Portable Digital Vibrometer PDV 100
Contents
1. 60 0 1 Figure 7 1 Frequency response of the low pass filter 100 kHz 7 3 7 Technical Specifications High Pass Filter Filter type analog 3rd order Butterworth Cutoff frequency 3dB 100Hz 10 switchable via the display Frequency roll off 60dB dec 7 2 3 Optics Laser Laser type helium neon Wavelength 633nm Cavity length 138mm Laser class 2 Laser output power typ 0 6mW Stand off distance m 0 1 ca 30 Aperture diameter 1 e typ mm typ 6 5 Spot size typ um 234mm 30 im 124 2m 250 3m 370 5m 616 each additional meter plus 130 depth of focus 2m distance mm 210 Visibility maxima mm 96 n 1384 Measured from the front edge of the retaining ring for the front lens refer to section 7 2 4 The maximum stand off distance depends on the surface properties of the object max 3dB loss of signal of the optimum nz0 1 2 7 4 7 Technical Specifications 7 2 4 Dimensions 85 e The connectors and cables require approx 100 mm free space at the rear side me e 6 ce i 100 di 128 5 X X 96 mm n 138 mm with n 0 1 2 Figure 7 2 Views of the PDV 100 Dimensions not specified are given in mm 7 3 Power Supply PDV AC Mains connection Mains voltage2. Polytec User Manual Portable Digital Vibrometer PDV 100 Warranty and Service The warranty for this equipment complies with the regulations in our general terms and conditions in their respective valid version This is conditional on the equipment being used as it is intended and as described in this manual The warranty does not apply to damage caused by incorrect usage external mechanical influences or by not keeping to the operating conditions The warranty also is invalidated in the case of the equipment being tampered with or modified without authorization To return the equipment always use the original packaging Otherwise we reserve the right to check the equipment for transport damage Please mark the package as fragile and sensitive to frost Include an explanation of the reason for returning it as well as an exact description of the fault You can find advice on fault diagnosis in chapter 6 Trademarks Brand and product names mentioned in this manual could be trademarks or registered trademarks of their respective companies or organizations Identification Labels PDV 100 Contents Contents 1 Safety Information 1 1 141 Laser Safety E 1 1 1 2 Laser Warning Labels I Lt RE Reuter eo eie peius 1 2 1 3 Electrical Safety ce eee He edad ae tee e TER oa ete tend rt dal et eene 1 3 1 4 safety when using lithium ion batteries 1
3. 4 1 Start up Preparing Cabling Switching on Measuring To make a measurement with the PDV proceed as follows Make sure that the beam shutter on the laser vibrometer is closed Position the laser vibrometer roughly so that its laser beam aperture points in the direction of the object under investigation If possible position the laser vibrometer at an optimal stand off distance to the object You will find information on optimal stand off distances in section 4 2 4 Plug the connecting cable of the power supply into the socket 12V on the back of the laser vibrometer The connection must be easy to plug in If not check the plug for bent contact pins to avoid serious damage being incurred Plug the power supply to a wall socket On the top ofthe laser vibrometer the display lights up Laser light is not yet emitted as the beam shutter is still closed From now on the laser needs a warm up period of approximately 20 minutes until it reaches the optimal operating temperature Before now opening the beam shutter remember the information on laser safety provided in section 1 1 Open the beam shutter To do so turn the corrugated ring on the front lens to the left when looking in the direction of the emitted laser beam The laser beam is now emitted from the laser vibrometer Focus the laser beam on the surface of the object using the focusing ring The signal to noise ratio is maximum if the signal level display fu
4. Figure 5 2 Example of the display The parameters are run through on the display in a circle using the selection key Co 5 2 5 Operating the PDV The cursor on the left side marks a selected parameter The parameter setting is changed with the key SET Adjusted settings are activated immediately As the control processor has a flash memory the settings are stored when the laser vibrometer is switched off and are reloaded when the laser vibrometer is switched on again This saves time when making adjustments for repeated measurements 5 6 2 Organization of the Menus The menu structure is shown in figure 5 3 SERVICE MODE Figure 5 3 Organization of the menus in the PDV The menus are organized as follows INTRO The start menu only appears after switching on the laser vibrometer After the menu INTRO is finished the display automatically changes to the main menu MAIN MENU In this menu all settings for a measurement are made i e the measurement range and the filters are selected It also displays the signal level SERVICE MODE In service mode the laser can be switched on and off In addition it provides information on the temperature in the laser vibrometer and test signals can be generated 5 6 3 The Individual Menus Menu INTRO Main menu After being switched on the laser needs a certain settling time During this settling time the menu INTRO plays Once it is finished the laser vibrometer ind
5. 2 Introduction 2 Introduction 2 1 Area of Application Polytec s Portable Digital Vibrometer PDV is used for non contact measurement of surface vibrational velocities The PDV is a compact portable laser vibrometer with state of the art design of optics and signal processing The PDV is shown in figure 2 1 Figure 2 1 View of the PDV 100 In the frequency range from 0 05Hz to 22kHz the handy PDV allows you to realize measurement accuracy which you previously needed a stationary measurement device in a calibration laboratory to achieve With the three measurement ranges which cover a velocity range of 0 05um s to 0 5m s and with precise digital filters you can optimally adapt the PDV to nearly all applications in the acoustic frequency range 2 1 2 Introduction 2 2 Measurement Principle 2 2 The PDV measures vibrational velocity according to the heterodyne interferometer principle which generates a high frequency carrier signal at the photo detector with the aid of a Bragg cell The beam of a helium neon laser is pointed at the vibrating object and scattered back from it Velocity and amplitude of a vibrating object generate a frequency or phase modulation due to the Doppler effect The object beam is thereby subjected to a small frequency shift which is described as the Doppler frequency fy The Doppler frequency is a function of the velocity component v in the direction of the object beam according to fp 2 Equation 2
6. A brief appearance of the overrange indicator does not necessarily mean the measurement signal is causing overrange as noise peaks caused by brief disruptions of the optical signal level can trigger the display However when using the filters it is also possible that an internal overload outside the frequency pass band has occurred In this case the overrange indicator would appear without overrange being apparent in the output signal Despite this the next highest measurement range would have to be selected to avoid waveform distortions 4 2 2 Low Pass Filter 4 2 The PDV is equipped with a switchable digital low pass filter Unlike usual with analog filters the three selectable cutoff frequencies 1kHz 5kHz and 22kHz mark the upper frequency limit for precise amplitude measurements flatness 0 1 dB but not the 3dB point The changeover to the stop band has a steep frequency roll off of 120dB dec resulting in an effective suppression of noise at higher frequencies The cutoff frequency of the low pass filter is set on the display in the line LP On the technical specifications as for example the frequency response of the low pass filter please refer to section 7 2 2 4 Making Measurements 4 2 3 High Pass Filter To suppress low frequency background vibrations the PDV has got a switchable high pass filter type 3rd order Butterworth with a cutoff frequency of 100Hz 3dB The high pass filter is switched on Y and off N on the di
7. laser type laser vibrometer specifications 7 4 Index laser vibrometer area of application 2 1 assembly 3 7 battery operation A 8 display 3 3 focusing ring use 5 1 inch thread mounting hole 3 5 jack ANALOG OUT 3 4 jack DIGITAL OUT 3 4 key SET 3 3 5 2 M5 mounting holes 3 5 M6 mounting holes 3 5 mains operation A 9 selection key control elements 3 3 selection key setting the parameters 5 2 signal level display on the display 5 2 socket 12V 3 4 using the beam shutter 5 1 laser warning labels 1 2 LC Display 3 3 liquid crystal display 3 3 lithium ion battery operating requirements 3 2 safety when charging 1 4 A 3 safety when using 1 3 A 2 low battery 5 6 low pass filter laser vibrometer specifications 7 3 selecting 4 2 setting LP 5 4 LP setting in the main menu 5 4 M M5 mounting holes 3 5 M6 mounting holes 3 5 main menu HP high pass filter 5 4 in the laser vibrometer 5 3 LP low pass filter 5 4 Velo measurement range 5 3 mains connection battery charger A 5 laser vibrometer 3 2 power supply 7 5 mains operation electrical connection 3 8 laser vibrometer A 9 mains voltage power supply specifications 7 5 maintenance requirements 3 2 malfunctions tests 6 1 measurement cabling and switching on 4 1 making 4 1 preparing 4 1 measurement principle 2 2 Index measurement range exceeding 4 2 laser vibrometer specifications 7 2 selecting 4 2 setting Velo 5 3 measurement signal analog output 5 6 digita
