Category: Bently

3500 Monitoring System

The 3500 is a full-feature monitoring system whose design incorporates the latest in proven processor technology.

In addition to meeting the above stated criteria, the 3500 adds benefit in the following areas:

• Enhanced operator information

• Improved integration to plant control computer

• Reduced installation and maintenance cost

• Improved reliability

• Intrinsic Safety (IS) option

The following sections discuss these benefits in more detail.

Enhanced Operation Information

The 3500 design includes features to both enhance the operator’s information

and present this information so that the operator may easily interpret it.

These features include:

• Improved data set

– Overall amplitude

– Probe gap voltage

– 1X amplitude and phase

– 2X amplitude and phase

– Not 1X amplitude

• Windows®-based Operator Display Software

• Data displayed at multiple locations

Monitoring and computerized vibration information systems provide the information

you need to assess the mechanical condition of rotating and reciprocating machinery.

These systems continuously measure and monitor various supervisory parameters

and provide crucial information for early identification of machinery problems such as imbalance,

misalignment, shaft crack, and bearing failures.

As such, these systems are an efficient and effective means of satisfying plant management,

engineering, and maintenance concerns for:

• Increasing plant safety by minimizing the occurrence of hazardous conditions or catastrophic failures.

• Improving product quality by minimizing process variances caused by improperly operating equipment.

• Maximizing plant availability by servicing only those machines that require it and providing more efficient turnarounds.

• Reducing plant operating costs by minimizing unplanned shutdowns and by making more efficient use of maintenance resources.

For protection of critical machinery, we highly recommend that you permanently install continuous monitoring systems.

The term “protection” means that the system can shut down machinery on alarm, without human interaction.

These systems include applicable transducers, each with its own dedicated monitoring circuitry and alarm setpoints.

The 3500 Monitoring System is the newest addition to the family of continuous monitoring systems offered by Bently Nevada, LLC.

Related Documents

For probe information, refer to the following

manuals:

n 3300 XL 8mm & 3300 5mm Proximity

Transducer System User Guide

(Document 141078)

n 3300 XL NSv Proximity Transducer System

User Guide (Document 147357)

n 3300 XL 11mm Proximity Transducer

System Installation User Guide

(Document 146255)

n Radiation Resistant Probe and Proximitor

System (Document TW8029407)

Sleeve length is determined by the location in

which the probe and housing are installed. The

probe lead must be longer than the sleeve.

Sleeve lengths longer than 304 mm (12 inches)

require additional sleeve support to reduce the

vibration associated with unsupported long sleeve lengths.

Bently Nevada offers a probe support and oil

seal (part number 37948-01) for long sleeves

that must go through an inner bearing

housing. We also make custom sleeve supports.

The 21000 and 24701 Proximity Probe Housing Assemblies are

available with Canadian Standards Association (CSA)

approvals. They are rated explosion proof for hazardous areas.

You can order hazardous area approved proximity probes

with 21000 aluminum and 24701 stainless steel housings for

intrinsically safe applications. Both housings

are certified as CSA Type 4 enclosures and are

fully compliant with the American Petroleum

Institute’s (API) 670 Standard for externally

mounted proximity probe housings.

The 164818 Compact Proximity Probe Housing is

also available for applications with space

restrictions. Ceramic capped probes are

available with the 164818 housing.

Sleeve length is determined by the location in

which the probe and housing are installed. The

probe lead must be longer than the sleeve.

Sleeve lengths longer than 304 mm (12 inches)

require additional sleeve support to reduce the

vibration associated with unsupported long sleeve lengths.

Bently Nevada offers a probe support and oil

seal (part number 37948-01) for long sleeves

that must go through an inner bearing

housing. We also make custom sleeve supports.

Description

To externally mount proximity probes, use one of these allmetal Proximity Probe Housing Assemblies:

l 21000 aluminum probe housing assembly

l 24701 stainless steel probe housing assembly

The 21000 and 24701 Proximity Probe Housing Assemblies

consist of the following parts:

l A dome cover that screws into the body of the housing

l Threaded ports for conduit connections

l A probe sleeve of optional length

l 0-rings

l A reverse mount proximity probe

l A thread seal

l Optional conduit fittings

l An optional standoff adapter

A newer 31000/32000 proximity probe housing

assembly is available with more flexible mounting

options, better environmental resistance, and other

improved features. We recommend this proximity

probe housing assembly for installations where an

explosion proof housing is not required. See 31000 and

32000 Proximity Probe Housings product datasheet

(document 141610).

