{"product_id":"990-04-xx-01-01-bently-nevada-990-series-vibration-transmitter","title":"990-04-XX-01-01 Bently Nevada 990 Series Vibration Transmitter","description":"\u003cp\u003eConfigured for continuous monitoring of shaft vibration in industrial rotating machinery, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eBently Nevada 990-04-XX-01-01\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(\u003cstrong\u003e990\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eVibration Transmitter) provides direct physical\/electrical execution. This integrated transducer system conditions the high-frequency carrier signal from the probe and converts it into a proportional 4-20 mA output signal. The unit performs signal processing locally, enabling direct interface with PLC or DCS platforms for simplified machinery protection and diagnostic applications.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e990\u003c\/strong\u003e: 990 Vibration Transmitter model.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e04\u003c\/strong\u003e: Full-scale range option (0-4 mils peak-to-peak).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eXX\u003c\/strong\u003e: System length (customer configurable).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e01\u003c\/strong\u003e: Mounting option (35 mm DIN rail clips).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e01\u003c\/strong\u003e: Agency approval option (CSA Division 2).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eModel\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e990-04-XX-01-01\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBrand\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eBently Nevada\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOrigin\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eUSA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eWeight\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.44 kg\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eShipping Dimensions\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e10.0 cm x 7.5 cm x 5.2 cm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCase Material\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAISI 303 or 304 Stainless Steel\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCable Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e75 ohm coaxial, FEP insulated\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eTensile Strength\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e222 N (probe case to lead)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eMechanical Monitoring and Signal Dynamics\u003c\/h3\u003e\n\u003cp\u003eThe 990 series transmitter utilizes eddy-current probe scaling calibrated for standard AISI 4140 steel targets. Accurate vibration measurement requires gap voltage validation (-10 VDC nominal target) to ensure the transducer is centered within its linear range. Consistent rotor dynamics monitoring is maintained by the transmitter's internal signal processing, which converts displacement data into a scaled current output. Cross-talk suppression is achieved by following established separation requirements for adjacent probes, minimizing magnetic field interference and ensuring high-fidelity vibration data during operation.\u003c\/p\u003e\n\u003ch3\u003eOrdering Info\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e1 990-04-XX-01-01 Vibration Transmitter module\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e1 DIN rail mounting assembly\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e1 Technical installation and setup manual\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMounting and Enclosure\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eSecure the unit to a 35 mm DIN rail within a clean, dry, and grounded metallic enclosure.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEnsure the enclosure is physically isolated from sources of high-frequency vibration or extreme electromagnetic interference.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWiring and Grounding\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eConnect the 4-20 mA output to the instrumentation loop using shielded twisted-pair cabling.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTerminate the shield at the instrumentation end to a clean signal common; do not ground the shield at the transmitter end to avoid ground loop currents.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eVerify that the probe cable connector is tightened and sealed to prevent moisture ingress.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eDoes the transmitter support loop-powered operation?\u003c\/p\u003e\n\u003cp\u003eYes, the 990 transmitter is designed to operate on a 4-20 mA current loop, with power supplied directly by the control system loop power supply.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the response time for the 4-20 mA output?\u003c\/p\u003e\n\u003cp\u003eThe transmitter provides a standard response time defined by its internal filter settings, typically sufficient for 10 kHz vibration tracking applications.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCan the range be modified after installation?\u003c\/p\u003e\n\u003cp\u003eThe range is defined by the model suffix (04 for 0-4 mils). Hardware range changes require replacing the unit with the appropriate model configuration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat happens if the probe becomes disconnected?\u003c\/p\u003e\n\u003cp\u003eThe transmitter circuitry is designed to drive the output to a fault condition (typically \u0026lt; 3.6 mA or \u0026gt; 21 mA) to indicate a sensor fault to the DCS\/PLC.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIs the 990 transmitter compatible with other probe types?\u003c\/p\u003e\n\u003cp\u003eNo, the 990 is calibrated for use with specific Bently Nevada 990-series eddy-current probes; utilizing non-specified transducers will result in inaccurate readings.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow is the internal calibration verified?\u003c\/p\u003e\n\u003cp\u003eField verification can be performed using a signal generator to simulate the probe input and measuring the resulting 4-20 mA output current.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDoes this device support HART communication?\u003c\/p\u003e\n\u003cp\u003eNo, the 990 series transmitter is an analog-only device and does not support digital protocol communication or HART modulation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the purpose of the CSA Division 2 approval?\u003c\/p\u003e\n\u003cp\u003eThis certification signifies that the device is approved for operation in hazardous locations classified as Class I, Division 2, where flammable gases may be present.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":46026839523501,"sku":"990-04-XX-01-01","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/990_50c1fda8-4709-40e2-a142-19b819753bcd.jpg?v=1782723313","url":"https:\/\/www.maxwellplc.com\/ga\/products\/990-04-xx-01-01-bently-nevada-990-series-vibration-transmitter","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}