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User Manual - CEO Knowledge Center

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1. CHAPTER 4 Installation amp Operations To ensure safe operation of the Patara laser system please read the chapters about safety in the laser user manual eDrive manual TEC driver manual and chiller manual It is the purchaser s responsibility for any loss and injury during installation and using of the laser system Northrop Grumman Aerospace Systems Cutting Edge Optronics CEO recommends that the technician from CEO should perform the installation of the laser for the first time or only qualified technicians should be allowed for the installation and maintenance of the laser If you do plan to service your laser please follow the following procedures 1 Laser System Components PolyScience 2 Chiller 1 Laser head 3 eDrive 5 Laser Signal Cable 6 Diodes Power Cable 7 QSRF Cable 8 AC Power Cables Figure 9 Components for the Patara laser except the water hoses and filter CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 28 Before installation of the laser familiarize oneself with the components of the laser system The components for the Patara laser are listed in Figure 9 The water hose and filter will be shown below 2 Unpacking Your CEO Patara laser was carefully packed for shipment If its carton appears to have been damaged in transit have the shipper s agent present when you unpack Inspect the unit as you unpack it looking for dents scratches or other evidence of damage If you
2. 16 Select set frequency B gt CW Q Switch Setup Menu Set Q Switch Set Pulse Enabled Frequency Width EE p E 17 Dial in the desired repetition frequency Press done when finished Set Q Switch Frequency Present Value 7 00 kHz Rotate Dial to Change Value 1x Done A A A Em m 18 Select set pulse width to set the duration of the trigger pulse to the Q switch CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 50 CW Q Switch Setup Menu Set Q Switch Set Pulse Enabled Frequency Width A A A E E 19 Rotate dial to adjust trigger pulse width to 5 microseconds Press done to enter value Set Q Switch Pulse Width Present Value 5 00 us Rotate Dial to Change Value 1x Done A A E ua 20 Select more for the other Q switch options CW Q Switch Setup Menu Set Q Switch Set Pulse Enabled Frequency Width A A A A E E E CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 51 2 Select set Q switch power to reduce laser power from maximum CW Q Switch Setup Menu Set Set Q Switch FPS Power Settings A A A A xX HH 22 Set the laser power level control according to the table provided with the laser Press done to enter value Set Q Switch Output Power Present Value 83 Rotate Dial to Change Value 1x Done A A A A E E HB 23 The display will revert to the CW Q Switch Setup Menu Press
3. Coolant in connector on the housing 5 Purge the lines with for at least Y2 hour at 5 psi 6 Remove purge lines After the laser is dry it should be placed in a sealed ESD bag with some form of desiccant Then package the laser securely in a shipping container The chiller may require similar treatment to remove water or protect it with antifreeze Refer to the chiller manufacturer s instructions Do not reconnect chiller lines to laser prior to shipment After shipment if antifreeze was used the chiller will need to be drained and cleaned A new filter and clean Purelase 180 coolant should be added before the chiller is reconnected to the laser 2 Housing Purge The Patara optics assembly needs to be kept at low humidity in order to protect the SHG crystal which is slightly hygroscopic and to prevent the possibility of condensation on the laser diode arrays The Patara housing provides a level of protection from entry of ambient humidity but it is not hermetically sealed When operating in a high ambient humidity precautions need to be taken to keep the interior of the housing dry The lid of the housing has a port for a desiccant cartridge which should be changed when the indicator on the cartridge is no longer blue Also the housing interior can be purged with dry using valves on the rear CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 56 of the housing The valve with the stem is for the inlet line of the purge an
4. Once this temperature is found and fixed the temperature of the crystal can be kept stable to 0 1 C with the TEC controller The Nd YAG laser amplifier is also capable of storing a considerable amount of energy due to the long upper state lifetime of the Nd ion If some kind of device is used to prevent the buildup of optical power in the oscillator cavity by introduction of loss greater than the available gain energy will accumulate in the gain medium If this same device suddenly removes this loss the laser power will increase exponentially with each round trip of the oscillator cavity until much of the stored energy is exhausted and the gain once again falls below the loss The fact that the time for light to transit the laser cavity is only a few nanoseconds results in this stored energy being released in a very short duration pulse Such a device is called a Q switch and they are available in two major types acousto optic and electro optic The Patara laser uses an acousto optic Q switch to form its pulses The high peak power achieved in this manner is also essential to achieving an adequate fraction of conversion to 532 nm The conversion process is dependent on the intensity of the circulating 1064 nm power The laser beam which can circulate inside the oscillator cavity is determined by a process of self consistency where the beam characteristics at any given location in the cavity are repeated after the beam completes a round trip ba
5. The temperature of SHG crystal for the phase matching is crucial for Patara laser It determines the performance of the laser It is set and controlled by a TEC driver Please read the TEC manual to set and monitor the temperature CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 14 Thermal Control Subsystem Thermal control and heat removal from the Laser Transmitter is accomplished by a chiller provided by CEO or the user The laser has an integral flow switch which will interrupt drive current to the amplifier module and power to the Q switch should the flow rate fall below 1 gpm 3 8 Ipm Flow direction is labeled on the laser optics housing below the coupler ports Please observe the flow direction at all times The thermal control system must be capable of maintaining the temperature set point to 0 1 C with a flow rate of 1 5 gpm 5 7 Ipm This will require a pressure of approximately 49 psi at the input to the laser housing in order to achieve this Pressures at the chiller may be several psi higher if additional filtering flow metering fittings and long runs of coolant tubing are used Coolant used in the system must be compatible with the materials used in the internal coolant lines of the laser Tap water or de ionized water must be avoided because of corrosion and mineral deposits CEO supplies an approved coolant for this application CEO UMAN 0031 Rev B Cutting Edge Optronics NGC I5 CHAPTER 2 Laser Safety Please
6. PSN ROO OOS replaceable filter 2 0 U S gallons piss Figure 11 Diagram of water hoses and filter connections Water Hoses and Filter Connections The water hoses and filters are provided by CEO They should be connected as illustrated in Figure 11 The correct water flow path starts with the supply port of the chiller gt filter gt coolant in port of laser head gt laser head gt coolant out port of laser head gt return port of the chiller Please be aware of the flow direction of the filter NOTE Hose barbs should have threads wrapped with Teflon tape CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 32 The filter may be attached to the back of the chiller or to the wall The chiller cover may be required to mount the L Bracket to the rear of the chiller and holes may have to be drilled The 1 caps screws protrude through the rear grill from the inside Water flow direction is labeled on the laser quick disconnects Figure 12 is the picture of the chiller with water hoses Please notice that the positions of supply and return ports of the chiller are different from the diagram of Figure 11 Figure 12 Picture of assembled water hoses filter with the chiller Connections on Laser Head Figure 13 Connectors on the back panel of the Patara laser CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 33 Figure 13 shows all of the connectors on the back panel of the
7. Parameter Performance Electrical Inputs Auto ranging 100 250 VAC 47 63 Hz Drawing 7A Cooling Closed Loop Recirculating Chiller Coolant 460 Purelase 180 Operating Temperature 18 30 C Laser head size 24 Lx 6 Hx 8 W eDrive Nitro Size 7T Hx 19 Wx17 D 1 Chiller must be able to circulate water at the approximately 60 psi required in CEO lasers see final test report for each laser specific required pressure 2 Drain the chiller and flush with cleaning solution 460 CCL2567 every six months Then put fresh coolant and filter on chiller 3 Alternately the laser can be cooled with distilled water as long as a corrosion inhibitor and algaecide are added CEO recommends Optishield Plus if this option is chosen Optics Subsystem The optical subsystem consists of an Optical Assembly on a CEO industrial laser optics bench The Optical Assembly is kinematically mounted to the housing Electronic Subsystem The electronic subsystem consists of a 4 U sized eDrive and TEC driver See the eDrive Manual for details For setup and operation of the eDrive for Patara see chapter 3 Please contact your NGAS CEO service engineer if you need assistance Operation at reduced power requires that two settings be adjusted in the eDrive the Q switch Power and the drive current level Iset A table on the Final Test Report shipped with each laser gives the values which are necessary to achieve the full 9 5 and 2 W power conditions
8. off Check the hold off of the laser and make sure the Q switch is enabled and RF driver in eDrive function properly Possible cause the pulse repetition rate was not correct Check with the PRF in eDrive or the frequency of trigger pulses Possible cause the laser was misaligned Perform the laser power optimization procedures as described in the manual to bring the power back Possible cause the laser had internal optical damage or the rod was contaminated by water or the diode reached the end of lifetime if the laser power can t be restored after optimization Contact CEO or other qualified technician for service No Output Power Make sure that the pumping current is set at operation point Make sure that the Q switch is not held off The laser is triggered at preset PRF with internally or externally triggering source CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 70 Verify the shutter light is lit on the front of the eDrive indicating that shutter is open on the laser Verify there are no interlock warning messages on the eDrive and that the eDrive is supplying the correct current Verify the eDrive is not gated off externally and not commanded to low or 0 QSW power Laser Flicker When the external perturbations are applied to the laser system the laser exhibits the flickering Make sure the laser performance is optimized Make sure there is no strong vibration f
