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9200, 74712, 47633 Seismoprobe. 速度传感器系统
本特利内华达Seismoprobe.速度传感器系统测量轴承箱、机壳或结构的绝对（相对于自由空间）振动。该两线系统由传感器、电缆和可选的速度-位移转换器组成。 Seismoprobe.系列速度传感器是两线结构，采用动线圈技术提供直接正比于传感器振动速度的电压输出。与固体速度传感器（本质上是加速度计中嵌入积分电子电路）不同，动线圈传感器对冲击或脉冲励磁的敏感性降低，是更好的应用选择。此外，由于它们不要求外部电源，所以使便携式测量应用更加方便。 注: 对于大多数应用，本特利内华达的Velomitor.系列速度传感器包含了固体技术，在机壳速度测量中性能高好，结构更加坚固。 Seismoprobe.速度传感器共有三种： . 9200: 9200 是两线传感器，适用于连续监测或与测试或故障诊断仪表一起应用于周期性测量中。当与整体电缆一同订购时，9200 具有卓越的抗腐蚀性，不需要额外保护。 . 74712: 74712 是9200 的高温应用版本。 . 47633: 47633 的安装方式较少，只提供整体铠装电缆。它的设计采用可替换的夹头，当动线圈磨损后易于替换。它用于速度传感器安装方式有限且只需提供简单性能的一般用途机械。
Two types of Seismoprobe Velocity Transducers are available:
9200: The 9200 is a two-wire transducer suitable for continuous monitoring or for periodic measurements in conjunction with test or diagnostic instruments. When ordered with the integral cable option, the 9200 has excellent resistance to corrosive environments without need of additional protection.
74712: The 74712 is a high temperature version of the 9200. Various interconnect cables are available for connecting the 9200 and 74712 transducers to other instruments or a velocity-to-displacement converter. These cables are available in one-foot (300 mm) increments, with or without stainless steel armor.
One type of velocity-to displacement converter (VDC) is available: 9513: to be used with 9200 and 74712 transducers.
Specifications 9200 and 74712 Seismoprobe Velocity Transducers Specifications are at approximately +22°C (+72°F) with 25 mm/s (1 in/s) of machine casing vibration at 100 Hz (6000 cpm) with a 10 kilo ohm load unless otherwise specified. Electrical Sensitivity: 20 mV/mm/s (500 mV/in/s), ±5% when properly terminated and oriented at the angle of calibration. Frequency Response: From minimum operating frequency (see ordering information) to 1 kHz (60,000 cpm); +0, -3dB typical.
Dynamic Operating Range: 2.54 mm (0.100 in) peak to peak maximum displacement. Shock Resistance: Withstands 50 g peak maximum acceleration along nonsensitive axis. Transverse Sensitivity: ±10% maximum. Polarity of Output Signal Pin A goes positive with respect to Pin B when the transducer case velocity is towards the connector. Leadwire Length: 305 meters (1,000 feet) maximum between Seismoprobe Velocity Transducer and 3300 or 3500 Monitor. Consult manual for frequency roll-off at longer lengths.