8. EN 61200 4 3 EN 61000 4 4 EN 61000 4 5 EN 61000 4 6 EN 61000 4 11 Ausgestellt von Issued by LM sul 13 November 2001 Polytec GmbH Datum Date Figure B 1 Declaration of conformity for the PDV 100 B 1 B Declaration of Conformity B 2 Index Numerics 12V on board plug socket connector laser vibrometer A 10 12V socket on the battery charger A 4 on the laser vibrometer 3 4 3rd order Butterworth 4 3 A accessories optional A 1 air circulation 3 2 ambient conditions battery charger specifications A 9 laser vibrometer specifications 7 1 operating requirements 3 2 ambient temperature high 3 2 amplitude error high pass filter 4 3 low pass filter 4 2 amplitude frequency response 4 3 analog measurement signal output 5 6 ANALOG OUT jack on the laser vibrometer 3 4 signal output laser vibrometer specifications 7 2 analog signal acquisition high pass filter 4 3 aperture diameter 7 4 applied standards 7 1 area of application laser vibrometer 2 1 assembly laser vibrometer 3 7 onto tripod with 3 axes head 3 7 onto tripod with fluid stage 3 7 B Batt empty warning on the display 6 2 battery low 5 6 operating time A 10 specifications A 10 taking back A 9 battery cable battery charger A 5 Index battery charger battery cable A 5 Charge LED A 5 charge level indicator A 5 charging battery A 6 control elements A 4 electrical safety 1 3 Fail LED A 5 identification label A 2 Laser L
9. Propagation delay Calibration accuracy 4V 0 5Hz 22kHz 24 bit 500 min 10kQ 0 5 additional error typ 94 of full scale max 10mV 0 02 E Az rms gt 90 dB lt 1 THD typ 1 1ms 1 20Hz 22kHz Measurement Ranges Ms pi Scaling factor Resolution Maximum range a Scag analog output zen acceleration peak mm s may A7 Hz m s 20 5 lt 0 02 2760 100 25 lt 0 02 13800 500 125 lt 0 1 69000 adjustable via the display The resolution is defined as the signal amplitude rms at which the signal to noise ratio is OdB in a 1 Hz spectral bandwidth RBW measured on 3M Scotchlite Tape reflective film 7 2 Signal Output DIGITAL OUT Digital output for the velocity signal Data format Frequency range Propagation delay Calibration accuracy Low Pass Filter Filter type Cutoff frequencies 0 1 dB Frequency roll off Stop band attenuation Frequency response S P DIF 24bit 48kSa s 0Hz 22kHz approx 1ms 0 2 0 05 Hz 22kHz digital FIR type 7 Technical Specifications 1kHz 5kHz 22kHz adjustable via the display gt 120dB dec gt 100dB see following table and figure 7 1 Pass band Stop band Filter setting 0 1dB attenuation gt 40dB 1kHz 0 5 Hz 1 kHz gt 4 3kHz 5 kHz 0 5 Hz 5 kHz gt 8 4 kHz 22 kHz 0 5Hz 22kHz gt 25 kHz dB 10 20 30 40 50
10. laser vibrometer 1 Analog voltage output ANALOG OUT BNC jack The voltage at this output is proportional to the instantaneous vibrational velocity of the object The voltage is positive when the object is moving towards the vibrometer optics 2 Digital signal output DIGITAL OUT Triax jack At this output the velocity information is available in S P DIF format Sony Philips Digital Audio InterFace e g to display the output signal on a PC monitor using a sound card 3 Connector for 12V DC voltage 4 pin circular connector Socket for the connecting cable of the power supply or for the battery cable 3 4 3 First Steps View from the The view from the bottom of the laser vibrometer is shown with the control bottom elements in figure 3 3 v LH 20 M6 1 4 20UNC w U Figure 3 3 View from the bottom of the laser vibrometer 1 Mounting holes M6 Using these two mounting holes the PDV can be mounted on cooling metal surfaces Three mounting holes M5 for optional tripod VIB A T02 Here the quick release plate of the optional tripod will be fixed refer to section 3 5 1 Mounting hole 1 4 20UNC Using this mounting hole the PDV can be mounted on camera tripods with an inch thread e g the optional tripod with 3 axes head VIB A T01 Identification label On the identification label you will find among other things the serial number of the instrume
11. middle position 2 Remove the protective cap from the battery cable connection of the battery and store the protective cap in a safe place Note If you carry the battery around with you in the carrier bag without using it or store it for a long time please make sure that you put the protective cap back on the battery cable connection 3 Connect the battery cable of the battery charger to the lithium ion battery Note The laser vibrometer can remain attached to the battery charger during the charging process but it is not switched on If you use the laser vibrometer during the charging process you will have to use a second plug in power supply PDV AC 4 Connect the cable of the of the plug in power supply PDV AC to the top of the battery charger and plug the power supply into a wall socket 5 Press the rocker switch on the battery charger in the direction of the charge level indicators The charging process starts with a lamp test in which all LEDS light up twice briefly After that the battery level is tested The yellow Test LED lights up The process can last up to 4 minutes but is completed after a few seconds as a general rule If the battery is faulty the red Fail LED will flash Caution Do not attempt to charge a faulty battery again or try to repair it Disconnect the faulty battery from the battery charger and dispose of the battery appropriately If the battery level i
12. round This needs to be done before the PDV is ready to use 7 Whenever you want to remove the laser vibrometer from the fluid stage you should hold the PDV while opening the safety lever 8 Keep the assembly instructions for the tripod and the fluid stage in a safe place 3 5 2 Electrical Connection Mains operation Battery operation optional 3 8 Only use the power supply PDV AC provided by Polytec The power supply has a wide range input and can be connected to all mains voltages with nominal values between 100V and 240V 1 Plug the connecting cable into the socket 12V on the back of the laser vibrometer The connection must be easy to plug in If not check the plug for bent contact pins to avoid serious damage being incurred 2 Plug the power supply to a wall socket The display on the laser vibrometer lights up and indicates that the PDV is ready to operate As an option you will get the carrier bag PDV BS with battery and battery charger Using the plug in power supply PDV AC supplied with the laser vibrometer PDV the battery charger can be connected up to all mains voltages with a nominal value of 100V to 240V You will find detailed information on this in section A 1 2 Before operating the laser vibrometer with a battery you have to charge the battery Refer also to section A 1 2 on this There you will also find further information on battery operation 4 Making Measurements 4 Making Measurements
13. several times until the following display appears Service Mode Laser On Quit service mode with the selection key and the laser remains switched on Displaying Temperature In service mode you can display the temperature in the laser vibrometer by pressing the key SET several times until the following display appears Service Mode Temp 30 5 The display shows the actual temperature in degrees Celsius You quit service mode using the selection key 5 Operating the PDV Generating Test Signals In service mode you can generate a sinusoidal test signal of 2 80 V RMS with a frequency of approx 1kHz This signal corresponds to 99 of the full scale and is available at the BNC jack ANALOG OUT on the back of the laser vibrometer To generate the test signal you proceed as follows 1 7 Paste a piece of reflective film enclosed in the manual on the measurement surface of the object under investigation Position the laser vibrometer at an optimal stand off distance to the object refer to section 4 2 4 Connect the object vibration free to the laser vibrometer and mount them onto a solid base Open the beam shutter and focus the laser beam on the reflective film with the focusing ring The bar graph display must fully light up Change into service mode by holding the key SET pressed and then press the selection key CZ Generate the 2 80V test signal by then pressing the key SET several times until the
14. the engine is running Note Use the red adapter for operation from a motor vehicle cigarette lighter Technical Specifications Connector Fuse Cable length 12VDC on board plug socket with built in fuse 2 A slow blow 4m B Declaration of Conformity Appendix B Declaration of Conformity CE Konformit tsbescheinigung Declaration of Conformity f r for Gegenstand Objekt Portable Digital Vibrometer Typ Model PDV 100 Zubeh r Typ Model Der Hersteller The manufacturer Polytec GmbH Polytec Platz 1 7 76337 Waidbrorin Germany best tigt das Einhalten der Richtlinien 89 338 EWG und 73 23 EWG confirms the compliance with the directive 89 336 EEC and 73 23 EEC Das Ger t stimmt berein mit den folgenden Normen The unit comply to the following standards EN 50825 1 Sicherheit von Laser Einrichtungen Safety of laser products EN 61010 Sicherheitsbestimmungen f r elektrische Me Steuer Regel und Laborger te Safety requirements for electrical equipment for measurement control and laboratory use EN 50081 1 Elektromagnetische Vertr glichkeit EMV Fachgrundnorm St raussendung Electromagnetic compatibility Emission EN 55022 Grenzwertklasse B FCC Class B EN 61000 3 2 EN 61060 3 3 EN 61000 6 2 Elektromagnetische Vertr glichkeit EMV Fachgrundnorm St rfestigkeit Electromagnetic compatibility Immunity EN 61000 4 2