9. 21 of the United States Code of Federal Regulations Chapter 1 Subchapter J Part 1040 10 and 1040 11 as applicable To maintain compliance with these regulations once a year or whenever the product has been subject to adverse environmental conditions e g fire flood mechanical CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 17 shock spilled solvent check to see that all features of the product identified on the radiation control drawing Figure 2 function properly Also make sure that all warning labels remain fully attached Serial Number Emission Radiation Non Interlocked Defeatably Interlocked Indicator Emission Protective Protective Housing Housing Figure 2 Radiation Control Drawing pr a nado Non Interlocked Protective Housing tn Ops roi qut DANGER Laser radiation when open and interlock defeted AVOID EYE OR SKIN EXPOSURE TO DIRECT OR SCATTERED RADIATION VISIBLE ENT LASER RADIATION MODEL NUMBER AVOID EYE OR SKIN EXPOSURE TO DIRECT This laser product complies with 21 CFR 1040 as applicable MADE IN U S A OR SCATTERED RADIATION Wavelength Power Pulsewidth PRF 808 nm lt 0 1W cw 532 nm 15 W 60 80 nsec 4 10 kHz Defeatably Interlocked Protective Housing DANGER Laser radiation when open and interlock defeated AVOID EYE OR SKIN EXPOSURE TO DIRECT OR CLASS IV LASER PRODUCT SCATTERED RADIATION Figure 3 Warning Labels CEO U
10. Fault Detected Check that the Emergency Stop Button is not depressed Check INTERLOCK input on back panel for open condition Cover Interlock Fault Detected Make sure the cover is secure on the laser Check cable connections to laser Q Switch Driver Over Temp Fault Verify the cooling fan for the RF driver is operational Verify that the airflow through the driver is not obstructed This fault won t clear until the RF driver has had time to cool down Q Switch HVSWR Fault Check RF cable connection to laser Perform RF output power check The Q switch has failed if the measured RF power is around 20W with 500 RF dummy load Need repair service Q Switch Low Power Fault Perform RF output power check Verify voltage to RF driver Adjust RF power if needed Channel Over Temperature Fault Check eDrive fan for operation Verify that the airflow through the driver is not obstructed CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 72 Appendix Customer Service Questionnaire Form We have provided this form to encourage you to tell us about any difficulties you may have experienced in using your Northrop Grumman Cutting Edge Optronics instruments or its instruction manual Problems that did not require a formal call or letter to our service department but that you feel should be remedied We are always interested in improving our products and manuals and we appreciate all suggestions Thank
11. HH M 3 Select Channel 1 Channel Setup Menu Internal Channel 1 Q Switch Trigger Enabled A E HH CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 45 4 The Channel 1 CW Setup menu will appear Ensure the leftmost button reads channel enabled Channel 1 CW Setup Menu Channel Set More Enabled Current A A E E Next select set current menu Channel 1 CW Setup Menu Channel Set Enabled Current A A A A E m D M 5 The dial to the right of the screen is used to change the setting Using this dial set the current Depress the dial to change to coarse adjustment if desired Coarse setting is indicated by 10X on screen Press done to enter the value Set Channel 1 Current Present Value 202A Rotate Dial to Change Value 1x Done A A Em m a CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 46 6 The screen will go back to the Channel 1 CW Setup Menu Select more options Channel 1 CW Setup Menu Channel Enabled Current A A A E HN NM 7 Select set slew rate which affects the rate at which current increases at initial turn on of the laser Channel 1 CW Setup Menu Slew Set Control Standby Enabled Current A A A A KX m 8 Again use the selection knob dial to the right of the screen to adjust value CEO recommends a rate of 5 Amps per second Press done when finished Set Channel 1 Slew Rate Present Value 5 a
12. The temperature setting of the chiller should be the same as in the report If it is set to a different temperature change it to match the setting on the report 3 The minimum flow rate for Patara laser is 1 5GPM Check the flow rate to make sure it meets the requirement If it does not open the valve inside the chiller until it matches the flow rate recorded in the test report 4 Run the chiller for a period of time and wait for the chiller to stabilize at the set temperature WARNING Do not operate coolant system below air condensation temperature dew point at laser head Condensation on the diode arrays can seriously damage the laser head CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 30 Turn on and verify the settings of the TEC controller Turn on the power with the switch on the back panel of the TEC controller 2 By pressing the DISPLAY SELECT button check if the temperature is set correctly according to the test report The power pulse width and stability of the laser are strongly dependent on the actual temperature of the TEC controller If the TEC temperature does not match the test report change the temperature setting though increase decrease button 3 Wait for several minutes to see if the actual temperature is stabilized at the set temperature If so then go to the next step WARNING Do not set the temperature of SHG below air condensation temperature dew point at laser head Conde
13. discover any damage immediately file a claim against the carrier and notify your CEO representative CEO will arrange for repair without waiting for settlement of your claim Keep the shipping container If you file a damage claim you may need it to demonstrate that the damage occurred as a result of shipping If you need to return the unit for service the specially designed carton assures adequate protection A Patara laser system consists of 1 Laser head P N PA 016 QTGP 2 eDrive P N EDAC AXA 2440N 3 TEC Controller 4 Laser signal cable 5 Diode power cable 6 Hoses and filter for chiller 7 US power Cord for Chiller 8 US power Cords for eDrive and TEC controller 9 Chiller Please check the contents against the packing list and the sales order 3 Laser Head Setup The laser head should be mounted on an optical table or equivalent strong flat surface There are three mounting holes provided to secure the laser The laser should be installed in a clean environment In the direction of the laser output beam a power meter with the power scale up to 30W should be installed approximately 1 5 feet away from the laser In order to protect the power meter a negative lens f 100mm with AR coating at 532nm should be installed in front of the power meter as shown in Figure 10 If a negative CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 29 lens is not available the power meter should be at least 2m away from the laser so
14. h ee ase Pepe ba sete basa lea ee 56 2 HOUSING PURGE asin ibas 56 3 DESICCANT CARTRIDGE REPLACEMENT is 57 4 CHILLERMAINTENANGE 58 5 CHECKING HOLD OFF nott t FR E PR ER Brann Nn 58 6 EXTEND LIFETIME OF LASER DIODES Ng ld 58 7 59 CHAPTER G CUSTOMER SERVICE ssccvcconvessecensecsvensyscnevesvecsuvestecneesevenssvensosssSesbessevensedevonsysdacbes edsueestecsesstensevensess 64 1 BEFORE CONTACT CUSTOMER SERVICE 2 MODULE REPLACEMENT CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 4 3 RETURN OF THE INSTRUMENT FOR REPAIR 2 5 andsta an dono a dais 64 4 CONTACTING CUTTING EDGE OPTRONICS cccssesescecececeessseececeseceensseecececeeuensscecececeaueseececeseceeueneececessaeeganeeeeeeeeagenes 66 5 WARRANTY ooi no e as aia 67 6 DISPOSAL a Po s Eas erae FRE Pod pat Gs aa 67 7 ROCROHS DEGEARATION kids ka it 67 CHAPTER 7 TROUBLESHOOTING 5 25 eio at e eo ea son o ls eoa ee cds s eoo ld Sore i a 69 1 LASER TROUBLESHOOTING INTRODUCTION ss s 7 51 23 repa ssi dra sese Pea Pea ea D qb cagcbeccedeeseadcaceteaveacasdase 2 PROBLEMS WITH LASER OUTPUT sess esses se eese nnn 3 PROBLEMS R
15. the fundamental which could have been optimally coupled out of the cavity by a semi transparent mirror is now converted to another wavelength provided of course that the semi transparent mirror is replaced by one that is fully reflective at the fundamental wavelength Patara uses this intra cavity technique to double the laser frequency to a wavelength of 532 nm The frequency doubling device is a crystal of lithium triborate LBO cut at a special angle which provides phase matching between the fundamental waves in the beam and the waves generated at 532 nm at around room temperature Phase matching and hence efficient conversion is very sensitive to the angle to the intra cavity beam in one direction and also to the temperature of the LBO crystal It is therefore necessary to provide a very stable mechanical and thermal environment for the doubling crystal The condition of phase matching can be met either by the angular adjustment of the doubling crystal mechanically or by the temperature of the crystal electrically Considerations of stability and reliability lead to the doubling crystal being mechanically fixed The phase matching condition in the Patara laser is realized by the controlling of the temperature of the doubling crystal The doubling crystal is mounted in a cell on the top of the Thermal Electric Cooler TEC The performance parameters are optimized by finding an optimum temperature of the crystal typically between 20 and 50
16. the laser head Air is trapped in the lines if the water level drops when chiller is turned on and then rises when turned off Failure to heed this warning may result in the destruction or serious damage to the device and will void the product warranty Check for Leaks Once the pump is turned on check all of the connectors to see if there is any leakage Of leakage is observed turn off the pump immediately and fix the leak CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 38 The reservoir s fluid level will drop as the process and or process cooling lines fill with fluid Add fluid as follows Closed Systems Slowly add fluid to the reservoir until the liquid level remains stable Open Bath Systems Adjust the restriction pinch valve until the liquid level in both the bath and the reservoir remain stable Add fluid as needed to bring liquid levels in the bath and reservoir up to the desired level Make sure the fluid level in the bath is above the opening on the Chiller s inlet hose Replace Reservoir Cap 8 First time laser turn on procedures Remove the cap that protects laser output window and make sure the window is clean If not clean it with a lens tissue and Methanol gently Turn on and verify the settings of the chiller 1 Turn on the chiller 2 Check the temperature setting of the chiller There is a test report attached for each Patara laser The operational temperature of coolant is written on the report
