{"product_id":"991-06-50-02-01-bently-nevada-vibration-transmitter-990-991-series","title":"991-06-50-02-01 Bently Nevada Vibration Transmitter 990\/991 Series","description":"\u003cp\u003eConfigured for continuous vibration monitoring in industrial machine protection platforms, the \u003cstrong\u003eBently Nevada 991-06-50-02-01\u003c\/strong\u003e (\u003cstrong\u003e991\u003c\/strong\u003e Vibration Transmitter) provides direct physical execution of signal transduction and loop current output.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e991: Vibration Transmitter\u003c\/li\u003e\n\u003cli\u003e06: Full Scale Range (50-500 um pk-pk)\u003c\/li\u003e\n\u003cli\u003e50: Cable Length (5.0 meters)\u003c\/li\u003e\n\u003cli\u003e02: Mounting Option (Bulkhead screws)\u003c\/li\u003e\n\u003cli\u003e01: Agency Approval (CSA Division 2)\u003c\/li\u003e\n\u003c\/ul\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\u003eModel\u003c\/td\u003e\n\u003ctd\u003e991-06-50-02-01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eBently Nevada\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.44 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e10 cm x 7.5 cm x 5.2 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\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\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e+12 to +35 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoop Resistance\u003c\/td\u003e\n\u003ctd\u003e1000 Ohm max at 35 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Limit\u003c\/td\u003e\n\u003ctd\u003e23 mA typical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eMechanical Monitoring \u0026amp; Eddy-Current Validation\u003c\/h3\u003e\n\u003cp\u003eThe 991 transmitter utilizes an integrated eddy-current probe scaling architecture to convert radial shaft vibration into a proportional 4-20 mA output signal. Accurate performance requires precise gap voltage validation; the transducer must be gapped to the factory-specified -10 VDC target to maintain linearity. Rotor dynamics monitoring is sustained through this conversion, while cross-talk suppression is maintained by ensuring adequate physical separation of the probe tip from adjacent conductive surfaces and other sensors operating at the same carrier frequency.\u003c\/p\u003e\n\u003ch3\u003eOrdering Info\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1x 991 Vibration Transmitter\u003c\/li\u003e\n\u003cli\u003e1x Bulkhead mounting kit\u003c\/li\u003e\n\u003cli\u003e1x Technical data sheet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMounting: Secure the transmitter using the provided bulkhead screws on a vibration-free surface to maintain structural integrity.\u003c\/li\u003e\n\u003cli\u003eLoop Wiring: Ensure the loop resistance does not exceed 1000 Ohm at 35 VDC to maintain signal loop integrity.\u003c\/li\u003e\n\u003cli\u003eShielding: Connect signal cable shields to a common instrument ground to minimize EMI and high-frequency noise interference.\u003c\/li\u003e\n\u003cli\u003eVerification: Measure the transmitter output at the terminals to confirm the 4-20 mA signal corresponds to the calibrated vibration range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the maximum permissible loop resistance?\u003c\/p\u003e\n\u003cp\u003eThe loop resistance must not exceed 1000 Ohm when the transmitter is powered at 35 VDC to ensure sufficient voltage drop for signal operation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCan this transmitter be used in hazardous environments?\u003c\/p\u003e\n\u003cp\u003eYes, the 01 suffix confirms CSA Division 2 approval, making it suitable for operation in designated hazardous areas.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the standard current output range?\u003c\/p\u003e\n\u003cp\u003eThe transmitter provides a standard 4-20 mA proportional output representing the vibration level within the configured full-scale range.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow is the transmitter calibrated?\u003c\/p\u003e\n\u003cp\u003eThe transmitter is factory-calibrated for the specified full-scale range (50-500 um pk-pk); field recalibration is not required for standard operation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the power supply requirement?\u003c\/p\u003e\n\u003cp\u003eThe unit requires a DC voltage between +12 VDC and +35 VDC at the transmitter terminals for correct operation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDoes the transmitter include the probe?\u003c\/p\u003e\n\u003cp\u003eThe 991 series transmitter is an integrated unit; ensure the probe tip and extension cable integrity are maintained during installation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the significance of the 23 mA current limiting?\u003c\/p\u003e\n\u003cp\u003eThis safety feature prevents excessive current draw in the event of an internal fault, protecting the power supply loop.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow should the cable be protected?\u003c\/p\u003e\n\u003cp\u003eRoute the 5.0 meter coaxial cable in grounded metallic conduit to prevent signal degradation and physical damage.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":46026768318637,"sku":"991-06-50-02-01","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/Bently991-50-XX-01-00_11_6a98ed7f-2b2c-419e-adf4-c780ebe7981a.jpg?v=1783992636","url":"https:\/\/www.maxwellplc.com\/products\/991-06-50-02-01-bently-nevada-vibration-transmitter-990-991-series","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}