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SKF CMSS6165 User Manual Download Page 16

Introduction to the SKF Strobe Light 

Display Panel / Definition of Buttons 

 

1 - 4 

Strobe Light 

 User 

Manual 

The Strobe Light is ideally suited for:  

Balancing 
Inspection of High Speed Rotating Parts 
Motion Analyses, or Phase Shift Measurement 
Over speed Trip Tests 
Online coupling Inspections 
RPM / RPS Measurements 
All applications suited to a general purpose, 
phase shifting stroboscope  

The Strobe Light can also be used as a highly 
accurate, remote electronic digital tachometer for 
direct measurement of RPM / RPS (speed) without 
special reflective tape or markings.  RPM results are 
updated and displayed approximately every half 
second on the LCD display. 

Display Panel / Definition of Buttons 

Display Panel 

The display panel consists of a backlit liquid crystal 
display with six numeric digits on top and five 
alphanumeric digits on the bottom, which indicate 
modes, flash rates, etc.   

Summary of Contents for CMSS6165

Page 1: ...e using this product Failure to follow the instructions and safety precautions in this manual can result in serious injury Keep this manual in a safe location for future reference User Manual Copyright 2009 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 ...

Page 2: ...SKF is a registered trademark of the SKF Group All other trademarks are the property of their respective owners SKF 2009 The contents of this publication are the copyright of the publisher and may not be reproduced even extracts unless prior written permission is granted Every care has been taken to ensure the accuracy of the information contained in this publication but no liability can be accept...

Page 3: ...clusive benefits offered only to our registered customers including receiving technical support tracking your proof of ownership and staying informed about upgrades and special offers Please visit our website for more details on these benefits Tell us how we re doing It s important that you re satisfied with the quality of our product user manuals We appreciate your feedback if you have comments o...

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Page 5: ...ntract 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 P...

Page 6: ...be Drivers and Eddy Probe Extension Cables Multilog On Line Monitoring system DMx 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 ...

Page 7: ...accelerometers and velocity transducers 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 wil...

Page 8: ... 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 lubri...

Page 9: ... 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 ...

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Page 11: ...3 How to Operate the Strobe Light 4 Powering on the Strobe Light 4 1 Operating Modes 4 1 Internal Mode Standard Strobe Operation 4 2 Internal Mode TACH Frequency Generator 4 5 External Input Mode 4 5 Tachometer Mode External Input Required4 6 External Delay Modes Phase Shifting 4 6 Lock Modes Accelerometer Input Required4 8 Power Up Features 4 10 Applications 5 Using the Stroboscope to Measure RPM...

Page 12: ...rs 6 Lamp and Fuse Replacement 7 Lamp Replacement 7 1 Fuse 7 3 Battery and Power Supply Specifics 8 Low Battery Indication 8 1 Charging the Batteries 8 2 External Power Supply Charger 8 3 Battery Disposal 8 3 Specifications 9 Internal Mode 9 1 External Modes 9 1 Tracking Accelerometer Mode 9 2 General 9 3 ...

Page 13: ...e of attack Objects viewed with this product may appear to be stationary when in fact they are moving at high speeds Always keep a safe distance from moving machinery and do no touch the target Lethal voltages are present inside this product Refer to the Lamp Replacement section before attempting to open this product Do not allow liquids or metallic objects to enter the ventilation holes on the st...

Page 14: ...or recovery of the metal and plastic components as the proper method of waste management Contact distributor for appropriate product return procedures This instrument is not user serviceable For technical assistance contact your SKF representative In order to comply with EU Directive 2002 96 EC on Waste Electrical and Electronic Equipment WEEE This product may contain material which could be hazar...

Page 15: ... signals This capability makes it different from general purpose strobe lights It also has a Narrow and Wide Bandwidth filter selection to discriminate fundamentals from harmonics The Narrow Bandwidth filter limits the influence of harmonics around the selected frequency providing a more stable phase reading The Strobe Light requires an input signal to synchronize the flash rate with an external s...