17. 00 Replacement cartridges may be purchased from Humidial Corporation 909 825 0923 Or Delta Adsorbents 630 595 3286 CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 57 WARNING Do not operate the laser without a functional desiccant cartridge Condensation on the diode arrays can seriously damage the laser and may void warranty 4 Chiller Maintenance The 5 micron filter on the water chiller should be replaced every six months at minimum If the water chiller manual suggests more frequent changes comply with that recommendation Drain and re fill the chiller per the chiller and coolant manufacturer s instructions 5 Checking Hold Off Checking hold off is a technique needed to verify proper operation of the laser To check hold off perform the following 1 Turn on the laser and run for at least 20 minutes 2 Lower the pump current to 10A 3 Set the QSW internal trigger or external gate mode to external trigger mode in the channel menu on the eDrive Ensure there is no input to the external gate BNC on the back panel of the eDrive See page 102 in the eDrive manual for details 4 Gradually increase the pumping current to the operation current 5 Observe the beam output on the power meter Hold off condition is met when no green light is visible 6 If green is observed the laser does not hold off and may need internal repair 7 Reduce the current to 10A 8 Return the eDrive to internal trigger or e
18. DO THIS STEP ONLY WHEN ALL ABOVE STEPS ARE FINISHED AND LASER DOESN T MEET THE SPECIFICATIONS WITH THE CORRECT SETTINGS a Identify the locations of access holes for HR and HM mirrors Please pay attention to the positions of HR and HM mirrors with respect to the direction of the laser output b Remove screws from access holes only in a dust free environment c Use a 1 8 ball driver to make adjustments A final adjustment is 1 or less rotation A small adjustment is about 2 of rotation A coarse adjustment is 15 or 20 of rotation If coarse adjustments are needed to obtain performance reduce operating current by 2A Return to normal operating current when making small and final adjustments CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 61 ACCESS HOLES FOR HR ADJUSTMENT LOCKWISE MOVES TO RIGHT DS o COUNTER CLOCKWISE MOVES BEAM TO LEFT LOCKWISE MOVES BEAM DOWN COUNTERCLOCKWISE MOVES BEAM UP CLOCKWISE MOVES BEAM DOWN COUNTERCLOCKWISE MOVES BEAM UP CLOCKWISE MOVES BEAM TO RIGHT COUNTER CLOCKWISE MOVES BEAM TO LEFT ACCESS HOLES FOR HM ADJUSTMENT Figure 20 Illustration of accessible holes for HR and HM cavity mirror adjustment d The screws for the adjustments of the vertical tilt angle and the horizontal tilt angle are illustrated in Figure 20 above e Adjustment procedures for the power optimization Make small adjustments to the horizontal angle of HM m
19. ELATED WITH 4 EDRIVE OPERATION AND TROUBLESHOOTING APPENDIX CUSTOMER SERVICE QUESTIONNAIRE 73 CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 5 List of Figures Figure 1 System Block Diaria tl 13 Figure 2 Radiation Control Drawing tuoi on eta eso teo psc ies 18 Figure 3 Warning Labels ado A pu cad aaa edd satel Snags 18 Figure 4 Patara Front View uiui rede pea d Lo Set vade UL oed etait da 19 Pipure 5 Patara Rear View aaa aa 20 F pure 6 Patara VIewes un aeu eeu A a A 21 Figure 7 Constant Dew Point Lines for Ambient Temperature and Relative Humidity 25 Figure 8 eDrive Nitro Control Panel ETUR D Eau ui bo eap aad de uds 27 Figure 9 Components for the Patara laser except the water hoses and filter 28 Figure 10 Basic setup for laser power n e eine cs 30 Figure 11 Diagram of water hoses and filter connections 32 Figure 12 Picture of assembled water hoses filter with the chiller 33 Figure 13 Connectors on the back panel of the Patara 33 Figure 14 Picture of the back panel of eDrive ii k Ga 35 Figure 15 Picture of the back panel of TEC Controller eee 36 Figure 16 First Giant Pulse with the Setting of FPS disabled sees 44 Figure 17 Desicca
20. MAN 0031 Rev B Cutting Edge Optronics NGC 18 CHAPTER 3 System Details 1 Introduction Operation of the Patara laser head is explained below Please contact your Cutting Edge Optronics service engineer if you need assistance 2 Patara Laser The Patara laser head measures 24 in L by 8 in W by 6 in H not including the connectors at the rear of the laser The side of the Patara laser has a laser emission indicator The output window is positioned 76 2 mm 3 0 inches from the bottom of the Patara laser and 99 7 mm 3 93 inches from the side with the emission indicator Emission Indicator Alignment Opening Output Window Figure 4 Patara Front View The rear panel of the Patara laser has connectors for cables These cables connect to the eDrive Nitro The back panel also has ports for the coolant in and coolant out CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 19 Nitrogen Alignment Purge Opening Valve Figure 5 Patara Rear View Also located on the front and back panels are alignment openings The openings are sealed by screws which prevent emission during normal operation However the service technician can remove the screws and shine a HeNe laser through the opening to aid alignment WARNING The screws filling the alignment hole are considered non interlocked covers If the screws are not replaced and the Patara laser is run the opening will function as an aperture It can allow an output beam o
21. Patara laser of the connectors are clearly labeled The steps for the installation follow Plumbing Connection Push the barb fittings of water hoses connectors gently into the COOLANT IN and COOLANT OUT ports by following the flow path direction Wetting the o rings of the quick disconnect fittings and receptacles can prevent the o ring from being damaged Please make sure that the quick disconnect fittings are locked A clicking sound can be heard once the fitting 15 locked O lt 9 2 Signal Connection Align the female connector of the laser signal cable to the J1 connector on the laser head Once it is aligned the connector can be pushed in Turn the locking ring of the connector in the clockwise direction until it is locked 3 Diode Power Connection Connect the female connector of the diode power cable to the J2 connector on the laser head Follow the same procedure of step 2 CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 34 4 RF Connection Connect the Q switch RF cable to the BNC connector no the laser head The connector should be locked as well by turning it clockwise until it stops Connections on eDrive and TEC Controller Figure 14 and Figure 15 are the pictures of the back panels of eDrive and TEC controller Figure 14 Picture of the back panel of eDrive CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 35 Figure 15 Picture of the back panel of TEC Controller 5 Signal Conn
22. Set FPS Settings to access the first pulse suppression features CW Q Switch Setup Menu Set Set Q Switch FPS Power Settings A A A A E KB SB CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 52 24 If the FPS function is not enabled press FPS Disabled to toggle to the enabled state FPS Setup Menu Set Set Set FPS Start Window Modulation Disabled Power Length Type A A A KX m a The display should now read FPS Enabled at the leftmost selection FPS Setup Menu Set Set Set FPS Start Window Modulation Enabled Power Length Type A A E E E 25 Laser is ready to fire If you prefer you can press menu see step 11 to return to the main menu Menu Current Shutter Emission CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 53 eDrive Firing Press current command button right of the display screen to view status display Menu Current Shutter Emission E Ba E 2 Status is displayed Current Isense Iset Freq Ch 1 0 0 A 20 2 A 7 00 kHz Output Off State A A Em E E 3 Press shutter command button to open the shutter for firing Then press the emission button to start the laser The lights above both buttons will illuminate and an audible warning signal will indicate the laser is about to start ramping Menu Current Shutter Emission CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 54 eDrive Interrupt Press the shutter button to temporarily stop th
23. User Manual Patara Laser Model PA 016 QTGP Copyright 2009 Cutting Edge Optronics a division of Northrop Grumman Corporation rights reserved Northrop Grumman Corporation products are covered by U S and foreign patents issued and pending Information in this publication supersedes that in all previously published material Specifications and price change privileges reserved Northrop Grumman Aerospace Systems Cutting Edge Optronics Inc 20 Point West Boulevard Saint Charles MO 63301 CEO UMAN 0031 REV B August 2010 CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 2 PREFACE This manual describes the installation operation and service of the Patara Laser System with the eDrive Nitro Diode Driver and Laser Controller The Patara Laser System emits laser radiation that can permanently damage eyes and skin ignite fires and vaporize materials The Laser Safety section contains information and guidance about these hazards To minimize the risk of injury or expensive repairs carefully follow these instructions Do not attempt to operate the laser system before carefully reading this complete operation manual If you have any questions on the product which have not been discussed sufficiently within the manual contact the manufacturer for complete instructions Failure to heed this warning may result in the destruction or serious damage to the device and will void the product warranty The trouble shooting sect
24. ature which may take 5 10 minutes 2 Turn the TEC controller and wait for the temperature stabilized Turn the eDrive POWER ENABLE key switch to ON Depress eDrive POWER switch LCD panel will be illuminated Press MENU to verify the current and Q switch settings Press EMISSION Button to fire the laser diode Press SHUTTER to begin laser output Wait for about 20 minutes to attain 9596 of nominal output power on tA A W Manual Interrupt Procedure 1 Press SHUTTER key on eDrive keyboard 2 Resume operation by pressing SHUTTER again Laser will resume operation with no audible warning Note The laser diodes are operated at set pumping current while the shutter is closed Shut Down Procedure 1 Press SHUTTER key to stop lasing CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 42 2 Press EMISSION key on eDrive The pumping laser diode will cease emission 3 Press POWER key on eDrive and hold for 5 seconds until display turns dark 4 Turn the eDrive POWER ENABLE key switch to OFF 5 Let chiller run for 1 2 minutes 6 Turn off TEC controller 7 Turn off chiller Please refer to the separate Operation and Maintenance Manual for the eDrive for detailed operating instructions 10 Control the Output Power Every laser application needs a particular laser power for the best results In some cases the output power has to be changed at different stages even in the same laser process Typically