15. the power supply to a wall socket The display on the top of the laser vibrometer lights up and indicates that the PDV is ready to operate Battery You switch the PDV on by connecting the vibrometer cable of the battery operation charger to the connector 12V on the back of the laser vibrometer and pressing the rocker switch on the top of the battery charger in the direction of the laser LED The display on the top of the laser vibrometer and the laser Led on the battery charger light up and indicate that the PDV is ready to operate For the PDV the battery level is shown on the display refer to section 5 8 Note The background lighting of the display is equipped with a power saving mode If no key is pressed for approximately 5 seconds the lighting is switched off but the readout on the display is still active 5 2 Blocking the Laser Beam The PDV is equipped with a beam shutter This can be used to block the laser beam without switching off the laser This keeps the system in thermal equilibrium The beam shutter is the corrugated ring on the front lens To block the laser beam turn the corrugated ring to the left when looking in the direction of the emitted laser beam Warning Only open the beam shutter when you are making measurements 5 3 Focusing the Laser Beam On the PDV the stand off distance can be adjusted using the focusing ring Before focusing the laser beam make sure that the clamping s
16. 1 Electrical safety IEC EN 61010 Safety requirements for electrical equipment for measurement control and laboratory use EMC IEC EN 50081 1 Electromagnetic compatibility EMC Emitted Class B interference IEC EN 61000 3 2 and 61000 3 3 Immunity to IEC EN 61000 4 2 and following interference 7 2 Laser Vibrometer PDV 100 7 2 1 General Data Power Supply Supply voltage 11V 14 5VDC Power consumption max 15W socket type Binder 718 768 M8 pin 1 internally used pin2 12V corresponding cable color white pin 3 internally used pin4 0 V corresponding cable color black Caution Do not connect the pins 1 and 3 as this causes damage to the PDV 100 Ambient Conditions Operating temperature 5 C 40 C 41 F 104 F Storage temperature 10 C 65 C 14 F 149 F Relative humidity max 80 non condensing 7 1 7 Technical Specifications Housing Protection rating Display Dimensions Weight Calibration Calibration recommended 7 2 2 Metrological Properties IP 64 LCD 3 line with background lighting refer to section 7 2 4 ca 2 6kg every 2 years Signal Output ANALOG OUT Signal voltage output for the velocity signal Output swing Frequency range Resolution of the D A converter Output impedance load resistance Overrange indicator threshold DC offset Best resolution Spurious free dynamic range SFDR Harmonic distortions
17. 1 y A 3 whereby A is the laser wavelength The Bragg cell also generates an optical frequency shift f in the reference beam 70 MHz After superimposing the measurement and the reference beam an electrical signal is generated at the photo detector with the instantaneous frequency fo t fg fp t fg 2 o Equation 2 2 This is a carrier frequency signal with the center frequency fg which is frequency modulated with the signed Doppler frequency fp t Through frequency demodulation the velocity signal can be decoded In the PDV the demodulation of the Doppler signal is purely based on a digital process In contrast to the conventional vibrometers which use analog this then means that the measurement accuracy is virtually independent of aging and environmental influences State of the art DSP technology makes it possible to realize excellent measurement system characteristics despite the compact design and minimal energy consumption By using a serial Interface proven in digital audio technology the output signal can be fed into the digital inputs of modern recording devices or signal analyzers without any loss of accuracy For the conventional type of signal processing an analog signal output with 24bit amplitude resolution is also available 3 First Steps 3 First Steps 3 1 Unpacking and Inspection Unpacking Inspection The scope of supply consists of the following components e laser vibrometer PDV 100 e plug
18. 100 240 VAC 10 50 60 Hz Output voltage 12VDC Power consumption max 20W Housing Protection rating with protective insulation IP 40 Cable length 3m 7 5 7 Technical Specifications 7 4 Mounting Plate OFV P7 Dimensions 110 55 30 7 220 p2 La 190 120 ERBEN ff 95 D 60 o gt N 3450 O NERE e Y 10 i 0 13 40 40 ua pe NE a n je s EG E Figure 7 3 Views of the mounting plate OFV P7 dimensions not specified are given in mm 7 6 7 5 Table of the Visibility Maxima 7 Technical Specifications Visibility maxima in mm 96 1200 2304 3408 4512 5616 234 1338 2442 3546 4650 5754 372 1476 2580 3684 4788 5892 510 1614 2718 3822 4926 6030 648 1752 2856 3960 5064 6168 786 1890 2994 4098 5202 6306 924 2028 3132 4236 5340 6444 1062 2166 3270 4374 5478 7 7 7 Technical Specifications 7 8 A Optional Accessories Appendix A Optional Accessories A 1 CarrierBag PDV BS with Battery and Battery Charger The carrier bag PDV BS contains the following components e Lithium ion battery PDV LI e Battery charger PDV CH Optional e Motor vehicle supply cable PDV DC e Reserve lithium ion battery PDV LI The carrier bag PDV BS with the PDV 100 is shown in figure A 1 If required you can store add
19. 3 1 5 Safety when Charging the Lithium lon Battery nn nnnnenn nn 1 4 2 Introduction 2 1 2 1 Area of ApplicatiOn iol ee er REDE teet ie ARE i ete a etse dian Robie 2 1 2 2 Measurement Principle us ene eee hens h m ea nnn ne nnne nnns 2 2 3 First Steps 3 1 3 1 Unpacking and Inspection 3 1 3 2 Operating and Maintenance Requirements sssssssssssssseeem en 3 2 3 9 Control Elements an Eo d ista inet Fede die eda RN apis be AE ERRARE TELA er herren 3 3 3 4 Functional Test 2 sets M ee bat osea elite E Mia EM e ete dun 3 6 3 5 Installation a erar IRE RI a edo ep tup e be Re e ede tan esta 3 7 3 5 1 Assembly 3 ace Ee Loir E eoo He elek 3 7 3 5 2 Electrical Connection eiae eet ee ee 3 8 4 Making Measurements 4 1 Al Start up secte Xe Re dard M d UE rea 4 1 4 2 Selecting Suitable Settings 444 Luis nennt nnns nsn ada ne sona dedu 4 2 4 2 1 Measurement Range nennen nannnnn denen nh nasse sn nnn erre sen pn hab en se nnn nn en 4 2 4 2 2 Low Pass Filter inpet e ahnen A D qe Hee odas 4 2 42 3 Hoh Pass Filter sera ius repeto iE eod lebe ea RIP osea pot pata 4 3 4 2 4 Optimal Stand off Distances 4 4 5 Operating the PDV 5 1 5 1 Switching On and Off re Renee ene t da dede are e edad ne ren dde 5 1 5 2 Blocking the Laser Beam issues 5 1 5 3 Focusing the Laser Beam ssh nnne M RE RE nenne Ih ER nahen sh Rn nhe n nih nenne 5 1 5 4 Using the Signal Level Display 5 2 9 9 Fixing the Focal Po screen Ne nehm 5 2 5 6 Se
20. 3 signal level display on the laser vibrometer 5 2 signal output ANALOG OUT laser vibrometer specifications 7 2 DIGITAL OUT laser vibrometer specifications 7 3 socket 12V on the battery charger A 4 on the laser vibrometer 3 4 socket type laser vibrometer specifications 7 1 specifications technical applied standards 7 1 battery A 10 battery charger A 9 carrier bag A 10 dimensions 7 5 laser vibrometer general data 7 1 laser vibrometer metrological properties 7 2 motor vehicle supply cable A 10 optics 7 4 power supply 7 5 spot size 7 4 Index standards applied B 1 applied specifications 7 1 stand off distance laser vibrometer specifications 7 4 optimally select 4 4 storage temperature battery charger specifications A 9 laser vibrometer specifications 7 1 storage battery A 7 suitable settings high pass filter 4 3 low pass filter 4 2 measurement range 4 2 optimal stand off distance 4 4 selecting 4 2 sunlight operating requirements 3 2 supply voltage battery charger specifications A 9 laser vibrometer specifications 7 1 switch operating modes battery charger A 4 switching off laser in service mode 5 4 switching on laser in the service mode 5 4 on functional test 3 6 on measuring 4 1 PDV in battery operation 5 1 PDV with power supply 5 1 T table visibility maxima 7 7 technical specifications applied standards 7 1 battery A 10 battery charger A 9 carrier bag A 10 dimensions 7 5 lase
21. 6 2 No Measurement Signal If the laser beam is emitted but there is no measurement signal proceed as follows 1 Put a matt white test surface e g a piece of paper in the beam path approximately 23cm away from the retaining ring for the front lens Focus the laser beam on the test surface using the focusing ring Does the signal level display react If the signal level display does not react either the optics or the input section of the electronics are faulty Connect an oscilloscope to the BNC jack ANALOG OUT on the back of the laser vibrometer and check if the output reacts to moving the test surface Note Pay attention to the high pass filter being switched off HP N Otherwise you have to move the test surface rapidly 3 If the output does not react check if a significant DC offset is indicated Normally a DC voltage less than 10mV can be measured Set the oscilloscope to 1V DIV and block the laser beam Is the output signal noisy or does the oscilloscope show a straight line Noise must occur when the laser beam is blocked 6 3 Focusing Ring can not be Moved Make sure that the clamping screw on the focusing ring is undone refer to section 5 5 6 2 7 Technical Specifications 7 Technical Specifications 7 1 Standards Applied Laser safety EN60825 1 Safety of Laser Products complies to US 21 CFR 1040 10 and 1040 11 except for deviations pursuant to Laser Notice no 50 dated 26 July 200
22. ALOG OUT on the back of the laser vibrometer set the oscilloscope to 1V DIV and move the test surface Note Pay attention to the high pass filter being switched off HP N Otherwise you have to move the test surface rapidly If the voltage shown on the oscilloscope reacts to the movement of the test surface the decoder and output section are working correctly If the functional test has been successful you can now install the PDV in the measurement location as described in section 3 5 If your PDV does not perform as described above read through the information on fault diagnosis in chapter 6 and if necessary contact your local Polytec representative 3 5 Installation 3 5 1 Assembly Assembly onto tripod VIB A T01 Assembly onto tripod VIB A T02 3 First Steps The PDV has several threaded holes on the underside to mount the laser vibrometer Two mounting holes M6 to mount the PDV on cooling surfaces if necessary One mounting hole 1 4 to mount the PDV on a camera tripod for example the optional tripod with 3 axes head VIB A T01 Three mounting holes M5 to mount the PDV onto the optional tripod with fluid stage VIB A TO2 Before attempting to mount the laser vibrometer all locking mechanisms of the tripod particularly screws should be checked to make sure they are tight Loose screws may cause the tripod to be unstable and possibly collapse Proceed with the assembly as follows 1 Assemble
