Conditions the 3300 NSv proximity signal into a 4 to 20 mA axial-position output for the machinery control system.
Product Overview
991-01-XX-02-00 identifies a Bently Nevada 991 thrust-transmitter configuration for axial position monitoring. The two-wire, loop-powered transmitter accepts a matched 3300 NSv probe and extension cable and produces a proportional 4 to 20 mA signal.
The submitted code contains XX placeholders in the system-length field. This draft preserves those characters and does not assign a 5 m or 7 m execution without the complete installed label.
Performance
Provides PROX OUT and COM diagnostic access plus a coaxial connector for dynamic signal and gap-voltage checks.
Uses non-interacting zero and span adjustments for controlled loop setup.
Drives the loop below 3.6 mA during a Not OK condition to prevent a misleading high output.
Technical Details
| Manufacturer | Bently Nevada, a Baker Hughes business |
|---|---|
| Submitted model | 991-01-XX-02-00 |
| Product type | Thrust transmitter |
| Measured variable | Axial displacement |
| Primary output | Two-wire 4 to 20 mA |
| Compatible transducer system | Matched 3300 NSv probe and extension cable |
| Full-scale field | 01 is not defined in the current 991 ordering table; verify label |
| System-length field | XX placeholder; verify 5.0 m or 7.0 m execution |
| Mounting option | 02 bulkhead screws |
| Agency approval option | 00 not required |
| Loop accuracy | Within plus or minus 1.5% of specified full-scale range, typical |
| Transmitter power | +12 to +35 VDC |
| Loop resistance | 1000 ohms maximum including cable at 35 VDC |
| Transmitter operating temperature | -35 to +85 degrees C |
System Integration
- Resolve both XX placeholders and the non-current 01 full-scale field from the physical label before quotation or installation.
- Match transmitter, probe and extension-cable system length and retain the complete 3300 NSv part numbers.
- Use shielded twisted-pair loop wiring and preserve the documented grounding and diagnostic-signal arrangement.
- Calibrate zero and span against the approved axial-position range and verify Not OK behavior before enabling alarms.
Applications
- Axial-position monitoring on centrifugal air compressors, small pumps, motors or fans.
- OEM machinery controls requiring a simple proportional 4 to 20 mA thrust signal.
- Installations using bulkhead mounting and a matched 3300 NSv transducer system.
FAQ
Can 991-01-XX-02-00 be ordered with the XX characters unchanged?
The placeholders do not identify a usable system length; provide the full transmitter label and matched probe and extension-cable records first.
Why does the 01 field in 991-01-XX-02-00 need review?
The current ordering table lists 06 and 25 full-scale options, so the submitted 01 field must be verified against the installed label or legacy record.
What companion hardware must match 991-01-XX-02-00?
Confirm the 3300 NSv probe, extension cable, total system length, target material and loop receiving input.
How should a 991-01-XX-02-00 loop be tested after replacement?
Verify supply and loop resistance, set zero and span, check PROX OUT and gap voltage, then prove Not OK and control-system alarming.
What information prevents a mismatched 991-01-XX-02-00 spare?
Send the complete transmitter, probe and extension-cable labels, full-scale range, mounting details and existing calibration record.
About IndustryParts
https://www.industryparts.com/Placeholder fields are resolved before transmitter selection
IndustryParts keeps 991-01-XX-02-00 on hold for exact label confirmation rather than assigning an unsupported range or system length.
- Submitted code preserved
- XX fields flagged
- Matched transducer requested
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