B&K 2250 Light Uživatelský manuál stáhnout pdf (Strana 9)

Specifications – 2250 Light Platform

Specifications apply to 2250 Light fitted with Microphone Type 4950

and Microphone Preamplifier ZC-0032

SUPPLIED MICROPHONE

Type 4950: Prepolarized Free-field ½

 Microphone

Nominal Open-circuit Sensitivity: 50 mV/Pa (corresponding to

26 dB re 1 V/Pa) ± 2 dB

Capacitance: 12.5 pF (at 250 Hz)

MICROPHONE PREAMPLIFIER ZC-0032

Nominal Preamplifier Attenuation: 0.3 dB

Connector: 10-pin LEMO

Extension Cables: Up to 100 m in length between the microphone

preamplifier and 2250 Light, without degradation of the specifications

SELF-GENERATED NOISE LEVEL

Typical values at 23°C for nominal microphone open-circuit

sensitivity:

KEYBOARD

Pushbuttons: 11 keys with backlight, 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

LEDs: Red, amber and green

DISPLAY

Type: Transflective back-lit touch screen 240  320 dot matrix

Black and White Scheme

Backlight: Adjustable level and on-time

USER INTERFACE

Measurement Control: Using pushbuttons on keyboard

Setup and Display of Results: Using stylus on touch screen or

pushbuttons 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

HEADPHONE SOCKET

Connector: 3.5 mm Minijack stereo socket

Max. Peak Output Level: ±1.4V

Output Impedance: 32 in each channel

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: < 2.5W, 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 < 0.45 s per 24 hour period

WARM-UP TIME

From Power Off: < 2 minutes

From Standby: < 10 seconds

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: IP 44

Non-operating:

IEC 60068–2–6: Vibration: 0.3 mm, 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, Portuguese,

Romanian, Serbian, Slovenian, Spanish, Swedish and Turkish

HELP

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

Italian, Japanese, Polish, Portuguese, Romanian, Serbian, Slovenian

and Spanish

Weighting Microphone Electrical Total

“A” 14.0 dB 12.9 dB 16.4dB

“B” 12.9 dB 11.8 dB 15.4dB

“C” 13.0 dB 13.4 dB 16.2dB

“Z” 5 Hz–20 kHz 14.4 dB 19.2 dB 20.4dB

Compliance with Standards

CE-mark indicates compliance with the EMC Directive and Low Voltage Directive.

C-Tick mark indicates compliance with the EMC requirements of Australia and New Zealand.

Safety EN/IEC 61010–1: Safety requirements for electrical equipment for measurement, control and laboratory use.

UL 61010B–1: Standard for Safety – Electrical measuring and test equipment.

EMC Emission EN/IEC 61000–6–3: Generic emission standard for residential, commercial and light industrial environments.

CISPR 22: Radio disturbance characteristics of information technology equipment. Class B Limits.

FCC Rules, Part 15: Complies with the limits for a Class B digital device.

IEC 61672–1, IEC 61260, IEC 60651 and IEC 60804: Instrumentation standards

EMC Immunity EN/IEC 61000–6–2: Generic standard – Immunity for industrial environments.

EN/IEC 61326: Electrical equipment for measurement, control and laboratory use – EMC requirements.

IEC 61672–1, IEC 61260, IEC 60651 and IEC 60804: Instrumentation standards

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