23. ED A 5 mains connection A 5 operating requirements 3 2 socket 12V A 4 switch for operating modes A 4 technical specifications A 9 Test LED A 5 vibrometer cable A 4 battery check display A 5 battery fault display A 5 battery level indicator 5 6 battery operation electrical connection 3 8 laser vibrometer A 8 battery lithium ion safety when charging A 3 safety when using A 2 beam shutter control elements 3 3 on the laser vibrometer 5 1 blocking the laser beam before measuring 5 1 control elements 3 3 Bragg cell 2 2 C cable connection power supply of battery charger A 4 power supply of the laser vibrometer 3 4 cable length battery charger specifications A 9 cabling on functional test 3 6 on measuring 4 1 calibration laser vibrometer specifications 7 2 recommended 7 2 carrier bag PDV BS components A 1 specifications A 10 cavity length laser vibrometer specifications 7 4 optimal stand off distances 4 4 Charge LED on the battery charger A 5 charge level indicator battery charger A 5 Index charging battery information on A 7 procedure A 6 charging current battery charger specifications A 9 charging process display A 5 charging time battery charger specifications A 9 clamping screw on the focusing ring 3 3 cleaning of the front optics 3 2 of the housing surfaces 3 2 components carrier bag PDV BS A 1 Unpacking 3 1 conformity declaration of B 1 connecting cable 3 2 control elements b
24. arging process after 2 3 hours for batteries which are to be stored at the latest when the 50 LED lights up Batteries which have been stored for a long time must be completely recharged before being used The battery charger can also be operated using the motor vehicle supply cable PDV DC refer to section A 2 To do so instead of plugging the plug in power supply into the 12 V socket on top of the battery charger plug in the motor vehicle supply cable and plug it into a 12V on board plug socket or into a motor vehicle cigarette lighter The battery is charged in the same way as with mains operation To charge a reserve battery connect it to the battery cable of the battery charger instead of the first battery Caution Only use original lithium ion batteries from Polytec A 7 A Optional Accessories Battery operation A 8 To operate the laser vibrometer with a battery please proceed as follows 1 Make sure that the rocker switch on the top of the battery charger is in the middle position 2 Plug the vibrometer cable of the battery charger into the 12 V socket on the back of the laser vibrometer and secure the jack with the knurled nut The connection must be easy to plug in If not check the plug for bent contact pins to avoid serious damage being incurred 3 Press the rocker switch in the direction of the Laser LED The green Laser LED on the battery charger and the display on the laser vibrometer light
25. ass filter 4 3 low pass filter 4 2 front optics cleaning 3 2 functional description battery charger A 4 functional test cabling and switching on 3 6 preparing 3 6 testing 3 6 G general data laser vibrometer specifications 7 1 generating test signal OV in the service mode 5 5 test signal 2 80V in service mode 5 5 H heterodyne interferometer 2 2 high pass filter analog signal acquisition 4 3 laser vibrometer specifications 7 4 selecting 4 3 setting HP 5 4 housing battery charger specifications A 9 battery specifications A 10 laser vibrometer specifications 7 2 opening 3 2 power supply specifications 7 5 housing surfaces cleaning 3 2 HP setting in the main menu 5 4 I identification label battery charger A 2 laser vibrometer 3 5 immunity to interference EMC standards 7 1 inch thread mounting hole 3 5 inspection when unpacking 3 1 installation electrical 3 8 mechanical 3 7 INTRO menu in the laser vibrometer 5 3 J jack on the laser vibrometer ANALOG OUT 3 4 DIGITAL OUT 3 4 K key SET on the laser vibrometer 3 3 using 5 2 L laser switching off in service mode 5 4 switching on in the service mode 5 4 laser beam blocking 3 3 5 1 focus optimizing 5 2 focusing 3 3 5 1 laser cavity length 4 4 laser class laser vibrometer specifications 7 4 Laser LED on the battery charger A 5 laser power laser vibrometer specifications 7 4 laser safety 1 1 applied standards 7 1 standards applied B 1
26. attery charger A 4 bottom view 3 5 rear view 3 4 view from above 3 3 control processor 5 3 cooling 3 2 cursor moving 3 3 on the display 5 3 D declaration of conformity B 1 depth of focus 7 4 digital filter principle 4 2 digital measurement signal output 5 6 DIGITAL OUT jack on the laser vibrometer control elements 3 4 signal output laser vibrometer specifications 7 3 dimensions laser vibrometer specifications 7 5 mounting plate 7 6 display battery level indicator 5 6 cursor 5 3 example of the 5 2 menu structure 5 3 on the laser vibrometer 3 3 overrange indicator 5 6 setting parameters 5 2 displaying temperature in service mode 5 4 Doppler effect 2 2 E electrical connection battery operation 3 8 mains operation 3 8 electrical installation 3 8 electrical safety applied standards 7 1 battery charger 1 3 plug in power supply 1 3 power supply 1 3 standards applied B 1 EMC standards applied declaration of conformity B 1 specifications 7 1 emitted interference EMC standards 7 1 exceeding the measurement range 4 2 F Fail LED battery charger A 5 fault diagnosis information on 6 1 no laser beam 6 1 no measurement signal 6 2 warning on the display 6 1 filter principle digital 4 2 flash memory 5 3 focus optimizing 5 2 focusing close up 5 1 on infinity 5 1 ring 3 3 the laser beam 5 1 focusing ring control elements 3 3 use when measuring 5 1 frequency demodulation 2 2 frequency roll off high p
27. ature heat accumulation fire or explosion leading to serious personal injury Please pay attention to the following safety precautions when using lithium ion batteries e Do not throw the battery into fire or expose it to extreme heat e Do not leave the battery in the direct sun near a radiator or in a closed car on a warm day e Do not reconstruct disassemble deform or short circuit the battery e Do not touch the terminals of the battery with metal objects such as necklaces keys coins and hairpins Replace the protective cap on the battery cable connector if the battery is being stored e Do not allow the battery to come into contact with sea water or water of any kind e Do not drop the battery or subject it to great shocks e Do not use any batteries which are emitting a fluid or which show external damage A Optional Accessories Safety when Charging the Lithium lon Battery Warning Incorrect use of the battery may result in an excessive rise in temperature heat accumulation fire or explosion leading to serious personal injury Please pay attention to the following safety precautions when charging the lithium ion battery e To charge the battery only use the battery charger provided by the manufacturer e Never connect the battery directly to a mains supply or an on board plug socket e While charging do not place the battery in direct sunlight If the battery gets too hot a built in safe
28. ays switch the beam shutter off Only when the PDV is roughly in place open the beam shutter Do not use any reflective tools watches etc when you are working in the beam path of the laser Caution Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure 1 Safety Information 1 2 Laser Warning Labels Warning labels Position 1 2 The laser warning labels for the PDV are shown in figure 1 1 In the countries of the European Union EU label 2 is affixed in the national language of the customer Laser Radiation 2 Laserstrahlung Do not stare into beam Nicht in den Strahl blicken Class 2 Laser Product Laser Klasse 2 According to IEC EN 60825 1 2001 Complies with 21 CFR 1040 10 and Nach EN 60825 1 2001 1040 11 except for deviations pursuant to P lt 4 mW cw 620 700 nm Laser Notice no 50 dated 26 July 2001 m i P lt 1 mW cw 620 700 nm Figure 1 1 Laser warning labels for the PDV The position of the laser warning labels on the PDV is shown in figure 1 2 Figure 1 2 Position of the laser warning labels on the PDV 1 Safety Information 1 3 Electrical Safety PDV Power supply Battery charger optional The PDV is designed to be used powered by a low voltage nominally 12V DC provided externally which is accessible for constructional reasons Due to the
29. crew on the focusing ring is undone refer to section 5 5 When looking in the direction of the emitted laser beam focus the laser beam as follows e Focus on infinity Turn to the right e Focus close up Turn to the left Please pay attention to the information on optimal stand off distances provided in section 4 2 4 5 1 5 Operating the PDV 5 4 Using the Signal Level Display The signal level display helps you to optimize the focus of the laser beam The signal level is shown as a bar on the display of the laser vibrometer refer to section 5 6 1 The length of the bar is a measure of the amount of light scattered back from the object under investigation 5 5 Fixing the Focal Point You can fix the focus by locking the focusing ring using the clamping screw To do so first focus the laser beam and then hand tighten the clamping screw with the provided Allen key size 1 5mm Clamping screw gt lt Polytec Figure 5 1 Clamping screw on the focusing ring 5 6 Setting Parameters via the Display 5 6 1 Philosophy The PDV is operated via the display using the selection key and the key SET Selection key Using the selection key within the menus a parameter is selected gt Key SET Using the key SET the setting of the selected p parameter is changed The main menu is shown in figure 5 2 as an example of the display Velo 500 LP 22 HP N