Page 16: ...a general purpose phase shifting stroboscope The Strobe Light can also be used as a highly accurate remote electronic digital tachometer for direct measurement of RPM RPS speed without special reflective tape or markings RPM results are updated and displayed approximately every half second on the LCD display Display Panel Definition of Buttons Display Panel The display panel consists of a backlit ...

Page 17: ... Indicates Auto Phase Shifting Mode virtual RPM is active ALT Indicates alternate function of each button lower section and knob will be used TACH Tachometer Mode active strobe won t flash LOCK Lock onto the accelerometer signal for input EXT External Input Mode active On Target Indicator for Tachometer Mode and Remote Sensor in External Mode Indicates input frequency exceeds the limit of the stro...

Page 18: ...M RPS Phase and Time In Auto Mode Cycles display through RPM RPS VRPM and VRPS ALT Function Toggles Tach Mode flashing on off Manually cycle through Internal External Wide Lock and Narrow Lock Modes ALT Function Memory Reads and Stores 9 preset flash rates Activates Alternate Function for buttons lower section and knob The ALT FUNCTION button toggles ALT in the display When ALT is displayed the bu...

Page 19: ...Introduction to the SKF Strobe Light Display Panel Definition of Buttons Strobe Light 1 7 User Manual ...

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Page 21: ...tteries The actual operating time of the stroboscope depends on the flash rate and duty cycle of operation The strobe can also be run continuously from the AC mains with the power supply supplied see Chapter 8 External Power Supply Charger Input Output Connections The Strobe Light has input and output jacks on the left side of the stroboscope These can be used for external triggering or synchroniz...

Page 22: ...pplied to the ring In the Lock modes the accelerometer signal is on the ring and the tip is unused The accelerometer can be powered externally ANALZ YES or by the strobe ANALZ NO See ANALZ menu for details When using external sensors that are powered by the Strobe Light e g Remote Optical Sensor the sensor must be connected before the stroboscope is powered on or the Common GND Pulse Output from S...

Page 23: ...ity of the input pulse can be set in the MENU options With no external input the output jack pointing away from socket provides a TTL compatible pulse from the strobe s internal oscillator If an external input is applied the output pulse is in sync with the input pulse This output pulse may be used to trigger a second stroboscope synchronously to illuminate larger areas Many strobes can be daisy c...

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Page 25: ...cycle through the main menu selections Once the desired menu option is displayed press the MENU button again to select it Press any other button to cancel selection Turn the black tuning knob to edit the menu option Press the MENU button to save your changes Press any other button to cancel Press any button other than MENU to exit the main menu DONE displays Below is a list of the menu items DECPT...

Page 26: ... Light User Manual BLANK Input Blanking Yes On or No Off ACCEL Select 10 mV g or 100 mV g for the accelerometer sensitivity ANALZ Select YES if using an analyzer to power the accelerometer or NO if using the strobe to power the accelerometer ...

Page 27: ...trigger will be held in place To unlock the stroboscope simply depress the trigger and then release Operating Modes The Strobe Light has five operating modes Internal Knob adjusts the flash rate External Input External signal is used to trigger the flash and the knob has no effect External Delay Phase Time and Auto Virtual RPM Enable the user to vary the stopped motion image at any point in the cy...

Page 28: ... FPM Turning the knob faster will adjust the FPM by larger steps When adjusting flash rate quickly turn the knob or use the x2 or 2 buttons to coarsely change the FPM Then slowly turn the knob for fine adjustments There are maximum and minimum values in each mode beyond which you cannot adjust If you are adjusting the rate and you reach a value which on the next increment would exceed the maximum ...

Page 29: ...on fan blades one can superimpose the blades on top of each other and check for blade tracking bent blades lead and lag tests etc For example A 3 bladed fan is spinning at 3600 RPM The strobe is flashing at 3600 FPM Press the ALT FUNCTION button to display ALT Then turn the knob counter clockwise 2 clicks The strobe will now flash at 10 800 FPM effectively 3600 times 3 The fan s blades are superim...

