SKF Machine Condition Transmitter (MCT) User Manual
Contents
1. SKF Machine Condition Transmitter MCT CMSS500 A Series User Manual Part No 32031400 EN Revision C User Manual Copyright 2007 by SKF Reliability Systems All rights reserved 5271 Viewridge Court San Diego CA 92123 1841 USA Telephone 858 496 3400 Fax 858 496 3531 Customer Service 1 800 523 7514 SKF Reliability Systems 5271 Viewridge Court San Diego California 92123 USA Telephone 858 496 3400 FAX 858 496 3531 For technical support contact TSG Americas skf com or TSG EMEA skf com for customers in EMEA region Europe Middle East and Africa Visit us at our web site www skf com cm SKF Patents include US05854553 US05845230 US06489884 US05679900 US04 768380 US06199422 US05992237 US06202491 US06513386 US06275781 US06633822 US06006164 US2003_0178515A1 US6 789 025 US6 789 360 W0_03_048714A1 SKF is a registered trademark of the SKF Group 010207 SKF Reliability Systems Limited Warranty WARRANTY Subject to the terms and conditions contained herein SKF warrants to the Buyer that for the warranty period indicated below the products sold by SKF that are listed below the Products when properly installed maintained and operated will be free from defects in material and workmanship and shall be fit for the ordinary purposes for which the Products are designed BUYER S LIMITED REMEDIES This limited warranty defines SKF s sole and exclusi2. 4 20 mA 1 1 5 2 4 20 mA Output 2 14 A Alarm Delays 3 4 Alarm Relays 3 8 Alarm Setpoints 3 1 B band pass filters 2 16 BNC connector 1 3 2 15 3 1 BOV 2 15 Buffered Output 2 15 C CE Installation 5 1 CMSS525 1 1 CMSS530 1 1 CMSS540 1 1 CMSS545 1 1 CMSS570 1 1 CMSS590 1 1 COM terminal 3 7 D dc power 1 9 5 1 E EMI 2 6 F Filter Enveloped Acceleration 2 16 Full scale 2 3 G Grounding 1 11 SKF Machine Condition Transmitter User Manual ISO B 1 J Jumper Locations 2 8 L Latching Non latching Alarms 3 7 M MCT Installation 5 3 Microlog 1 1 2 15 P Peak Detection 4 8 Power Supply Distribution 1 10 R RMS 1 1 RST terminals 3 7 T Transducer Cable 2 6 Transducer OK Circuit 2 7 Trip multiply 1 4 Trip Multiply 3 7 Typical Power Wiring Configuration 1 10 V Vibration Enveloped Acceleration B 3 Velocity B 1 Index 1 General Severity Level Guidelines Vibration Enveloped Acceleration Measurements Index 2 SKF Machine Condition Transmitter User Manual
3. ISO 10816 2 Steam Turbines and Generators Speed RPM 1500 or 1800 3000 or 3600 Velocity mm sec RMS 11 8 10 0 8 5 7 5 5 3 3 8 Unrestricted Operation 2 8 1 4 Newly Commissioned 0 0 Machinery Table B 15 Vibration Severity Chart ISO 10816 2 Industrial machines with nominal power above 15 kW and nominal speeds between 120 RPM and 15000 RPM when measured in position are covered by ISO 10816 3 The machines are separated into 4 different groups Group 1 Large machinery and electrical machines with shaft height greater than 315 mm that are normally equipped with sleeve bearings Group 2 Medium size machines and electrical machines with shaft height between 160 mm and 315 mm that are normally equipped with rolling element bearings and operate at speeds above 600 RPM SKF Machine Condition Transmitter User Manual General Severity Level Guidelines Vibration measured in Velocity Group 3 Pumps with multivane impellers and separate drivers with rated power above 15 kW Machines of this group may be equipped with sleeve or rolling element bearings Group 4 Pumps with multivane impellers and with integrated drivers that are equipped with sleeve or rolling element bearings Velocity IS0 10816 Machinery Group Machinery Group 3 2 amp 4 1 amp 3 Rated Power 15 kW 300 kW Group 1 300 KW 50 MW Group 3 abov
4. Use the Scaling Factor chart Figure B 2 SKF Machine Condition Transmitter User Manual 1 40 1 20 1 00 0 80 0 60 0 40 0 20 Scaling Factor 0 00 General Severity Level Guidelines Vibration Enveloped Acceleration Measurements 500 1000 1500 2000 Fmax Hz Figure B 38 Scaling Factor for Fmax Compensation for Enveloped Acceleration Measurements The definition for an alarm condition for the enveloped acceleration transmitter module also depends on the application Alarms can be a warning that a certain condition has occurred and that further analysis is required Based upon those results a decision must be made on further required actions The MCT is then used as a monitoring device The alarm condition can also be used to take direct action In this case the MCT module is fulfilling a protective task together with the process control relay system The software CMSW5000 Atlas For Windows features a calculator for enveloped acceleration alarm settings and is based on identical assumptions SKF Machine Condition Transmitter B 7 User Manual General Severity Level Guidelines Vibration Enveloped Acceleration Measurements For more information please visit our website www skfcm com select Support From the Support Center Home select Application Notes Download CM3068 PDF from the Machine Condition Transmitters category B 8 SKF Machine Condition Transmitter User Manual Index
5. MCD all Multilog Condition Monitoring Units CMU Multilog Local Monitoring Units LMU all Vibration PenPlus all transmitters all SKF software all Monitor Interface Modules MIM all Machine Condition Transmitters MCT MicroVibe P and Custom Products with the prefix of CMCP with the exception of any consumable or expendable items TW0 YEAR WARRANTY Products warranted for two 2 years by SKF are as follows All standard Eddy Probes Eddy Probe Drivers and Eddy Probe Extension Cables all standard seismic sensors accelerometers and velocity transducers and all M800A and VM600 Machinery Monitoring Systems For all On Line Systems that have satisfied Criteria 1 and 2 below the warranty period shall be either thirty 30 months from the date the On Line System is shipped by SKF to Buyer two 2 years from the date the On Line System is installed and commissioned by SKF or two 2 years from the date on which the installation of the On Line System has been audited and commissioned by SKF or its authorized service representative whichever period ends first Criteria 1 Devices used with a Multilog Condition Monitoring Unit CMU Multilog Local Monitoring Unit LMU including but not limited to the sensing device the interconnect cabling junction boxes if any and the communications interface must consist only of SKF supplied or SKF approved devices and or components The computer provided by Buyer must meet the requireme
6. 8 C 121 0 oC 17 8 C Converted Output Reading in Farenheit x 250 deg F 93 75 deg F SKF Machine Condition Transmitter User Manual CMSS500 Series Transmitters Output Converted Output Reading in Celsius ne sen x138 8 deg C 34 27 deg C m Buffered Output The MCT provides access to the buffered transducer signal using a BNC connector on the front of the unit and on a screw terminal at the top of the unit These buffered outputs have the same sensitivities units and bias voltages as the transducer itself i e mV g for an accelerometer or mV IPS for a velocity transducer This output can be connected to portable monitoring equipment or analyzers i e SKF Microlog Series Data Collector Analyzer or can be used to check the bias output voltage BOV of low impedance transducers using a digital voltmeter The buffered output is unfiltered For electro mechanical velocity transducers only The buffered output sensitivity is scaled to 100 mV IPS regardless of the actual input sensitivity For example a 145 mV IPS transducer will have a scaled buffered output sensitivity of 100 mV IPS SKF Machine Condition Transmitter 2 17 User Manual CMSS500 Series Transmitters Output 2 18 SKF Machine Condition Transmitter User Manual 3 CMSS500 Series Monitor gt This section applies only to the Monitor units Setting Monitor Alarms For a brief overview of vibration severity levels reference the General
