VA-11B动平衡及振动分析仪是由日本理音（RION）公司生产的一款高性能设备。该仪器重量仅5千克，便于携带和操作。它能够同时测量振动的加速度、速度及位移值。当机器出现异常时，VA-11B可以进行时域分析、FFT频率分析和包络分析，从而找出故障原因或部位，甚至还能分析故障的严重程度。此外，如果机器振动过大是由于不平衡造成的，该仪器还能进行现场动平衡操作，通过加配重使机器质量均匀，达到平衡状态。它适用于多种机器类型，包括压缩机、水轮机、离心机、风机和水泵等。

VA-11B动平衡及振动分析仪功能强大，显示器大而亮，功耗低。它还可以作为数据采集器使用，能够存储500组测试数据。其配套软件具备多种功能，如建立档案、数据通讯、时域分析、频谱分析、趋势分析、打印报表和状态判断等。该仪器的技术指标十分出色，振动探头为加速度探头PV-87（可选购PV-57带磁座），测量方式包括加速度、加速度包络、速度和位移。量程范围广泛，加速度为1、3.16、10、31.6、100、316m/s² RMS，速度为3.16、10、31.6、100、316、1000mm/s RMS，位移为0.089、0.283、0.894、2.83、8.94、28.3mm EQ P-P。测量频率范围分别为加速度3Hz～20kHz、速度3Hz～3kHz、位移3Hz～500Hz。其A/D转换器为16位，采样频率为51.2kHz。显示屏为77.5×54mm的LCD，分辨率为192×128点，且带有背光功能。内存可存储500组测量数据，接口为RS-232C。环境条件要求为0～40℃，20～90％RH。电源为4节2号电池，连续操作时间可达22小时，也可使用4～6V的外部电源。尺寸为18.8(H)×15.6(W)×4.6(D)cm。

标准配置包括VA-11B振动分析仪主机（含电池、背带、皮套）、平衡单元VA-11W、振动探头PV-87（可选购PV-57带磁座）、转速探头FS-11、AC适配器NC-94、通讯电缆线以及中英文说明书和配套软件。

The VA-11B Dynamic Balancing and Vibration Analyzer is a high-performance device produced by RION, a Japanese company. Weighing only 5 kilograms, it is easy to carry and operate. The instrument can simultaneously measure acceleration, velocity, and displacement of vibrations. When a machine malfunctions, the VA-11B can conduct time-domain analysis, FFT frequency analysis, and envelope analysis to identify the causes or locations of the faults and even assess the severity of the problems. Moreover, if excessive vibration is caused by imbalance, the instrument can perform on-site dynamic balancing by adding counterweights to achieve a balanced state. It is suitable for various types of machinery, including compressors, turbines, centrifuges, fans, and pumps.

The VA-11B Dynamic Balancing and Vibration Analyzer is powerful, with a large and bright display and low power consumption. It can also be used as a data collector, capable of storing 500 sets of test data. Its accompanying software features multiple functions, such as creating files, data communication, time-domain analysis, spectral analysis, trend analysis, printing reports, and status judgment. The technical specifications of the instrument are impressive. It is equipped with an acceleration probe PV-87 (PV-57 with a magnetic base is also available for selection), and the measurement methods include acceleration, acceleration envelope, velocity, and displacement. The measurement ranges are extensive: acceleration from 1, 3.16, 10, 31.6, 100, to 316m/s² RMS; velocity from 3.16, 10, 31.6, 100, 316, to 1000mm/s RMS; and displacement from 0.089, 0.283, 0.894, 2.83, 8.94, to 28.3mm EQ P-P. The measurement frequency ranges are 3Hz to 20kHz for acceleration, 3Hz to 3kHz for velocity, and 3Hz to 500Hz for displacement. Its A/D converter is 16-bit with a sampling frequency of 51.2kHz. The display screen is an LCD measuring 77.5×54mm with a resolution of 192×128 points and a backlight function. The memory can store 500 sets of measurement data, and the interface is RS-232C. The environmental conditions required are 0 to 40℃ and 20 to 90% RH. The power source is four No.2 batteries, which can support continuous operation for up to 22 hours, or an external power supply of 4 to 6V. The dimensions are 18.8(H)×15.6(W)×4.6(D)cm.

The standard configuration includes the VA-11B vibration analyzer host (with batteries, shoulder strap, and case), balance unit VA-11W, vibration probe PV-87 (PV-57 with a magnetic base is also available for selection), speed probe FS-11, AC adapter NC-94, communication cable, and user manuals in Chinese and English, as well as the accompanying software.