B&K 2250 Light Uživatelský manuál stáhnout pdf (Strana 46)

Hand-held Analyzer Types 2250 and 2270 – User Manual

4.2.3 Logging Software Module BZ-7224

This software module allows logging of broadband and spectral data

to obtain a time history

for later analysis, for example, for use in environmental noise as well as workplace noise

assessment. It allows free selection of up to 10 parameters to log at periods from 1 s to 24 h.

Results are logged directly to the SD memory card (or CF card if using hardware

versions 1 – 3).

4.2.4 Enhanced Logging Software Module BZ-7225

This software module is optimised for long-term monitoring. It has the functionality of the

Logging and Frequency Analysis software, and in addition it can measure continuously, save

data in manageable portions (every 24 hours), make periodic reports (that is, every hour) and

measure L

and L

den

, etc.

4.2.5 Signal Recording Option BZ-7226

This option allows recording of the input signal (typically sound) in either 16-bit or 24-bit

resolution during measurement. The signal recording can be controlled manually or by using

an external trigger signal. The recording can also be triggered when a measured parameter

exceeds a preset level (BZ-7224 and BZ-7225 only). The recorded signal can be played back

and listened to using the supplied Earphones HT-0015. The signal is recorded directly to the

SD memory card (or CF card if using hardware versions 1 – 3).

4.2.6 Reverberation Time Software BZ-7227

This software module allows measurement of reverberation time using Impulsive excitation

and backwards integration of the impulse, or using Interrupted Noise from the built-in noise

generator. Measurements can be made in a number of positions in the room and the average

reverberation time for the room is calculated.

4.2.7 2-channel Option BZ-7229 (Type 2270 only)

This option allows a number of software modules to measure two channels simultaneously:

• Sound Level Meter BZ-7222, Frequency Analysis BZ-7223, Logging BZ-7224, Enhanced

Logging BZ-7225 and Building Acoustics Software BZ-7228 modules

• Signal Recording Option BZ-7226 will be able to record in both channels of a two channel

measurement

*. Requires Frequency Analysis Software BZ-7223

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B&K 2250 Light Uživatelský manuál Strana 46