B&K 2250 Light Uživatelský manuál stáhnout pdf (Strana 11)

For Display and Storage:

Weather Data (requires connection to a weather station):

Wind Dir. avg.

Wind Dir. min.

Wind Dir. max.

Wind Speed avg.

Wind Speed min.

Wind Speed max.

Amb. Temperature

Amb. Humidity

Amb. Pressure

Amb. Rain Gauge

Only for Display as Numbers or Quasi-analog Bars

Instantaneous Weather Data:

Wind Dir.

Wind Speed

Instantaneous GPS Data:

Latitude

Longitude

MEASURING RANGES

When using Microphone Type 4950

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:

23.6 dB to 122.3 dB

Linearity Range: In accordance with IEC 60804,

A-weighted: 21.5dB to 140.8dB

Linear Operating Range: In accordance with IEC 61672, A-weighted

1 kHz: 24.9 dB to 139.8 dB

Peak C Range: In accordance with IEC 61672: 1 kHz, 43.0 dB to

142.8 dB

SAMPLING FOR BROADBAND STATISTICS

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

The Std.Dev. (Standard Deviation) parameter is calculated from the

Statistics

Measurement Display and Control

MEASUREMENT DISPLAYS

Measurement data displayed as numbers of various sizes and one quasi-

analog bar.

Measured data are displayed as dB values, housekeeping data as

numbers in relevant format.

Instantaneous measurement L

is displayed as a quasi-analog bar

MEASUREMENT CONTROL

Manual: Manually controlled single measurement

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

PREFERENCES

Date, Time and Number formats can be specified

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

NOTIFICATIONS

Sends an SMS or e-mail daily at a specified time or if an alarm condition

is fulfilled.

Alarm Conditions:

• Disk space below set value

• Internal battery enters set state

• Change in measurement state

• Reboot of instrument

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

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)

Vpeak

avUQ

TWA

DoseUQ% Proj. DoseUQ%

Aeq,T,mov,max

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

Std.Dev.

Aeq,T,mov

1 2 ... 6 7 8 9 10 11 12 13 14 15 16

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