25. aussian mode such as is used in the Patara laser The subject of laser cavity design for fundamental mode operation is too involved to pursue here but it involves the selection of cavity length and the characteristics of the pumped amplifier medium s diameter and focal power It is important to recognize that once the design parameters are selected for optimum fundamental mode operation they cannot be altered without perturbing the fundamental mode size in the amplifier which may lead to unacceptable changes in performance This is particularly important to the intensity of amplifier excitation pump power or drive current since this also determines its focal power Consequently the amplifier drive current must be kept at all times within a close tolerance of the design point Suppose however that it is necessary to turn the laser output power down from its maximum design value From the reasoning above one cannot just turn the power down to the amplifier thereby reducing its gain without unacceptable alterations in the beam characteristics because this is invariably accompanied by a change in its focal power While it is always possible to attenuate the beam externally to the laser oscillator cavity this is undesirable since it involves additional optical elements and expense A corresponding reduction of power however is possible if we could turn up the loss of the optical cavity while maintaining the gain at a constant level The Patara las
26. ck for hold off If the laser reaches within 5 of nominal power typical power meter accuracy and it has good beam shape and stability one should stop and replace the access screws in the cover CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 63 CHAPTER 6 Customer Service At Northrop Grumman Cutting Edge Optronics we are proud of the durability of our products Our manufacturing and quality control processes emphasize consistency ruggedness and high performance nevertheless even the finest instruments break down occasionally We believe that the reliability record of our instruments compares favorably with that of our competition and we hope to demonstrate that we provide superior service by providing dependable instruments and if the need arises service facilities that can restore your instrument to peak performance without delay When calling for service inside the United States dial 636 916 4900 To phone for service in other countries contact your sales agent 1 Before Contact Customer Service Before you pick up phone or send email out to ask help from NG Cutting Edge Optronics please fill out the questionnaire attached in the appendix of this manual It may take you a few minutes but it will help us to help you effectively In some cases it may prevent an unneeded return if a quick fix can be done onsite Please make of copy of the form Fill it with information as detailed as possible Either scan and e
27. ck to that location Oscillator beams are composed of transverse modes of simple structure related to a fundamental Gaussian intensity profile mode which is of the smallest lateral extent and divergence in the set Somewhere in the oscillator path is an aperture which forms the limit to the laser beam s transverse spatial extent It is advantageous for achieving the ultimate power and efficiency from a given laser system for this aperture to coincide with the aperture of the amplifier medium so that the oscillating beam fills the gain medium to the maximum extent If the diameter of the fundamental mode is much smaller than the limiting aperture higher order modes will oscillate and laser beam quality will degrade because these modes have not only larger transverse extent but also have higher divergence than the fundamental mode Beam quality is therefore related to the product of the diameter of the beam and its angular divergence as it propagates into the far distance and this product is conserved with propagation and transformation by optical elements such as lenses and mirrors Beam quality is also a measure of how small a spot a beam can be reduced by simple focusing higher quality beams giving focal spots of smaller diameter and higher intensity This CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 11 factor also impacts the amount of harmonic conversion which can be achieved and favors the restriction of laser operation to its fundamental G
28. d the other valve is the outlet The valves are opened and closed by rotation of the knobs on the valve ends 3 Desiccant Cartridge Replacement The desiccant cartridge Figure 17 removes excess moisture from inside the laser head It is located on the lid of the Patara laser head The desiccant cartridge must be periodically replaced so it should be checked at least weekly for exhaustion Exhaustion is indicated by a change in the color of the indicator paper in the top of the cartridge While any sector of the indicator paper in the cartridge top remains blue the cartridge can still absorb water When all three sectors of the indicator paper turn completely white or light pink the module has soaked up all the water it can absorb and therefore must be replaced The time between replacements varies with the humidity of the region in which you operate your laser and the frequency with which you open the laser head If the desiccant cartridges go bad in a very short time frame six weeks without the laser head having been opened contact your Cutting Edge Optronics field service engineer 000 M 5 S 10M 20 30 ORD 8813463 Figure 17 Desiccant Cartridge Top NS 3 To replace a failed cartridge simply unscrew the old cartridge and screw in a new one Tighten with a quarter turn of a wrench to form a good seal The desiccant cartridge used in the Patara laser head is an industry standard part part number 6803
29. e laser output The shutter light will be extinguished Menu Current Shutter Emission Toggle the shutter open again to resume firing Note firing will resume without an audible warning signal eDrive Shutdown Press the emission button to turn off current to the amplifier module Light will be extinguished Menu Current Shutter Emission If the emission button is toggled again output will resume after a warning signal is given and the laser ramps up to selected current CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 55 CHAPTER 5 Maintenance 1 Preparation for Shipment It is anticipated that in OEM applications the Patara laser will be installed in another system that will be shipped internationally The Patara optical assembly must be properly prepared for shipment if internal damage is to be avoided due to possible freezing of trapped water in the coolant lines The procedure is as follows 1 Ready a dry gas source in preparation for draining the system Oil free dry filtered air or dry nitrogen gas is recommended 2 Remove coolant connections from back of laser housing 3 Connect a dry gas line to the Coolant Out connector on housing Coolant lines must be purged in the proper direction or trapped water may remain in the lines inside the laser If this trapped water freezes it can cause lines to leak water when operation is resumed 4 Connect a drain hose with a proper quick disconnect fitting to the
30. ection Connect the male connector of laser signal cable to the receptacle labeled LASER INTERFACE on the back of eDrive Follow the same procedure of step 2 6 TEC Connection Connect the split branch wire of the laser signal cable to TEC controller Snap the 3 pin connector into the CONTROL connector on the TEC controller Use a screw driver to connect TEC power cables labeled as 1 and 2 as shown below CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 36 7 Diode Power Connection Connect the diodes power cable to the receptacle ARRAY POWER by following the same procedure of step 2 8 RF Connection Connect the QS RF cable to the RF OUT 1 connector as shown below 10 Make sure everything is connected properly and locked Check that all of the interlocks three BNC TRIGGER GATE IN QWS THERM INTLK INTERLOCK one black CHILLER and one white INTERLOCK shorting connectors are in place on the back of the eDrive see Figure 14 The black and white connectors are not in place during shipment and will need to be connected by the user 11 Layout all of the cables and water hoses And mount the water filter securely 7 First time chiller turn on procedure for PolyScience 6000 Series The first time turn on procedures should be similar for use with other chillers The following steps are for chillers of PolyScience 6000 series CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 37 Filling t
31. ei torpe A 2 PATARA LASER xiii cene viv ev reor E De p ved vto oes banana Ye Dev o ld eie De i eed 3 CLOSED LOOP 4 EDRIVE NITRO AND TEC DRIVER CHAPTER 4 INSTALLATION amp OPERATIONS eere eene ee enne nennen nnns nunt ahhh ess s esos ases assesses ss sees sss esee eese 28 1 LASER SYSTEM COMPONENTS 2 UNPACKING AEEKO EENE AEPA tike Eiei AAKA CENAE a 3 o ee eee e eee ec oae denote de dede dde died dee quo eee beds 4 EDRIVE ha ee dee ha 5 CHILLER Ajo Uo M M M 6 CABLES AND WATER HOSE CONNECTION a 7 FIRST TIME CHILLER TURN ON PROCEDURE FOR POLYSCIENCE 6000 SERIES ccccccccececececececececececesececesecececeseseseseseeeeess 8 FIRST TIME LASER TURN ON PROCEDURES ssessssesececeesessseeseeececseeaeeeeececeeseaaesesececseseaaeseeeesceeseeaeseseesceeeaaeaeseeeceeses 9 LARES 10 CONTROL THE OUTPUT POWER 11 EXTERNAL TRIGGERING AND FIRST PULSE SUPPRESSION 12 PATARA LASER WITH EDRIVE eene rr LL RL LELLA tesi sisse rt dass sess essere asa sess estate asas essen nina 5 eR ain 56 1 PREPARATION FOR SHIPMENT 5555 dedo oe stakan ae gel
32. ensing Location The Chiller should be installed on a strong level surface and be located as close to possible to the laser It should not be installed closer than 4 feet 1 4 meters to a heat generating source such as heating pipes boilers etc If possible the Chiller should be located near a suitable drain to prevent flooding in the event of leaks Do not place it where corrosive fumes excessive moisture excessive dust or high room temperatures are present For ease of positioning and maneuverability the Chiller is supplied with casters The front wheels can be locked to keep the Chiller in place while in use To help prevent voltage drops position the Chiller as close as possible to the power distribution panel Avoid voltage drops by using a properly grounded power outlet wired with 14 gauge or larger diameter wire The use of an extension cord is not recommended Note The Chiller may be located at a level below that of the equipment being cooled As long as the process remains closed overflow will not occur when adding cooling fluid to the Chiller reservoir Clearance Adequate clearance should be allowed on the front sides and rear of the Chiller for access to connections and components The front and rear vents of the Chiller must be a minimum of 24 inches 61 cm away from walls or vertical surfaces so air flow is not restricted Electrical Power An IEC power cord is provided with the Chiller It should be attached t
