{"product_id":"990-05-70-02-05-bently-nevada-990-series-4-20-ma-vibration-monitor","title":"990-05-70-02-05 Bently Nevada 990 Series 4–20 mA Vibration Monitor","description":"\u003ch3\u003e\u003cb\u003eBently Nevada 990-05-70-02-05 | 990 Vibration Transmitter\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eBently Nevada 990-05-70-02-05\u003c\/strong\u003e is a 2-wire vibration transmitter for machinery monitoring. It accepts one compatible 3300 NSv non-contacting proximity probe and extension cable. The transmitter converts vibration-related probe input into a 4–20 mA signal for compatible control and monitoring systems.\u003c\/p\u003e\n\u003cp\u003eThis configured unit provides a 0–5 mil peak-to-peak full-scale range, a 7.0 m system length option, bulkhead-screw mounting, and specified hazardous-area and maritime approvals. Confirm the complete configuration against the equipment nameplate and project requirements before ordering.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eConfiguration Breakdown | Read the Suffix\u003c\/b\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSuffix\u003c\/th\u003e\n\u003cth\u003eOption\u003c\/th\u003e\n\u003cth\u003eConfiguration meaning\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e05\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFull-scale range\u003c\/td\u003e\n\u003ctd\u003e0–5 mils peak-to-peak (0–125 μm peak-to-peak)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e70\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSystem length\u003c\/td\u003e\n\u003ctd\u003e7.0 m (23.0 ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e02\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eBulkhead screws\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e05\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAgency approvals\u003c\/td\u003e\n\u003ctd\u003eCSA Division 2, ATEX Zone 0, ATEX Zone 2, and ABS maritime approval, as specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eModel code:\u003c\/strong\u003e 990 – 05 – 70 – 02 – 05\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOrigin stated by supplier:\u003c\/strong\u003e Made in U.S.A.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eOperating Parameters\u003c\/b\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eBently Nevada\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct family\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.plcsparehub.com\/collections\/990-991-and-177230-transmitter\"\u003e990 Vibration Transmitter\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e990-05-70-02-05\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProbe input\u003c\/td\u003e\n\u003ctd\u003eOne 3300 NSv non-contacting proximity probe and extension cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFull-scale range\u003c\/td\u003e\n\u003ctd\u003e0–5 mils pp (0–125 μm pp)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput\u003c\/td\u003e\n\u003ctd\u003e4–20 mA DC, 2-wire configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoop accuracy\u003c\/td\u003e\n\u003ctd\u003e±1.5% over specified full-scale range, subject to the stated test conditions and incremental scale factor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply voltage\u003c\/td\u003e\n\u003ctd\u003e+12 to +35 VDC at transmitter terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum loop resistance\u003c\/td\u003e\n\u003ctd\u003e1,000 Ω, including cable, at 35 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTypical current limiting\u003c\/td\u003e\n\u003ctd\u003e23 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency response\u003c\/td\u003e\n\u003ctd\u003e5 Hz to 6,000 Hz, +0\/−3 dB as supplied\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProbe gap\u003c\/td\u003e\n\u003ctd\u003e0.5–1.75 mm (20–55 mils) from target for full-scale range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum target size\u003c\/td\u003e\n\u003ctd\u003e9.5 mm (0.375 in) diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eZero and span\u003c\/td\u003e\n\u003ctd\u003eExternal, non-interacting adjustments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNOT OK signal defeat\u003c\/td\u003e\n\u003ctd\u003eOutput falls below 3.6 mA within 100 μs after a NOT OK condition; recovery is typically 2–3 seconds after the condition clears\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Proximitor sensor output cable distance\u003c\/td\u003e\n\u003ctd\u003e3 m (10 ft), to BNC connector, as specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmitter weight\u003c\/td\u003e\n\u003ctd\u003e0.43 kg (0.9 lbm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHazardous-area supply note\u003c\/td\u003e\n\u003ctd\u003eSource information specifies a 28 V power supply for nonhazardous, Zone 2, or Division 2 locations. Verify the installation requirements for the actual approval and site classification.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cb\u003eSignal Chain and Installation Checks\u003c\/b\u003e\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eProbe and extension:\u003c\/strong\u003e Use a compatible 3300 NSv probe and extension cable. Confirm the specified system length and connector arrangement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical gap:\u003c\/strong\u003e Set the probe gap within 0.5–1.75 mm (20–55 mils) when the full-scale range is required. Check the target diameter and surface condition.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLoop supply:\u003c\/strong\u003e Provide +12 to +35 VDC at the transmitter terminals. Include cable and receiver resistance when checking the 1,000 Ω loop limit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal receiver:\u003c\/strong\u003e Verify that the PLC analog input, DCS input, or machinery monitor accepts a 2-wire 4–20 mA signal and is configured for the correct engineering range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZero and span:\u003c\/strong\u003e Adjust the external controls using the approved calibration procedure and the correct test setup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArea approval:\u003c\/strong\u003e Confirm that the transmitter’s approval markings match the hazardous-area classification, installation method, and governing site requirements.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003e\u003cb\u003eEquipment Fit and Application Areas\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe 990 transmitter is suited to machinery installations where a compatible proximity probe measures shaft vibration and a current signal must be transmitted to a monitoring or control system.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotating machinery:\u003c\/strong\u003e Pumps, fans, compressors, and other machines with compatible shaft-proximity measurement points.