B&K 2250 Light Manual de usuario descargar pdf (Pagina 223)

CHAPTER 18

Specifications

211

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 analyzer

Signal Monitoring

Input signal A-, C- or Z-weighted 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

Annotations

VOICE ANNOTATIONS

Voice annotations can be attached to the

Reverberation Time Project, to Sources, to Receivers

and to measurements at each Position

Playback: Playback of voice annotations or signal

recordings can be listened to using

earphone/headphones connected to the headphone

socket

Gain Adjustment: –60dB to +60dB

TEXT & IMAGE ANNOTATIONS

Text and image (Type 2270 only) annotations can be

attached to the Reverberation Time Project, to

Sources, to Receivers and to measurements at each

Position

GPS ANNOTATIONS

A text annotation with GPS information can be

attached to the project (Latitude, Longitude, Altitude

and position error). Requires connection to a GPS

receiver

Data Management

Project Template: Defines the display and

measurement setups

Project: Measurement data for all positions defined in

a room are stored with the Project Template

Job: Projects are organised in Jobs

Explorer facilities for easy management of data (copy,

cut, paste, delete, rename, open project, create job,

set default project name)

For specifications and details on documenting results

in Qualifier Type 7830 and Qualifier Light Type 7831,

please refer to Product Data BP 1691

Software Specifications – 2-channel Option BZ-7229

2-channel Option BZ-7229 is enabled with a separate

license. It adds 2-channel functionality to Sound Level

Meter, Frequency Analysis, Logging, Enhanced

Logging and Building Acoustics Software and to Signal

recording option on Type 2270.

Note: 2-channel Enhanced Logging is not available for

hardware versions 1-3.

Please refer to Product Data BP 2190 for Dual-

channel Building Acoustics Software specifications

In general the 2-channel Option adds an extra channel

of measurement data. The two channels can have

input from same type of transducers (e.g., two

microphones) or two different transducers (e.g., one

microphone and one accelerometer)

SELF-GENERATED NOISE LEVEL

Typical values at 23°C for nominal microphone open-

circuit sensitivity:

High Range:

Low Range:

Weighting Microphone Electrical Total

“A” 14.6 dB 28.3 dB 28.5 dB

“B” 13.4 dB 26.9 dB 27.1 dB

“C” 13.5 dB 27.0 dB 27.2 dB

“Z” 5 Hz–20 kHz 15.3 dB 31.2 dB 31.3 dB

“Z” 3 Hz–20 kHz 15.3 dB 32.1 dB 32.2 dB

Weighting Microphone Electrical Total

“A” 14.6 dB 12.4 dB 16.6 dB

“B” 13.4 dB 11.5 dB 15.6 dB

“C” 13.5 dB 12.9 dB 16.2 dB

“Z” 5 Hz–20 kHz 15.3 dB 18.3 dB 20.1 dB

“Z” 3 Hz–20 kHz 15.3 dB 25.5 dB 25.9 dB

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