13
Voltage: 8 – 24 V DC, ripple voltage < 20 mV
Current Requirement: min. 1.5 A
Power Consumption: < 2.5 W, without battery charging, < 10 W
when charging
Cable Connector: LEMO Type FFA.00, positive at centre pin
BATTERY PACK
Type: Li-Ion rechargeable
Typical Operating Time: > 8 hours
STORAGE SYSTEM
Internal Flash-RAM (non-volatile): 20 Mbyte for user setups and
measurement data
External Secure Digital Memory Card (SD-card): For store/recall
of measurement data
External Compact Flash Memory Card (CF-card): For store/recall
of measurement data
CLOCK
Back-up battery powered clock. Drift <0.5 s per 24 hour period
WARM-UP TIME
From Power Off: < 2 minutes
From Standby: < 10 seconds for prepolarized microphones
TEMPERATURE
IEC 60068–2–1 & IEC 60068–2–2: Environmental Testing. Cold and
Dry Heat.
Operating Temperature: –10 to + 50°C (14 to 122°F), < 0.1 dB
Storage Temperature: –25 to +70°C (–13 to +158°F)
HUMIDITY
IEC 60068–2–78: Damp Heat: 90% RH (non-condensing at 40°C
(104°F)).
Effect of Humidity: < 0.1 dB for 0% < RH < 90% (at 40°C (104°F)
and 1 kHz)
MECHANICAL
Environmental Protection: IP44
Non-operating:
IEC 60068–2–6: Vibration: 0.3mm, 20 m/s
2
, 10 – 500 Hz
IEC 60068–2–27: Shock: 1000 m/s
2
IEC 60068–2–29: Bump: 4000 bumps at 400 m/s
2
WEIGHT AND DIMENSIONS
650 g (23 oz.) including rechargeable battery
300 × 93 × 50 mm (11.8 × 3.7 × 1.9
″) including preamplifier and
microphone
LANGUAGE
User Interface in Catalan, Croatian, Czech, Danish, English, Flemish,
French, German, Hungarian, Japanese, Italian, Polish, Portuguese,
Romanian, Serbian, Slovenian, Spanish and Swedish
HELP
Concise context-sensitive help in Catalan, English, French, German,
Italian, Japanese, Polish, Portuguese, Romanian, Serbian, Slovenian
and Spanish
Software Specifications – 2250 Sound Level Meter Software BZ 7222
Conforms with the following National and International Standards:
• IEC 61672 –1 (2002–05) Class 1
• IEC 60651 (1979) plus Amendment 1 (1993–02) and Amendment
2 (2000–10), Type 1
• IEC 60804 (2000–10 ), Type 1
• DIN 45657 (1997–07)
• ANSI S1.4–1983 (R 2001), Type 1
• ANSI S1.43–1997 (R 2002), Type 1
Note: The International IEC Standards are adopted as European
standards by CENELEC. When this happens, the letters IEC are
replaced with EN and the number is retained. Type 2250 also
conforms to these EN Standards
TRANSDUCERS
Transducers are described in a transducer database with information
on Serial Number, Nominal Sensitivity, Polarization Voltage, Free-
field Type, CCLD required, Capacitance and additional information.
The analogue hardware is set up automatically in accordance with
the selected transducer
CORRECTION FILTERS
For microphone Types 4189, 4191, 4193 and 4952, BZ 7222 is able
to correct the frequency response to compensate for sound field and
accessories:
Sound Field: Free-field or Diffuse-field (for Type 4952 only: 0°
reference direction and 90° reference direction)
Accessories (Type 4189 only): None, Windscreen UA 1650 or
Outdoor Microphone Kit UA 1404
Accessories (Types 4191 and 4193 only): None or Windscreen
UA 1650
DETECTORS
Parallel Detectors on every measurement:
A-weighted broadband detector channel with three exponential time
weightings (Fast, Slow, Impulse), one linearly averaging detector and
one peak detector
C- or Z-weighted (switchable) as for A-weighted
Overload Detector: Monitors the overload outputs of all the
frequency weighted channels
MEASUREMENTS
X = frequency weightings C or Z
V = frequency weightings A, C or Z
Y = time weightings F or S
N = number between 0.1 and 99.9
For Storage
Full statistics
For Display and Storage
Only for Display as Numbers or Quasi-analogue Bars
MEASURING RANGES
Dynamic Range: From typical noise floor to max. level for a 1 kHz
pure tone signal, A-weighted: 16.7 to 140 dB
Linearity Range: In accordance with IEC 60804,
A-weighted, 1 kHz: 22.9 dB to 140 dB
Linear Operating Range: In accordance with IEC 61672,
A-weighted, 1 kHz: 26.3 dB to 140 dB
Peak C Range: In accordance with IEC 61672: 30.4 dB to 143 dB
SAMPLING FOR STATISTICS
The Statistics can be based on either L
AF
, L
AS
or L
Aeq
:
•Statistics L
AFN1-7
or L
ASN1-7
are based on sampling L
AF
or L
AS
,
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
MEASUREMENT DISPLAYS
SLM: Measurement data displayed as numbers of various sizes and
one quasi-analogue bar
Start Time Stop Time Overload %
Elapsed Time L
Aeq
L
Xeq
L
AE
L
Xeq
-L
Aeq
L
Vpeak
L
ASmax
L
AFmax
L
AImax
L
XSmax
L
XFmax
L
XImax
L
ASmin
L
AFmin
L
AImin
L
XSmin
L
XFmin
L
XImin
L
AIeq
L
XIeq
L
AIeq
-L
Aeq
L
AFTeq
L
AFTeq
-L
Aeq
Time Remaining
L
AS
L
AF
L
AI
L
XS
L
XF
L
XI
L
AS(SPL)
L
AF(SPL)
L
AI(SPL)
L
XS(SPL)
L
XF(SPL)
L
XI(SPL)
L
AN1
or L
AYN1
L
AN2
or L
AYN2
L
AN3
or L
AYN3
L
AN4
or L
AYN4
L
AN5
or L
AYN5
L
AN6
or L
AYN6
L
AN7
or L
AYN7
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