{"product_id":"991-05-50-01-00-bently-nevada-991-series-thrust-transmitter","title":"991-05-50-01-00 Bently Nevada 991 Series Thrust Transmitter","description":"\u003cp\u003eConfigured for monitoring axial rotor position, the \u003cstrong\u003eBently Nevada 991-05-50-01-00\u003c\/strong\u003e (\u003cstrong\u003e991-05-50-01-00\u003c\/strong\u003e Thrust Transmitter) provides direct electrical execution for eddy-current probe signal processing and 4-20 mA output transmission.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e991: Base Model (Thrust Transmitter)\u003c\/li\u003e\n\u003cli\u003e05: System Length (5.0 m \/ 16.4 ft)\u003c\/li\u003e\n\u003cli\u003e50: Configuration option\u003c\/li\u003e\n\u003cli\u003e01: 35 mm DIN-rail mounting clips\u003c\/li\u003e\n\u003cli\u003e00: No additional options\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\u003e991-05-50-01-00\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\u003e7.3 x 5 x 10 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-52 to +177 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e23 mA typical (current limiting)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Loop Resistance\u003c\/td\u003e\n\u003ctd\u003e1,000 Ohm at 35 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eMechanical Monitoring and Signal Processing\u003c\/h3\u003e\n\u003cp\u003eThe 991 Thrust Transmitter performs internal signal conditioning to translate raw eddy-current probe inputs into a proportional 4-20 mA output. Accurate operation requires periodic gap voltage validation against -10 VDC targets to confirm the probe is operating within its linear range. The transmitter maintains rotor dynamics data integrity by utilizing external zero and span adjustments, which are non-interacting for simplified calibration. Effective cross-talk suppression is achieved by the transmitter's internal filtering, ensuring stable axial position data despite electrical noise within the instrumentation loop.\u003c\/p\u003e\n\u003ch3\u003eOrdering Info\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x 991-05-50-01-00 Thrust Transmitter\u003c\/li\u003e\n\u003cli\u003e1 x 35 mm DIN-rail mounting clip set\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDIN-Rail Mounting: Secure the transmitter to a 35 mm DIN rail; ensure the mounting clips are fully snapped into place for stable mechanical retention.\u003c\/li\u003e\n\u003cli\u003eWiring: Utilize shielded twisted-pair cabling for the 4-20 mA output to prevent electromagnetic interference; ensure the shield is grounded at the control system end only.\u003c\/li\u003e\n\u003cli\u003eCalibration: Perform zero and span adjustments using a calibrated voltmeter; the non-interacting design allows for independent setting of signal endpoints.\u003c\/li\u003e\n\u003cli\u003eLoop Integrity: Verify the total loop resistance remains below 1,000 Ohm at 35 VDC to ensure reliable signal transmission over long cable runs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eCan the 991 Transmitter be hot-swapped while the loop is powered?\u003c\/p\u003e\n\u003cp\u003eThe device is intended for fixed installation; verify control system protocols before disconnecting any instrumentation loop to prevent unintended process trips.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow does the non-interacting adjustment work?\u003c\/p\u003e\n\u003cp\u003eThe internal circuitry allows the zero setting to be changed without affecting the span slope, significantly reducing the time required for field calibration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIs the transmitter polarity sensitive?\u003c\/p\u003e\n\u003cp\u003eYes, correct polarity for both the power\/loop connection and the probe input is mandatory for proper transmitter function.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat happens if loop resistance exceeds 1,000 Ohm?\u003c\/p\u003e\n\u003cp\u003eExceeding the maximum loop resistance will result in signal degradation and inability of the transmitter to maintain the 20 mA maximum current output.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCan I use a probe extension cable with this transmitter?\u003c\/p\u003e\n\u003cp\u003eThe transmitter is factory-calibrated for a specific total system length; ensure the extension cable matches the 5.0 m specification provided.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow is the transmitter protected against overcurrent?\u003c\/p\u003e\n\u003cp\u003eThe unit features internal current limiting that restricts output to 23 mA typical, preventing damage to the device during short-circuit conditions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDoes this transmitter support HART communication?\u003c\/p\u003e\n\u003cp\u003eNo, the 991 series is a dedicated analog transmitter providing a direct 4-20 mA output signal without digital communication protocols.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhy is the storage temperature range so wide?\u003c\/p\u003e\n\u003cp\u003eThe device is built with high-reliability industrial components rated for extreme thermal cycling to ensure survivability in varied environmental conditions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":46026791321773,"sku":"991-05-50-01-00","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_3.jpg?v=1783405054","url":"https:\/\/www.maxwellplc.com\/ga\/products\/991-05-50-01-00-bently-nevada-991-series-thrust-transmitter","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}