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePLC and DCS monitoring:\u003c\/strong\u003e Provides a 4–20 mA vibration-related signal to compatible analog input channels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProcess and utility equipment:\u003c\/strong\u003e Supports vibration trending and alarm strategies when integrated with the site’s monitoring logic.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine installations:\u003c\/strong\u003e The specified ABS maritime approval may support applicable shipboard projects; confirm approval scope and installation conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHazardous locations:\u003c\/strong\u003e Use only where the exact approval, wiring method, and installation requirements have been verified.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIt is not a stand-alone vibration analysis system. Confirm whether the application requires additional machinery protection functions, dynamic waveform data, or system-level alarm logic.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eDiagnostic Behavior and Field Troubleshooting\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe transmitter’s NOT OK signal behavior provides a useful indication of an invalid or unacceptable measurement condition. When NOT OK occurs, the output is specified to fall below 3.6 mA within 100 μs. It typically returns after the condition clears, with a 2–3 second recovery interval.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSymptom\u003c\/th\u003e\n\u003cth\u003eEngineering checks\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoop current below 3.6 mA\u003c\/td\u003e\n\u003ctd\u003eCheck transmitter NOT OK status, probe connection, extension cable, supply voltage, and loop wiring.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent remains near a fixed value\u003c\/td\u003e\n\u003ctd\u003eCheck probe gap, target condition, loop continuity, and whether the receiver is correctly scaled.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReading differs from expected vibration\u003c\/td\u003e\n\u003ctd\u003eVerify the full-scale option, probe compatibility, gap setting, receiver range, and calibration procedure.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntermittent measurement\u003c\/td\u003e\n\u003ctd\u003eInspect connectors, cable routing, mechanical mounting, and the stability of the DC supply.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnexpected loop loading\u003c\/td\u003e\n\u003ctd\u003eCalculate the total loop resistance, including input impedance and cable resistance, against the permitted limit at the actual supply voltage.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eUse the equipment manual and site diagnostic procedures to determine the cause of a NOT OK condition. A low loop current indicates a measurement or loop fault state; it does not, by itself, identify the failed component.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eGlobal PLC Spare HUB Review\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eFor replacement selection, match the complete 990 suffix—not only the 990 family name. The full-scale option determines the intended measurement range, while system length and mounting affect the physical installation. Approval codes are especially important for hazardous-area and marine projects.\u003c\/p\u003e\n\u003cp\u003eBefore commissioning, check the probe gap, supply voltage, loop resistance, receiver scaling, and output response. A controlled loop test helps distinguish transmitter configuration issues from probe, wiring, or receiving-channel faults.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eSupply, Warranty, and Shipping\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct:\u003c\/strong\u003e Bently Nevada 990-05-70-02-05 vibration transmitter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 12 months\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShipping carriers:\u003c\/strong\u003e FedEx, UPS, and DHL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDispatch estimate:\u003c\/strong\u003e Typically 24–48 hours after order processing, subject to stock and order confirmation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrder verification:\u003c\/strong\u003e Share the complete part number and application area so the configuration and approval requirements can be checked.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eFrequently Asked Questions\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ1: What information should I provide when requesting a replacement quote?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eProvide the complete model number, nameplate details, required quantity, installation area classification, and whether the existing probe and extension cable will also be replaced. These details help verify configuration suitability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ2: How can I confirm that the 7.0 m system-length option suits my installed probe assembly?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCheck the installed probe and extension cable part numbers and their combined system length against the equipment documentation. Do not assume the transmitter’s length suffix alone confirms every cable component in the field.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ3: What should I check if a PLC displays a vibration value that does not match the transmitter’s range?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCompare the PLC channel scaling with the transmitter’s 0–5 mil pp full-scale option. Then verify the loop current at known test points and review the receiver’s engineering-unit conversion.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ4: Is the listed agency approval sufficient for every hazardous-area installation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. Confirm the exact approval marking, jurisdiction, zone or division, installation method, and any associated system requirements. The project’s safety or hazardous-area engineer should approve the final installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ5: Should I replace the probe and transmitter together when troubleshooting a low-current fault?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNot automatically. First inspect loop power, wiring, connectors, probe gap, and NOT OK status. If the fault remains, use the approved test procedure to isolate the probe, cable, transmitter, and receiving input before selecting replacement parts.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/990_Graphs_and_Figures_8ba4a14f-832f-4772-a484-c09fd48b12f9.png?v=1784875470\" alt=\"\"\u003e\u003c\/p\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":45013924380854,"sku":"990-05-70-02-05","price":118.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/BentlyNevada990_6_26470a41-5a13-4d0b-a17a-3b9c9ddae77d.jpg?v=1792733844","url":"https:\/\/www.plcsparehub.com\/products\/990-05-70-02-05-bently-nevada-990-series-4-20-ma-vibration-monitor","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}