{"product_id":"990-04-xx-01-05-bently-nevada-vibration-transmitter-990-series","title":"990-04-XX-01-05 Bently Nevada Vibration Transmitter 990 Series","description":"\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eBently Nevada 990-04-XX-01-05\u003c\/strong\u003e, also cataloged as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e990-04\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eVibration Transmitter, operates as a dedicated hardware component for continuous rotational vibration signal conditioning and 4-20 mA loop transmission within Turbomachinery Supervisory Instrumentation (TSI) platforms.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eModel: 990-04\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eVersion: XX-01-05 (Configurable Output\/Mounting Interface)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHardware Class: Two-Wire Vibration Transmitter\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-01-05\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\u003e5.0 cm x 6.0 cm x 10.0 cm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOperating Temp\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eIndustrial Standard Range\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003ePower Consumption\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eLoop-Powered (Two-Wire)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSignal Output\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4-20 mA \/ Proportional\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eMechanical Monitoring and Signal Integrity\u003c\/h3\u003e\n\u003cp\u003eThe 990-04 transmitter utilizes eddy-current probe scaling to convert high-frequency rotor vibration into a conditioned proportional current output. Optimal performance requires precise gap voltage validation, targeting -10 VDC at the probe tip to ensure a linear measurement range for rotor displacement. Integrated cross-talk suppression circuitry minimizes signal interference when multiple transmitters are installed in close proximity on the same machine casing. The unit continuously evaluates rotor dynamics, providing a stable output signal that reflects true mechanical state changes rather than transient electrical noise.\u003c\/p\u003e\n\u003ch3\u003e## Ordering info\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e990-04 Vibration Transmitter (990-04-XX-01-05)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eConnector interface kit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFactory calibration report\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTechnical installation guide\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\u003eMounting: Fasten the transmitter to a rigid machine surface; ensure the enclosure is shielded from excessive direct thermal radiation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eGrounding: Establish a single-point connection to the system ground for the cable shield to prevent signal degradation caused by ground potential differences.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProbe Interface: Adjust the proximity probe gap to the specified linear voltage range; monitor the output signal during machine rotation to verify signal stability.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCabling: Utilize twisted-pair shielded cable for the 4-20 mA loop; ensure total loop resistance is within the allowable range for the applied DC voltage.\u003c\/p\u003e\n\u003c\/li\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 990-04 transmitter provide raw vibration signal output?\u003c\/p\u003e\n\u003cp\u003eThe primary output is a processed 4-20 mA signal proportional to vibration amplitude, though buffered raw signals may be accessible depending on the specific model configuration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the target gap voltage for the eddy-current probe?\u003c\/p\u003e\n\u003cp\u003eStandard operation requires a gap voltage of -10 VDC to ensure the signal remains within the linear measurement range of the transducer.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCan this transmitter be used in a hazardous environment?\u003c\/p\u003e\n\u003cp\u003eInstallation in hazardous areas requires compliance with local safety standards and the use of approved intrinsic safety barriers; verify site-specific requirements.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow is the vibration range scaled?\u003c\/p\u003e\n\u003cp\u003eThe scaling is fixed based on the model configuration and the sensitivity of the associated proximity probe system.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the response time of the 4-20 mA output?\u003c\/p\u003e\n\u003cp\u003eThe output circuitry is designed for high-speed tracking of vibration amplitude, suitable for standard machinery protection and trend monitoring loops.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDoes the transmitter require periodic maintenance?\u003c\/p\u003e\n\u003cp\u003eRegular validation of the probe gap and output signal accuracy is recommended to ensure the system remains within operational tolerances.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIs the 990-04 compatible with older 990 series systems?\u003c\/p\u003e\n\u003cp\u003eThis model is intended for standard 990 series TSI infrastructure; confirm rack or system revision compatibility before deployment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCan I replace the transmitter while the machine is operational?\u003c\/p\u003e\n\u003cp\u003eLive replacement is possible if safety protocols for the monitoring loop allow, provided the signal loop is maintained or bypassed correctly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":45378089353389,"sku":"990-04-XX-01-05","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/bently-nevada-990-04-xx-01-05-vibration-transmitter-oti51z0pue2.jpg?v=1764225487","url":"https:\/\/www.maxwellplc.com\/products\/990-04-xx-01-05-bently-nevada-vibration-transmitter-990-series","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}