B&K 2250 Light Uživatelský manuál stáhnout pdf (Strana 13)

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

, 10 – 500 Hz

IEC 60068–2–27: Shock: 1000 m/s

IEC 60068–2–29: Bump: 4000 bumps at 400 m/s

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, Romanian,

Serbian, Slovenian, Spanish and Swedish

HELP

Concise context-sensitive help in Catalan, English, French, German,

Italian, Polish, 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 1997) plus ANSI S1.4A–1985 Amendment,

Type 1

• ANSI S1.43–1997 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 microphones of known types, BZ 7222 is able to correct the

frequency response to compensate for:

Sound Field: Free-field or Diffuse-field

Accessories: None, Windscreen UA 1650 or Outdoor Microphone

Kit UA 1404

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

N = number between 0.1 and 99.9

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

or L

Aeq

•Statistics L

AFN1-7

are based on sampling L

every 10 ms into

0.2 dB wide classes over 120 dB

•Statistics L

AN1-7

are based on sampling L

Aeq

every second into

0.2 dB wide classes over 120 dB

Full distribution saved with measurement

MEASUREMENT DISPLAYS

SLM: Measurement data displayed as numbers of various sizes and

one quasi-analogue bar

Measured data are displayed as dB values, housekeeping data as

numbers in relevant format.

Instantaneous measurement L

is displayed as a quasi-analogue

bar

Start Time Stop Time Overload %

Elapsed Time L

Aeq

Xeq

-L

Aeq

Vpeak

ASmax

AFmax

AImax

XSmax

XFmax

XImax

ASmin

AFmin

AImin

XSmin

XFmin

XImin

AIeq

XIeq

AIeq

-L

Aeq

AFTeq

-L

Aeq

AN1

or L

AFN1

AN2

or L

AFN2

AN3

or L

AFN3

AN4

or L

AFN4

AN5

or L

AFN5

AN6

or L

AFN6

AN7

or L

AFN7

Time Remaining

AS(SPL)

AF(SPL)

AI(SPL)

XS(SPL)

XF(SPL)

XI(SPL)

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

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