7. CONDUIT 31nqON T3A LOW CE Installation MCT and Sensors 5 4 SKF Machine Condition Transmitter User Manual CE Installation Guide CE Installation TRANSDUCER Lr HOUSING amp KS CMSS50042300 ENCLOSURE PY fe i OPTIONAL A EN PC NN A es Y s I e H TERMINAL BLOCK SA if 2 OR BARRIER STRIP a 2 MCT SENSOR i J MOTOR PUMP SKF Machine Condition Transmitter 5 5 User Manual CE Installation Guide CE Installation 5 6 SKF Machine Condition Transmitter User Manual Appendix Mounting and Outline CMSS500A 1 60 boddodd i a ee Figure A 33 MCT with Companion Monitor Front View SKF Machine Condition Transmitter User Manual Mounting and Outline CMSS500 Figure 34 MCT Modules Side View CMSS500 Figure A 35 MCT Transmitter only Front View A 2 SKF Machine Condition Transmitter User Manual Mounting and Outline CMSS500 O q Clo O 3 9a a Fig
8. Each enveloped acceleration transmitter provides three band pass filters Special Velocity Units I LE 00V E03P H50L1 5 ae mV IPS m a Velocity Transmitter Transducer A with Monitor without Monitor E English IPS 03 Full Scale Option 3 P Peak Detection H50 High pass filter 50 Hz L1 5 Low pass filter 1 5 KHz The unique serial number identifies individual transmitters and is used for warranty quality control and service purposes The label also has the CSA and CE approval marks Powering the MCT The MCT requires externally supplied dc power The selected power supply should have a nominal output of 24 Vdc and be capable of supplying minimum currents noted in Table 1 2 Model Minimum Power Number Supply Unit CMSS525 CMSS530 CMSS540 SKF Machine Condition Transmitter User Manual Introduction Powering the MCT MSS545 MSS570 MSS525A 110 mA MSS530A MSS540A MSS545A MSS570A MSS590 75 mA MSS590A 125 mA Table 1 2 MCT Maximum Currents AIMIDDAADAAINA Average current requirements are usually lower A regulated power supply dedicated to the vibration monitoring system is recommended It is also recommended that connections between the power supply and the transmitter monitors be made with shielded twisted instrument cable The cable shield should float at the transmitter monitor and connect to ground at the power supply system common end only The MC
9. Severity Level Guidelines appendix DANGER Alarm LED CV Analog current Vibration Output 0 5 V Vibration Buffered Monitor BNC A Alarm Set Point 0 5 V Output BNC D Danger Set Point 0 5 V Selector Switch DC Sensor Bias Voltage Sensor OK LED Danger Set Point Potentiometer Alert Set Point Potentiometer ALERT Alarm LED estese su Figure 3 1 MCT Front View With Monitor Options Explained Alert and Danger Alarm Setpoint Adjustment ALERT and DANGER alarm setpoints can be independently set in the field by turning the front panel selector switch to the associated position A or D and adjusting the associated front panel potentiometer until SKF Machine Condition Transmitter 3 1 User Manual CMSS500 Series Monitor Alert and Danger Alarm Setpoint Adjustment the correct dc voltage is measured at BNC connector located directly above the selector switch Adjusting the setpoint requires the use of a digital voltmeter knowledge of the transmitter s full scale range and the desired setpoint as a percentage of the full scale range The voltage measured at the BNC will vary between 0 Vdc and 5 Vdc corresponding to 0 to full scale For example 2 5 Vdc represents 50 of full scale 3 75 Vdc represents 75 of full scale To calculate the required setpoint voltage use the equation 5 xx where xx is the desired percentage expressed as a decimal fraction of the full scale range For example 5 60 3 00 Vdc for a setpoint
10. TITLE AND FOR THE WARRANTIES EXPRESSLY SET FORTH IN HEREIN IT IS UNDERSTOOD AND AGREED THAT a SKF MAKES NO OTHER WARRANTY REPRESENTATION OR INDEMNIFICATION EITHER EXPRESS OR IMPLIED INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTY OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE OR NON INFRINGEMENT b IN NO EVENT SHALL SKF BE LIABLE OR OBLIGATED FOR SPECIAL EXEMPLARY PUNITIVE INCIDENTAL DIRECT INDIRECT GENERAL OR CONSEQUENTIAL DAMAGES INCLUDING BY WAY OF EXAMPLE ONLY LOST PROFITS OR SAVINGS LOSS OF BUSINESS OR LOSS OF USE OR ANY OTHER LOSS COST OR EXPENSE IN CONNECTION WITH THE PRODUCTS AND RELATED SERVICES IF ANY PROVIDED BY SKF AND THIS DISCLAIMER SHALL EXTEND AS WELL TO ANY LIABILITY FOR NONPERFORMANCE CAUSED BY SKF S GROSS OR ORDINARY NEGLIGENCE AND IN ALL CASES REGARDLESS OF WHETHER OR NOT ANY OF THE FOREGOING WERE FORESEEABLE OR THAT SKF WAS ADVISED AS TO THE POSSIBILITY OF SUCH DAMAGES LOSS COST OR EXPENSE AND c NO PERSON HAS BEEN AUTHORIZED BY SKF TO MAKE ANY FURTHER OR CONTRARY INDEMNITIES REPRESENTATIONS OR WARRANTIES ON BEHALF OF SKF THE FOREGOING LIMITATIONS AND DISCLAIMERS OF LIABILITY SHALL BE MADE APPLICABLE TO THE SALE OF ANY PRODUCT BY SKF TO THE FURTHEST EXTENT PERMITTED BY APPLICABLE LAW The exclusive remedies provided in this limited warranty shall not be deemed to have failed of their essential purpose so long as SKF is willing and able to perform to the extent and in the manner prescribe
11. of 60 of the full scale range Turning the potentiometer clockwise increases the setpoint voltage SKF Machine Condition Transmitter User Manual CMSS500 Series Monitor Alert and Danger Alarm Setpoint Adjustment Top Pluggable Terminal c os C VMWADV Front O OOOOO Back 2 5 Power supply GND Power supply 24 Voc 125 mA Figure 3 2 Setting Alarm Levels SKF Machine Condition Transmitter 3 3 User Manual CMSS500 Series Monitor Alert and Danger Alarm Delays Adjustment Alert and Danger Alarm Delays Adjustment The Alert and Danger alarm delays can be independently set by internal jumper selection to 1 1 3 6 or 10 seconds The purpose of the delay is to reduce nuisance alarms caused by external electrical noise and or transient vibration events Both the Alert and Danger delays are factory set to the 3 second position To change the delay open the unit and move the delay jumpers to the proper position SKF Machine Condition Transmitter User Manual CMSS500 Series Monitor Alert and Danger Alarm Delays Adjustment Setting Jumper Configuration Alert Time Delay E1 0 1 sec E2 1 sec E3 3 sec OX factory preset E4 6 sec E5 10 sec Danger Time Delay E6 0 1 sec E7 1 sec E8 CIO 3 sec factory preset E9 6 sec E10 10 sec Latching Non latching Alarms E11 Open Alert Non latching KO factory p
12. the alarm settings reference Setting Monitor Alarms in Chapter 3 Identification Label An identification label on the right side of the module provides information about the module type including a unique model number identifying data of the module s basic configuration such as the factory configured sensor type the measurement method and the installed filter characteristics Standard MCT Units CMSS525A100 02R 100 mV g Acceleration Input Transmitter ensitivity A with Monitor without Monitor 0 to 10 g RMS Detecton CMSS530A100A ER ISO Er 100 mV g Velocity Input Transmitter Sensitivity A with Monitor without Monitor E English IPS RMS Detection M Metric mm sec RMS Detection ISO Standard 10 Hz to 1 KHz ISOLF Low Frequency 2 Hz to 2 KHz 1 6 SKF Machine Condition Transmitter User Manual Introduction Identification Label CMSS540A200 02 200 mV g Displacement Input Transmitter ensitivit A with Monitor without Monitor 10 mils Peak to Peak CMSS545A200 04 le 200 mV g Position Input Transmitter ensitivit A with Monitor without Monitor 0 80 mils 40 0 40 0 20 mm 1 0 0 1 0 CMSS570A Temperature Transmitter A with Monitor without Monitor CMSS590A100A 100 mV g Enveloped Input Acceleration Sensitivity Transmitter A with Monitor without Monitor SKF Machine Condition Transmitter User Manual Introduction Powering the MCT
