{"product_id":"bently-nevada-990-10-70-03-01-industrial-automation-module","title":"Bently Nevada 990-10-70-03-01 Industrial Automation Module","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThe Bently Nevada 990-10-70-03-01 990 Vibration Transmitter is a critical component for continuous vibration monitoring in rotating machinery. Designed to accept one non-contacting 3300 NSv Proximity Probe and extension cable, this transmitter converts shaft vibration into a 4-20 mA signal. Its built-in NOT OK\/signal defeat circuit ensures that when a fault condition occurs—such as probe damage or power loss—the output drops below 3.6 mA within 100 microseconds, alerting operators instantly. This proactive failure response helps prevent catastrophic machine damage and reduces unplanned downtime.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications Breakdown\u003c\/h2\u003e\u003cp\u003eKey parameters from the datasheet define the 990-10-70-03-01's performance boundaries:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Requirement:\u003c\/strong\u003e +12 to +35 Vdc at the transmitter terminal ensures wide compatibility with existing loops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-20 mA Output:\u003c\/strong\u003e Linear over the selected full-scale range (0-10 mils pp or 0-250 μm pp) with ±1.5% accuracy (additional to Prox Out Incremental Scale Factor).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Loop Resistance:\u003c\/strong\u003e 1,000 Ω including cable at 35 Vdc—adequate for long cable runs without signal degradation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 5 Hz to 6,000 Hz ±0, 3 dB captures most common vibration frequencies in industrial machinery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransmitter Weight:\u003c\/strong\u003e 0.43 kg (0.9 lbm)—compact footprint for mounting with DIN clips and screws (Mounting Option 03).\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThe unit is certified for CSA Division 2 hazardous locations (Agency Approval Option 01), making it suitable for use in potentially explosive atmospheres.\u003c\/p\u003e\u003ch2\u003eReal-World Applications\u003c\/h2\u003e\u003cp\u003eTypical installations include pumps, fans, compressors, and turbines where early detection of shaft radial vibration is essential. The 990-10-70-03-01's probe gap requirement of 0.5 to 1.75 mm (20 to 55 mils) from the target must be maintained during setup to ensure full-scale range. In a chemical plant, for example, mounting the transmitter on a centrifugal pump allows continuous monitoring. If the vibration exceeds the setpoint, the 4-20 mA loop reflects the change, and any NOT OK condition (e.g., probe failure) triggers the \u0026lt;3.6 mA signal, prompting immediate inspection.\u003c\/p\u003e\u003ch2\u003eInstallation \u0026amp; Setup Guidance\u003c\/h2\u003e\u003cp\u003eProper installation hinges on correct probe gap and secure mounting. Use the DIN clips and screws (included with the 03 mounting option) to attach the transmitter. The maximum cable length from the Proximitor Sensor Output (BNC connector) to the remote indicator is 3 meters (10 feet). For best noise immunity, run the cable separately from high-voltage lines. After mounting, adjust the zero and span using the non-interacting external adjustments while verifying the signal against a known target position. The probe gap must be set within 0.5-1.75 mm; using a feeler gauge or digital gap tool ensures accuracy.\u003c\/p\u003e\u003ch2\u003eTroubleshooting \u0026amp; Common Issues\u003c\/h2\u003e\u003cp\u003eWhen the 990-10-70-03-01 outputs a signal below 3.6 mA, the NOT OK\/signal defeat circuit has activated. Common causes include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProbe damage or cable break:\u003c\/strong\u003e Inspect the 3300 NSv probe and extension cable for physical wear or corrosion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower supply out of range:\u003c\/strong\u003e Verify that +12 to +35 Vdc is present at the transmitter terminals with a DMM.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcessive loop resistance:\u003c\/strong\u003e Ensure total loop resistance (including cable and receiver) does not exceed 1,000 Ω at 35 Vdc.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncorrect probe gap:\u003c\/strong\u003e Re-check the gap; if it has drifted, re-adjust using the zero\/span adjustments.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIf the output remains in defeat mode after correcting these, replace the probe or transmitter module. The 990-10-70-03-01's current limiting (23 mA typical) protects the loop from overcurrent. PLC Source PRO stocks the Bently Nevada 990-10-70-03-01 990 Vibration Transmitter and related accessories for fast replacement.\u003c\/p\u003e","brand":"Bently Nevada","offers":[{"title":"Default","offer_id":44416637730915,"sku":"990-10-70-03-01","price":222.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/8635\/0435\/files\/990-08-70-02-CN-1_bd6584cb-7b14-47b2-9b5a-1e6bf1693109.jpg?v=1785249289","url":"https:\/\/www.plcsourcepro.com\/products\/bently-nevada-990-10-70-03-01-industrial-automation-module","provider":"PLC Source PRO","version":"1.0","type":"link"}