33. er achieves power reduction using the latter method The additional functionality of accepting and executing power level commands is built into the accompanying eDrive electronic system 2 System Description Patara consists of three interconnected subsystems The optics subsystem contains the laser oscillator the eDrive electronic subsystem provides power and control for the laser transmitter and the chiller which provides thermal control The user must supply prime power and cooling to the optics subsystem The interface relationships among these subsystems are shown in Figure 1 CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 12 532 nm gt 16 W 4 10 kHz Q Switch Control Diodes RF Signal Signal Array SHG Power Temp Y ume 110 VAC Figure 1 System Block Diagram Table 1 Table of Typical Performance of Patara Laser Parameter Units Laser Model PA 016 QTG Laser Type DPSS Nd YAG Wavelength 532 nm Repetition Rate 4 to 10 kHz Output Power 9 kHz 16 W Spatial Mode TEM 9 Beam Diameter 9 kHz 0 9 mm Beam Quality M2 9 kHz lt 13 Beam Divergence FWHM 9 kHz 1 7 mrad Pulse Width FWHM 9 kHz lt 80 ns Pulse to Pulse Stability 9 kHz lt 1 5 96 rms Output Stability Over 8 hours 9 kHz lt 3 rms CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 13 Table 2 Other Specifications Table
34. f the eDrive and chiller During installation it is advised that the performance of the laser be checked according to the factory s default settings Check that all of the eDrive settings are correct The water flow rate and coolant temperature have a significant impact on the laser performance Make sure that the flow rate is above 1 5GPM and the temperature of the chiller is right according to the test report 3 Peak up the laser power by tuning the temperature of the TEC controller The phase matching of the second harmonic generation SHG crystal is crucial for the Patara laser It is realized by setting the proper temperature on the SHG crystal The temperature is controlled by the TEC controller Figure 18 shows an example of the dependences of the power and pulse to pulse instability on the temperature of SHG crystal As shown in the example one should choose the middle point of the temperature band which is around 28 5 C according the above figure The laser may have the best power at 29 3 C in this example CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 59 but a small temperature change on the SHG could result in power fluctuation Laser Performance Dependence on Temperature of SHG Power Instability Power Instability rms 26 26 5 27 2n5 28 28 5 29 29 5 30 30 5 Temperature Deg C Figure 18 Example of dependence
35. f up to 3 W at the same rep rate and pulse width as the main beam This beam would be capable of causing eye or skin damage from direct exposure or specular reflection of the beam Always replace the screws in the alignment holes Also to aid in aligning the laser there are adjustment holes in the top cover of the laser housing to allow a technician to access the adjustment screw on the HR cavity mirror and HM cavity mirror The following images show the position and use of each adjustment screw The holes to access these adjustments are always open to air there are no screws to block these holes as they are not in the direct beam path CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 20 WARNING The access holes should be always covered unless an alignment is being performed Any dust invasion through these holes can cause damage to the mirrors and crystals inside the laser the holes on the laser enclosure should be sealed all times to prevent moisture penetration Moisture in the enclosure can degrade the lifetime of SHG crystal as well as the coatings on all optical components ACCESS HOLES FOR HR ADJUSTMENT LOCKWISE MOVES BEAM TO RIGHT COUNTER CLOCKWISE MOVES BEAM TO LEFT LOCKWISE MOVES BEAM DOWN COUNTERCLOCKWISE MOVES BEAM UP CLOCKWISE MOVES BEAM DOWN COUNTERCLOCKWISE MOVES BEAM UP CLOCKWISE MOVES BEAM TO RIGHT COUNTER CLOCKWISE MOVES BEAM TO LEFT o o ACCESS HOLES FOR HM ADJUSTMENT F
36. ght at 532 nm wavelength and 60 80 nanosecond pulse duration at repetition frequencies of 4 000 to 10 000 Hz It is a TEM laser and therefore has very high brightness The CW pumped Nd Y AG rod module in the oscillator is optically excited using arrays of laser diode bars operating at wavelengths in the neighborhood of 806 nm A laser oscillator consists of an optical amplifier in an optical cavity which serves to form a laser optical mode which can oscillate when the gain of the amplifier is sufficient to overcome the losses in the optical cavity One such loss is the amount which is allowed to escape the oscillator cavity through one of its mirrors and constitutes its useful output This basic approach suffices unless the output beam is desired at a wavelength which differs from the fundamental wavelength 1064 nm of the laser amplifier medium Nd YAG Various nonlinear optic techniques can serve to convert this beam to another wavelength but usually with some considerable loss of power or seen another way with a considerable residue of unconverted fundamental power This applies once one has allowed the fundamental radiation to leave the oscillator cavity and the beam is converted outside the cavity If instead the nonlinear conversion is done inside the oscillator cavity the leftover fundamental simply returns to the oscillator and is conserved to be amplified and returned to the nonlinear frequency converter This way nearly all the power in
37. he Reservoir WARNING Do not use untreated De ionized water in the system as it is aggressive in nature and can attack and corrode the metals within the laser head Remove the filler cap from the reservoir and using a funnel add Purelase 180 until it reaches the MAX line on the reservoir s fluid level gauge When full remove the funnel but do not replace the cap at this time Electrical Power Plug the Chiller s power cord into an appropriate electrical outlet Place the Circuit Breaker Power Switch on the rear of the instrument enclosure to the position Three decimal points will appear on the Temperature display two decimal points will appear on the pressure flow rate display Starting Process Fluid Flow Press the Power Button on the front panel The system startup sequence will begin and proceed as follows The pump will turn on and fluid will begin circulating through the system The set point temperature will appear briefly on the Temperature display after a few seconds it will be replaced by the actual fluid temperature Fifteen to 20 seconds after power up the compressor will begin operating WARNING Do not allow the chiller to fill the filter housing as air can become trapped within the system Make sure no air remains trapped in the lines resulting in a positive back pressure when chiller is turned off Positive back pressure can hold the flow switch closed even though flow is not being supplied to
38. igure 6 Patara Top View 3 Closed Loop Chiller WARNING Do not operate laser without cooling Inadequate heat dissipation will seriously damage the laser diodes and will void warranty The single most common cause of laser return for repair involves customer damage More than one third of all customer damaged lasers involve cooling problems Coolant problems almost always require the replacement of the diode arrays the single most expensive component in CEO lasers Read the following section carefully to avoid damaging arrays CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 2 Depending on the model of Patara laser the required heat capacity and flow rate changes A table listing the requirements for each model is shown below Model Heat Capacity Minimum Flow Rate PA 016 QTG 800W 1 5 gpm 5 7 lpm 1 Heat Capacity should be greater than the laser s power consumption Chiller requirements M Capable of recommended flow rate at 60 psi Purelase 180 coolant Filter connected between chiller and inlet on laser Chiller Heat Capacity gt Laser Power Consumption M Flow sensor Installed internally on Patara lasers Replace coolant with fresh every six months 1 The actual operating pressure should be somewhat lower than 60 psi If your chiller can achieve the required minimum flow rate through the laser with a lower water pressure typically 55 psi it is acceptable 2 Clean coolant is important to
39. ion is intended to help guide you to the source of problems Do not attempt repairs while the unit is under warranty instead report all problems to Northrop Grumman Aerospace Systems Cutting Edge Optronics for warranty repair We welcome your comments on the content and style of this manual The last page is a form that can be used to describe issues with the laser We also suggest that you record information about the laser such as power settings time and date Thank you for your purchase of NG Cutting Edge Optronics instruments CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 3 Table of Contents PREFACE E E E E 3 TABLE OF CONTENTS oss 4 LST OF FIGURES ii na orae ex wean a AAA ASS 6 LIST OF TABLES E E E E E 7 ERE E E E O 8 ACRONYMS EOM 9 CHAPTER 1 INTRODUCTION si 10 1 THEORY OF OPERATION Sm e Aver eere baeo ii ci tero Bo ts o an s vet Eo v ER D dn Se E P Se A 10 2 SYSTEM DESCRIPTIONS Satine Dev naar 12 CHAPTER 2 LASER SAFETY A A Seassa 16 1 PRECAUTIONS FOR SAFE OPERATION OF CLASS IV LASERS ssssseeecececcessseecececeaeensseecececsanensececeeeceeueneececessaeegeneeeeeeeees 17 2 CENTER FOR DEVICES amp RADIOLOGICAL HEALTH CDRH enhn nhan sse tnn 17 CHAPTER 3 SYSTEM DETAILS 5 5 eene eoe pror er eo ag NA A ia 19 1 INTRODUCTION eite rt
40. irror and observe the output power Once a maximum is found try adjusting the vertical control of HM mirror to maximize power Make small adjustments to the horizontal angle of HR mirror and observe the output power Once a maximum is found try adjusting the vertical control of HR mirror to maximize power Go back to steps 9 3 and repeat the optimization steps until there are no significant performance improvement If the laser power can t be restored to the specification or the laser is not stable then the procedure of Walking the Cavity can be tried o Walking the cavity is sometimes required to optimize the laser and involves combining mirror mount and SHG crystal temperature adjustments o Reduce current by 1A while making coarse adjustments Return current to normal when making fine adjustments CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 62 o Make a horizontal adjustment to the HM mount Recover the laser power by making a similar adjustment to the horizontal control of the HR mount Check and adjust the temperature of SHG crystal o Continue if improvement is noted If no improvement try the opposite directions o Perform the same procedure with the vertical adjustments of the HM and HR mount o Typically SHG temperature adjustment is not needed when doing vertical adjustments Periodically check for hold off when making these adjustments see the steps in chapter 5 of the user manual to che