13. E approved systems it is recommended to use shielded twisted pair cables for all signal connections Except for the sensor signal for example accelerometer all shields must be connected to PE SKF Machine Condition Transmitter User Manual 2 CMSS500 Series Transmitters Overview CMSS525 Acceleration Transmitter The CMSS525 is a 4 20 mA RMS Acceleration Transmitter It is factory configured for compatibility with a low impedance voltage output accelerometer The input signal is processed to determine the overall vibration amplitude in terms of RMS acceleration g s The enveloped acceleration transmitter unit always uses a 100 mV g low impedance constant current powered accelerometer Full scale option Range English Jumper 01 5g E2 02 10g E3 03 15g E2 E3 04 20g E3 E4 05 25g E2 3 E4 Table 2 1 MCT Acceleration Transmitter Indicates the factory preset range Standard filter band for the CMSS525 is from 2 Hz to 20 KHz SKF Machine Condition Transmitter 2 1 User Manual CMSS500 Series Transmitters Overview CMSS530 Velocity Transmitter The CMSS530 is a 4 20 mA Velocity Transmitter It is factory configured for use with a low impedance accelerometer and can also be configured for use with a low impedance velocity sensor or electro mechanical velocity sensor The sensor imput signal is processed to determine its overall vibration level in terrns of either vel
14. Range gE Install Jumpers 10 E8 30 E9 80 E10 Table 2 12 Enveloped Acceleration MCT Options CMSS590 Enveloped Acceleration Filter Selection The enveloped acceleration transmitter is delivered with three standard band pass filters Table 2 13 shows the available filters for each unit Filter Band BandPass Fmax Old MCM Jumper Number Filter Setting for Filter for Setting Microlog Frequencies Microlog Range Hz When Reference Compared Hz 2 50 to 1 000 100 44 E4 and E7 3 500 to 10 000 1 000 66 E3 and E6 4 5 000 to 10 000 88 E2 and E5 40 000 Table 2 13 Integrated Enveloped Acceleration Filter Settings 2 14 SKF Machine Condition Transmitter User Manual CMSS500 Series Transmitters Output The factory preset for the enveloped acceleration transmitter module is Filter 3 500 to 10 000Hz Use the following guideline to define the proper band pass for the application The low frequency roll off of the band pass filter to eliminate rotational components is Fmin gt 10 x RPM 60 Output amp 20 mA Output The primary output of the transmitter monitor is the 4 20 mA current output which is scaled proportional to the full scale range of the unit For example if the range is 0 1 IPS peak then 4 mA indicates a reading of 0 00 IPS and 20 mA indicates a reading of 1 00 IPS peak This output is intended to drive a maximum resistive load of 500 Ohms with respect to system common at the PLC DCS inpu
15. T regulates dc power internally to prevent a fault on the output of one channel from affecting other channels When power is first applied to a transmitter monitor after connecting the transducer a delay of approximately 30 seconds will occur before the OK LED turns ON Power Supply Distribution If more than one MCT module is installed terminal blocks for power and ground should be used From these terminal blocks 24 Vdc power is distributed to each individual module It is recommended to use individual fuse terminals for each positive supply line so a power SKF Machine Condition Transmitter 1 9 User Manual Introduction Powering the MCT Cable shield connected to sensor failure in a single MCT module will not affect the other modules Note The MCT CMSS590 Enveloped Acceleration module has jumpers available to disconnect sensor power Therefore only the Enveloper casing Sensor must be grounded module can be the slave Insulate shield at transmitter side Optional Alternative Cable shield connected to instrument ground Insulate shield at sensor end L N PE POWER SUPPLY MASTER MCT MODULE SLAVE MCM MODULE system ground PE Figure 1 6 Typical Power Wiring Configuration Grounding When experiencing interference on the output signals due to common ground connections it is recommended to connect the 24 V GND at the power distribution terminals to the protective ground PE For C
16. cement Transmitter The CMSS540 is a 4 20 mA Displacement Transmitter It is factory configured for compatibility with an external non contact eddy current probe driver system The displacement signal is processed to determine the overall vibration amplitude in terms of peak to peak displacement The displacement transmitter unit is factory configured for use with an external eddy current probe driver system The specific displacement sensitivity is identified by four digits for example 200 immediately following the basic model number on the side label This number is the transducer sensitivity in mV mil SKF Machine Condition Transmitter 2 3 CMSS500 Series Transmitters Overview For example 200 indicates the transducer has an output sensitivity of 200 mV mil Other sensitivities are available by special order Full Scale Range English Metric Jumper 01 5 mils 127 microns E2 02 10 mils 254 microns E3 03 15 mils 381 microns E2 and E3 04 20 mils 508 microns E3 and E4 05 25 mils 635 microns E2 E3 E4 Table 2 4 MCT Displacement Transmitter Standard filter band for the CMSS540 is 2 Hz to 20 KHz CMSS545 Position Transmitter The CMSS545 is a 4 20 mA Position Transmitter It is factory configured for compatibility with an external non contact eddy current probe driver system and an external readout monitoring system to indicate the relative axial position of a rotor within its associa
17. ct Hi Lo accordingly to power supply input connector If DC input has 3 wires Hi Lo Earth connect earth to enclosure system ground Earth Ground System DC Ground gt gt gt gt P Common Bus Bar shaded portion 24V GND n pc POWER olo o o olo SUPPLY en a F250 mA U of ecelocel 250 V POWER SUPPLY ololo o ol o z z 3 WANS POT 4 LUN SYSTEM i h GROUND BUS BAR ololo a rfe ololo SIGNAL FRAME SIGNAL iets meine SID CONDUIT STUD OR mo e LA STUD ENCLOSURE A SENSOR POWER A INPUT CONDUIT CONDUIT TO BE GROUNDED TO BE GROUNDED TO ENCLOSURE TO ENCLOSURE Wiring for Internally Amplified Accelerometers SKF Machine Condition Transmitter 5 3 User Manual CE Installation Guide CE Installation MCT METAL ENCLOSURE WEATHERPROOF ACCEL HOUSING HOUSING CONDUIT CONDUIT N C J us OPTIONAL TERMINAL BLOCK t Wiring For Velocity Transducers VELOCITY MCT METAL ENCLOSURE TRANSDUCER HOUSING
18. d in this limited warranty CM F0001 Revision N 11 04 Contents Introduction 1 Th MOT Iransiiitter ox Stee wy ama sukan ets 1 The MCT Monitor 3 Identification Label 6 Powering the MOT nf spas nus ts 8 CMSS500 Series Transmitters 1 OVERVIEW ses mena OA u RAA ee havik 1 JUMPE Saana kha hans Sheth he Hoh Ato ae 7 UE ets tu Sr at hs eee enr Ne 15 CMSS500 Series Monitor 1 Setting Monitor Alarms aaa 1 Alert and Danger Alarm Setpoint Adjustment 1 Alert and Danger Alarm Delays Adjustment 4 Latching Non latching Alarms uu 6 mip Multiply Qu tha ten mes urine st 7 Ald PmURG lait sms tnana tnt nee suwas 8 Installing the Machine Condition Transmitter 1 MCT Typical Installation 1 Opening the Cases s saves iene her ann sn 2 Interfacing the MCT with Other Monitoring Systems4 SKF Machine Condition Transmitter TOC 1 User Manual Analyzing MCT Readings a aaa 6 Peak to Peak Measurements with the Microlog Acceleration and Enveloped Acceleration 7 RMS Measurements with the Microlog Acceleration and VElOCitY u an a a ama ae 8 Peak Detection in Velocity 8 CE Installation Guide 1 ENEE u up nt u u ee hatte 1 CE Installation Drawings a aaaaa 2 CE Installatighhuu l l u nan ts 4 Mounting and Outline 1 EMSSSOQA EE se ete ae tte Ae st oe a a 1 CMSS500LF2osS Su aa a un dans Sau iu N 2 General Severity Level Guidelines 1 Vib
