ST5484E-151-1482-00振動變送器鴻泰順達產品穩定性好

ST5484E-151-1482-00振動變送器鴻泰順達產品穩定性好

The ST5484E is a self-contained seismic velocity transmitter that incorporates a piezoelectric accelerometer, signal integrator, RMS peak detector, and a 4-20 mA signal conditioner into a single package. It can be mounted directly on a machine case or bearing housing without intervening signal conditioning equipment. The amplitude of the integrated acceleration (velocity) signal is converted to a proportional 4-20 mA signal compatible with industrial process control instrumentation such as PLCs, DCSs, and SA systems that can provide trending and/or alarming capabilities for a simplified vibration monitoring strategy. When the flying lead or terminal block connector options are chosen, the transmitter does not need a separate environmental housing and can directly accept conduit. To reduce installed cost, it can be used with barriers for intrinsically safe installations, or wired directly to explosion-proof conduit fittings for explosionproof installations. Need A Local Display? When continuous, local indication of vibration levels is required at the transmitter, the Metrix ST5491E provides these capabilities. Its sensing and transmitter elements are similar to the ST5484E, but it includes a convenient 2? digit LCD display in an integral conduit elbow and is rated for use in temperatures from -10o C to +70o C. Refer to Metrix datasheet 1004598 for ordering information and detailed specifications. A vibration transmitter may be appropriate in applications where a stand-alone monitoring system may not be warranted. The ST5484E handles general-purpose vibration measurements on a wide range of rotating and reciprocating machinery with rotative speeds between 120- and 6,000-rpm. Seismic measurements are suitable for machines with rolling-element bearings because shaft vibration in such machines is usually transmitted directly through the bearing to the bearing housing without substantial damping or attenuation. Seismic transducers can also measure vibration that does not originate at the shaft, such as bearing-related wear and defects, footing/foundation problems, piping resonances that are coupled to the machine, etc. Why Measure Velocity? Acceleration and displacement levels are heavily influenced by the frequencies at which the vibration is occurring, while velocity levels are much less influenced. Thus, although acceleration, velocity, and displacement measurements are inter-related mathematically, seismic velocity measurements tend to be more consistent over a wide range of frequencies than either displacement or acceleration. Consequently, broadband (sometimes called “overall” or “unfiltered”) velocity measurements are appropriate for monitoring many machines as a reliable indicator of damaging vibratory energy, with the notable exception of machines with fluid-film bearings, which are usually better addressed by shaftobserving proximity probes. Casing displacement is not a practical measurement to make directly and is typically just an integrated seismic velocity measurement. As such, the primary decision when selecting a seismic sensor will usually be whether to measure casing velocity or casing acceleration. As noted above, casing velocity will often be more appropriate because it tends to be a more reliable indicator of damaging vibratory energy over a broad frequency spectrum for low- to medium-speed machinery. Flying Leads (Option D=0, 1, 5, or 6) (2-wire shown; 4-wire also available) 2-Pin Terminal Block (Option D=2) 4-Pin Terminal Block (Option D=3) 0598 O