Page 30: ...ion is displayed press the MEMORY button to store the current flash rate in that location Press any other button to cancel DONE displays Internal Phase Delay Jog Once the flash rate has been adjusted to give a stopped motion image the PHASE DELAY button may be used with the knob to increase or decrease the phase of the reference mark location Use the PHASE DELAY button and knob to bring a referenc...

Page 31: ...and the strobe starts flashing again External Input Mode The strobe is in External Input Mode whenever there is a plug in the input jack When the strobe is in the External Input Mode EXT displays In the External Input Mode the user can not make any flash rate adjustments The flash rate is a function of the input signal This mode is used to synchronize the flash to an external event for example fro...

Page 32: ...d then the TACH button The TACH icon disappears External Delay Modes Phase Shifting There are three External Delay modes Phase Delay Time Delay Auto Virtual RPM External Phase Delay Mode In the External Phase Delay mode the flash is triggered 0 1 to 359 9 degrees after each external signal pulse The knob sets the amount of delay in degrees External Time Delay Mode In the External Time Delay mode t...

Page 33: ...n to cycle back to External only The PHASE TIME or AUTO icon disappears Lock Modes Accelerometer Input Required In the LOCK modes the vibration transducer accelerometer controls the flash rate Prior to setting the LOCK mode the strobe must be operated in Internal Mode The accelerometer must be properly connected and powered usually by the Microlog and must be mounted in place Once set up tune the ...

Page 34: ...lter s normal bandwidth If substantial levels of multiple fundamental frequencies or fundamentals with harmonics occur within a selected bandwidth the shaft reference may appear to oscillate or drift substantially when viewed with the Strobe Light Also if the accelerometer cannot be positioned on the primary point of interest a fundamental frequency of something other than that of the primary poin...

Page 35: ...mpts to track input RPM This is useful if you want to see how the vibration changes over a wide RPM range It will track as long as the RPM does not change too quickly As RPMs change the phase of the image is likely to change as the filter tracks To turn off Filter Tracking Press the ALT FUNCTION button and then the PHASE DELAY button The strobe displays NO TR for a moment Power Up Features When th...

Page 36: ...Features 4 10 Strobe Light User Manual then show the software revision REV x x and then go through a display diagnostic To restore factory programmed presets Press and hold the 2 button then turn on the strobe by depressing the trigger switch ...

Page 37: ...pe or paint in a single location to be used as a reference point Look only at the reference point If the speed of rotation is within the range of the stroboscope start at the highest flash rate and adjust the flash rate down At some point you will stop the motion with only a single reference point of the object in view Note that at a flash rate twice the actual speed of the image you will see two ...

Page 38: ...the full scale range of the stroboscope 50 000 FPM it can be measured using the method of harmonics and multipoint calculation Start at the highest flash rate and adjust the flash rate down You will encounter multiple images so be aware of these Note the flash rate of the first single image you encounter call this speed A Continue decreasing the flash rate until you encounter a second single image...

Page 39: ...ible to use below 300 FPM for inspection or to measure RPM Balancing and Phase Measurement The Strobe Light contains an internally tuned filter that is incorporated in a phase shifting network which allows the shaft reference mark to be directed at any convenient location on the machine while balancing or performing motion studies phase measurement along a machine s casing or along a machine train...

Page 40: ...the 1X first order filter which is necessary for repeatable phase measurements Set the Microlog to display averaged spectrum and phase data 4 or 8 averages Set transducer power to On Connect the proper interface cable between the strobe and the Microlog See wiring diagram to build the cable The Input and Output jacks are located on the left side of the strobe Connect the vibration transducer this ...