19. d service center SKF will bear the cost of shipping any replacement Products to Buyer Buyer agrees to pay SKF s invoice for the then current price of any replacement Product furnished to Buyer by SKF if the Product that was replaced is later determined by SKF to conform to this limited warranty SKF shall not be obligated under this limited warranty or otherwise for normal wear and tear or for any Product which following shipment and any installation by SKF if required by the contract with the Buyer has in SKF s sole judgment been subjected to accident abuse misapplication improper mounting or remounting improper lubrication improper repair or alteration or maintenance neglect excessive operating conditions or for defects caused by or attributable to the Buyer including without limitation Buyer s failure to comply with any written instructions provided to Buyer by SKF SKF shall be free to conduct such tests investigations and analysis of the Products returned to SKF as it deems reasonable and proper in the exercise of its sole judgment As a further condition to SKF s obligations hereunder Buyer shall offer its reasonable cooperation to SKF in the course of SKF s review of any warranty claim including by way of example only Buyer s providing to SKF any and all information as to service operating history mounting wiring or re lubrication of the Product which is the subject of the Buyer s warranty claim EXCEPT WARRANTY OF
20. ducer OK relay contact and a trip multiply function Tx Trip multiply allows the alarm levels to be temporarily SKF Machine Condition Transmitter 1 3 User Manual Introduction The MCT Monitor increased by a factor of two or three to avoid false alarms for example during the start up phase of a machine ACC Signal Power ACC Signal GND Buffered Vibration GND Buffered Vibration Output Power supply 24 V Power GND 4 20 mA GND 4 20 mA Output Figure 1 3 MCT Transmitter General Pin Assignment 1 4 SKF Machine Condition Transmitter User Manual Introduction The MCT Monitor Trip Multiply Terminal Reset Alarm Reset Trip Multiply Common Alarm Common Trip Multiply Terminal OK Relay Output N O OK Relay Output ARM OK Relay Ouput N C Figure 1 4 MCT Transmitter Monitor General Pin Assignment u0rysod dK1 2 s a 3 ri a amp gt 8 2 Alert N C Auxilary Power Output 20 Vdc at 20 mA max Alert Common Auxilary Common Alert N O Switched Output Danger N C Alert Set Point 0 5 V Danger Common Danger Set Point 0 5 V Danger N O Current Value 0 5 V Figure 1 5 MCT Transmitter Monitor Top and Bottom Pluggable Terminals SKF Machine Condition Transmitter 1 5 User Manual Introduction Identification Label Both monitors and transmitters mount on standard DIN rail either G rail or T rail For more information concerning
21. e 15 kW Unrestricted Operation 2 3 1 4 0 7 Newly Commissioned Machinery 0 0 Foundation Rigid Flexible Rigid Flexible Table B 16 Vibration Severity Chart ISO 10816 3 SKF Machine Condition Transmitter B 3 User Manual General Severity Level Guidelines Vibration Enveloped Acceleration Measurements Vibration Enveloped Acceleration Measurements Severity levels for machine vibration and bearing defect detection by means of the enveloping technique are needed to classify the machine condition according to standards and practical guidelines For enveloped acceleration in all forms severity levels are related to speed and bearing size The bearing size is generally related to the load capabilities of the machine The higher the speed the higher the energy generated by impacts as elements roll over bearing damage The relation Maximum shaft speed times shaft diameter has a maximum depending on the bearing technology Notice that for bigger bearings the speed is limited and therefore the severity levels are also limited Carefully select the severity levels for enveloped acceleration using machine knowledge Sensor location and sensor installation is important for successful machine monitoring The boundaries between different states of severity conditions are less defined Comparative and relative judgement methods are preferred above absolute judgement and the application
22. er alarm annunciators act as a dry or low dc voltage contact closure input to other systems or act to actuate an appropriately sized slave relay for larger loads such as shutting down a motor Rated Amps Voltage 5A 30 Vdc 5A 125 Vac 2 5A 250 Vac Table 3 2 Relay Contacts Rating SKF Machine Condition Transmitter User Manual 4 Installing the Machine Condition Transmitter MCT Typical Installation TYPICAL INSTALLATION Part Number CMSS2100 Cable shielded twisted pair 30 m 100 feet Junction box for cable lengths longer than ral 30 m 100 feet Alarm Reset Extension cable or Trip Multiply multi core External meter connections OK Relay Output L 4 Alert Danger Relay Output Power supply 24 V Power supply GND DCS PLC Input Resistor 1 to 5 Volt DC R 250 Ohm SKF Machine Condition Transmitter 4 1 User Manual Installing the Machine Condition Transmitter Opening the Case Opening the Case Opening the MCT case is best done with a small flat blade screwdriver On transmitters 1 inch 26 mm wide units insert the tip of the screwdriver between the right side cover as viewed from the front of the unit and the DIN rail mounting foot at the back of the unit as shown in Figure 4 9 and gently leverage the blade to begin separating the cover from the rest of the unit Carefully work your way around to the front of the un
23. er bandwidth settings of the Velocity MCT CMSS530 module The detection method must be set to RMS Important The MCT VEL module uses an analog filter and integrator which measure continuously The Multilog and Microlog calculate the RMS value from the spectrum which is not continuously processed This discontinuity which is minimized by selecting the Hanning window may cause low frequency problems which result in ski slopes after integration These possible ski slope effects may have large influences on the RMS overall velocity reading Peak Detection in Velocity The MCT velocity modules with peak detection provide a true peak reading in contrary to the older MCM modules which provided a pseudo peak derived from the RMS reading True peak detection typically results in higher values when data is collected at the same measurement 4 8 SKF Machine Condition Transmitter User Manual Installing the Machine Condition Transmitter Peak Detection in Velocity location over the same frequency range The data can be trended and analyzed nonetheless If the user is more familiar with the Calculated Peak RMS x 1 414 specify the RMS detection when ordering Select an approximate 1 4 times higher full scale value to get the same results For example the older MCM has a full scale of 1 IPS and peak pseudo detection An MCT velocity module with a full scale of 1 5 IPS and RMS detection will deliver the same results SKF Machine C
