Atec Bruel-Kjaer-2250-2270 - Manual (Page 17)

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Software Specifications – Logging Software BZ-7224
The specifications for BZ-7224 include the specifications for Sound Level
Meter Software BZ-7222. BZ-7224 adds:
Logging
MEASUREMENTS
Logging: Measurement data logged at pre-set periods into files on:
• SD Card
• USB Memory Stick
Logging Period: From 1 s to 24 hr with 1 s resolution
Fast Logging: L
AF
, L
AS
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 incl. Trig. Input Voltage, and Weather data
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-7223 required)
Spectral Statistics Stored at each Logging Interval: Full distribution,
or none (license for BZ-7223 required)
Logging Time: From 1 s to 31 days using Preset Logging Time with 1 s
resolution
Measurement Total: For the logging time, in parallel with logging: All
broadband data, statistics and spectra (license for BZ-7223 required)
MARKERS
One data exclusion marker and four user-definable markers for on-line
marking of sound categories heard during the measurement
Events can be set manually
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
CIC (CHARGE INJECTION CALIBRATION)
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
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 specifications for Logging
Software BZ-7224. BZ-7225 adds:
Logging
For Display and Storage
L
dn
, L
den
, L
day
, L
evening
and L
night
Selectable Day, Evening and Night periods and penalties
Periodic Reports: Measurement data logged at a pre-set report period
into files on:
• SD Card
• USB Memory Stick
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 (license for BZ-7223 required)
Logging Time: From 1 s to 31 days with using Preset Logging with 1 s
resolution or Continuous
Data are saved in separate projects for every 24 hrs of logging – at a
user-defined time of day
Automatic reboot and resume of operation in case of power failure
TRIGGERS
Timer Trigger
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