{"product_id":"990-05-70-01-cn-bently-nevada-990-series-vibration-transmitter","title":"990-05-70-01-CN Bently Nevada 990 Series Vibration Transmitter","description":"\u003cp\u003eConfigured for radial vibration measurements in machinery protection applications, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eBently Nevada 990-05-70-01-CN\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(\u003cstrong\u003e990\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eVibration Transmitter) provides direct physical\/electrical execution.\u003c\/p\u003e\n\u003ch3\u003eSuffix Nomenclature Breakdown\u003c\/h3\u003e\n\u003cp\u003eThe modular options for the 990-05-70-01-CN transmitter are designated as follows:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e990\u003c\/strong\u003e: Base model series for the Bently Nevada non-contacting vibration transmitter.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e-05\u003c\/strong\u003e: Full-scale range option of 0-5 mils peak-to-peak (0-125 micrometers peak-to-peak).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e-70\u003c\/strong\u003e: System length option calibrated for a 7.0 m (23.0 ft) combined probe and extension cable configuration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e-01\u003c\/strong\u003e: Integrated 35 mm DIN rail mounting clips.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e-CN\u003c\/strong\u003e: Hazardous area agency approvals including CSA Class I, Division 2, ATEX Zone 0\/Zone 2, and ABS maritime certification.\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\u003e990-05-70-01-CN\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\u003e0.5 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 x 7.4 x 5.8 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\u003e-35 to +85 deg C\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, 12 to 35 VDC, maximum current limit of 22 mA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSensor Input\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAccepts 1 non-contacting 3300NSv Proximity Probe and extension cable\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOutput Signal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4-20 mA DC proportional to vibration, with separate dynamic raw voltage output\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eMounting Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e35 mm DIN rail (Option 01)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eHazardous Approvals\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eCSA Div 2, ATEX Zone 0, ATEX Zone 2, ABS Maritime\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEddy-Current Probe Scaling and Loop Tuning\u003c\/h3\u003e\n\u003cp\u003eThe 990-05-70-01-CN transmitter combines Proximitor sensor electronics and a signal conditioner into a single unit. It performs high-frequency eddy-current probe scaling when paired with a compatible 3300NSv proximity probe. By exciting the probe coil, the transmitter senses changes in loop impedance as the shaft moves, converting this physical gap variation into a continuous 4-20 mA current loop.\u003c\/p\u003e\n\u003cp\u003eTo maintain calibration accuracy, gap voltage validation must be performed during mechanical setup. The target gap voltage of -10 VDC at the coaxial terminal ensures the 3300NSv probe sits in the middle of its linear range. Proper calibration isolates the signal from adjacent machinery vibration and preserves the 10 kHz signal resolution.\u003c\/p\u003e\n\u003ch3\u003eOrdering Info\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e1 x Bently Nevada 990-05-70-01-CN Vibration Transmitter\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e1 x Set of pre-installed 35 mm DIN rail mounting clips\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e1 x Hardcopy installation sheet\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eShielding and Grounding Standards\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCommon Mode Ground Isolation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe transmitter chassis is electrically isolated from the internal electronics. Ensure that terminal 3 (shield\/common) is grounded at a single point, typically at the DCS or safety barrier, to prevent ground loop currents.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDynamic Terminal Protection\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe coaxial BNC output provides raw dynamic voltage signals for diagnostic tools. When not connected to an analyzer, keep the BNC terminal covered with a protective dust cap to prevent moisture ingress.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDIN Rail Mechanical Stability\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEnsure the 35 mm DIN rail is rigidly anchored to the backplate inside the enclosure. High ambient machine vibration can cause mechanical wear at the mounting clips if the rail is loose.\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\u003eWhat target gap voltage is required to center this transmitter within its linear range?\u003c\/p\u003e\n\u003cp\u003eThe physical probe must be adjusted until the DC gap voltage at the dynamic output terminal measures -10 VDC.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCan this transmitter be hot-swapped while the loop is powered?\u003c\/p\u003e\n\u003cp\u003eYes, but removing the unit breaks the 4-20 mA loop, which will register as a fault at the control system. Ensure the channel is bypassed first.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the maximum distance allowed for the 4-20 mA loop wiring?\u003c\/p\u003e\n\u003cp\u003eThe loop length is limited by loop resistance; with a 24 VDC supply, it supports up to 500 ohms of total wire resistance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDoes this transmitter accept standard 3300 XL 8 mm proximity probes?\u003c\/p\u003e\n\u003cp\u003eNo, the 990 series transmitter is strictly calibrated to interface with 3300NSv probes and extension cables.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow is the dynamic vibration signal accessed for offline diagnostics?\u003c\/p\u003e\n\u003cp\u003eA portable data collector or oscilloscope can be connected directly to the coaxial BNC terminal on the front face.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat happens if a 5.0-meter cable is used instead of the 7.0-meter option?\u003c\/p\u003e\n\u003cp\u003eThe transmitter is factory-calibrated for a 7.0-meter system; a mismatch will alter the scaling factor and degrade measurement accuracy.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIs an external safety barrier required for ATEX Zone 0 installation?\u003c\/p\u003e\n\u003cp\u003eYes, an intrinsically safe zener barrier or galvanic isolator must be installed in the loop wiring for hazardous areas.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the behavior of the loop current if the probe cable is severed?\u003c\/p\u003e\n\u003cp\u003eThe loop current will drop below 3.6 mA, signaling a \"Not OK\" or sensor fault condition to the DCS.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":46025930342573,"sku":"990-05-70-01-CN","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/990-05-70-01-01_24.jpg?v=1784280196","url":"https:\/\/www.maxwellplc.com\/products\/990-05-70-01-cn-bently-nevada-990-series-vibration-transmitter","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}