Bently Nevada 990-05-XX-03-CN 104M1359-01 Vibration Transmitter

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Manufacturer: Bently Nevada
Product No.: 990-05-XX-03-CN
Country of origin:United States
Product Type: Vibration Transmitter
Barcode: 8537101190
Payment: T/T, Western Union
Weight: 460g
Dimensions: 9.8cm x 7.3cm x 6cm
Shipping port: Xiamen
Warranty: 12 months

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Description

The 990-05-XX-03-CN (Internal Part Number: 104M1359-01) is an industrial, loop-powered 990 Vibration Transmitter engineered by Bently Nevada (a Baker Hughes business) to deliver continuous machinery condition tracking directly to plant control systems. This integrated field unit combines the signal-conditioning electronics of a proximity sensor and a transmitter into a single, space-saving package. It accepts inputs from a non-contacting 3300 XL 8mm eddy-current proximity probe and extension cable system, converting dynamic shaft micro-gap variations into a linear 4 to 20 mA analog current loop. This direct interface allows plant operators to route critical vibration data straight into Programmable Logic Controllers (PLC) or Distributed Control Systems (DCS) without the need for a separate rack-based monitoring monitor.

The exact hardware configuration 990-05-XX-03-CN features a factory-calibrated full-scale measurement scale of 0-5 mils pp (0-125 um pp), optimized for monitoring radial shaft vibration amplitudes. It is equipped with a Bulkhead Coaxial Connector Mounting Option, ensuring a high-integrity mechanical and electrical anchor through junction box enclosures or field bulkheads. Certified with the CN agency approval designation, this module complies with global safety frameworks, including ATEX/IECEx and local Chinese NEPSI hazardous area regulations. The part number 104M1359-01 represents the modern OEM manufacturing assembly designation, incorporating upgraded high-stability surface-mount components and improved RFI/EMI shielding over older product iterations while maintaining identical physical and electrical drop-in backward compatibility.

Features

Two-wire loop-powered configuration providing a direct 4 to 20 mA proportional current output to DCS/PLC automation cards.
Standardized 0-5 mils peak-to-peak (0-125 um peak-to-peak) linear scale calibration for precision shaft vibration logging.
Robust bulkhead coaxial mounting arrangement for secure structural installation through panel or enclosure walls.
Dual hazardous zone certifications matching global ATEX/IECEx standards with local Chinese NEPSI industrial markings.
Modern 104M1359-01 component build featuring enhanced noise immunity and thermal stability in harsh processing zones.
Front-mounted isolated BNC dynamic terminal providing raw, unconditioned voltage waveforms for on-site diagnostic analyzers.
Independent non-interacting zero and span adjustment pots allowing seamless calibration verification under field conditions.

Applications

Standalone radial shaft vibration monitoring on fluid-filmed bearings of industrial process fans and blowers.
Direct asset protection loop integration for medium-sized balance-of-plant electric motors and centrifugal pump skids.
Distributed machinery monitoring inside remote oil and gas transport pipeline stations or water utility infrastructure.

Option String Breakdown

Option Code Slot	Selected Option Value	Technical Detail
Model Number	990	990 Vibration Transmitter Product Family
A: Full-scale Option	-05	0-5 mils peak-to-peak (0-125 um peak-to-peak) scale
B: System Length Option	-XX	Configurable system loop length (Matches probe/cable parameters)
C: Mounting Option	-03	Bulkhead coaxial connector mounting layout
D: Agency Approval	-CN	Combined ATEX/IECEx and Chinese NEPSI hazardous area approvals
Internal Part Number	104M1359-01	Modern factory production assembly code