30. cular jack Cable to connect up the laser vibrometer Note Secure the cable junction at the laser vibrometer with the knurled nut When disconnecting the cable always pull the plug and not the cable A 4 Mains connection A Optional Accessories 4 Battery cable with 3 pin circular jack Cable to connect up the lithium ion battery 5 Charge level indicator 100 LED The green 100 LED lights up when the battery has attained its specified capacity While this LED is lit up the battery is still charging to attain the maximum capacity possible The green 100 LED flashes when the charging process has completely finished and the battery is switched off You can then switch off the battery charger using the rocker switch 6 Charge level indicator 50 LED The yellow 50 LED lights up when the battery has attained at least half its capacity This is not equivalent to half the duration of the charging process 7 Charge level indicator Charge LED The yellow Charge LED lights up when the charging process starts and during the entire charging process 8 Test LED for the battery check The yellow Test LED lights up while the battery level is being tested This can take up to 4 minutes refer also to Charging battery 9 Fail LED The red Fail LED flashes if the battery is not connected or is faulty First of all check the connection of the battery cable With an exhaustively discharged battery the Fail LED can also init
31. ectrical safety 1 3 laser vibrometer specifications 7 1 specifications 7 5 wide range input 3 2 preparing functional test 3 6 measurement 4 1 protection rating battery charger specifications A 9 laser vibrometer specifications 7 2 power supply specifications 7 5 Q quit the service mode 5 4 R radiant heat operating requirements 3 2 rear view control elements 3 4 relative humidity battery charger specifications A 9 laser vibrometer specifications 7 1 return 3 1 S S P DIF format 3 4 safety electrical 1 3 laser 1 1 lithium ion batteries charging A 3 using lithium ion batteries A 2 when charging lithium ion batteries 1 4 when using lithium ion batteries 1 3 safety information battery charger A 2 electrical safety plug in power supply A 2 scaling factor 4 2 selecting high pass filter 4 3 low pass filter 4 2 measurement range 4 2 optimal stand off distance 4 4 suitable settings 4 2 selection key on the laser vibrometer 3 3 using 5 2 serial number of the laser vibrometer 3 5 service mode displaying temperature 5 4 generating test signal OV 5 5 generating test signal 2 80V 5 5 in the laser vibrometer 5 4 quit 5 4 switching off the laser 5 4 switching on the laser 5 4 settings changing 3 3 high pass filter 4 3 HP 5 4 in service mode 5 4 in the main menu 5 3 low pass filter 4 2 LP 5 4 measurement range 4 2 on the display 5 2 optimal stand off distance 4 4 selecting suitable 4 2 Velo 5 3 settling time 5
32. een 10 C and 30 C 50 F and 86 F when charging the batteries 3 First Steps 3 3 Control Elements View from The view from above of the laser vibrometer is shown with the control above elements in figure 3 1 Q Polytec PORTABLE DIGITAL VIBROMETER PDV 100 i Figure 3 1 View from above of the laser vibrometer Beam shutter Beam shutter to block the laser beam refer to section 5 2 Warning Only open the beam shutter when you are making measurements Focusing ring Ring to focus the laser beam refer to section 5 3 Clamping screw for the focusing ring Allen screw to fix the focusing ring after focusing the laser beam refer to section 5 3 Liquid Crystal Display LCD with background lighting The display shows the settings of the vibrometer The organization of the display and how to use it to operate the vibrometer is described in detail in section 5 6 Selection key lt Using this key the cursor is moved in a circle on the display from one parameter to the next The cursor is used to select the parameter which should be changed refer to section 5 6 SET key Using this key the setting of the selected parameter is changed refer to section 5 6 3 3 3 First Steps Rear view The rear view of the laser vibrometer is shown with the control elements in figure 3 2 Figure 3 2 Rear view of the
33. following display appears Service Mode Output Full The 2 80 V test signal with approximate full scale is only emitted while this display is shown This signal is there to check the calibration of the analog signal voltage output Quit service mode using the selection key CZ In service mode you can generate a test signal of OV at the BNC jack ANALOG OUT on the back of the laser vibrometer To do so proceed as follows 1 Change into service mode by holding the key SET pressed and then press the selection key CZ Generate the 0 V test signal by then pressing the key SET several times until the following display appears Service Mode Output Zero The OV test signal is only emitted while this display is shown 5 5 5 Operating the PDV 3 Quit service mode using the selection key lt 5 7 Overrange Indicator The overrange indicator is shown on the display of the laser vibrometer on the right next to the measurement range indicator Velo refer to figure 5 4 gt Velo 100 LP 22 HP N Figure 5 4 Display with overrange indicator If the overrange indicator is lit up continuously it means that the measurement range set is being exceeded In this case the next highest measurement range must be set You will find further information on setting the measurement range in section 4 2 1 5 8 Battery Level Indicator The battery level indicator is shown on the display of the laser vibromete
34. he battery e Do not touch the terminals of the battery with metal objects such as necklaces keys coins and hairpins Replace the protective cap on the battery cable connector if the battery is being stored e Do not allow the battery to come into contact with sea water or water of any kind e Do not drop the battery or subject it to great shocks e Do not use any batteries which are emitting a fluid or which show external damage 1 Safety Information 1 5 Safety when Charging the Lithium lon Battery 1 4 Warning Incorrect behavior when charging the battery may result in an excessive rise in temperature heat accumulation fire or explosion leading to serious personal injury Please pay attention to the following safety precautions when charging the lithium ion battery To charge the battery only use the battery charger provided by the manufacturer Never connect the battery directly to a mains supply or an on board plug socket While charging do not place the battery in direct sunlight If the battery gets too hot a built in safety device is activated preventing the battery from charging further Heating the battery can destroy this safety device and can cause an explosion or ignition of the battery If the given charge time for the battery is significantly exceeded without the battery reaching full capacity please abort the charging process Doing so may cause the battery to overheat explode or ignite
35. ially flash Switch the battery charger off and then on again As a general rule the fault state will not occur again the second time If the fault state persists then there is a fault with the battery Disconnect the battery from the battery charger Caution Do not attempt to charge a faulty battery again or try to repair it Disconnect the faulty battery from the battery charger and dispose of the battery appropriately 10 Laser LED The green Laser LED lights up when you have pressed the rocker switch in the direction of the Laser LED Thus the laser vibrometer is switched on and the battery charger is switched off Using the plug in power supply PDV AC supplied with the laser vibrometer PDV the battery charger can be connected up to all AC systems with a nominal voltage of 100V to 240V To do so connect the cable of the plug in power supply with the 12V circular jack on the top of the battery charger and plug the power supply into a wall socket Note Before connecting the plug in power supply to the mains voltage check whether the plug in power supply is equipped with a socket inset suitable for your country If not contact your nearest Polytec representative A 5 A Optional Accessories Charging Before operating the laser vibrometer with a battery you have to charge the battery battery To do so proceed as follows 1 Make sure that the rocker switch on the top of the battery charger is in the
36. icates that it is ready to operate by automatically changing to the main menu You can shorten the menu INTRO by pressing any key on the laser vibrometer The measurement range and the filters are set in the main menu The individual settings are described in the following Velo In this line you can set the velocity measurement range in mm s full scale You will find information on setting the measurement range in section 4 2 1 5 3 5 Operating the PDV Service mode 5 4 LP At this point along the line you can set the cutoff frequency of the low pass filter in KHz You will find information on setting the low pass filter in section 4 2 2 HP At this point along the line you can set the high pass filter Setting Y means that the high pass filter is switched on and setting N means that it is switched off You will find information on setting the high pass filter in section 4 2 3 Service mode is there to check and calibrate the PDV You can access service mode by holding the key SET pressed and then press the selection key lt In service mode you can set the following operating modes Switching Laser Off and On In service mode you can switch the laser off by pressing the key SET several times until the following display appears Service Mode Laser Off Quit service mode with the selection key and the laser remains switched off In service mode you can switch the laser on again by pressing the key SET
