丹麦B&K 测量放大器 前置放大器 TYPE2690 B&K的人工头TYPE4218 双通道(单探头)声强调理放大器 适调放大器 信号调理可以改进测量系统的性能和可靠性。一个典型的系统包括信号调理硬件，作为原始信号和传感器输出到测量设备之间的接口。调理放大器为系统提供信号放大、电绝缘、滤波、传感器供电、过载检测及传感器电子数据表（TEDS）功能支持。 调理输入的主要类型有： 传声器 DeltaTron?(或IEPE) 电荷 强度 桥式和差分 用途 Specially suited for automotive use. Developed in association with major car manufacturers, for high-quality field and laboratory measurement systems Used with charge accelerometers, hydrophones, force transducers, condenser microphones, DeltaTron? accelerometers, DeltaTron preamplifiers, voltage input and sound intensity probes Field recording of vibration and acoustic **s Specially suitable for applications where shocks and impulses occur such as gas turbine testing and munitions testing (Types 2692-C and -D only) 特点 Highly flexible construction – 1, 2, 3 or 4 channel configurations, or a combination of acoustic and vibration transducer inputs is possible High input ** range. Low noise. Extensive overload facilities Supports transducers with TEDS according to IEEE 1451.4 Available for: charge, microphone, sound intensity, DeltaTron and very high input Compact robust design and battery operation makes it suitable for use in the field (and in the laboratory) Serial control interface (RS–232) allows computer control of setups and test functions. A large number of amplifiers can be controlled from a single PC High accuracy due to reliable construction and a wide range of calibration options. Built-in patented Charge Injection Calibration (CIC) and patented Mounted Resonance Testing Wide range of filters that can be set up for specific tasks Rack-mounting fittings available Portability and Rack Mounting NEXUS Conditioning Amplifiers are equally suited for laboratory and field use. They are compact and self-contained with an optional rechargeable battery. They are lightweight too, weighing around 3 kg (6.6 lb.), including battery. Rack-mounting fittings are available for in-car testing purposes as well as for stationary use. The portable 19" rack KQ-0158 can contain up to 9 NEXUS units. Up to 16 NEXUS channels and a DAT recorder can be mounted in a compact unit (UA-1409) which is particularly suitable for automotive use. UA-1409 has fittings for a carrying strap. Reliable Design To survive the harsh electrical environment in cars, NEXUS conditioning amplifiers have specifications that far exceed the strict European EMC immunity requirements. ISO 7637-1 ?Road Vehicles – Electrical disturbance by conduction and coupling” requirements are met. Mechanical robustness is equally high and meets MIL – STD – 810C and IEC 60068 – 2 – 6 standards. Environmental Since all NEXUS amplifiers are built for portable outdoor use, they meet strict requirements for temperature and humidity. The operating temperature range extends from – 10 to +55°C (+14 to +131°F). The instrument will withstand rain if kept with the front panel facing upwards. However, because of the sockets on the back panel it is not watertight. Modular Flexibility A number of standard versions are available to cover the most widely used combinations. If you require a combination not found below, we can provide a custom-made version. NEXUS Standard Types and Options NEXUS Name and Description NEXUS Type Number 2-channel Microphone Conditioning Amplifier with A, B, C and D Filters 2690-A-0F2 4-channel Microphone Conditioning Amplifier with A, B, C and D Filters 2690-A-0F4 1-channel Microphone Conditioning Amplifier 2690-A-0S1 2-channel Microphone Conditioning Amplifier 2690-A-0S2 4-channel Microphone...

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