24. er supply GND OPTIONAL ISOLATION AMPLIFIER Figure 4 31 MCT CMSS500 Series Interfacing SKF Machine Condition Transmitter 4 5 User Manual Installing the Machine Condition Transmitter Analyzing MCT Readings Oo Figure 4 32 MCT CMSS540 Eddy Probe Interfacing Analyzing MCT Readings Unlike other SKF Reliability Systems analyzing products that use digital signal processing MCT modules use analog signal processing techniques so be careful when comparing results with digital instruments For enveloped acceleration gE applications the filter ranges in the Microlog and Multilog are equal but the filter 4 6 SKF Machine Condition Transmitter User Manual Installing the Machine Condition Transmitter Peak to Peak Measurements with the Microlog Acceleration and Enveloped Acceleration range of the enveloper circuitry in the Vib Pen Plus is fixed between 5 kHz and 10 kHz to obtain a general bandwidth where low frequency influences due to hand held operation are eliminated Detection methods of the Microlog and Multilog are in general based upon detecting a maximum and minimum peak value within the whole time period of the measurement From this peak to peak value the zero peak value is calculated The RMS value is always derived from the calculated spectrum and is not a true RMS conversion on the dynamic time signal unlike the MCT modules Furthermore MCT modules use averagin
25. g methods to prevent unwanted fluctuations The number of averages for the Multilog and Microlog are free selectable It is advised to select 4 to 8 averages to create a comparable total measurement time period Guidelines for using the Microlog as an analysis instrument in combination with the MCT modules are provided Peak to Peak Measurements with the Microlog Acceleration and Enveloped Acceleration The buffered vibration output is used as an input signal to the Microlog The selected enveloped acceleration filter setting for the Microlog must be equal to the filter choice on the enveloped acceleration transmitter The maximum frequency must be set at twice the value of the selected low corner cut off frequency of the enveloped acceleration filter for example filter 500 Hz to 10 kHz results in a maximum analyzing frequency of 1 kHz SKF Machine Condition Transmitter 4 7 User Manual Installing the Machine Condition Transmitter RMS Measurements with the Microlog Acceleration and Velocity Peak to Peak readings on the Microlog can be compared to the Peak reading of the MCT module This difference of detection method is based upon the fact that the Microlog has an AC coupled signal processing path while the MCT modules use a dc coupling RMS Measurements with the Microlog Acceleration and Velocity The buffered vibration output is used as an input to the Microlog The Microlog s frequency settings must be equal to the filt
26. is required for other Fmax values A scaling equation is provided in Part Il Sensor CMSS793 or CMSS797 or MCD probe SKF Machine Condition Transmitter B 5 User Manual General Severity Level Guidelines Vibration Enveloped Acceleration Measurements Detection Peak to Peak Perform measurements with the machine operating under normal conditions For example when the rotor and the main bearings have reached their normal steady operating temperatures and with the machine running under its normal rated condition at rated voltage flow pressure and load To obtain the most accurate readings enveloped acceleration measurements require probe placement in the maximum load zone or as close as possible to the maximum load zone within the measured bearing or gear box Example Bearing bore diameter 100 mm Shaft speed 1800 RPM Fmax 60 000 CPM Use the chart in Figure B 1 to determine this enveloped acceleration measurement s alert and danger alarm settings Locate 100 mm on the shaft diameter axis Follow the vertical line representing 100 mm to the point where it intersects the 1800 RPM running speed line This is your reference point From your reference point follow the horizontal lines left to the danger settings axis to determine your initial danger alarm setting 7 5 gE From your reference point follow the horizontal lines right to the alert settings axis to determine your initial alert alarm setting 2 5 gE
27. it to complete removal of the cover exposing the circuit board components Insert blade at the back of the unit Figure 4 29 Blade Insertion Point on Transmitter On Monitors 1 6 inch 41 mm wide units you must first carefully separate the two halves of the unit at the center see Figure 4 10 The sides do not need to be removed This is done by working the screwdriver around the SKF Machine Condition Transmitter User Manual Installing the Machine Condition Transmitter Opening the Case middle of the unit in the same general manner described above Figure 4 30 Transmitter Monitor Separated at Center As the two sides start to separate you will see that a short ribbon cable inside holds them together To remove this cable carefully pull it away from the left hand side of the unit as viewed from the front The cable stays with the right hand side permanently Important When reinstalling this cable make sure it is properly connected to the mating connector and that the bend in the cable goes towards the front panel side of the unit If the unit is closed with the bend towards the back the ribbon cable can be damaged Also make sure the ribbon cable connector does not catch on the relays when pressing the unit back together SKF Machine Condition Transmitter 4 3 User Manual Installing the Machine Condition Transmitter Interfacing the MCT with Other Monitoring Systems Interfacing the MCT wi
28. lso disable the ALERT and DANGER alarms relays until the fault is removed and an OK condition exists When configured for use with an electro mechanical transducer E the OK circuit will only detect an open circuit condition of the transducer cable Jumpers See Opening the Case in Chapter 4 for information on gaining access to jumpers Changing ranges by jumper selection only will introduce an additional error of 5 typical 2 max For greater accuracy the system range must be re calibrated SKF Machine Condition Transmitter 2 7 User Manual CMSS500 Series Transmitters Jumpers Jumper Locations Setting Jumper Configuration Range Settings E2 KO E2 E3 0 to 0 5 IPS or 12 5 mm sec E4 Option 01 E2 QO E3 E3 OA 0 to 1 0 IPS or 25 0 mm sec factory E4 preset Option 02 E2 E2 and E3 E3 0 to 1 5 IPS or 37 5 mm sec E4 Option 03 E3 0 to 2 0 IPS or 50 0 mm sec E4 S A Option 04 E2 E2 and E3 and E4 E3 E 0 to 2 5 IPS or 62 5 mm sec E4 5S Option 05 Special Filters optional E1 OU Remove to install Filter 2 E5 SA Remove to install Filter 1 Table 2 6 MCT Velocity and RMS and True Peak Displacement Options 2 8 SKF Machine Condition Transmitter User Manual CMSS500 Series Transmitters Jumpers MCT VEL Peak PC Board OFul drde indicates factory preset 4 4 4 w COCO x ny RE ac fo Pl J1 8 Pi
29. n Connector Ribbon Cable PUIS ISIS Is Is Is on m E5 Range Jumpers E4 E3 E2 Be COCO 66000000 00000000 Figure 2 4 MCT Velocity Peak Detection and Displacement Jumper Locations Range Jumpers Range g RMS Install Jumpers 5 E2 10 E3 15 E2 E3 20 E3 E4 25 E2 E3 E4 Table 2 7 Acceleration RMS Range Jumpers SKF Machine Condition Transmitter 2 9 User Manual CMSS500 Series Transmitters Jumpers Range IPS Peak Install Jumpers 0 5 E2 1 0 E3 1 5 E2 E3 2 0 E3 E4 2 5 E2 E3 E4 Table 2 8 Velocity MCT Peak Range Jumpers MCT VEL RMS PC Board O Ful circle indicates factory preset 4 a w CLO2O O To A a P1 8 Pin Connector Ribbon Cable li B E2 REN Range Jumpers E4E3 en 191ld oooooooeo S 00000000 00000000 0000000 gt n PIA e lt Figure 2 27 MCT Velocity and Acceleration RMS Detection Jumper Locations 2 10 SKF Machine Condition Transmitter User Manual CMSS500 Series Transmitters Jumpers Range Install Jumpers English IPS Metric RMS mm sec E2 0 5 12 5 E3 1 0 25 0 E2 E3 1 5 37 5 E3 E4 2 0 50 0 E2 E3 E4 2 5 62 5 Table 2 9 Velocity MCT RMS Range Jumpers Range Install Jumpers English mils Metric micron
