B&K 2250 Light Instrukcja Użytkownika Pobierz pdf (Strona 141)

CHAPTER 14

Specifications

133

Software Specifications – Logging Software for 2250 Light BZ-7133

The specifications for BZ-7133 include the specifica-

tions for Sound Level Meter Software for 2250 Light

BZ-7130. BZ-7133 adds:

Logging

MEASUREMENTS

Measurement data logged at pre-set periods into files

on:

• SD Card: All hardware versions

• CF Card: Hardware versions 1 – 3

• USB Memory Stick: Hardware version 4

Logging Period: From 1 s to 24 hr with 1 s resolution

Fast Logging: L

and L

Aeq

can be logged every

100 ms, irrespective of logging period

Broadband Data Stored at each Logging Interval:

All, or up to 10 selectable broadband data including

weather data and L

Aeq,T,mov

Broadband Statistics Stored at each Logging

Interval: Full distribution, or none

Spectrum Data Stored at each Logging Interval: All,

or up to three selectable spectra (license for BZ-7131

or BZ-7132 required)

Logging Time: From 1 s to 31 days with 1 s resolution

Measurement Total: For the logging time, in parallel

with logging: All broadband data, statistics and spectra

(license for BZ-7131 or BZ-7132 required)

Automatic reboot and resume of operation in case of

power failure

MEASUREMENT DISPLAYS

Profile: Graphical display of selectable measurement

data versus time. Fast display of next or previous

marker; Profile overview of entire measurement

Y-axis: Range: 5, 10, 20, 40, 60, 80, 100, 120, 140 or

160 dB. Auto zoom or auto scale available

X-axis: Scroll facilities

Cursor: Readout of measurement data at selected

time

MARKERS

Five user-definable markers for on-line marking of

noise sources or events anywhere in the profile.

Markers are set using the stylus on the touch screen,

or the three marker pushbuttons

Calibration

CHARGE INJECTION CALIBRATION (CIC)

Injects an internally generated electrical signal in

parallel with the microphone diaphragm. A manual CIC

can be performed whenever there is no measurement

in progress

An automatic CIC can be performed at the start and

end of a logging measurement

Storage

Measurement data is stored on an external memory

device.

For availability, please refer to the Ordering Infor-

mation

Notifications

ALARM CONDITIONS

CIC failed (in addition to those specified for BZ-7130)

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-L: Sound Level Meter, Frequency Analysis and

Logging 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

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