Bently Nevada 990-05-70-03-05 990 Transmetteur de vibration

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Fabricant : Bently Nevada
N° de produit : 990-05-70-03-05
Pays d'origine :États-Unis
Type de produit : Transmetteur de vibration
Code-barres : 8537101190
Paiement : Virement bancaire, Western Union
Poids : 820g
Dimensions : 53,3 mm x 73,9 mm x 100,1 mm
Port d'expédition : Xiamen
Garantie : 12 mois

Description

The 990 Vibration Transmitter is a two-wire, loop-powered vibration monitoring device designed for centrifugal air compressors, pumps, motors, and fans requiring a proportional 4 to 20 mA vibration output for machinery control systems. Bently Nevada developed this transmitter primarily for OEM machinery integration where continuous vibration trending and basic protection functions are required.

The transmitter accepts input from a 3300 NSv proximity probe and matching extension cable system. It conditions the probe signal into a peak-to-peak vibration amplitude signal and transmits a proportional 4 to 20 mA output to PLC, DCS, or other automation control systems.

The integrated Proximitor sensor design eliminates the need for an external proximitor module, simplifying installation in compact machinery areas with limited mounting clearance. The unit also provides a non-isolated PROX OUT signal for machinery diagnostics and waveform analysis.

The 990-05-70-03-05 configuration includes a 7.0 m transducer system length, DIN rail and screw mounting hardware, and hazardous area approvals suitable for Division 2 and ATEX installations.

Features

Integrated Proximitor sensor design
Two-wire loop-powered transmitter
4 to 20 mA proportional vibration output
Compatible with 3300 NSv proximity probe systems
Non-isolated PROX OUT diagnostic signal
External zero and span adjustments
DIN rail clip and screw mounting support
Signal defeat function during NOT OK conditions
High humidity resistance up to 100% condensing
Compact installation for centrifugal machinery applications
Frequency response from 5 Hz to 6000 Hz
CSA Division 2 and ATEX hazardous area approvals
ABS maritime approval included

Applications

Centrifugal air compressors
Industrial pumps
Electric motors
Process fans and blowers
OEM rotating equipment packages
General machinery vibration monitoring
PLC and DCS vibration trending systems
Skid-mounted rotating equipment
Compact machinery installations
Hazardous area vibration monitoring systems

Ordering Information

Model Code	Description
990	Vibration Transmitter
-05	0-5 mils pp (0-125 um pp)
-70	7.0 metres (23.0 feet)
-03	DIN clips and screws
-05	CSA Division 2, ATEX Zone 0, ATEX Zone 2 and ABS maritime approval

Technical Specifications

Category	Specification
Manufacturer	Bently Nevada
Product Model	990-05-70-03-05
Product Type	990 Vibration Transmitter
Country of Origin	U.S.A
Input Type	3300 NSv Proximity Probe and Extension Cable
Power Supply	+12 to +35 Vdc
Signal Output	4 to 20 mAdc
Configuration	2-wire loop-powered
Loop Accuracy	+/-1.5% full scale
Maximum Loop Resistance	1000 Ohm at 35 Vdc
Current Limiting	23 mA typical
Frequency Response	5 Hz to 6000 Hz (+0, -3 dB)
Probe Gap Range	0.5 to 1.75 mm
Prox Out Output Impedance	10 kOhm
Prox Out Linear Range	1.4 mm
Incremental Scale Factor	7.87 mV/um (200 mV/mil) +/-6.5% typical
Temperature Stability	Within +/-10% from 0 degC to +70 degC
Minimum Target Size	9.5 mm diameter
Maximum Diagnostic Cable Length	3 m
Operating Temperature	-35 degC to +85 degC
Storage Temperature	-52 degC to +100 degC
Probe Operating Temperature	-52 degC to +177 degC
Probe Storage Temperature	-52 degC to +177 degC
Relative Humidity	100% condensing, non-submerged
Probe Tip Material	Polyphenylene sulfide (PPS)
Probe Case Material	AISI 303 or 304 stainless steel
Probe Cable Type	75 Ohm coaxial FEP insulated
Optional Cable Armor	Flexible AISI 302 stainless steel
Tensile Strength	222 N maximum
Dimensions (H x W x D)	53.3 mm x 73.9 mm x 100.1 mm
Body Height	42.6 mm
Mounting Hole Distance	63.5 mm x 69.9 mm
Mounting Hole Diameter	5.8 mm
Transmitter Weight	0.43 kg
Total System Weight	0.82 kg

Connections/Interfaces

Connector Pin	Function
PROX OUT	Dynamic vibration and gap voltage output
COM	Common reference terminal
TEST Input	Loop signal verification input
4-20 mA Loop	Process control system output
Power Input	+12 to +35 Vdc supply

Installation Guidelines

Install the transmitter in a dry industrial enclosure with proper grounding.
Maintain probe gap between 0.5 mm and 1.75 mm during commissioning.
Use shielded cable routing practices to minimize EMI and RFI interference.
Separate signal wiring from high-voltage motor cables.
Use the supplied DIN clips or mounting screws for secure installation.
Protect coaxial connectors from moisture ingress in high-humidity environments.
Use the 122115-01 Test Adapter when connecting grounded AC-powered diagnostic equipment.
Verify loop resistance does not exceed 1000 Ohm at 35 Vdc.
Avoid excessive probe thread engagement beyond recommended limits.
Ensure hazardous area installation follows applicable local electrical regulations.

Compliance and Certifications

Certification	Description
CSA Division 2	Hazardous area approval
ATEX Zone 0	Hazardous area approval
ATEX Zone 2	Hazardous area approval
ABS	Maritime approval

FAQ

What is the primary function of the 990 transmitter?
It converts proximity probe vibration signals into a proportional 4 to 20 mA output for machinery monitoring systems.

Which probe system is compatible with this transmitter?
The unit supports Bently Nevada 3300 NSv proximity probes and matching extension cables.

Can the transmitter provide dynamic vibration signals?
Yes. The PROX OUT connector provides a dynamic transducer signal for diagnostics.

Is the transmitter loop powered?
Yes. It operates as a two-wire loop-powered device.

What is the supported frequency range?
The frequency response is 5 Hz to 6000 Hz.

Can this unit be used in hazardous areas?
Yes. This configuration includes CSA Division 2 and ATEX approvals.

Does the transmitter require an external proximitor module?
No. The Proximitor sensor is integrated into the transmitter.

What is the required supply voltage?
The operating supply range is +12 to +35 Vdc.

How does the NOT OK function operate?
The output drops below 3.6 mA when a probe fault or signal issue occurs.

What mounting methods are supported?
The unit supports DIN rail mounting and screw mounting.

Can the 4-20 mA signal be used for vibration phase analysis?
No. The analog output only provides peak-to-peak vibration trending data.

What diagnostic equipment requires the test adapter?
Grounded AC-powered oscilloscopes and analyzers should use the 122115-01 Test Adapter.

What humidity level can the transmitter withstand?
The transmitter supports 100% condensing humidity in non-submerged conditions.

What is the maximum diagnostic cable distance from PROX OUT?
The recommended maximum cable distance is 3 meters.

Is the transmitter suitable for System 1 diagnostics?
No. It is intended for overall vibration trending rather than full dynamic diagnostic systems.

Key Features:

#990 Vibration Transmitter #Vibration Transmitter

Product Documentation

Technical Datasheet (PDF) Complete specifications and technical drawings.

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