30. netic noise sources EMI A well shielded properly installed transducer cable is necessary to obtain reliable operation Shielded twisted pair cables designed and pre fitted with the proper transducer connector or sensors with integral cable which are sold for this specific purpose are recommended The cable shield should be open at the transmitter end and connected to ground through the sensor casing Alternatively the cable shield could be SKF Machine Condition Transmitter User Manual CMSS500 Series Transmitters Jumpers open at the transmitter end and connected to common xdcr terminal at the transmitter monitor input only Transducer OK Circuit The vibration transmitter units incorporate a transducer OK circuit This feature continuously monitors the transducer bias and signal voltage If this voltage exceeds preset limits the 4 20 mA output current is reduced to less than 2 mA typically 0 mA to allow detection of the fault condition at the associated PLC or DCS system A green OK LED on the front of the unit normally ON in an OK condition turns OFF to provide a local indication of the fault condition For low impedance constant current powered transducers this circuit will effectively detect open shorted or reversed transducer connections When a detected fault is remedied a delay of approximately 30 seconds occurs before the unit returns to the OK condition and the OK LED turns back ON A detected fault will a
31. nts stipulated by SKF Criteria 2 SKF or its authorized service representative has installed the On Line System or has audited the installation and commissioned the On Line System On Line Systems are defined as systems consisting of Multilog Condition Monitoring Unit s CMU Multilog Local Monitoring Unit s LMU and any sensing or input devices the interconnect cabling between the sensing or input devices and the Multilog Condition Monitoring Unit s CMU Multilog Local Monitoring Unit s LMU and the cabling between the Multilog Condition Monitoring Unit CMU Multilog Local Monitoring Unit LMU and the proprietary SKF communications interface with the host computer OTHER SKF PRODUCTS Any SKF product supplied hereunder but not covered by this limited warranty shall be either covered by the applicable SKF limited warranty then in place for such product or if no such warranty exists shall be covered by the 90 day warranty stated above THIRD PARTY PRODUCT WARRANTIES For any third party products sold to Buyer by SKF SKF will transfer to Buyer any warranties made by the applicable third party product vendor to the extent such warranties are transferable CONDITIONS As a condition to SKF s warranty obligations hereunder and if requested or authorized in writing by SKF Buyer shall forward to SKF any Product claimed by Buyer as being defective Buyer shall prepay all transportation charges to SKF s factory or authorize
32. ocity RMS or Peak The velocity transmitter unit is factory configured for use with one of three transducer types The specific type is identified by four digits for example 100A immediately following the basic model number on the side label This number is the transducer sensitivity in either mV g or mV IPS see Table 2 2 below Typ LD 100A Transducer Type Sensitivity low impedance constant mV g current powered accelerometer 100V low impedance constant mV IPS current powered velocity sensor 500E self generating electro mV IPS mechanical velocity sensor Table 2 7 Identifying Transducer Type and Sensitivity Standard filter bands for the CMSS530 are the ISO 10 Hz to 1 0 KHz and the ISOLF 2 Hz to 2 KHz SKF Machine Condition Transmitter User Manual CMSS500 Series Transmitters Overview For example 100A indicates the transducer is a 100 mV g low impedance accelerometer Other sensitivities are available by special order Full Scale Range English Metric Jumper 01 5 IPS 12 5 mm sec E2 02 1 0 IPS 25 mm sec E3 03 1 5 IPS 37 5 mm sec E2 and E3 04 2 0 IPS 50 mm sec E3 and E4 05 2 5 IPS 62 5 mm sec E2 E3 E4 Table 2 3 MCT Velocity Transmitter Full scale option for all velocity transmitter units is factory preset to 02 for O to 1 0 IPS or to 25 0 mm sec if not otherwise specified in the model number CMSS540 Displa
33. of standards For creating a comparative measurement the process control system is able to create a trend of the vibration signal This signal can be compared against a baseline overall measurement of that measurement point with the knowledge that the machine is running under normal conditions In many cases periodic measurements have been performed on equipment before a permanent monitor such as the MCT system is installed The knowledge of those measurements and the machine behavior provides a good indication of effective alarm level settings SKF Machine Condition Transmitter User Manual General Severity Level Guidelines Vibration Enveloped Acceleration Measurements 33 3 To be used with CMSS793 797 accelerometers CMVA55 CMVA320 filter 3 fmax 30 000 CPM pk pk reading 3 30 Alert Setting gE Scale is 1 3 of Danger Scale 100 0 33 Danger Setting gE 10 100 1000 Shaft Diameter mm Figure B 37 Enveloped Acceleration Alarm Guidelines Fmax 60 000 CPM To utilize the above chart the following parameters must be known Bearing bore diameter in mm indicates load Shaft speed in RPM Assumptions for using the above chart are necessary as deviations from standardized data collection greatly affect enveloped acceleration readings Assumptions are as follows Filter 3 500 10 000 Hz Fmax 60 000 CPM 1 000 Hz A scaling factor
34. ondition Transmitter 4 9 User Manual Installing the Machine Condition Transmitter Peak Detection in Velocity 4 10 SKF Machine Condition Transmitter User Manual 5 CE Installation Guide Overview For CE compliance wiring schemes described in this CE Installation chapter must be followed For CE installations wiring schemes described in this chapter supersede wiring schemes described in other chapters Wiring scheme specific to CE installations are outlined below For CE installation the MCT s must be installed in a metal enclosure that provides shielding to the sides door and rear by being grounded to protective earth The earth ground bond must be made using a heavy gauge copper braid cable or copper bus bar in a manner that will ensure a continuous high quality connection Signal and dc power 1 0 cabling for the system should be enclosed in rigid or flexible metal conduit that is bonded to earth ground If an ac dc supply is included inside the enclosure the ac input power cabling must enter the enclosure through a conduit separate from the one used for dc power and 1 0 signals If the system is to be powered by an external dc power source the cable connecting the dc power to the system must utilize a twisted shielded pair cable of an appropriate gauge The cable shield must be connected to system ground at one end only The system dc ground should be connected to earth ground at only one point in the system ty
35. onitor The MCT Monitor CMSS525 RMS Acceleration Transmitter without Monitor CMSS525A RMS Acceleration Transmitter with Monitor CMSS530 Velocity Transmitter without Monitor CMSS530A Velocity Transmitter with Monitor CMSS540 Displacement Transmitter without Monitor CMSS540A Displacement Transmitter with Monitor CMSS545 Position Transmitter without Monitor CMSS545A Position Transmitter with Monitor CMSS570 Temperature Transmitter without Monitor CMSS570A Temperature Transmitter with Monitor CMSS590 Enveloped Acceleration Transmitter without Monitor CMSS590A Enveloped Acceleration Transmitter with Monitor Table 1 1 MCT Module Configurations MCT modules can be ordered as stand alone Monitors by adding the suffix A to the basic model number i e CMSS530A or CMSS590A When ordered as a stand alone monitor the unit includes an alarm module front panel and output relays that can be jumper configured for either latching or non latching operation The ALERT or DANGER LED will turn ON and the corresponding relay will actuate whenever overall vibration levels exceed the corresponding setpoint for more than a preset delay time jumper selectable The alarm module has a front panel accessible BNC connector and associated selector switch for reading the analog current vibration level CV or alarm setpoints A or D with a standard digital voltmeter The alarm module also provides a trans
