Beta 450 Manuel d'utilisateur télécharger pdf

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OVERVIEW

Metrix 440 and 450 electronic vibraon switches provide eco-

nomical, self-contained, single-channel vibraon protecon. The

440 switch is suitable for use in non-hazardous as well as Class I

Div 2 hazardous areas. The 450 switch ulizes the same internal

electronics as the 440, but features explosion-proof enclosure

styles suitable for Class I Div 1, Class II Div II, and Class III hazard-

ous areas.

Opons are available for electronic (triac or FET) or electro-

mechanical relay outputs, allowing the switch to be used in an

auto-shutdown circuit that trips the machine under high vibra-

on condions. SR versions provide a single alarm setpoint and

corresponding discrete output. DR versions provide two inde-

pendent alarm setpoints and corresponding discrete outputs,

allowing implementaon of ALERT (pre-shutdown) and DANGER

(shutdown) levels. A separate 4-20 mA proporonal output is

also provided on all switch models, allowing connecon to PLCs,

DCSs, strip chart recorders, or other process control systems

where vibraon levels can be trended.

Vibraon on both switches is monitored in RMS velocity units.

The standard conguraon consists of an internal accelerometer

mounted inside the switch housing, providing completely self-

contained funconality. The switch may also be congured to

use an external accelerometer if desired.*

* NOTE: Hazardous area approvals are not available when an external

sensor is used with the model 440. Consider models 450 or SM6100

instead, which are approved for use in hazardous areas with a variety of

external sensor types when Metrix sensor housing 7295 and explosion-

proof wiring pracces are used.

APPLICATIONS

Vibraon switches are an aracve soluon when all of the fol-

lowing criteria apply:

• Only one or two measurement points are required on a

machine.

• A fully self-contained approach is desired or required (sens-

ing element, signal condioning, alarming, and outputs).

• Sucient room exists to mount a vibraon switch on the

machine in the correct locaon and in the correct orienta-

on such that the vibraon levels indicave of machinery

malfuncons will actually be measurable at the switch

mounng locaon.

• The features of a mul-channel monitoring system are not

necessary and cannot be nancially jused.

• A 4-20mA vibraon transmier is undesirable or impraccal

because a PLC, DCS, SCADA system, or other instrumenta-

on is not available for monitoring the transmier signal.

In situaons where one or more of these criteria cannot be met,

Metrix oers other soluons that may be more appropriate,

such as vibraon transmiers and single-channel monitors that

accept an external sensor.



Datasheet



The 440 switch is CSA approved for Class

I Div 2 Groups B,C,D hazardous areas. Its

enclosure carries a NEMA 4X rang and

uses a 3-hole mounng paern.



The 450 switch has the same internal

electronics as the 440, but uses an explo-

sion-proof enclosure for CSA-approved

use in Class I Div1 Groups B,C,D, Class II

Div 1 Groups E,F,G, and Class III areas. The

standard enclosure (4-hole mounng pat-

tern) is available with a solid cover with

NEMA 4. The alternate enclosure (2-hole

mounng paern) is available with a win-

dow cover with NEMA 3, 4, 4X.

440 NEMA 4X

ENCLOSURE

450 (STANDARD

EXPLOSION PROOF

NEMA 4 ENCLOSURE,

SOLID COVER)

450 (ALTERNATE EXPLOSION

PROOF NEMA 3, 4, 4X

ENCLOSURE, WINDOW COVER)



440/450 electronic vibraon switches are intended for general-

purpose seismic vibraon measurements on a wide range of

rotang and reciprocang machinery with rotave speeds

between 120 rpm and 6,000 rpm. Seismic measurements are

parcularly well-suited for machines that incorporate rolling-

element bearings because sha vibraon in such machines is

usually transmied directly through the bearing to the bearing

housing, without substanal damping or aenuaon. Seismic

transducers can also measure vibraon that does not originate

at the sha, such as bearing-related wear and defects, foong/

foundaon problems, piping resonances that are coupled to the

machine, etc. Metrix does not recommend seismic measure-

ments as the sole means of protecng machinery with uid-

lm bearings where the sha vibraon many not be faithfully

transmied to the measurement locaon. Thought should be

given to the ecacy of such a monitoring strategy before relying

substanally or solely upon seismic measurements.

1 2 3 4 5 6 7 8 9 10

Résumé du contenu

Page 1 - Datasheet

www.metrixvibraon.com • info@metrixvibraon.com • 281.940.1802Doc# 1004730 • Rev G (October 2014) Page 1 of 10 OVERVIEWMetrix 440 and 450 electronic

Page 2 - FEATURES AND BENEFITS

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Page 3

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Page 4 - SPECIFICATIONS

www.metrixvibraon.com • info@metrixvibraon.com • 281.940.1802Doc# 1004730 • Rev G (October 2014) Page 3 of 10 vibraon signal. RMS is a good choice

Page 5

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Page 6 - 

www.metrixvibraon.com • info@metrixvibraon.com • 281.940.1802Doc# 1004730 • Rev G (October 2014) Page 5 of 10  Opons for:• 100-130 VAC,

Page 7 - 

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Page 10

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