B&K 2250 Light Bedienungsanleitung PDF herunterladen (Seite 219)

CHAPTER 18

Specifications

207

TRIGGERS

Markers can be set and signal recordings can be

started (license for BZ-7226 required) when a

broadband level is above or below a specified level

ANNOTATIONS

On-line annotations with spoken comments, written

notes or images (Type 2270 only)

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

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. 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.

X-axis: Scroll facilities

Cursor: Readout of measurement data at selected

time

Notifications

Alarm Conditions (in addition to those specified for

BZ-7222):

• CIC failed

• Trigger Level exceeded

Software Specifications – Enhanced Logging Software BZ-7225

The specifications for BZ-7225 include the specifi-

cations for Logging Software BZ-7224. BZ-7225 adds:

Logging

For Display and Storage

, L

den

, L

day

, L

evening

and L

night

Selectable Day, Evening and Night periods and

penalties (sound input only)

Periodic Reports: Measurement data logged at a

preset report period into files on:

• SD Card: All hardware versions

• CF Card: Hardware versions 1 – 3

• USB Memory Stick: Hardware version 4

Report Period: From 1 min to 24 hr with 1 min

resolution

Broadband Data and Statistics Stored at each

Reporting Interval: All including Weather data

Spectrum Data Stored at each Reporting Interval:

All (license for BZ-7223 required)

Spectral Statistics Stored at each Reporting

Interval: Full distribution, or none (sound input only,

license for BZ-7223 required)

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

or Continuous

Data are saved in separate projects for every 24 hr of

logging – at a user-defined time of day

Automatic reboot and resume of operation in case of

power failure

TRIGGERS

Signal Recording Timer

For periodically starting a signal recording (license for

BZ-7226 required)

Level Triggers

Markers can be set and signal recordings can be

started (license for BZ-7226 required) when a

broadband or frequency band level is above or below a

specified level. Hold off time between triggers can be

set. You can specify up to four independent Level

Triggers to be active at four different times during the

day

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. The CIC can be set to

occur up to 4 times in each 24 hour period

CIC Duration: 10 s

Notifications

Alarm Conditions (in addition to those specified for

BZ-7224): L

Aeq

for the latest Report Period exceeds a

set threshold

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B&K 2250 Light Bedienungsanleitung Seite 219

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