36. ory preset from 0 to 250 F 17 8 to 121 C CMSS590 Enveloped Acceleration Transmitter The CMSS590 is a Enveloped Acceleration Transmitter It is factory configured for use with a low impedance accelerometer The sensor input signal is processed to determine its overall vibration level in terms of enveloped acceleration The enveloped acceleration transmitter unit always uses a 100 mV g low impedance constant current powered accelerometer SKF Machine Condition Transmitter 2 5 User Manual CMSS500 Series Transmitters Overview Range Full Scale Jumper 01 10 gE E8 02 30 gE E9 03 80 gE E10 Table 2 5 MCT Enveloped Acceleration Full scale option for all enveloped acceleration transmitter units is factory preset to 10 gE The Filter option is set to Filter 3 500 Hz to 10 Hz unless otherwise specified in the model number Transducer Cable The vibration transmitter units provide power for the transducer via a nominal 4 4 mA constant current source This is generally enough current to allow operation with transducer cables extending up to about 100 ft Longer cables may be used depending on the sensor and cable specifications However it is strongly recommended that the transmitter monitor be mounted as close as practical to the associated transducer This will prevent signal distortion associated with current drive limitations and will minimize interference from external electro mag
37. pically by SKF Machine Condition Transmitter 5 1 User Manual CE Installation Guide CE Installation Drawings connecting a system common bus bar located in the system enclosure to the enclosure system ground bus bar Each sensor transducer providing input to the system should be connected to its respective transmitter monitor via a twisted shielded cable assembly approved by the manufacturer for use with that specific sensor transducer type The sensor cable shield must be connected to system ground at one end only When the sensor transducer case is mounted on an earth grounded machine casing or structural point the cable shield may be terminated at the sensor end Otherwise it should be terminated to earth ground at the transmitter monitor end via direct connection to the system ground bus bar Signal outputs 4 20 mA intended for connection to remote loads should be connected using manufacturer approved twisted shielded pair cable If the remote load is referenced to earth ground at a location different from that of the system enclosure a current loop isolator may be required CE Installation Drawings 5 2 MCT 24 Vdc Power Supply Installation SKF Machine Condition Transmitter User Manual CE Installation Guide CE Installation Drawings System ground All panels from enclosure must be grounded to a system ground on enclosure Ground wires should be as short as possible If DC input has 2 wires Hi Lo conne
38. ration measured in Velocity aa 1 Vibration Enveloped Acceleration Measurements 4 TOC 2 SKF Machine Condition Transmitter User Manual 1 Introduction SKF Reliability Systems Machine Condition Transmitter MCT modules are compact rail mounted devices that convert part of a wide band input signal to a signal proportional to machine vibration The MCT Transmitter There are six MCT versions the CMSS525 is an RMS acceleration transmitter the CMSS530 is a velocity transmitter the CMSS540 is a displacement transmitter the CMSS545 is a position transmitter the CMSS570 is a temperature transmitter and the CMSS590 is an enveloped acceleration transmitter Output is a standard 4 20 mA current proportional to this level within a specified full range such as 0 1 IPS RMS for velocity or 0 10 gE for enveloped acceleration The 4 20 mA output is suitable for a direct connection to a Programmable Logic Controller PLC or Distributed Control System DCS A BNC connector on the front of the unit provides access to the buffered transducer signal for use with portable monitoring equipment such as the SKF Microlog Series Data Collector Analyzer SKF Machine Condition Transmitter 1 1 User Manual Introduction The MCT Transmitter Figure 1 1 The MCT Transmitter Figure 1 2 The MCT Transmitter Monitor 1 2 SKF Machine Condition Transmitter User Manual Introduction The MCT M
39. reset Closed Alert Latching E12 Open Danger Non latching pq factory preset Closed Danger Latching Trip Multiply factor E13 Open factor 2x factory preset Closed factor 3x Table 3 1 Monitor Jumper Options SKF Machine Condition Transmitter User Manual CMSS500 Series Monitor Latching Non latching Alarms Danger Delay Alert Latch a RR Be Danger Latch 013638323 Figure 3 3 Monitor Jumper Locations Latching Non latching Alarms The Alert and Danger alarms are factory set for non latching operation This means that whenever the 3 6 SKF Machine Condition Transmitter User Manual CMSS500 Series Monitor Trip Multiply vibration level drops below the associated setpoint for more than about 1 second the associated relay will de energize and the alarm LED will turn off The alarms can also be set for latching operation by installing shunts on jumpers E11 and E12 on the Alarm module circuit board Latched alarms may be reset by closing the RESET RST and COMMON C0M contacts at the top of the unit This may be done with an external switch dry contact relay or by shorting the terminals together by hand Important Do not apply voltage to either the RST or COM terminals If several monitors are mounted together the RST terminals may be daisy chained together and switched to COM system common as a group Trip Multiply The alarm module provides a trip mul
40. s E2 5 127 E3 10 254 E2 E3 15 381 E3 E4 20 508 E2 E3 E4 25 635 Table 2 10 Displacement Range Jumpers SKF Machine Condition Transmitter 2 11 User Manual CMSS500 Series Transmitters Jumpers Setting Jumper Configuration Constant Current Source E1 OO Provides constant current factory preset No current supply uses buffered output as signal input E2 E5 Selectable Filterbands CO ENV Filter 4 5 kHz to 40 kHz E3 E6 RO ENV Filter 3 500 Hz to 10 kHz factory preset factory preset E4 E7 ENV Filter 2 50 Hz to 1 0 kHz Range Settings E8 Range 1 0 to 10 gE OKO factory preset E9 Range 2 0 to 30 dE E10 Range 3 0 to 80 gE Table 2 11 Enveloped Acceleration MCT Options 2 12 SKF Machine Condition Transmitter User Manual CMSS500 Series Transmitters Jumpers MCT ENV PCBoard 2020 Bles 8 pin Connector Jl Ribbon Cable Filter 3 lI er Range Jumpers Slee E8 E9 and E10 e E9 Jr10 El Filter selection Jumper E4 amp E7 B gt Current For Filter 2 50Hz to 1 kHz Source Jumper El 7022 E7 Figure 2 28 Enveloped Acceleration MCT Jumper Locations SKF Machine Condition Transmitter 2 13 User Manual CMSS500 Series Transmitters Jumpers Range Jumpers
41. t A precision 0 25 watt 250 Ohm resistor is the recommended load This will convert the 4 20 mA current reading to a 1 to 5 Vdc reading for the PLC DCS For example if the range is 0 to 0 5 IPS then 1 Vdc indicates a reading of 0 IPS and 5 Vdc indicates a reading of 0 5 IPS A short to ground common on this output will not cause damage The relationship of the measured vibration parameter to the output current is displayed in the following equation Units of Vibration ne Eis x Full Scale Value m Example Velocity SKF Machine Condition Transmitter 2 15 User Manual CMSS500 Series Transmitters Output Measured Current 12 mA Full Scale 1 IPS 12 mA 4mA Converted Output Reading TE x 1 IPS 0 5 IPS 16mA The relationship of the measured vibration parameter to the output voltage when using a 250 Ohm resistor is displayed in the following equation FullScale Value Units of Vibration iy Measured Voltage 1 Example Measured Voltage 3V Full Scale 0 5 IPS 0 5 IPS Converted Output Reading x 3V 1 0 25 IPS The relationship of the measured temperature parameter to the output current is displayed in the following equations Farenheit Measured Current EUR x Full Scale Value 16 mA Celsius Measured Current Spiny x Full Scale Value 16 mA Example Temperature Measured Current 10 mA Full Scale 250 F 10 mA 4 mA 16 mA Measured Current 10 mA Full Scale 138
