Sound and Vibration Instrument Hire and Calibration
Bruel & Kjaer 2250 Sound Level Meter Specifications
This is the main B&K 2250 Specifications page.
To see the specifications for the various options available, click a link
BZ 7222 : Sound Analysis Software
BZ 7223 : Frequency Analysis Software
BZ 7224 : Logging Software
BZ 7225 : Enhanced Logging Option
BZ 7226 : Sound Recording Software
BZ 7227 : Reverberation Time Option
BZ 7228 : Sound Insulation Option
BZ 7230 : FFT Analysis Option
BZ 7231 : Tone Assessment Option
B&K 2250 : Home Page
B&K 2250 : Detailed Image
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)
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
Selectable between 0 V and 200 V
Typical values at 23 °C for nominal microphone open-circuit sensitivity:
Push buttons: 11 keys with back light, optimised for measurement control and screen navigation
Function: press 1 s to turn on; press 1 s to enter standby; press for more than 5 s to switch off
Leeds: red, amber and green
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
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 1.1 OTG Mini B socket
Hayes compatible GSM or standard analogue modems connected through the Compact Flash slot
For connecting CF memory card, CF modem, CF LAN Interface or CF WLAN Interface
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
Connector: Triaxial LEMO
Max Input Voltage: ± 20 Vpeak
Input Impedance: > 1 MΩ
Connector: Triaxial LEMO
Max Peak Output Level: ± 4.46 V
Output Impedance: 50 Ω
Connector: 3.5 mm Mini-jack stereo socket
Max Peak Output Level: ± 1.4 V
Output Impedance: 2.2 Ω in each channel
Microphone, which utilises Automatic Gain Control (AGC), is incorporated in underside of instrument.
Used to create voice annotations for attaching to measurements
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
Type: Li-Ion rechargeable
Typical Operating Time: > 8 hours
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
Back-up battery powered clock. Drift < 0.5 s per 24 hour period
From Power Off: < 2 minutes s
From Standby: < 10 seconds for pre polarized microphones
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)
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)
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
650 g (23 oz) including rechargeable battery
300 x 93 x 50 mm (11.8 x 3.7 x 1.9 ")
E&OE - specifications subject to change without notice.
* Our standard hire charges are based on a 4-day minimum period, details other options.
BZ 7223 : Frequency Analysis Software
BZ 7224 : Logging Software
BZ 7225 : Enhanced Logging Option
BZ 7226 : Sound Recording Software
BZ 7227 : Reverberation Time Option
BZ 7228 : Sound Insulation Option
BZ 7230 : FFT Analysis Option
BZ 7231 : Tone Assessment Option
B&K 2250 : Detailed Image
| Bruel & Kjaer 2250 : Multi-function Sound Level Analyser | £ 25 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 Polarisation 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 ")
* Our standard hire charges are based on a 4-day minimum period, details other options.