37. ies different from ordinary light sources Laser light is generally extremely intense due to the beam s low divergence Great care should be taken when handling lasers that the direct or reflected beam do not enter the eye To ensure this the following precautions have been taken e In general Polytec equipment complies with the standards IEC EN 60825 1 and US 21 CFR 1040 10 and 1040 11 except for deviations pursuant to Laser Notice no 50 dated 26 July 2001 e The optical output of the laser is less than 1mW providing the equipment is used in the manner for which it was intended This means that the PDV conforms with laser class 2 Il and is generally very safe Even when optimally focused the laser light is not intense enough to harm the skin e The PDV is equipped with a beam shutter which can be used to block the laser beam during the warm up phase or when the PDV is not in use although switched on e The display on the laser vibrometer indicates whether the laser is active and thus whether there is potential danger from emitted laser beams Itis not necessary to open the housing when using the PDV as intended Opening the housing will invalidate the warranty Please pay attention to the following safety precautions when using the PDV e Avoid looking directly into the laser beam with the naked eye or with the aid of mirrors or optical instruments e Only open the beam shutter when making measurements e To position the PDV alw
38. ility maxima 4 4 The light source of the PDV is a helium neon laser This is a multi mode laser in which a maximum of two modes can exist The interference of the two modes leads to the intensity of the resulting optical signal varying periodically with the stand off distance The intensity increases to a maximum i e maximum visibility is present if the difference of the optical path length is an integer multiple of the laser cavity length 138mm As the optical path difference is equal to twice the stand off distance the beam goes there and back maximum visibility is present once per cavity length In practice it is not usually necessary to search for maximum visibility as the PDV is even sensitive enough to make a measurement close to the minimum A visibility minimum is indicated during the warm up phase by periodic fluctuation of the optical signal level You should however select the stand off distance so that it is close to a visibility maximum The stand off distance is measured from the front edge of the retaining ring for the front lens refer to section 7 2 4 The optimal stand off distances are optimal stand off distance 96mm n I mm n 0 1 2 138mm i e for 138mm the optimal stand off distances are at 96mm 234mm 372mm 510mm etc refer also to section 7 2 3 and section 7 5 5 Operating the PDV 5 Operating the PDV 5 1 Switching On and Off Power supply You switch the PDV on by connecting
39. in power supply PDV AC e carrier bag e digital audio cable Triax RCA e 1 Allen key size 1 5mm e 1 sheet reflective film 3M Scotchlite Tape enclosed in the manual optional e carrier bag PDV BS with integrated lithium ion battery PDV LI rechargeable and battery charger PDV CH e motor vehicle supply cable PDV DC for the PDV being operated at a 12V on board plug socket or a motor vehicle cigarette lighter e tripod with 3 axes head VIB A T01 e tripod with fluid stage VIB A T02 Caution Handle the front optics with care Dirt may only be removed using a soft dry cloth an optics brush and bellows Please pay attention to the following steps when unpacking 1 After unpacking check all components for external damage scratches loose screws etc 2 Check the packaging for signs of unsuitable handling during transport 3 Inthe case of a wrong delivery damage or missing parts inform your local Polytec representative immediately and give them the serial number of the instrument The identification label can be found on the underside of the instrument and also on the inside cover of this manual 4 Carefully retain the original packaging in case you have to return the instrument After unpacking carry out a first functional test as described in section 3 4 3 1 3 First Steps 3 2 Operating and Maintenance Requirements Ambient conditions Mains connection Cooling Connecting cable Warmi
40. insulation used and the encased construction the high voltage of the laser created internally can not be accessed even in the case of malfunction Protective grounding of the completely closed metal housing is therefore not necessary To reduce the risk of an electric shock or malfunction only use the plug in power supply PDV AC provided by the manufacturer Do not expose the plug in power supply to rain or moisture It is not necessary to open the housing when using the power supply as intended Always use the correct plug adapter Lithium ion batteries require a very strict compliance with the charging parameters For this reason only use the battery charger PSV CH provided by Polytec Using any other battery chargers may result in fire or explosion of the battery Note When loading the batteries it is recommended to open the cover of the carrier bag to ensure unimpeded air circulation 1 4 safety when using lithium ion batteries Warning Incorrect use of the battery may result in an excessive rise in temperature heat accumulation fire or explosion leading to serious personal injury Please pay attention to the following safety precautions when using lithium ion batteries e Do not throw the battery into fire or expose it to extreme heat e Do not leave the battery in the direct sun near a radiator or in a closed car on a warm day e Do not reconstruct disassemble deform or short circuit t
41. itional PDV accessories in the pockets and under the straps of the carrier bag Figure A 1 Carrier bag PDV BS with battery battery charger and PDV 100 The electrical installation of the carrier bag makes it possible to use the laser vibrometer as a mobile unit with the power supplied by the lithium ion battery or as a Stationary unit connected up to the AC system using the plug in power supply PDV AC provided with the PDV The plug in power supply for the laser vibrometer can also be stored in the carrier bag as also shown in figure A 1 A 1 A Optional Accessories A 1 1 Safety Information Power supply Battery charger A 2 To reduce the risk of an electric shock or malfunction only use the plug in power supply PDV AC provided by the manufacturer Do not expose the plug in power supply to rain or moisture It is not necessary to open the housing when using the power supply as intended Always use the accurate plug adapter Lithium ion batteries require a very strict compliance with the charging parameters For this reason only use the battery charger PSV CH provided by Polytec Using any other battery chargers may result in fire or explosion of the battery Note When loading the batteries it is recommended to open the cover of the carrier bag to ensure unimpeded air circulation Safety when Using Lithium lon Batteries Warning Incorrect use of the battery may result in an excessive rise in temper
42. l output 5 6 measuring 4 1 menu INTRO 5 3 main menu 5 3 service mode 5 4 menu structure 5 3 metrological properties laser vibrometer specifications 7 2 motor vehicle cigarette lighter connector laser vibrometer A 10 motor vehicle supply cable specifications A 10 mounting holes inch thread on the laser vibrometer 3 5 M5 on the laser vibrometer 3 5 M6 on the laser vibrometer 3 5 mounting plate dimensions 7 6 N no laser beam fault diagnosis 6 1 no measurement signal fault diagnosis 6 2 O opening up the equipment 3 2 operating modes switch on battery charger A 4 operating requirements battery and battery charger 3 2 PDV 3 2 operating temperature battery charger specifications A 9 laser vibrometer specifications 7 1 optimal 3 2 operating time battery A 10 optics laser vibrometer specifications 7 4 optimal stand off distance selecting 4 4 optional accessories A 1 Over Temp warning on the display 6 1 overcharging battery A 7 overrange indicator on the display 5 6 P parameter setting on the display 5 2 PDV switching on in battery operation 5 1 switching on with power supply 5 1 phase frequency response 4 3 plug in power supply electrical safety 1 3 wide range input 3 2 position of the laser warning labels 1 2 power consumption battery charger specifications A 9 laser vibrometer specifications 7 1 power supply specifications 7 5 power supply cable connection 3 4 cable connection battery charger A 4 el
43. lly lights up You can often still make measurements even if none of the bar graph is displayed The output signal in this case however contains more noise You can now select suitable settings as described in section 4 2 and operate the PDV as described in chapter 5 4 1 4 Making Measurements 4 2 Selecting Suitable Settings The settings necessary for a measurement are limited to selecting the velocity measurement range VELO and the low pass filter LP as well as setting the high pass filter HP Depending on the type of external signal acquisition the measurement signal can be acquired from the analog voltage output ANALOG OUT or the digital output DIGITAL OUT 4 2 1 Measurement Range The PDV offers three velocity measurement ranges whose full scale values are shown in mm s in the Velo display line 20mm s 100mm s and 500 mm s When using the digital output the full scale value is needed as a reference for the numerical value transmitted If you divide the full scale values by four corresponding to the output voltage swing of 4 V you get the respective scaling factors in SYV 5 V 25 V and 125 V To optimize the signal to noise ratio as a general rule the smallest possible measurement range should be used which is not exceeded under the given measurement conditions Coming close to exceeding a measurement range 94 of the full scale is shown by a circular symbol on the right next to the measurement range display
