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00-02-0841

2013-01-14

Section 20

EVS-2



Electronic Vibration Switch

Installation and Operations Manual

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Содержание EVS-2

Страница 1: ...00 02 0841 2013 01 14 Section 20 EVS 2 ElectronicVibrationSwitch Installation and Operations Manual ...

Страница 2: ...on is to be done only by qualified technician according to the National Electrical Code Observe all Warnings and Cautions at each section in these instructions Please contact FW MURPHY immediately if you have any questions FW MURPHY has made efforts to ensure the reliability of the Electronic Vibration Switch EVS 2 and to recommend safe usage practices in system applications Please note that in an...

Страница 3: ... 3 Mounting 3 Mounting Options 4 Bracket Proposals 5 Mounting Examples 5 Plug Options 6 Wiring 6 Settings 10 Setting the Set Point in Inches Per Second IPS Peak 10 Setting of Alarms 13 Vibration Limits Based on Class of Equipment Based on ISO 10816 3 14 Equipment Manufacturer Recommended Settings 16 Specifications 17 ...

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Страница 5: ...ectric crystal internal sensor with built in microelectronics for reduced noise sensitivity Electronically integrated output signal that measures and trips on velocity IPS peak Two independently adjustable output channels Shutdown setpoint measured in velocity IPS peak 4 20 mA output for continuous monitoring capability Solid state outputs for setpoint trip Adjustable time delay to prevent false t...

Страница 6: ...and Yellow LED indicators representing these two channels are illuminated during normal use When a fault is activated the LED indicators will turn off IMPORTANT Because the EVS 2 resets automatically when the vibration level returns below the set point it is important to ensure that the fault has been addressed before restarting the equipment 1 Red Channel 2 LED K2 2 Spring terminal 16 24 AWG 3 Ch...

Страница 7: ...sing a mounting bracket ensure that mounting surfaces are smooth and flat Care must also be taken that the mounting surface is not subject to natural vibrations Using a high stiffness mounting surface prevents natural vibrations which cause measurement errors WARNING Exceeding the torque specification will damage the aluminum housing If there is concern of the device becoming loose due to excessiv...

Страница 8: ...mounting options for the EVS 2 using a simple pipe plug welded to the machine surface or a bracket with the special adapter provided for drilled and tapped surface mount NOTE The special adapter is available for sale Also note that a hollow pipe close nipple is NOT recommended for installations ...

Страница 9: ...t Proposals Mounting Examples Legend C Compressor E Engine Compressor Cx Compressor Crankshaft endplay Cy Main Bearings Rod Bearings Cz Main Bearings Engine Ex Engine Crankshaft endplay Ey Main Bearings Ez Main Bearings Detonation Rod Bearings ...

Страница 10: ...idity or moisture Murphy recommends using an SO type cable along with a Div 2 suitable rain tight CGB Gland Strain relief fitting No stress should be possible on the wiring to the terminal block If such protection is not provided by the conduit system some form of stress relief must be installed WARNING Certification compliance requires the use of a cable gland and strain relief fitting To assure ...

Страница 11: ...ts for Channel 1 K1 and Channel 2 K2 are present on terminals 3 through 8 NOTE On initial power up Relays do not activate until the 4 20mA reading settles below the trip point for the corresponding channel Ex If Channel 1 is set at 50 the Relay will not activate on power up until the 4 20 settles below 12mA This could take approximately 7 seconds If the trip point is higher 90 then it will take le...

Страница 12: ...Section 20 00 02 0841 2013 01 14 8 Figure 3 EVS 2 Hook up showing only how to wire Channel 1 K1 ...

Страница 13: ...Section 20 00 02 0841 2013 01 14 9 Figure 3 EVS 2 Hook up continued ...

Страница 14: ...ettings Setting the Set Point in Inches Per Second IPS Peak NOTE The unit must be set per the application upon installation Factory Settings 1 5 IPS 1 sec time delay 50 limit value Figure 4 EVS 2 Detail for setting IPS and Delay Set points ...

Страница 15: ...crease the Vibration Set Point turn the potentiometer counter clockwise Make sure that the machine to be monitored is powered on and in normal operation Determining Adjusting the Delay Setpoint 1 or 5 Seconds The Delay Setpoint value can define the line between sensitivity and nuisance faults A 1 second delay allows a potentially catastrophic failure to be detected quickly A 5 second delay helps p...

Страница 16: ...tion based on the scale set in DIP switches 2 through 4 These pots adjust to a percentage of the scale range chosen If 0 to 1 5 IPS is selected as the range then a pot setting of 50 would cause the EVS 2 to trip at a vibration of 0 75 IPS Figures 5 and 6 illustrate these pot settings for the EVS 2 Figure 5 Figure 6 ...

Страница 17: ...d baseline for example with a new machine the initial alarm setting should be based either on experience with other similar machines or relative to agreed acceptance values After a period of time the steady state baseline value will be established and the alarm setting should be adjusted accordingly Recommended Alarm Settings The following are guidelines based on industry standards Actual settings...

Страница 18: ...Section 20 00 02 0841 2013 01 14 14 Vibration Limits Based on Class of Equipment Based on ISO 10816 3 Figure 7 Vibration Limits ...

Страница 19: ...r Sets Electric Driven 0 2 0 3 Generator Sets Engine Driven 0 5 0 7 Machine Tools unloaded 0 05 0 2 Pumps Centrifugal 0 1 0 3 Pumps Gear 0 1 0 3 Pumps Reciprocating 0 5 0 7 Turbines 0 05 0 2 Reciprocating Compressor Vibration Setting Guidelines THE VALUES LISTED BELOW ARE GUIDELINES ONLY Cyclical failures generally occur in the range of 10 to 100 cycles High velocity at high frequency will result ...

Страница 20: ...riel equipment THESE VALUES ARE GUIDELINES ONLY Actual vibration limits must be related to stress levels which can be measured with strain gage equipment In general if vibration levels are below the guidelines mentioned below the stress levels are well below the fatigue level of the equipment Model JG A M N P Q R W JGJ H E T K JGC D B V Skid 0 10 IPS 0 15 IPS 0 20 IPS Compressor Frame 0 20 IPS 0 4...

Страница 21: ... T6 Ex tD A21 T 100 C Cable Connection NPT IP66 IRA 06 ATEX 1188 X SIRA 07 ATEX 4327 X Electrical Sensor Type Accelerometer Power Required 20 to 30 VDC Current Draw 40 mA Electrical Connectors Spring Terminals Relay Switch Contact Capacity 30 VDC 1A 150 VAC 0 46 A Relay Function Non Latching Threshold Set Point 10 to 100 of Alarm Set Point Normally Energized NE Fail Safe Time Delay Adjust DIP Swit...

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