{"product_id":"bently-nevada-990-08-xx-01-cn-990-vibration-transmitter","title":"Bently Nevada 990-08-XX-01-CN 990 Vibration Transmitter","description":"\u003ch2\u003eBently Nevada 990-08-XX-01-CN 990 Vibration Transmitter\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eBently Nevada 990-08-XX-01-CN\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e990\u003c\/strong\u003e Vibration Transmitter, operates as a dedicated hardware component for conditioning eddy-current proximity probe signals into proportional current loops within machinery control and monitoring platforms.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e990-08-XX-01-CN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBently Nevada\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.44 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10.0 cm x 7.5 cm x 5.2 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temp\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-35 deg C to +85 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Consumption\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLoop-powered (12 to 35 VDC input)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3300 NSv proximity probe with matching extension cable (5 m or 7 m)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Signal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4-20 mA DC proportional to peak-to-peak vibration amplitude\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDiagnostic Interface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNon-isolated BNC coaxial connector and PROX OUT \/ COM terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCircuit Protection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIntegrated Not OK \/ Signal Defeat loop suppression\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting Options\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e35 mm DIN-rail clips or integrated bulkhead mounting screws\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eMachinery Monitoring \u0026amp; TSI Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe transmitter functions natively as a proximity transducer interface, converting raw high-frequency RF signals into a linear voltage variation before rectifying it into a 4-20 mA current loop. During initialization and routine diagnostic sweeps, gap voltage validation targets a nominal -10 VDC baseline across the PROX OUT and COM terminals to verify the physical distance between the probe tip and the target shaft. This electrical offset isolation prevents cross-talk suppression failures across multi-axis arrangements and allows high-fidelity extraction of rotor dynamics via the unconditioned BNC port. If the probe gap exceeds calibrated physical limits or experiences a cable disconnect, the integrated Not OK circuit triggers immediately, clamping the loop output to prevent false machinery protection alarms.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can the 990 transmitter be used with standard 3300 XL 8 mm proximity probes?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA: No.\u003c\/strong\u003e The internal driver circuitry of the 990 transmitter is specifically tuned and calibrated for the electrical characteristics of the 3300 NSv proximity probe and its corresponding 5-meter or 7-meter extension cable. Connecting mismatched probe diameters will cause incorrect eddy-current probe scaling and non-linear output errors.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the exact function of the dynamic BNC connector during active plant operation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA: The BNC port provides an unconditioned, raw voltage signal directly from the proximity probe.\u003c\/strong\u003e This allows diagnostic equipment, such as vibration analyzers or data acquisition systems, to capture raw peak-to-peak wave shapes and gap voltage values without disconnecting loop wiring or interrupting the primary 4-20 mA control path.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does the Not OK\/Signal Defeat circuit respond during a total probe failure?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA: When the circuit detects an open loop, short circuit, or an out-of-range gap voltage condition, the 4-20 mA loop current is driven below 3.6 mA.\u003c\/strong\u003e This low current state signals the host control system that the transducer loop is invalid, suppressing downstream alarm logic to prevent false trips.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnclosure and Environmental Shielding:\u003c\/strong\u003e Install the transmitter inside a sealed, dust-proof industrial enclosure to protect the non-interacting zero and span adjustment potentiometers from corrosive environmental particulates and moisture.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoaxial Cable Layout and Isolation:\u003c\/strong\u003e Ensure the coaxial cable connection from the 3300 NSv extension cable to the transmitter is tight and free of mechanical tension. Insulate the outer barrel of the coaxial connector to prevent accidental contact with the metal enclosure chassis, which can introduce ground loops and corrupt the vibration readings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShield Termination and Grounding:\u003c\/strong\u003e Terminate the outer shield of the 4-20 mA loop signal cable at a single point, preferably at the control system cabinet ground rack. Do not ground the shield at both ends to prevent circulating ground currents from introducing signal noise into the diagnostic telemetry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConduit Routing Constraints:\u003c\/strong\u003e Route the low-voltage sensor input wiring and the 4-20 mA loop wiring in dedicated, grounded metal conduits separated from high-voltage AC power distribution lines or variable frequency drive (VFD) output cables to minimize electromagnetic interference.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: #e74c3c;\"\u003e\u003cspan style=\"font-size: 20px;\"\u003e\u003cspan style=\"font-family: Arial,Helvetica,sans-serif;\"\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":44318792384611,"sku":null,"price":180.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0549\/2775\/3315\/files\/990-08-XX-01-CN-1.jpg?v=1783321503","url":"https:\/\/precisemodule.com\/products\/bently-nevada-990-08-xx-01-cn-990-vibration-transmitter","provider":"Precise Module Ltd.","version":"1.0","type":"link"}