44. lso be connected to the battery charger when being run on batteries and can be kept in the carrier bag Note As soon as the plug in power supply connected to the battery charger is plugged into a mains socket the laser vibrometer connected to it is supplied with power from the mains connection and not from the battery Mains operation A Optional Accessories You can also operate the laser vibrometer using the mains connection with the aid of the plug in power supply even if the battery is connected As soon as you plug the power supply connected to the battery charger into a mains wall socket and press the rocker switch in the direction of the Laser LED the power supply for the laser vibrometer is automatically changed over to mains operation In doing so no power is sourced from the battery but it does not get charged either The display of the laser vibrometer then remains lit up constantly power saving mode is not activated A 1 3 Taking Back the Battery Note Batteries must not be disposed in domestic waste The consumer is legally obliged to pass back batteries after use e g at public collecting points or wherever batteries of this type are being sold A 1 4 Technical Specifications Battery Charger PDV CH Power supply Supply voltage Power consumption Charging current Charging time Ambient conditions Operating temperature Storage temperature Relative humidity Ho
45. lytec de Internet http www polytec de Polytec International Germany D POLYTEC GmbH Polytec Platz 1 7 D 76337 Waldbronn Tel 49 7243 604 0 Fax 49 7243 69944 E mail info vi polytec de Internet http www polytec com France F Polytec PI S A 32 rue D lizy F 93694 Pantin C dex Tel 33 1 48103930 Fax 33 1 48100803 E mail info polytec pi fr Internet http www polytec pi fr Great Britain GB Lambda Photometrics Ltd Lambda House Batford Mill GB Harpenden Hertfordshire AL5 5BZ Tel 44 1582 764334 Fax 44 1582 712084 E mail info lambdaphoto co uk Internet http www lambdaphoto co uk Japan J Polytec KK Hakusan High Tech Park 1 18 2 Hakusan Midori ku J Yokohama shi 226 0006 Kanagawa ken Tel 81 45 9384960 Fax 81 45 9384961 E mail info polytec co jp USA West Polytec Inc North American Headquarters 1342 Bell Avenue Suite 3A Tustin CA 92780 Tel 1 714 850 1835 Fax 1 714 850 1831 E mail info polytec com Internet http www polytec com USA East Polytec Inc East Coast Office 16 Albert Street Auburn MA 01501 Tel 1 508 8320501 Fax 1 508 8324667 E mail info polytec com Internet http www polytec com Man Vib PDV100 1104 03e
46. ng up Front optics Cleaning Opening up the equipment Battery and battery charger optional 3 2 The PDV can be used in normal climatic conditions refer to chapter 7 Avoid condensation on the optical components caused by a rapid change in temperature Avoid exposure to direct sunlight to prevent the instrument from overheating The plug in power supply provided for the PDV has a wide range input and can be connected to all mains voltages with nominal values between 100V and 240V It is essential to ensure unimpeded air circulation around the PDV and protect it from radiant heat With high ambient temperatures mount it on cooling metal surfaces if possible to minimize heat build up Make sure that all jacks are connected properly and firmly Protect all connecting cables from mechanical damage and from high temperatures The optical components in the PDV require a warm up period of approximately 20 minutes until the optimal operating temperature has been reached Handle the front optics with care Dirt may only be removed using a soft dry cloth an optics brush and bellows The housing surfaces of the instrument can be cleaned with mild detergent solutions or ethanol It is not necessary to open the housing when using the equipment as intended and will invalidate the warranty The lithium ion battery for the PDV can be used at temperatures of between 0 C and 40 C 32 F and 104 F Ensure a temperature of betw
47. nt 3 5 3 First Steps 3 4 Functional Test Preparing Cabling Switching on Test 3 6 For the first functional test of the PDV proceed as follows 1 2 Make sure that the beam shutter on the laser vibrometer is closed Plug the connecting cable of the power supply into the socket 12V on the back of the laser vibrometer The connection must be easy to plug in If not check the plug for bent contact pins to avoid serious damage being incurred Plug the power supply to a wall socket On the top ofthe laser vibrometer the display lights up Laser light is not yet emitted as the beam shutter is still closed Before now opening the beam shutter remember the information on laser safety in section 1 1 Open the beam shutter To do so turn the corrugated ring on the front lens to the left when looking in the direction of the emitted laser beam The laser beam is now emitted from the laser vibrometer Point the aperture of the PDV onto a matt white test surface e g a piece of paper Position the PDV approximately 23cm away from the test surface measured from the retaining ring for the front lens refer to section 7 2 4 and focus the laser beam on the test surface using the focusing ring If the signal level display on the display lights up the optics and the input section of the electronics are working correctly Set the measurement range Velo 20mm s on the PDV Connect an oscilloscope to the BNC jack AN
48. r on the right next to the overrange indicator refer to figure 5 5 Velo on LP 22 HP N BERR RRR Figure 5 5 Display with battery level indicator If the battery level indicator is lit up continuously it means that the battery is very low From now you have got approximately another 15 minutes operating time available You will find further information on the battery and on charging the battery in section A 2 For information on safe handling of lithium ion batteries refer to section 1 4 and section 1 5 5 9 Measurement Signal Output Analog The measurement signal is available at the BNC jack ANALOG OUT on the back of the laser vibrometer as an analog voltage signal Digital The measurement signal is available at the Triax jack DIGITAL OUT on the back of the laser vibrometer as a digital signal in S P DIF format 5 6 6 Fault Diagnosis 6 Fault Diagnosis Some simple tests are described in the following for you to carry out yourself in the case of malfunction In the case of more difficult problems with the individual functions please contact our service personnel The tests described here are not meant to lead you to carry out maintenance work yourself but to provide our service personnel with information which is as accurate as possible Testing the PDV is limited to such tests in which the housing does not have to be opened Opening the housing can cause a malfunction and will invalidate the warranty If req
49. r vibrometer general data 7 1 laser vibrometer metrological properties 7 2 motor vehicle supply cable A 10 optics 7 4 power supply 7 5 temperature change in 3 2 displaying in service mode 5 4 Test LED on the battery charger A 5 test signal OV generating in the service mode 5 5 test signal 2 80V generating in service mode 5 5 testing on functional test 3 6 tripod assembly onto 3 7 U unpacking the components 3 1 unsuitable handling 3 1 Index V Velo setting in the main menu 5 3 velocity measurement range 4 2 vibrometer cable battery charger A 4 view from above control elements 3 3 from the bottom control elements 3 5 from the rear control elements 3 4 visibility maxima laser vibrometer specifications 7 4 optimal stand off distances 4 4 table 7 7 W warming up 3 2 warning label position 1 2 warning on the display Batt empty 6 2 Over Temp 6 1 wavelength laser vibrometer specifications 7 4 weight battery charger specifications A 9 battery specifications A 10 carrier bag specifications A 10 laser vibrometer specifications 7 2 wide range input plug in power supply 3 2 wrong delivery 3 1 vi Polytec Deutschland POLYTEC GmbH Polytec Platz 1 7 D 76337 Waldbronn Tel 07243 604 0 Fax 07243 69944 E mail info polytec de Internet http www polytec de POLYTEC GmbH B ro Berlin Schwarzschildstra e 1 D 12489 Berlin Tel 030 6392 5140 Fax 030 6392 5141 E mail polytecberlin po
50. s perfect the actual charging process will begin The yellow Charge LED lights up during the entire charging process It will take approximately 5 hours to charge a battery which has been completely discharged A buzzing sound coming from the battery charger and the plug in power supply during the charging process is normal A 6 A Optional Accessories Loading the battery is done in several stages The charge level of the battery thereby is shown by the 50 and the 100 LED As soon as the 50 LED lights up the battery has attained half its capacity This state is attained after approx 4 hours on a completely discharged battery As soon as the 100 LED lights up the battery has attained its specified capacity While the 100 LED is lit charging is continued for approx 15 30 minutes until the maximum available capacity has been attained As soon as the 100 LED flashes the charging process has completely finished and the battery is switched off Once the battery has been completely charged press the rocker switch back into the middle position Pay attention to this additional information on charging the battery The charging process can be interrupted during any phase and can be continued later A partially charged battery can be used to operate the laser vibrometer but will not attain the maximum operating time Overcharging the battery is safely prevented through the charge electronics It is a good idea to end the ch