The 200350 and 200355 Accelerometers contain a

piezoelectric sensing device, which generates charge

when subjected to vibration.  This charge is then

converted electronically to a differential voltage signal,

which is proportional to the acceleration that is parallel

to the sensitive axis of the transducer.

Most common machine malfunctions (unbalance,

misalignment, etc.) occur on the rotor and

originate as an increase (or at least a change) in

rotor vibration. For any individual casing

measurement to be effective for overall machine

protection, the system must continually transmit a

significant amount of rotor vibration to the

machine casing, or mounting location of the transducer.

In addition, be careful to install the accelerometer

transducer on the bearing housing or

machine casing. Improper

installation may decrease the

transducer amplitude and frequency

response and/or generate false

signals that do not represent actual

vibration. Refer to the appropriate

instruction manuals and Application Notes.

Upon request, Bently Nevada provides

engineering services that can identify

the appropriate machine housing

measurements and installation

assistance if needed.

Description

The 200350 and 200355 Accelerometers are general

purpose, case-mounted seismic transducers designed

for use with Trendmaster Pro Constant Current Direct

Input Card, part number 149811-02 and the Seismic

Direct Input Card, part number 164746-01.

The 200350 and 200355 Accelerometers are contained

within a hermetically sealed, stainless steel case.  The

design provides an extremely rugged transducer, well

suited for harsh industrial environments.  Each

transducer’s top mounted, 2-pin connector (MIL-C5015) allows for easy installation and removal of the

interconnecting signal cable.  A ¼-28 threaded hole on

the bottom of the casing accommodates multiple

mounting options.

Description

The 3300/05 rack is a durable, easy to access, expandable mounting medium for

the 3300 Monitoring System. It accommodates a Power Supply, System Monitor,

and various types of 3300 Monitors. Each monitor position in the rack includes a

Signal Input/Relay Module position at the rear of the rack. The rack mainframe is

manufactured in sections from an injection molded plastic; a conductive antistatic

material dissipates electrostatic discharge.

The rack bezel allows you to individually identify machine/monitor points or loop

numbers by using the factory engraved bezel tags or clear plastic strips over

paper tags. The 3300 modular design eliminates the need for internal rack

wiring and allows easy expansion to meet your increased monitoring

requirements.

The left-most position (position 1) of the rack is designated for the Power Supply.

The position next to the Power Supply (position 2) is reserved for the System

Monitor. The other rack positions (3 through 14) are available for any

combination of individual monitors.

Description

The Rack Interface Module (RIM) is the primary interface to the 3500 rack. It

supports a proprietary protocol used to configure the rack and retrieve

machinery information. The RIM must be located in slot 1 of the rack (next to the

power supplies).

The RIM supports compatible Bently Nevada external communications

processors such as TDXnet, TDIX, and DDIX. While the RIM provides certain

functions common to the entire rack, the RIM is not part of the critical monitoring

path and has no effect on the proper, normal operation of the overall monitoring

system. One RIM is required per rack.

For Triple Modular Redundant (TMR) applications, the 3500 System requires a

TMR version of the RIM. In addition to all the standard RIM functions, the TMR RIM

also performs “monitor channel comparison.” The 3500 TMR configuration

implements monitor voting using the setup specified in the monitor options.

Using this method, the TMR RIM continually compares the outputs from three (3)

redundant monitors. If the TMR RIM detects that the information from one of

those monitors is no longer within a configured percentof the information of the

other two monitors, it will flag that the monitor is in error and place an event in

the System Event List.

Applications that require a cable longer than 100 feet must use the External

Power Supply and Cable Adapter. Applications that use the back lighted Display

Unit must use the External Power Supply. There are two External Power Supplies:

one for connection to 115 Vac and the other for connection to 230 Vac.

The External Power/Terminal Strip Mounting Kit eases installation of External

Power Supplies. The External Power/Terminal Strip Mounting Kit is designed to fit

in the Independent Mount Housing. The Kit streamlines installation of an External

Power Supply in both the Independent Mount Housing or a user supplied housing.

Independent Mounting – display is mounted flush against a wall or

panel and located up to 100 feet away from the 3500 System. (Up to

4000 feet away from the 3500 System when using the External Power Supply). 

Up to two displays can be connected to each 3500 rack and each display

requires one empty 3500 rack slot for insertion of its corresponding DIM. When

the display is not face-mounted, the cable connection between the DIM and the

Display can be made from the front of the 3500 rack or from the I/O module at

the rear of the rack.