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Bruel & Kjaer 2250 Specifications

To see the specifications for the various options available, click a link

BZ 7222 - Sound Analysis Software Specifications BZ 7223 - Frequency Analysis Software Specifications BZ 7224 - Logging Software Specifications BZ 7225 - Enhanced Logging Option Specifications BZ 7226 - Sound Recording Software Specifications BZ 7227 - Reverberation Time Option Specifications BZ 7228 - Sound Insulation Option Specifications BZ 7230 - FFT Analysis Option Specifications BZ 7231 - Tonal Assessment Option Specifications

B&K 2250 - Main Page B&K 2250 - Specifications

This is the main 2250 specifications page.

B&K 2250 :  with the BZ 7222, BZ 7223, BZ 7224 and BZ 7226 software built-in

£ 24 a day *

SPECIFICATIONS : 2250 PLATFORM

All our 2250 meters fitted with the supplied microphone and preamplifier and with the instrument at + 20 °C unless otherwise stated

SUPPLIED MICROPHONE
Type 4189: pre-polarized Free-field 1/2" Microphone
Nominal sensitivity: 50 mV/Pa (corresponding to -26 dB re 1 V/Pa) ± 1.5 dB
Capacitance: 14 pF (at 250 Hz)

MICROPHONE PREAMPLIFIER: ZC 0032
Nominal Preamplifier Attenuation: 0.25 dB
Connector: 10-pin Lemo
Extension Cables: up to 100 m in length between the microphone preamplifier and Type 2250, without degradation of the specifications

MICROPHONE POLARIZATION VOLTAGE
Selectable between 0 V and 200 V

SELF-GENERATED NOISE LEVEL
Typical values at 23 °C for nominal microphone open-circuit sensitivity:

Weighting	Microphone	Electrical	Total
A	14.6 dB	12.4 dB	16.6 dB
C	13.4 dB	12.9 dB	16.2 dB
Z   5 Hz - 20 kHz	15.3 dB	18.3 dB	20.1 dB
Z   3 Hz - 20 kHz	15.3 dB	25.5 dB	25.9 dB

KEYBOARD
Push buttons: 11 keys with back light, optimised for measurement control and screen navigation

ON-OFF BUTTON
Function: press 1 s to turn on; press 1 s to enter standby; press for more than 5 s to switch off

STATUS INDICATORS
Leeds: red, amber and green

DISPLAY
Type: transflective back-lit colour touch screen 240 x 320 dot matrix
Colour Schemes: five - optimised for different usage scenarios (day, night, etc.)
Back light: adjustable level and on-time

USER INTERFACE
Measurement Control: using push buttons on keyboard
Setup and Display of Results: using stylus on touch screen or push buttons on keyboard
Lock: keyboard and touch screen can be locked and unlocked

USB INTERFACE
USB 1.1 OTG Mini B socket

MODEM INTERFACE
Hayes compatible GSM or standard analogue modems connected through the Compact Flash slot

COMPACT FLASH SOCKET
For connecting CF memory card, CF modem, CF LAN Interface or CF WLAN Interface

INPUT SOCKET
Connector: tri-axial LEMO
Input Impedance: ≥ 1 MΩ
Signal Source Impedance < 200 Ω
Direct Input: Max input voltage: ± 14.14 Vpeak,
CCLD Input: Max input voltage: ± 7.07 Vpeak
CCLD Current/Voltage: 4mA/25 V
Note: CCLD = Constant Current Line Drive

TRIGGER SOCKET
Connector: Triaxial LEMO
Max Input Voltage: ± 20 Vpeak
Input Impedance: > 1 MΩ

OUTPUT SOCKET
Connector: Triaxial LEMO
Max Peak Output Level: ± 4.46 V
Output Impedance: 50 Ω

HEADPHONE SOCKET
Connector: 3.5 mm Mini-jack stereo socket
Max Peak Output Level: ± 1.4 V
Output Impedance: 2.2 Ω in each channel

MICROPHONE FOR COMMENTARY
Microphone, which utilises Automatic Gain Control (AGC), is incorporated in underside of instrument. Used to create voice annotations for attaching to measurements

EXTERNAL DC POWER SUPPLY REQUIREMENTS
Used to charge the battery pack in the instrument
Voltage: : 8 - 24 V DC, ripple voltage < 20 mV
Current Requirement: min. 1.5 A
Power Consumption: < 2.5 W, without battery 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 s
From Standby: < 10 seconds for pre polarized microphones

TEMPERATURE
IEC 60068-2-1 & IEC 60068-2-2: Environmental Testing. Cold and Dry Heat.
Operating Temperature: < 0.5 dB, -10 to + 50 °C (14 to 122 °F)
Storage Temperature: -25 to +70 °C (-13 to 158 °F)

HUMIDITY
IEC 60068-2-3: Damp Heat: 90 % RH (non-condensing at 40 °C (104 °F)).
Effect of Humidity: < 0.5 dB for 30 % < RH < 90 % (at 40 °C (104 °F) and 1 kHz)

MECHANICAL
Environmental Protection: IP44
Non-operating:
IEC 60068-2-6: Vibration: 0.3 mm, 20 m/s2, 10-500 Hz
IEC 60068-2-27: Shock: 1000 m/s2
IEC 60068-2-29: Bump: 1000 bumps at 250 m/s2

WEIGHT AND DIMENSIONS
650 g (23 oz) including rechargeable battery
300 x 93 x 50 mm (11.8 x 3.7 x 1.9 ")

HELP
Concise context sensitive help in English

E&OE - specifications subject to change without notice.

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