Technical Specifications

Parameter	Detail
Manufacturer	Bently Nevada (Baker Hughes)
Ordering Code	990-05-XX-03-CN
OEM Assembly Part ID	104M1359-01
Product Category	Two-Wire Proximity Vibration Transmitter
Linear Scale Range	0 to 5 mils pp (0 to 125 um pp) displacement amplitude
Output Loop Signaling	Proportional 4 to 20 mAdc current loop
Buffered Output Impedance	10 kohm nominal (Protected against continuous short circuit faults)
Buffered Output Scale Factor	Nominal 7.87 V/mm (200 mV/mil) corresponding to the raw probe gap
Supply Voltage Window	+12 Vdc to +35 Vdc loop power required at the termination interface
Transducer Matching Loop	Calibrated for 3300 XL 8mm proximity probe and extension cable loops
Field Wiring Block Capacity	Accepts wire gauges up to 1.5 mm squares (16 to 24 AWG) solid or stranded
Enclosure Construction Material	Polycarbonate body integrated with an anodized aluminum base plate
Net Hardware Weight	0.43 kg (0.9 lbm) typical
Operating Temperature Bounds	-35 degC to +85 degC
Storage Temperature Bounds	-51 degC to +100 degC
Relative Humidity Limits	95% maximum, non-condensing atmosphere constraints

Connections/Interfaces

Termination Point	Function Assignment
PROBE	Miniature coaxial connection port receiving the incoming transducer extension cable
+ (SIG)	Positive current loop terminal receiving incoming +12 to +35 Vdc loop power
- (COM)	Negative current loop connection returning the regulated 4 to 20 mA measurement tracking
BUF	Front-panel isolated BNC dynamic port providing unconditioned sensor voltage waves

Installation Guidelines

Bulkhead Mount Assembly: Secure the transmitter body through the enclosure wall panel or custom bulkhead interface plates using the integrated mechanical thread mounts to ensure a clean, rattle-free anchor.
Electrical Ground Isolation: Verify that the transmitter housing base plate remains electrically isolated from structural cabinet metals. This isolation blocks raw loop noise and prevents ground currents from corrupting vibration waveforms.
System Length Synchronization: Check that your specified system length option (Option -XX) perfectly matches the total physical length of the attached 3300 XL 8mm probe and extension cable to maintain calibrated accuracy.
Dynamic Signal Diagnostics: Connect vibration data collectors directly to the front-facing BNC socket for diagnostics. This isolated port outputs raw data (200 mV/mil) without affecting or interrupting the primary 4-20 mA control loop signaling.

Key Features:

How does a 4-20 mA loop-powered vibration transmitter handle a 'Probe NOT OK' condition on its current loop?

When the transmitter detects a hardware failure—such as a severed probe lead, a shorted extension cable, or a sensor gap that exceeds the calibrated linear range—the internal diagnostic logic overrides the vibration loop processing. It clamps the loop current to a distinct fault state (typically dropping it below 3.6 mA or raising it above 22.0 mA), allowing the connected PLC or DCS to immediately recognize a sensor fault rather than mistaking it for zero vibration.

What is the maximum allowable loop resistance for a 990 transmitter operating on a +24 Vdc power supply loop?

The maximum allowable loop resistance is governed by the minimum operating voltage threshold of the transmitter (typically 12 Vdc). For a standard +24 Vdc supply loop, the maximum voltage drop allowed across the field wiring and receiver input resistor is 12 V (24V - 12V). Based on a maximum loop fault current of 22 mA, the maximum total loop resistance is calculated as R = V / I = 12V / 0.022A, which equals approximately 545 ohms. Exceeding this resistance will cause the transmitter output to clip prematurely at higher vibration levels.

Why is the field-calibration of non-interacting zero and span controls necessary on a transmitter if it is factory-pre-calibrated?

While the transmitter is factory-calibrated to a standard AISI 4140 steel target, actual field variables can skew the baseline measurements. Minor variations in the target material metallurgy, shaft curvature, or the impedance of unusually long field wiring runs can cause small offsets. The non-interacting zero and span pots allow field engineers to adjust the 4 mA baseline and 20 mA full-scale output to match the precise mechanical geometry and material characteristics of the local machine shaft without shifting the underlying linearity curve.

Global Express Shipping

Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).

For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

Color pattern	Greyish White
Country of origin	United States

Bently Nevada 990-05-XX-03-CN 104M1359-01 Vibration Transmitter