Murphy EVS-S-EX Switch User Manual


 
05062
05-05-06
Section 20
In order to consistently bring you the highest quality, full featured products, we reserve the right to change our specifications and designs at any time.
MURPHY, the Murphy logo, TTD
, Centurion
or Millennium
and VS2
are registered and/or common law trademarks of Murphy Industries, Inc. This
document, including textual matter and illustrations, is copyright protected by Murphy Industries, Inc., with all rights reserved. (c) 2006 Murphy Industries, Inc.
Electronic Vibration Switch (EVS)
Also available, optional internal battery powered
EVS switch model, designed for use on
ignition powered systems.
Features
Piezoelectric-crystal internal sensor with
built-in microelectronics for reduced noise
sensitivity
Electronically integrated output signal that
measures and trips on velocity
Adjustable calibrated set-point controls
Shutdown set-point measured in velocity
Optional 4-20 mA output for continuous
monitoring capability
Solid-state outputs for setpoint trip
Adjustable time delay to prevent false
tripping on high-vibration start-ups or non-
repetitive transient events
Self-test and calibration
The Electronic Vibration Switch (EVS)
protects against equipment failure by monitoring velocity-based vibration
levels and providing an early warning or shutdown when abnormal vibration is detected.
The EVS product can be connected to Murphy’s TTD
annunciator, Centurion
or Millennium
controllers for
increased functionality. It also complements Murphy’s VS2
shock and excessive vibration/pulsation switch, which
is designed to detect an abnormal shock or pulsation due to equipment failure and to shutdown other equipment in
a system to prevent further damage.
The EVS product can be used on any equipment
where abnormal vibration could lead to equipment
damage, including:
Cooling fans
Engines
Pumps
Compressors
Gear boxes
Motors
Generator sets
The EVS product can monitor and alert the
operator of abnormal vibration caused by a
variety of possible factors, including:
Imbalance and misalignments
Defective sleeve bearings
Broken tie down bolts
Defective ball or roller bearings
Gear mesh
Blade pass frequencies
Detonation
Broken parts
EVS Product Table
Model Power Bandwidth Analog Out Area Classification*
EVS-S 24 VDC 6-500Hz No CL I, Gr C,D, Div 2
EVS-A 24 VDC 6-500Hz Yes CL I, Gr C,D, Div 2
EVS-SB Internal Battery 6-350Hz No CL I, Gr C,D, Div 2
EVS-S-EX 24 VDC 6-500Hz No CL I, Gr C,D, Div 1
EVS-A-EX 24 VDC 6-500Hz Yes CL I, Gr C,D, Div 1
*Submitted for approval