B&K 2250 Light Manual de usuario descargar pdf (Pagina 216)

Hand-held Analyzer Types 2250 and 2270 – User Manual

204

SAMPLING FOR STATISTICS

The Statistics can be based on either L

, L

or L

Xeq

•Statistics L

XFN1-7

or L

XSN1-7

are based on sampling

or L

, resp., every 10 ms into 0.2 dB wide

classes over 130 dB

•Statistics L

XN1-7

are based on sampling L

Xeq

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

SLM: Measurement data displayed as numbers of

various sizes and one quasi-analog bar

Measured sound data are displayed as dB values,

vibration data as dB values or in physical units (SI

units (m/s2) or US/UK units (g)), direct data as voltage

in dB or V, housekeeping data as numbers in relevant

format.

Instantaneous measurement L

or Fast Inst 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

Auto-start: A total of 10 timers allow set up of

measurement start times up to a month in advance.

Each timer can be repeated. Measurements are

automatically stored when completed

BACK-ERASE

The last 5 s of data can be erased without resetting the

measurement

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

• Trig. Input Voltage below set value

• Internal Battery enters set state

• Change in Measurement State

• Reboot of analyzer

Signal Monitoring

The input signal can be monitored using an

earphone/headphones connected to the headphone

socket, or it can be fed to the output socket

OUTPUT SIGNAL

Input Conditioned: A-, B-, C- or Z-weighted

Gain Adjustment: –60 dB to 60 dB

output (every ms) as a DC voltage between 0 V

and 4 V

DC output for calibration purposes: 0 dB ~ 0 V and

200 dB ~ 4 V

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 measurements

so that verbal comments can be stored together with

the measurement

Playback: Playback of voice annotations can be

listened to using an earphone/headphones connected

to the headphone socket

Gain Adjustment: –60 dB to +60 dB

TEXT ANNOTATIONS

Text annotations can be attached to measurements so

that written comments can be stored with the

measurement

GPS ANNOTATIONS

A text annotation with GPS information can be

attached (Latitude, Longitude, Altitude and position

error). Requires connection to a GPS receiver

IMAGE ANNOTATIONS (TYPE 2270 ONLY)

Image annotations can be attached to measurements.

Images can be viewed on the screen.

Calibration

Initial calibration is stored for comparison with later

calibrations

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B&K 2250 Light Manual de usuario Pagina 216

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B&K 2250 Light Manual de usuario Pagina 216

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