70 3 43 96 144

1 2 ... 215 216 217 218 219 220 221 222 223 224 225 ... 331 332

B&K 2250 Light Manual do Utilizador Página 220

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