41. keeping coolant lines from clogging Untreated tap water is not an acceptable coolant and may cause damage Suitable Coolants include a NALCO Purelase 180 b Distilled water and the combined algaecide and corrosion inhibitor Optishield Plus from Opti Temp Inc Traverse City MI phone number 231 946 2931 3 The filter should be capable of removing particles 5 or larger The filter should be changed at a minimum of every six months The filter should be changed more frequently if the chiller manufacturer recommends a shorter interval 4 When not using CEO drive electronics verify that flow sensor interrupts current to diodes less than 500 milliseconds after a low flow condition occurs Avoid with chillers De ionized water Iron or Aluminum parts in plumbing loop Operation below air condensation temperature 1 NG CEO has exposed bare copper inside the coolant loop For this reason NG CEO does not recommend using untreated DI water If DI water is used as the coolant it is very important to maintain the water resistivity between 300 700 K ohms and to keep the water slightly basic i e keep the water above 8 0 pH CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 22 2 The Patara laser is environmentally sealed but not hermetically sealed Atmospheric conditions near the exterior of the laser will mimic conditions inside laser head If you notice water in the immediate vicinity of the laser shut the
42. laser system down immediately Check to see if the water is coming from the laser head If so return the laser for repair If not repair the source of the leak and allow the unit to dry thoroughly before resuming operation The laser system has a coolant loop to prevent thermal damage to the laser diodes The diodes should be kept at approximately 20 35 See the final test report for optimum temperature and flow rate settings for your laser Operating the laser diodes for even a short period of time a few seconds without coolant will cause permanent damage To help prevent this all CEO drive electronics are equipped with a coolant interlock This interlock interrupts drive current to the diodes when coolant flow rate drops below set point CEO recommends testing the function of the flow interlock before firing when first setting up the laser system Turn the eDrive on without current applied to the laser and then turn the chiller off A coolant interlock fault should appear on the screen By testing the interlock with no current to the laser there is no risk of damaging the laser WARNING Do not operate coolant system below air condensation temperature dew point at laser head Condensation on the diode arrays can seriously damage the laser head and will void the warranty Consult a CEO field service engineer if you have any questions The air condensation temperature dew point 1s the highest temperature a surface can be a
43. m femto 10 f inductance Henry H atto 10 5 a magnetic flux Weber Wb magnetic flux Tesla T density luminous candela cd intensity temperature Kelvin K CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 8 Acronyms The following acronyms are in Northrop Grumman Aerospace Systems Cutting Edge Optronics manuals AO BNC CDRH CEO CFR CW EO FET FDA FPS FWHM GPM HR HV IR KTP LBO Nd YAG NGST NIR OEM PRF PSI RF RMS SHG TTL UV VAC Acusto Optical type of Q switch Bayonet Neill Concelman Connector Center for Devices and Radiological Health U S Food and Drug Admin Cutting Edge Optronics Code of Federal Regulations Continuous Wave Electro Optical type of Q switch Field Effect Transistor U S Food and Drug Administration First Pulse Suppression Full Width Half Max Gallons Per Minute High Reflector High Voltage Infrared Potassium Titanyl Phosphate Lithium Triborate Neodymium doped Yttrium Aluminum Garnet Northrop Grumman Space Technology Near Infrared Original Equipment Manufacturer Pulse Repetition Frequency Pounds per Square Inch Radio Frequency Root Mean Squared Second Harmonic Generator Transistor Transistor Logic Ultraviolet Volts Alternating Current CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 9 CHAPTER 1 Introduction 1 Theory of Operation Patara Laser is a Q switched intra cavity frequency doubled laser oscillator The output consists of pulses of li
44. m or at specular reflection even with protective eye wear on Always wear laser safety eyewear that is optically dense at the wavelengths of operation 798 816 nm pump light 1064 nm fundamental 532 nm second harmonic Set aside a controlled access area for laser operation limit access to those trained in the principles of laser safety Post readily readable warning signs in prominent locations near the laser operation area Use safety interlocks on all entryways All CEO system control electronics are provided with interlock inputs to preclude operation with an open safety door eo Enclose beam paths wherever possible Set up experiments so the laser beam is below eye level eo Work in an area that is well lighted to avoid dilation of pupils eo Set up a target for the beam Set up shields to prevent reflected beams from escaping the laser operation area lt View an infrared laser beam with a protected image converter at an oblique angle reflecting from a diffuse surface Insure that all electrical connections are made in a safe manner Where possible position equipment so that electrical connections are shielded from accidental touch No smoking eating or drinking should be allowed in laser areas Never leave an operating laser unattended 2 Center for Devices amp Radiological Health CDRH Compliance This laser product complies with Title
45. mail or fax it to us and bring it to the attention of our service department 2 Module Replacement Even though the pump module is user replaceable we suggest that the laser head be returned to CEO for the upgrade or contact CEO for detailed instructions about module replacement 3 Return of the Instrument for Repair DON T SHIP ANY INSTRUMENTS TO NG CEO BEFORE YOU GET RETURN MERCHANDISE AUTHORIZATION RMA Contact CEO or your local distributor for RMA and shipping instructions and forward the instrument prepaid to the destination indicated CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 64 CAUTION Failure to obtain proper shipping instructions may result in damage to the instrument Special Cutting Edge Optronics packing boxes designed to securely hold instruments during shipment should be used If shipping boxes have been lost or destroyed we recommend that you obtain a new one for a nominal charge from NG Cutting Edge Optronics Remove all water from laser prior to packaging for shipment See Chapter 5 for details Place laser in a sealed ESD bag inside shipping container Place some form of desiccant in bag WARNING Residual water damage due to condensation or expansion when tightly sealed can be catastrophic to the diode arrays or laser rod if not dealt with properly such damage is excluded from warranty coverage CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 65 4 Contacting Cutting Edge Opt
46. mp sec Rotate Dial to Change Value 1x A E E CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 47 9 Make sure the slew control is enabled If not press the button to toggle from disabled to enabled state Channel 1 CW Setup Menu Slew Set Control Standby Disabled Current A A A A E E m 10 Once slew control is enabled press more to advance to the next menu Channel 1 CW Setup Menu Slew Set Control Standby Disabled Current 11 Press set current limit Channel 1 CW Setup Menu Set Current Limit A A X m m CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 48 12 Setting the current limit stops operator from accidentally setting the current above a prescribed limit CEO recommends a 30 0 Amp current limit Set value by turning the selection knob Press done to enter value Set Channel 1 Current Limit Present Value 30 0A Rotate Dial to Change Value 1x Done A A A E BB 13 To the right of the eDrive Nitro screen is a row of four labeled buttons and two LEDs Press the menu button to return to the main menu Shutter Emission 14 Press channel setup Menu Current Main Menu Channel Comm Setup Setup Functions Interface Setup Utility CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 49 15 Select Q Switch Channel Setup Menu Internal Channel 1 Q Switch Trigger Enabled A E pq E
47. nsation on the SHG crystal can seriously damage the crystal Turn on and check the settings of the eDrive 1 Flip power switch on the back panel of the eDrive to the ON or position 2 Make sure that the red EMERGENCY button is released Turn on the eDrive by turning the key to ON position and pressing the POWER button to power up the eDrive 3 Check all the laser parameters in the eDrive Here are the correct settings for the Patara laser Channel enabled Standby current 0 A Slew control Enabled Slew Rate 5A sec Current limit 30A Q switch enabled QS Frequency 9 KHz QS window width 5 us Q switch power 100 CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 40 e FPS Enabled e FPS mode standard e FPS delay 250 us e Starting power see report e FPS widow length see report e Modulation type see report e PPK open offset 0 e PPK closed offset 0 e Internal trigger enabled e Shutter FPS enabled e Voltage dropout 20 0V e Current Tolerance Enabled e Set Current Tolerance 4A 4 Make sure that there are no objects in the laser beam path except for the negative lens and power meter MAKE SURE PROPER LASER SAFETY EYEWEAR IS WORN TO PROTECT YOUR EYES 5 Once all the parameters are set correctly and temperatures of TEC driver and chiller are stabilized set the current at 10A and press the EMISSION button 6 Press the SHUTTER button to open the laser shutter Graduall
48. nt Cartridge sie tet ta c e UE VETERE ala ia 57 Figure 18 Example of dependence of power and pulse to pulse instability on the temperature of SHCr crystals is era A eee 60 Figure 19 Example of dependence of laser performance on the pumping current 61 Figure 20 Illustration of accessible holes for HR and HM cavity mirror adjustment 62 CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 6 List of Tables Table 1 Table of Typical Performance of Patara Laser 13 Table 2 Other Specifications 6 ice eee A A cae iene 14 Table 3 Table of Air Condensation Temperature at Given Ambient Air Temperature degrees and Relative Humidity percent ese abo a o Rove eu de ge 26 CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 7 SI Units The following System International SI units abbreviations and prefixes are in NGAS Cutting Edge Optronics Inc manuals Quantity Unit Symbol Abbrv Prefixes mass gram g tera 107 length meter m giga 10 time second S mega 109 M frequency Hertz Hz kilo 10 k force Newton N deci 107 d energy Joule J centi 10 c power Watt W milli 107 m electric current Ampere A micro 10 u electric charge Coulomb C nano 10 n electric Volt V pico 105 p potential resistance oh