42. ted bearing range In this application it is recommended that two independent probe driver transmitter channels be installed to provide redundancy and to allow the readout monitoring system to perform logical comparisons of the thrust readings from each channel prior to taking action on any single alarm condition The position transmitter unit is factory configured for use with an eddy current probe driver system The specific sensitivity is identified by four digits for example 200 immediately following the basic model number on the SKF Machine Condition Transmitter User Manual CMSS500 Series Transmitters Overview side label This number is the transducer sensitivity in mV mil For example 200 indicates the transducer has an output sensitivity of 200 mV mil Other sensitivities are available by special order Full scale option for the position transmitter unit is factory preset to O to 80 mils 40 0 40 O to 2 0 mm 1 0 0 1 0 CMSS570 Temperature Transmitter The CMSS570 is a 4 20 mA Temperature Transmitter It is factory configured for compatibility with a solid state temperature sensor or dual output vibration temperature sensor that provides a 10 mV deg K output The input signal is processed to provide temperature in Fahrenheit or Celsius The temperature transmitter is factory configured for use with transducers that provide a 10 mV degK output Full scale option for temperature transmitter units is fact
43. th Other Monitoring Systems For example the MCT CMSS530 and CMSS590 modules interface with equipment used for process control and data analysis Interfacing to Process Control Systems Interface options for process control systems are the static output 4 20 mA dc and the low power change over relay contacts The maximum load resistance of all connected instruments in the current loop is 500 Ohms Reference the section 4 20 mA Output in Chapter 2 for more information Interfacing to SKF Reliability Systems Products Consider the following interface options Use SKF Reliability Systems equipment to analyze MCT module readings Use MCT modules as a front end to on line condition monitoring equipment Figure 4 11 shows a combination of the above mentioned interface options 4 4 SKF Machine Condition Transmitter User Manual Installing the Machine Condition Transmitter Interfacing the MCT with Other Monitoring Systems Cable shield connected to sensor casing Sensor must be grounded Insulate sheld at transmitter side Multilog LOCAL MONITOR UNIT CMMA 320 INPUT 1 GND INPUT 1 SIGNAL Buffered Vibration Output MONITORING Use shielded twisted pair cable for connection between transmitter and analyzing equipment arni OFF LINE ON LINE Microlog s PROCESS CONTROL SYSTEM CMVA 60 DCSIPLC Input Resistor 1 to 5 Volt DC Power supply 24 V R 250 Ohm Pow
44. tiply feature This feature allows the user to temporarily double standard or triple jumper selectable the normal setpoints during periods of normal high vibration such as start ups To actuate the trip multiply feature the Tx terminal at the top of the alarm module must be closed to the adjacent COM terminal This may be done with an external switch dry contact relay or by shorting the terminals together by hand Important Do not apply voltage to either the Tx or COM terminals f several monitors are mounted together the Tx terminals may be daisy chained together and switched to COM system common as a group SKF Machine Condition Transmitter 3 7 User Manual CMSS500 Series Monitor Alarm Relays Alarm Relays The ALERT DANGER and OK relays are independent single pole double throw relays NO ARM and NC contacts are available through a plugable screw connector at the bottom of the monitor OK relay contacts are available on fixed screw terminals at the bottom front of the alarm module Relay contacts are rated 5 Amps at 30 Vdc or 125 Vac resistive load This rating includes any inrush current the load draws For loads that are not purely resistive the contact switching capability needs to be considered carefully in terms of this inrush current and rated accordingly The user is reminded to take care when applying relays The factory intended purpose of providing relay contacts is to operate relatively low pow
45. ure A 36 MCT Transmitter Only Side View SKF Machine Condition Transmitter A 3 User Manual Mounting and Outline CMSS500 SKF Machine Condition Transmitter User Manual Appendix B General Severity Level Guidelines When considering severity levels be aware that standards can only provide general guidelines to determine initial alarm settings Such guidelines should never substitute experience and good judgement The most reliable method of determining alarm settings is to trend vibration readings over time establish baseline values and alarm settings above baseline values Vibration measured in Velocity For vibration velocity ISO standards such as ISO 10816 First Edition 1995 or VDI 2056 guidelines are generally accepted ISO 10816 with the title Mechanical vibration Evaluation of machine vibration by measurements on non rotating parts consists of six parts Part 1 10816 1 determines general guidelines and is followed by the additional parts of ISO 10816 for example Part 2 10816 2 for land based steam turbines and generators in excess of 50 MW with normal operating speeds of 1500 RPM 1800 RPM 3000 RPM and 3600 RPM The following severity chart is in accordance with the ISO 10816 2 guidelines For exceptions to this guideline and for more information reference the ISO 10816 2 document SKF Machine Condition Transmitter B 1 User Manual General Severity Level Guidelines Vibration measured in Velocity
46. ve liability and Buyer s sole and exclusive remedy for any claim arising out of or related to any alleged deficiency in any Product sold by SKF even if such claim is based on tort including negligence or strict liability breach of contract or any other legal theory If the Product does not conform to this limited warranty Buyer must notify SKF or SKF s authorized service representative within thirty 30 days of discovery of the nonconformity provided however that SKF shall not be liable for any claim for which notice is received by SKF more than thirty 30 days following the expiration of the applicable warranty period for the Product Upon receipt of timely notification from Buyer SKF may at its sole option modify repair replace the Product or reimburse Buyer for any payment made by Buyer to SKF for the purchase price of the Product with such reimbursement being pro rated over the warranty period WARRANTY PERIOD Except as expressly provided below the warranty period for each Product shall commence on the date the Product is shipped by SKF to Buyer 90 DAY WARRANTY Products warranted for ninety 90 days by SKF are as follows cable assemblies MARLIN r QuickConnect MQC magnetic temperature probes and all refurbished equipment ONE YEAR WARRANTY Products warranted for one 1 year by SKF are as follows all Microlog r products and accessories all MARLIN r data managers MDM all MARLIN r Condition Detectors
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