Page 41: ...eter signal output which is used as a TTL input to the Microlog for triggering Follow the operating instructions outlined at the beginning of this section for tuning the strobe to 1X running speed After the reference mark has been frozen as nearly as possible but slight rotation is acceptable press the INPUT MEMORY button until the LOCK icon displays The flash rate is now derived from the vibratio...

Page 42: ... to LOCK mode the filter in the strobe tracks slight changes in speed If the speed changes too much or too fast the strobe loses LOCK TRACK and stops flashing It will be necessary to switch back to Internal mode and repeat the adjustments Also try switching between the Narrow and Wide Bandwidth LOCK to optimize results Generally the Wide Bandwidth will give best tracking results and the Narrow Ban...

Page 43: ...e light in order to be assured the measurements you are making are correct The Microlog is not needed to do phase analysis You do need a method of powering the vibration transducer you can use a self generating velocity transducer to drive the strobe light or you can set ANALZ to YES in the menu and the strobe will power the vibration transducer accelerometer To prepare preparation for phase analy...

Page 44: ...transducer from the foundation to the base plate then to a foot then to an area above any split line and then to the bearing cap Note the phase angle at each of these locations The reference mark should stay at the 12 o clock position for each of these measurements If phase changes shifts probably to 6 o clock at any of these measurement points there is looseness at the mechanical joint To check f...

Page 45: ...misalignment condition can be the cause Motion Studies The Strobe Light can be a useful tool to determine how a mechanical support or a piping system is moving It allows the user to find points of maximum motion as well as minimum motion This is important if a new pipe hanger is to be installed or if a brace is going to be added to dampen a vibration condition For these tests the strobe light shou...

Page 46: ...tion noting the phase reading at each Do not move the strobe just the vibration sensor Do not change the Phase Angle control knob after the initial reference has been set The phase markings should walk around the clock face as the sensor is moved to each location Each time the marking is at or near 12 o clock the motion is at or near maximum and is in phase with the reference point Each time the m...

Page 47: ...nnot be obtained using an ROS if the strobe s flash is triggering the ROS The duration of the ROS pulse in response to the strobe s flash is about 0 5 milliseconds to 1 1 milliseconds depending on the flash rate This limits the largest delay possible because the flash swamps the signal from the ROS and consequently it will not provide the pulse from the reflective marker If large delays are desire...

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Page 49: ...cket screwdriver It is not necessary to remove any screws to replace the lamp To change the lamp Push apart the two tabs on the side of the reflector housing and remove the lens using a small screwdriver to help pry one tab and lift the lens Take care not to pry the tab any more than is necessary to free the lens The reflector is held in place by the front lens and will come loose but it is not ne...

Page 50: ... socket and gently rock the lamp while pushing it into place see Figure 4 Make sure the lamp is in straight and centered in the reflector hole Red Dots Figure 4 Lamp Replacement CAUTION Do not allow the reflector to contact the lamp Reinstall the reflector and then position the front lens in place matching up the notches on the lens with the two small tabs on the housing to prevent lens rotation s...

Page 51: ...l operating conditions the fuse within the stroboscope should never blow Examples of abnormal operating conditions would be foreign materials entering the strobe such as water pulp ink etc The Strobe Light has a resettable fuse which will reset once conditions are normal again ...

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Page 53: ...e batteries just prior to use When not in use the batteries should be charged at least every three months otherwise the battery capacity will be reduced or the batteries may become unusable Charge the batteries before use and allow 3 5 cycles of charging and discharging for batteries to reach full charge capacity The enclosure contains control electronics to properly and safely charge the batterie...

Page 54: ...y be charged at any time You do not need to wait until the low battery condition is indicated To charge the Strobe Light with the power supply charger Release the trigger so the strobe is off Connect the charging cable into the charging socket located below the display panel behind the handle Connect the charger into an AC mains wall outlet 115 230 Vac CAUTION Use of chargers other than the one su...