51. splay at HP For technical reasons this filter has been realized in conventional analog technology and therefore only has an effect on the analog voltage output The high pass filter can always be used beneficially for analog signal acquisition if you are working with high level background interference e g caused by machine vibrations when a relatively small signal is to be measured at high frequencies Under these conditions please take care of the internal saturation of the selected measurement range refer also to section 4 2 1 Attention has to be paid to the following properties for the high pass filter e The changeover from the pass band to the stop band occurs with a more gradual frequency roll off 60dB dec than with the low pass filter Near the cutoff frequency a significant amplitude error occurs refer to figure 4 1 For frequencies gt 140Hz the amplitude error is lt 0 5dB 5 Frequency 100 000Hz 141 930Hz 41 930Hz Gain 3 010dB 500 338mdB 2 509dB 135 001deg 89 616deg 45 388deg deg a Y dB Phase 10 100 ic Log C Linear Hz Phase C Group Delay None Figure 4 1 Amplitude and phase frequency response of a 3rd order Butterworth high pass filter The lower graph in figure 4 1 represents the phase frequency response The 360 phase jump can only be seen on the diagram for presentation reasons 4 3 4 Making Measurements 4 2 4 Optimal Stand off Distances Visib
52. the tripod as described in the assembly instructions provided by the manufacturer MANFROTTO Then mount the 3 axes head onto the tripod as described in the assembly instructions provided by the manufacturer MANFROTTO Set the laser vibrometer onto the 3 axes head and fix it using the central 1 4 screw Whenever you want to remove the laser vibrometer from the 3 axes head you should hold the PDV while undoing the 1 4 screw Keep the assembly instructions for the tripod and the 3 axes head ina safe place Before attempting to mount the laser vibrometer all locking mechanisms of the tripod particularly screws should be checked to make sure they are tight Loose screws may cause the tripod to be unstable and possibly collapse Proceed with the assembly as follows 1 Assemble the tripod as described in the assembly instructions provided by the manufacturer MANFROTTO Then mount the fluid stage onto the tripod as described in the assembly instructions provided by the manufacturer MANFROTTO Open the locking mechanism on the fluid stage by simultaneously pressing the safety latch and opening the safety lever Mount the quick release hexagonal plate provided on the underside of the laser vibrometer using the three screws M5 3 7 3 First Steps 5 Use this plate to position the laser vibrometer on the fluid stage The safety lever clicks automatically into place 6 Ensure that the quick release plate is attached all the way
53. tting Parameters via the Display ss 5 2 5 6 1 Philosophy ec eot e a a ae 5 2 5 6 2 Organization of the Menus si 5 3 5 6 3 The Individual Menus eene tte then ne inte O in ned ens 5 3 Dif Overrarige Indicator eee eee iaa 5 6 5 8 Battery Level Indicator oii eier Eee infos 5 6 5 9 Measurement Signal Output eee emen nhe enne nnne nnn nnns 5 6 Contents 6 Fault Diagnosis 6 1 06 1 No Easer Beam dani ere eg annees en drone kg due een deca a 6 1 6 2 No Measurement Signal sirs arnai arata era AAAA tentent net AA AENEA O ARRENA AAA 6 2 6 3 Focusing Ring can not be Moved issu 6 2 7 Technical Specifications 7 1 TA Standards Applied io iesen teu cbe ea a a he ae dete eae bt i 7 1 7 2 Laser Vibrometer PDV 100 ah irei a aa eere A a Lena Fe po Ina A a aE 7 1 7 2 1 G n ral Data fode ei uaea e aae else ih 7 1 7 2 2 Metrological Properties namen ne a ed 7 2 12 39 O Rd E 7 4 12 4 Dimensions la ee Itam IU 7 5 1 3 Poweroupply PDVAG 2 ee aa ee ann t SCR A Daher 7 5 7 4 Mounting Plate OFV P7 cisco ii cae ee ae calle ee ine cine nn ete nec De d mere nn a ed eee 7 6 7 5 Table of the Visibility Maxima sis 7 7 Appendix A Optional Accessories Appendix B Declaration of Conformity Index 1 Safety Information 1 Safety Information 1 1 Laser Safety The light source of the PDV is a helium neon laser It is important to understand that laser light has propert
54. ty device is activated preventing the battery from charging further Heating the battery can destroy this safety device and can cause an explosion or ignition of the battery e If the given charge time for the battery is significantly exceeded without the battery reaching full capacity please abort the charging process Doing so may cause the battery to overheat explode or ignite A 3 A Optional Accessories A 1 2 Functional Description of the Battery Charger PDV CH Control The view from above of the battery charger is shown with the control elements elements in figure A 2 12V Laser i Fail Test LO Charge O 50 O 100 O Figure A 2 The view from above of the battery charger AUT Si 1 Connector for 12V DC voltage 4 pin circular connector Socket for the cable of the plug in power supply PDV AC to operate the battery charger or the laser vibrometer respectively 2 Rocker switch for the operating modes of the battery charger e Switch in direction Laser LED The laser vibrometer is switched on and ready to use the green Laser LED is lit The battery charger is switched off e Switch in the middle All functions are switched off position e Switch in direction charge level indicators The battery charger is switched on and a lamp test is carried out refer also to Charging battery The laser vibrometer is switched off 3 Vibrometer cable with 4 pin cir
55. uired please contact our service department Based on your fault description further procedure will be determined If the PDV has to be sent back for repair always use the original packaging and enclose an exact description of the fault 6 1 No Laser Beam If no laser beam is emitted check the following 1 Is the beam shutter opened 2 Is the PDV connected to the mains as described in section 3 5 2 3 Is the display on the top of the laser vibrometer lit up or does it show a menu If the display is not lit up or is not showing anything it can be assumed that there is a fault with the mains supply 4 Does the housing feel warm to the touch as normal after about 15 minutes in operation indicating that the laser is active 5 Is the display showing the following warning WARNING Over Temp Laser Off The laser has been switched off because the temperature limit inside the laser vibrometer has been exceeded Switch off the instrument and let it cool down 6 1 6 Fault Diagnosis Battery 6 operation only Is the display showing the following warning WARNING Batt empty Laser Off The laser has been switched off because the battery is empty To avoid completely draining the battery and thus shortening its useful life set the rocker switch of the battery charger in the direction of the charge level indicator Then reload the battery as described in section A 1 2 under Charging battery
56. up and indicate that the PDV is ready to operate Note The background lighting of the display is equipped with a power saving mode If no key is pressed for approximately 5 seconds the lighting is switched off but the readout on the display is still active With a completely charged battery the laser vibrometer can be operated for 4 5 hours As the battery gets older and in low ambient temperatures the operating time gets shorter About 30 60 minutes before the battery is exhausted you will be given a warning The battery level indicator in the display on the laser vibrometer lights up If you continue to operate the laser it will switch itself off for safety reasons after several minutes to prevent the battery from discharging exhaustively The remaining charge in the battery is used to display the following warning message for 15 30 minutes on the laser vibrometer display WARNING Batt empty Laser Off At the latest at this stage you should switch off the laser vibrometer and recharge the battery Otherwise the internal battery protection will completely disconnect the battery from the charge once it has reached the exhaustive discharge threshold and both the display on the laser vibrometer and the Laser LED on the battery charger go out To protect the battery the laser vibrometer can be operated with the plug in power supply if there is a mains connection available The plug in power supply can therefore a
57. using Dimensions Weight Protection rating 12VDC 2V Mains 100 240 VAC 50 60Hz with plug in power supply PDV AC max 30 W 1 1A ca 5h 5 C 40 C 41 F 104 F 10 C 65 C 14 F 149 F max 80 non condensing 110mm x 45mm x 120mm 0 5 kg IP 65 Length of the vibrometer cable 2m Length of the battery cable 0 3 m A 9 A Optional Accessories Battery PDV LI Carrier bag PDV BS Electrical data Type Identification number Voltage Capacity Operating time with PDV 100 Charge discharge cycles Housing Dimensions Weight Dimensions Weight lithium ion battery rechargeable 8932 nom 14 4V nom 4 6 Ah min 4h min 500 with capacity decline to 60 80mm x 70mm x 115mm 0 8 kg 370mm x 160mm x 150mm 5 5 kg incl PDV plug in power supply 1 battery and battery charger A 2 Motor Vehicle Supply Cable PDV DC A 10 You use the motor vehicle supply cable PDV DC to operate the laser vibrometer or the battery charger PDV CH from a 12V on board plug socket or a motor vehicle cigarette lighter To do so connect the 4 pin circular jack of the motor vehicle supply cable with the 4 pin circular connector 12V on the back of the laser vibrometer or on the top of the battery charger Then plug the connecting plug into the 12V on board plug socket or using the red adapter into the motor vehicle cigarette lighter We do not recommend operating the PDV while
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