49. o the receptacle on the rear of the enclosure Make sure that the power outlet used for the Chiller is properly grounded and matches the voltage and frequency indicated on the identification label on the back of the Chiller The use of an extension cord is not recommended However if one is necessary it must be properly grounded and capable of handling the total wattage CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 31 of the unit The extension cord must not cause more than a 10 drop in voltage to the Chiller Chiller Cleaning Procedures ONE HAS TO MAKE SURE THAT THE CHILLER WILL NOT CONTAMINATE THE LASER HEAD Please follow the proper procedures to clean the chiller before it is connected to the laser head The procedures are in the CD for the manuals It is also available through the customer service at NGCEO WARNING DO NOT PLUG THE CHILLER INTO THE ELECTRICAL OUTLET UNTIL THE UNIT IS READY FOR STARTUP 6 Cables and Water Hose Connection 3 8 3 8 reinforced CHILLER male hose 8 SIEDID RIENI From laser RETURNO 3 8 3 8 reinforced hose 18 ose 8 SUPPLY 4 fo lt I ahr ON 3 8 3 8 3 8 male male To laser COOLANT barb barb barb O 180 SD S eX CEO P N 460 CCL 100 Ze Filter assembly with lt 5 micron XS NAS Ss SO EIA SSE RO ARZT gt
50. of power and pulse to pulse instability on the temperature of SHG crystal 4 Peak the laser power by tuning the current Figure 19 shows an example of the dependence of the output power and pulse to pulse instability of Patara laser As one can see the laser power increases as the pumping current is increased The laser had the peak power around 23A in this case One should search for the peak power by changing the current in steps of 0 1A around the operating current Once the peak power is found one should lower the current to have 99 5 of the peak power Set it as the operating current In this example the operating current would be 22 9A according to figure 19 The slight difference between the actual operating current and the one on the test report may be due to the performance difference of the chillers An increase of in the pumping current can compensate for the aging of the laser diodes inside the Patara laser CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 60 Laser Performance Versus Current Power Instability T Ul 1 19 5 20 20 5 21 21 5 22 22 5 23 23 5 24 Pumping Current A Figure 19 Example of dependence of laser performance on the pumping current 5 Peak up the laser with adjustment of the cavity mirrors WARNING MAKING MIRROR ADJUSTMENTS CAN BE NON REVERSIBLE IT CAN BE DIFFICULT TO RETURN THE LASER TO THE INITIAL STATE
51. or in the ATP Verify that the eDrive QSW power control is at 100 Make sure that the Q switch is enabled Is the Q switched triggered at 9 kHz and triggered by internally Verify the chiller set point temperature and flow rate are correct Both the laser and chiller should be in operation for at least 20 minutes to reach full power and stability before any adjustments are made If these conditions are met then consider adjustments Do not adjust the laser system unless these conditions are verified 2 Problems with Laser Output Power Low Output Power 0 01 16W Possible cause low Q switch power Check the setting of the Q switch power in the eDrive If it is not set to 10096 change it CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 69 Possible cause power meter problem Check with another good power meter and make sure the measurement is operating correctly Possible cause pumping current was low Check the setting current and actual current too high current or low current result in low power Possible cause the temperature of the water is not set properly Check with the chiller Make sure the chiller has right water flow rate and temperature to the laser head Possible cause the phase matching condition of SHG crystal is not met Check the temperatures of TEC driver and make sure it works properly Possible cause the laser is running in CW mode or problem with hold
52. orces applied to the laser head Make sure that the flow rate to the laser head 1s above 1 5GPM and the water flow is not intermittent Make sure the laser has good output power A laser with high modulation loss or low pumping current is sensitive to the perturbation Make sure the pumping current is stable Make sure the Q switch hold off is good 3 Problems Related with eDrive CW Power Only No Optical Pulsing Perform initial check on system This is typically caused by wrong settings or an eDrive problem Check setting procedures or see eDrive troubleshooting section for procedures and details Hold Off Failure Perform initial check on system This is can be Q switch low power fault of an eDrive problem See eDrive troubleshooting section for procedures and details It can also be caused by a failing QSW This is an internal laser repair In some cases a re tuned laser can suffer from hold off loss The fix is to change the angle of the QSW Since QSW angle cannot be adjusted outside the laser internal service will be required CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 71 4 eDrive Operation and Troubleshooting The eDrive has built in diagnostics to alert the user of fault conditions Following are the more common error reports and suggested remedies Consult the eDrive manual for more details Laser Water Fault Detected Check chiller for operation and or low water level Hardware
53. r the Administration on Pollution Control of Electronic Information Products No 39 Order of the Ministry of Information Industry of the Peoples Republic of China NGST CEO includes the following information about our laser modules See next page CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 67 PELEAN AFAR I Fill Northrop Grumman Cutting Edge Optronics Pm 20 Pointe West Blvd St Charles MO 63301 USA PAGO 69 Mirus Series Laser Systems i Models MI xxx xxxx xxxx and ARAFAT FAR Wm mara mina 0 RI AS MEA Fo SJ T 11363 2006 MEM MMA RLF X PARI 1 ER SJ T 11363 2006 MC ER The translation document above is according to clause 6 2 of SJ T 11364 2006 CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 68 CHAPTER 7 Troubleshooting 1 Laser Troubleshooting Introduction The troubleshooting section is intended to help guide you to the solutions of problems encountered during normal use WARNING Do not attempt repairs while the unit is under warranty instead fill out the form in the appendix in this manual and report all problems to Northrop Grumman Aerospace Systems Cutting Edge Optronics for warranty repair Before starting any adjustments or troubleshooting procedures go through this checklist Is the eDrive operating at the correct output current Verify the current set point is that called f
54. read this section carefully before installing or operating your laser We recommend that a Cutting Edge Optronics trained Service Engineer performs all service and repair operations If you do plan to service your laser please follow the procedures in the Service and Repair section of this Manual CAUTION The Patara Laser is a Class IV High Power Laser whose beam is by definition a safety hazard Avoid eye or skin exposure to direct or scattered laser radiation Avoid direct viewing of the beam or its specular reflection Follow the instructions contained in this manual for proper installation and safe operation of your laser We recommend the use of protective eyewear at all times selection depends on the energy and wavelength of the laser beam as well as operating conditions Consult ANSI ACGIH or OSHA standards for guidance CAUTION Use of controls adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure WARNING At all times during installation operation maintenance or service of your laser avoid exposure to laser or collateral radiation exceeding the accessible emission limits listed in Performance Standards for Laser Products United States Code of Federal Regulations 21 CFR 1040 10 d CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 16 1 Precautions for Safe Operation of Class IV Lasers Never look directly into the laser bea
55. ronics Phone 1 636 916 4900 Fax 1 636 916 4994 Address Cutting Edge Optronics 20 Point West Blvd St Charles MO 63301 USA Web site www northropgrumman com Search ceolaser Email st ceolaser info ngc com Sales support 1 636 916 4900 Service support 1 636 916 4900 Technical support 1 636 916 4900 8 00 a m to 5 00 p m Central time After office hours please leave a voice mail message Outside North America contact a Cutting Edge Optronics sales office or distributor see the Cutting Edge Optronics web site for a list of offices CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 66 5 Warranty CEO sends the applicable warranty to the prospective purchaser with each quote Contact CEO Sales and Marketing personnel for additional copies or to answer any warranty questions 6 Disposal In accordance with WEEE Directive 2002 96 EC of the European Parliament and of the Council of 27 January 2003 on waste electrical and electronic equipment Cutting Edge Optronics accepts the return of our products for disposal Please package the products as directed for a return for repair Contact NGST CEO or your local distributor for shipping instructions and indicate inform them of a return for disposal Forward the instrument prepaid to the destination indicated 7 ROC ROHS Declaration In accordance with the Clause 6 2 of Marking for Control of Pollution Caused by Electronic Information Products SJ T11364 2006 for Measures fo
56. t and still cause water to form on the surface from the ambient water vapor The air condensation temperature is dependent on the surrounding air s temperature and relative humidity If a surface such as a laser diode is cooled at or below the condensation temperature water may collect on that surface A formula for calculating dew point is given below along with a calculated table All temperatures are given in Celsius CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 23 Equation 1 Condensation Temperature T 237 7xa T RH where a T RH 17 27xT Lr 17 27 a T RH 2371 4T 100 T is the ambient air temperature in degrees Celsius 0 T 60 RH is the relative humidity in percent 1 RH 100 96 and T is the air condensation temperature For example if the chiller is running at 22 C then look at the curve labeled 22 C on Figure 3 3 next page Suppose the ambient air near the laser is at 28 C 82 F look where the gridline for air temperature of 28 C intersects the curve for diode temperature of 22 C At a relative humidity of 70 or greater condensation will form on the laser diodes Control the humidity level inside the laser is very important for the lifetime of SHG crystal The desiccant cartridge on the top cover can help to removes excess moisture from inside the laser head WARNING Do not operate the laser without a functional desiccant cartridge Condensation on the diode arrays can seriousl