Page 55: ... mains wall outlet Press and lock the trigger switch to operate If the trigger switch is not pressed the unit will start charging Battery Disposal Prior to disposing of the Strobe Light the user must remove the Nickel Metal Hydride batteries To do this remove the lens reflector and lamp as detailed in the Lamp Replacement section This will expose four screws that must be removed so the reflector h...

Page 56: ...Battery and Power Supply Specifics Battery Disposal 8 4 Strobe Light User Manual returned to the factory The rest of the parts may now be disposed ...

Page 57: ...ctable 0 1 FPM max resolution above 9 999 99 FPM Display Update Rate Instantaneous External Modes Flash Range and Display 30 50 000 FPM External flash rates to 0 are acceptable Tachometer Measurements 5 to 250 000 RPM Accuracy 0 001 of reading or last digit Display Update Rate 0 5 second typical Trigger to Flash Delay 11 μsec Phase Delay Phase 0 1 to 359 9 degrees Time 0 01 to 1000 milliseconds Au...

Page 58: ... Measurements 100 to 50 000 RPM Accuracy 1 RPM Display Update Rate 0 5 second typical Trigger to Flash Delay 11 μsec Phase Delay Phase 0 1 to 359 9 degrees Time 0 01 to 1000 milliseconds Auto 0 to 200 VRPM Tracking Filter Selectable Wide and Narrow Bandwidths The filter may not lock below 100 FPM External Input 10 or 100 mV g accelerometer sensitivity menu selectable Positive or Negative edge trig...

Page 59: ... level On Target TIME AUTO ALT TACH LOCK and EXT icons Knob Adjustment Digital Rotary switch with 36 detents per revolution velocity sensitive Memory Last setting before power down is remembered and restored on next power up 9 user settable flash rates Output Pulse 40 μsec positive negative pulse menu selectable 3 3 Vdc typical Input Power Internal Rechargeable Batteries 6 Vdc External AC recharge...

Page 60: ...our at 6000 FPM with fully charged batteries Charge Time 4 5 hours typical Weight 1 875 lbs 0 8505 kg including batteries This product is designed to be safe for indoor use under the following conditions per IEC61010 1 Operating Temperature 32 F 104º F 0 C 40 C Safety thermal feature will set unit into TACH Mode stops flashing in the event of internal overheating Humidity Maximum relative humidity...

Page 61: ...Specifications General Strobe Light 9 5 User Manual ...

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Page 63: ...al 8 3 low battery indicator 8 1 Button 2 1 6 ALT FUNCTION 1 6 ALT 1 5 AUTO 1 5 DISPLAY TACH 1 6 EXT 1 5 INPUT MEMORY 1 6 LOCK 1 5 PHASE 1 5 PHASE DELAY 1 6 TACH 1 5 TIME 1 5 X2 MENU 1 6 Buttons 1 4 C Connections 2 1 input 2 1 output 2 1 D Display Panel 1 4 E Ext mode 2 2 External Delay Modes 4 6 External Input Mode 4 5 External Phase Delay Mode 4 6 External Time Delay Mode 4 6 F fan blades 4 3 ...

Page 64: ...ons ROS 6 1 limits stroboscope 1 5 Lock Modes 4 7 looseness checking for 5 8 M Menu 3 1 Microlog 5 4 5 6 Motion 5 9 O On Target Indicator 1 5 Operating Modes 4 1 External Delay 4 1 External Input 4 1 Internal 4 1 4 2 operating time 2 1 output 2 3 Output Connector 2 2 P Phase measuring 5 3 Phase Analysis measuring 5 7 Phase Delay Mode 1 5 power 2 1 Power external power supply 8 3 Power Supply 8 1 P...

Page 65: ... sensors 2 2 Specifications 9 1 External Modes 9 1 General 9 3 Internal Mode 9 1 Tracking Accelerometer Mode 9 2 Strobe Operation 4 2 T TACH Frequency Generator 4 5 Tachometer Mode 1 5 4 5 Time Delay Mode 1 5 trigger 2 2 U unbalance checking for 5 8 ...

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