1、概述

  声级计是一种与人耳大致相同的方式响应声音的仪器。使用声级计的目的是对声压级进行客观、可重复的测量。
  声级计和噪音计通常用于描述同一种仪器。在谈到声级计时，主要区别在于精度的分类（由国际标准定义）。当然，所有的Bruel&Kjaer的声级计都符合最高的国家标准和国际标准。

2、如何使用声级计
B&K的声级计可用于各种行业和应用，例如：
优化建筑物的声学和振动
声功率和噪声源识别
产品噪声识别
工作噪声评估和OHS评估
当地和国家环境噪声及振动合规性

3、基本参数

4：详细说明

Measuring Ranges :

Note * : Level non-linearity caused by noise floor is < 0.4 dB at 30 dBA, re IEC 651 and < 1 dB at 26 dBA
Note 1 : with crest factor = 10 or 20 dB

Noise Floor : 
Typically 18 dBA
Maximum : 20 dBA RMS
Includes preamplifier's electrical noise and microphone's thermal noise

Detectors : simultaneous RMS and Peak with independent frequency weightings
Linearity Range : 80 dB
Pulse Range :  83 dB
Non-linear Distortion : too small to affect accuracy
Peak Detector Rise Time : < 50 ms

Frequency Weightings : selected independently for RMS and Peak
RMS A and C : according to IEC 651 Type 1
RMS L : flat from 10 Hz to 20 kHz ± 2 dB with Type 1 tolerances
Peak C : according to IEC 651 Type 1
Peak L : flat from 10 Hz to 20 kHz ± 2 dB with Type 1 tolerances

Time Weightings : Fast, Slow, Impulse, according to IEC 651 Type 1

Display : 4 line LCD showing:
Measuring range and quasi-analogue bar showing input signal
Battery low, pause and overload with hold indicators
Time weighting and elapsed measurement time
Optional back light
The quasi-analogue bar is updated 15 times per second
Displayed parameter level updated once per second

Parameters : 
MaxL,  MinL,  MaxP,  Peak,  SPL,  Leq,  SEL,  LEP,d and Overload in % of measurement time + variable Ln, default values L90,  L50 and  L10

Exchange Rate : 3

Resolution : 
LN Values : 0.5 dB
Other Parameters : 0.1 dB

Reset : 
Resets Buffer including elapsed time to zero. Warning prior to reset if elapsed time > 1 min.
Reset when changing frequency or time weighting
Resets all results in Log, Memory and Buffer if held down together with (Data)
Optional reset when changing level of measurement range, Lns not available if range change is without reset

Microphone : Type 4188 pre polarized free-field 1/2" condenser microphone 
Sensitivity : -30 dB re 1 V/Pa ± 2 dB
Frequency Range : 8 Hz to 12.5 kHz ± 2 dB
Capacitance : 12 pF

Memory : 40 Records of Overall Results
Result Logging : Leq : L10 and L90
Log Rate : 1 s : 10 s : 30 s : 1 m : 5 m : 10 m : 15 m : 30 m and 60 m.
Memory Capacity : 512 Kbytes, equivalent to 86400 sets of results (for example, 24 hours of 1 s logging)

Serial Interface : Compatible with EIA-574
Baud Rate : 1200 - 19200 
Data Bits : 8
Stop Bit : 1
Parity : none
Handshake : Hardwired, XON / XOFF or None

Results Output Format : 
Overall : Logged 2318 printer : Logged spreadsheet : Level Distribution : Cumulative Distribution : Distribution resolution 1 to 5 dB

Heading : long or short 

DC Output : Short circuit protected coaxial Lemo socket (series 00)
Output : 50 mV/dB equivalent to 0 - 4.15 V
Output Resistance : 100 Ω
Output Parameter : same as the Displayed Parameter

AC Output : Short circuit protected coaxial Lemo socket (series 00)
Maximum Output : 0.5 V RMS corresponding to the top of the selected measurement range ± 2 dB depending on the microphone's sensitivity
Output Resistance : 100 Ω
Output : output signal from preamplifier (L frequency weighting)

Clock : real time, calendar and measurement duration

Warm up Time : < 5 s

Settling Time : at range change without reset: < 4 ms

Calibration Conditions :
Reference Frequency : 1000 Hz
Reference SPL : 94 dB
Reference Range : 50 - 130 dB, set automatically during calibration sequence
Reference Incidence : Frontal

Environmental :
Storage Temperature : -25 to +70 ° C
Operating Temperature : -10 to +50 °C
Effect of Temperature : < 0.5 dB, -10 to +50 °C
Effect of **midity : < 0.5 dB for 30 %RH at 40 °C and 1 kHz
Vibration Sensitivity : < 80 dB with L-weighting at 1 m/s^-2
Magnetic Field : 80 A/m, 1?rsted at 50 Hz gives < 34 dBL

Power Supply - Internal : 
Batteries :   4 x 1.5 V LR6 / AA size alkaline cells
Battery Life : > 12 hours, typically
Back up battery : keeps clock and memories operating for at least 6 months, if fully charged

External Power Supply:
Voltage : 7 - 15 V DC regulated
Voltage Ripple : < 100 mV peak to peak
Maximum Current : 400 mA
Average Current : 100 mA at 7 V

External Power Supply Socket : 
Socket Pin: Positive
Socket Casing : Signal Ground
Socket Pin Diameter : 2.0 mm
Socket External Diameter : 5.5 mm

Dimensions and Weight :
Size : 257 mm x 97 mm x 41 mm
Weight : 460 g including batteries

深圳市声仪科技有限公司为您提供丹麦BK Type2236 声级计/音压计的详细产品价格、产品图片等产品介绍信息，您可以直接联系我们获取丹麦BK Type2236 声级计/音压计的具体资料，联系时请说明是在中科看到的。

联系人：13632801151  陆先生