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Technical specifications for 990-04-50-01-00
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Manufacturer:Bently Nevada
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Product Category:Machinery Monitoring Systems
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Spare Part Number:990-04-50-01-00
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Estimated shipping dimensions:9.9x7.3x6cm
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Weight:0.46 kg
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Tariff Code:8537101190
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Counliy of origin:USA
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Full-scale vibration range:0 to 100 um peak-to-peak
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System length:5.0 m
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Mounting:35 mm DIN rail clips
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Agency approval option:Not required
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Input channels:1
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Accepted transducer:3300 NSv proximity probe and extension cable
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Supply voltage:+12 to +35 Vdc
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Loop output:4 to 20 mAdc, 2-wire
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Loop accuracy:+/-1.5% of full scale
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Probe operating gap:0.5 to 1.75 mm
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Maximum loop resistance:1000 Ohm at 35 Vdc
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Current limiting:23 mA typical
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Not-OK output:Less than 3.6 mA within 100 us
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Power-up inhibit:2 to 3 s
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Prox Out impedance:10 kOhm for 10 MOhm load
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Prox Out linear range:1.4 mm
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Prox Out scale factor:7.87 mV/um typical
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Frequency response:5 Hz to 6000 Hz, +0/-3 dB
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Minimum target diameter:9.5 mm
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Maximum Prox Out cable:3 m
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Transmitter operating temperature:-35 to +85 degC
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Transmitter storage temperature:-52 to +100 degC
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Relative humidity:100% condensing, non-submerged
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Probe cable:75 Ohm coaxial, FEP insulated
Information
Overview
Manuals
Common Applications
Product Precautions
Bently Nevada 990-04-50-01-00 is a DIN-rail 990 Vibration Transmitter configured for a 5 m 3300 NSv system and a 0–100 um peak-to-peak range. It sends proportional shaft-vibration data to a control system over a two-wire 4–20 mA loop.
- Converts proximity-probe vibration into a two-wire 4–20 mA loop
- Scales peak-to-peak shaft vibration for direct control-system acquisition
- Provides a diagnostic Prox Out connection and a test input
- Suppresses the loop below 3.6 mA when the transducer circuit is Not OK
990-04-50-01-00 installs with 3300 NSv proximity probe, 3300 NSv extension cable, 24 Vdc-class loop supply, control-system analog input in an engineered 990 Vibration Transmitter System configuration.
The commissioning workflow covers installed-hardware matching, controlled start-up and functional verification for this 990 vibration transmitter.
Important Notice: Confirm the complete 990-04-50-01-00 marking, installed-system configuration, field connections and controlled functional test before commissioning or replacement.
Apter Power 990-04-50-01-00 Manuals and Guides
Apter Power 990-04-50-01-00 Product Technical Reference PDFBently Nevada 990-04-50-01-00 Official Manual PDF
The first document is an Apter Power model-specific technical reference. The second supports model-specific installation, configuration and engineering verification.
Pump shaft-vibration trendingConverts proximity-probe vibration into a two-wire 4–20 mA loop
Compressor proximity monitoringScales peak-to-peak shaft vibration for direct control-system acquisition
DCS vibration inputProvides a diagnostic Prox Out connection and a test input
Condition-monitoring diagnostic test pointSuppresses the loop below 3.6 mA when the transducer circuit is Not OK
Read the applicable Bently Nevada installation instructions before work. Verify 990-04-50-01-00 and the installed 990 Vibration Transmitter System configuration.
1Confirm 990-04-50-01-00 and the 0–100 um full-scale range before loop work.
2Isolate the loop supply and process input before removing the DIN-rail transmitter.
3Verify the installed probe and extension cable form the specified 5.0 m NSv system.
4Gap the probe within the documented operating region before zero/span adjustment.
5Keep loop resistance within the limit established by the actual supply voltage.
6Use the signal-isolation adapter when grounded AC-powered equipment is connected to Prox Out.
7Confirm the Not-OK state drives the loop below 3.6 mA and clears after recovery.
8Prove vibration scaling and control-system response before returning the loop to service.
Technical notes
Set zero and span only after the 5 m NSv probe system is correctly gapped, then verify the two-wire loop across the actual load. Use isolated portable equipment at Prox Out when the test instrument is grounded.
FAQ View All FAQ
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What vibration range does 990-04-50-01-00 transmit?Full-scale option 04 represents 0 to 100 micrometres peak-to-peak.
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Which proximity system length is required by 990-04-50-01-00?System-length option 50 requires a 5.0 m 3300 NSv probe and extension-cable combination.
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How is 990-04-50-01-00 mounted?Mounting option 01 supplies 35 mm DIN-rail clips.
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What loop supply can be used with 990-04-50-01-00?The transmitter requires +12 to +35 Vdc at its terminals and drives a two-wire 4–20 mA loop.
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What indicates a Not-OK condition from 990-04-50-01-00?The output drops below 3.6 mA after a detected Not-OK condition and recovers after the fault clears.
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How should the probe for 990-04-50-01-00 be gapped?Set the NSv probe between 0.5 and 1.75 mm from the target so the selected full-scale range remains available.
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Can grounded test equipment connect directly to the Prox Out of 990-04-50-01-00?Use the manufacturer-specified isolation adapter when grounded AC-powered test equipment is connected to Prox Out.
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What tests are required after replacing 990-04-50-01-00?Check loop supply, burden, probe gap, zero/span, Not-OK action, Prox Out response and control-system scaling.
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