NL-27声级计（日本理音）的特点:
1、日本理音 (RION)公司生产的NL-27声级计， 该仪器重105 克 ,是世界上最小的噪音计。
2、符合计量法、JIS、IEC
3、有107dB宽的线线范围，在30—130dB的噪音声级之内，无须进行范围切换即可测定。
4、可测定噪音声级，等价噪音声级，噪音声级最大值，单发噪音暴露声级，峰值声压量程。
5、拥有手动存储功能，通过USB数据线（选配件）可将数据传输到计算机。
6、2节7号电池（碱性干电池）可工作7.5小时。 说明：噪音计的主体和前置放大器在结构上是一体的 因此不能使用麦克风延长线
NL-27声级计（日本理音）的技术指标：
| 适用规格(计量法普通噪音计) |
JIS C 1509-1;2005 2级 IEC 61672-1 CE标志(EMC指令2004/108/EC) WEE指令 |
| 测定功能 |
噪音级LP,等价噪音声级:Leq,单发噪音暴露声级LE 噪音声级最大值LMAX 峰值声压量程LCPEAK |
| 测定时间 | 1分钟\5分钟\10分钟\1小时 |
| 麦克风 |
1/2英寸驻极体电容式麦克风 型号;UC-52,感应量程:33dB |
| 测定级别范围 | A特性:30dB-130dB C特性:36dB-130dB |
| 直线工作范围 | 30dB-137dB |
| 固有噪音 | A特性:24dB以下 \ C特性:30dB以下 |
| 测定频率 | 20HZ-8KHZ |
|
标准频率 标准声压量程 |
标准频率:1KHZ 标准声压量程式:94dB |
| 时间加权特性 | F(fast) S(slow) |
| 级别范围 | 宽量程:30dB-130dB\峰值量程:65dB-130dB |
| 运算 | 数码模式采样周期:30.3US\LP\LEq\LE\LMAX\Lpeak |
| 校正 | 通过内置电子信号进行校正:可用NC-74 |
| 显示 |
数字显示:0.1dB分辨率 条形图:刻度范围100dB,分辨率5dB(显示周期0.1秒) |
| 储存 | 记录数据:199个 |
| 直流输出端子 | 直流输出,交流输出. |
| USB通讯接口 | 通过USB数据线(选购件)可连接电脑 |
| 电源 | 7号干电池2节,约7.5小时 |
| 使用温度 | -10-50度 |
| 重量 | 约105g 120mm(H) 63mm(W) 23.5(D) |
| 配件: | 防风罩\手提带\7号干电池2节 |
NL-27声级计（日本理音）的英文介绍：
Sound Level Meter NL-27
- Compliant with Japan Measurement Law, JIS, and IEC requirements
- Wide 107 dB linearity range allows sound level measurements from 30 to 130 dB without range
- Easy measurement of sound pressure level(Lp), equivalent continuous sound pressure level(Leq)
- Manual store function and capability to transfer data to a computer via optional USB adapter cable
- 9 houres operation on two size AAA (IEC R03) alkaline batteries
Specification
| Applicable Standard | General-Purpose Sound Level Meter according to Japan Measurement Law JIS C 1509-1:2005 Class 2, IEC 61672-1:2002 Class 2 CE mark (EMC Directive 2004/108/EC), WEEE |
| Measurement functions | Sound pressure level Lp, equivalent continuous sound pressurea level Leq, sound exposure level LE, maximum sound pressure level Lmac, peak sound level LCpeak (only when peak range was selected) |
| Measurement time | 1min, 5min, 10min, 1h |
| microphone | 1/2 inch electret condenser microphone UC-52 sensitivity Level: -33dB ± 3dB (re.1V/Pa) |
| Measurement range | A-weighting: 30dB to 130dB C-weighting: 36dB to 130dB |
| frequency range | 20Hz to 8kHz |
| Frequency weightng | A-weighting, C-weighting |
| Time weighting | F(Fast), S(Slow) |
| Windscreen | Unit is compliant with JIS C 1509-1 Class 2 and IEC 61672-1 Class 2 also when windscreen is mounted |
| Display | TN positive display, reflective Numeric display: 0.1dB resolution Bar graph: Scale range 100 dB resolution(update frequency 0.1s) Warning indecators: Over(Overload) appears at 137.4dB (1kHz), Under(Underload) appears from -0.6dB of lower scale limit Battery capacity 3-stage indicator for remaining capacity |
| Store function | processing results saved in internal memory, using manual store Number of data: 199 Stored data can be checked on recall screen |
| USB | For transfer of stored data to a computer, using optional USB adapter cable |
| power requirement | size AAA(IEC R03) battery X 2 Normal temperature Current consumption: approx. 80mA(3V operation) Battery life: approx. 9hours(with alkaline batteries), (Wide range) approx. 3hours(with manganese batteries) |
| Dimensions and weight | Approx. 120(H) X 63(W) X 23.5(D)mm, approx. 105g (including batteries) |
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