57. that the beam size is larger and the power density is below the damage threshold of the power meter Figure 10 Basic setup for the laser power test 4 eDrive Setup Input Power Use only power cords suitable for your driver Use a power source that delivers voltage in the range of 90 to 250 VAC RMS 47 to 63 Hz Power switching is done automatically there are no configuration switches to set for high or low voltage ranging Observe recommended fuse selection for each voltage range ACInput Frequency Fuse Ratings F1 F2 120V 15A 47 63 Hz 15A 240V 7A 47 63 Hz 8A Mounting There are four holes on the front panel of the eDrive designed for the mounting into an EIA 310D compliant rack If the eDrive is to be used on a desktop or table top it is recommended that the eDrive be equipped with feet to prevent the driver from marring the surface when it is moved The eDrive must be secured Clearance Adequate clearance should be allowed on the front sides and rear of the eDrive for access to connections and components The front and rear vents of the CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 30 eDrive must be a minimum of 24 inches 61 cm away from walls or vertical surfaces so air flow is not restricted 5 Chiller Setup Ambient Temperature and Relative Humidity The Chiller is designed for indoor installation in ambient temperatures between 5 and 30 C 41 and 86 F relative humidity should not exceed 80 non cond
58. the output power of a laser can be varied by changing the pump current However the active laser crystals can exhibit strong thermal lensing which is related to the pump current Variation of the pumping current results in the change of the thermal lensing Therefore the position of the focal point moves as the pump current is varied This is not desirable for most laser applications especially laser micro machining The output power of Patara laser can be changed either by changing the pump current or by changing the Q switch Power This unique patented technology allows users to adjust the laser output power continuously without changing the pump current The focal point is kept at the same position regardless of the power level This feature is very useful for precision micro machining when different power levels are required for the process Please refer to step 21 in section 12 of this chapter for setting details 11 External Triggering and First Pulse Suppression The laser may be externally triggered using a TTL signal of 300 500 ns duration The signal may be input via the BNC connector labeled External Trigger on the back of the eDrive controller CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 43 Figure 16 First Giant Pulse with the Setting of FPS disabled WARNING The FPS has to be enabled and parameters for FPS have to be set properly Failure to suppress the first giant pulse may cause the internal optical damage as
59. ven Ambient Air Temperature degrees C and Relative Humidity percent If required to operate a laser in conditions near to the condensation temperature take precautions to keep the laser dry The laser should be operated inside an area that is purged with gaseous or encased in a sealed enclosure with a desiccant 4 eDrive Nitro and TEC Driver The eDrive Nitro is a menu driven diode driver and laser controller The eDrive Nitro regulates the diode drive current controls the AO Q switch pulses and monitors the various interlocks Also the front panel has a convenient emergency stop button to halt laser output CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 26 Additional information about the eDrive Nitro can be found in the eDrive user s guide NORTHROP GRUMMAN Di 0 0 0 LL EMERGENCY STOP Figure 8 eDrive Nitro Control Panel The TEC driver is use to control the temperature of the SHG crystal It has a digital display of temperature The front panel controls may be used to adjust the set temperature or view actual or alarm temperature The user friendly communications software requires no prior programming experience to establish operation A command set is provided for qualified personnel to program a software interface and data log information The controller is provided in a plastic case suitable for bench top use CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 27
60. well as damage to the work piece Figure 16 show the RF signal output to the Q switch without FPS and the laser pulse train with the first giant pulse If the peak power of these giant pulses is high enough it can cause the damage on the mirrors as well as crystals in the laser The giant pulse forms when the lasing was stopped while the pumping light is still on during the laser processing cycle The amplitude of the giant pulse is dependent on the non lasing duration as well as the pumping current For each type of laser processing a particular pumping current and pulse repetition rate are needed The giant pulse can be suppressed by enabling FPS and setting the proper FPS parameters For detailed information please refer the section of Configuring the Integrated AO Q switch RF Driver on page 37 of eDrive user manual To set the FPS properly one needs a photodiode detect with response time 1ns and an oscilloscope CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 44 12 Patara Laser with eDrive Nitro Before operating your Patara laser follow these setup steps eDrive Setup 1 Boot up eDrive A banner detailing the firmware version will briefly appear eDrive Laser Sytem Controller Firmware Version 1 5 0 2 Then the display will switch to the main menu Select the Channel Setup menu i e Press button marked in picture below Main Menu Channel Interface Utility Setup Setup Functions A A X
61. xternal gate mode 9 Gradually increase the current to the operation current 6 Extend Lifetime of Laser Diodes The specification for laser system optical output is provided in the final test report delivered with the system During its early lifetime the laser diodes will deliver this specified power at or below the preset current limit As the diodes age current increases may be required to maintain power and beam quality so the CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 58 diodes can be used for much long time Once the maximum current of 30 is reached one should consider replacing new diodes or upgrading the laser Please contact CEO for detailed information 7 Laser Performance Optimization When the laser is initially installed or the laser performance has degraded due to the aging of laser diodes possibly it is necessary to optimize the laser performance For this procedure one should see the green light from the laser In the absence of any visible output please look into the trouble shooting or contact CEO for help To reach the best performance the laser may just need very little adjustment for the optimization Here are the procedures one should follow 1 Wait for the laser reach thermal stabilization Both the laser bench temperature and environmental temperature significantly impact the laser power Wait for the laser to be thermally stabilized before attempting any adjustment 2 Check the settings o
62. y increase the current until the laser is firing at very low power Move the negative lens and power meter so that the beam is going through the center of the lens and hitting the center of the power meter 7 Gradually increase the current set point to the operating current specified in the test report Don t touch any part of the laser and wait for the laser to stabilize for 1 hour usually the laser takes around 20 minutes to reach 95 of the maximum power Then check if the power is close to the result on the test report 8 Usually the laser needs optimization for the first installation due to the slight differences of environments chiller settings and vibration of the transportation If so please follow the laser performances optimization procedures in the next chapter CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 41 9 Daily Operation Output energy and repetition rate of the Patara System are adjustable over a wide range However operating protocols must be observed in order to assure operation without risking internal damage to optical components Table 1 1 gives a summary of the recommended operation settings for achieving nominal performance levels CAUTION The output beam of this system is a safety hazard Avoid viewing the beam directly Turn On Procedure Turn chiller ON Verify correct flow rate and temperature setting to value specified on laser test sheet Wait until chiller has achieved proper temper
63. y damage the laser and may void warranty CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 24 Constant Dew Point Lines for Ambient Temperature and Relative Humidity 12 16 20 C 24 28 100 95 90 85 BKC 80 75 70 65 60 55 50 45 26 40 35 22 Relative Humidity 30 18 C 25 14 C 20 10 C 15 6 C 10 5 0 10 13 16 19 22 25 28 31 34 37 40 Temperature C Figure 7 Constant Dew Point Lines for Ambient Temperature and Relative Humidity CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 25 Relative Humidity 1 10 20 30 40 50 60 70 80 90 100 10 439 20 2 11 9 68 30 01 26 48 67 84 100 2 426 18 7 103 5 0 12 19 45 67 87 104 120 M e er RU e e 16 402 156 7 0 L6 24 56 82 105 125 144 160 18 390 141 53 02 42 74 101 124 145 163 180 20 378 125 36 19 60 93 120 144 164 183 200 22 36 6 11 0 2 0 36 78 111 139 163 184 203 220 24 354 95 04 53 96 129 157 182 203 223 240 26 342 380 13 71 113 148 176 201 223 242 260 28 33 0 6 5 29 88 131 166 195 220 242 262 28 0 30 3L8 49 46 105 149 184 214 23 9 262 282 30 0 32 306 34 62 122 167 203 232 258 281 30 1 32 0 34 295 19 78 139 185 221 25 1 27 7 300 32 1 34 0 36 283 04 95 157 202 239 270 29 6 320 341 360 40 26 0 2 0 12 7 191 23 8 27 6 30 7 33 5 35 9 38 0 40 0 Table 3 Table of Air Condensation Temperature at Gi
64. you Date Name Company or Institution Department Address Laser Model Number Serial Number Chiller Model Number Serial Number eDrive Model Number Serial Number Laser Manufacture Date Total laser lifetime hours CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 73 Questions What is the water flow rate GPM CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 74 Have you changed any settings recently yes no CEO UMAN 0031 Rev B Cutting Edge Optronics NGC Email or fax to Northrop Grumman Space Technology Cutting Edge Optronics Inc 20 Point West Boulevard Saint Charles Missouri 63301 USA 636 916 4900 tel 636 916 4994 fax Email st ceolaser info ngc com CEO UMAN 0031 Rev B Cutting Edge Optronics NGC 76

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