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1. What is the laser cavity configuration What is the measured power W What is the operating frequency Hz What is the operating pulse width us When did the problem happen Have you changed any settings recently yes no 2014 Northrop Grumman Systems Corporation 43 RBAT PowerPULSE User Manual Appendix A Customer Service What are the changes made recently to the system Please describe the problem or issue in as much detail as possible Suggestions Email or fax to Northrop Grumman Cutting Edge Optronics Inc 20 Point West Boulevard Saint Charles MO 63301 USA Phone 636 916 4900 Fax 636 916 4994 Email ngceoservice ngc com 2014 Northrop Grumman Systems Corporation 44 RBAT PowerPULSE User Manual Appendix B System International Units The following System International SI units abbreviations and prefixes are used throughout Cutting Edge Optronics user manuals Quantity Unit Symbol Abbrv Prefixes mass gram g tera 10 T length meter m giga 10 G time second s mega 10 M frequency Hertz Hz kilo 10 k force Newton N deci 10 d energy Joule J centi 1 0 c power Watt W milli 10 m electric current Ampere A micro 1 0 u electric charge Coulomb C nano 10 n electric potential Volt V pico 10 p resistance ohm Q femto
2. 10 f inductance Henry H atto 1078 a magnetic flux Weber Wb magnetic flux Tesla T density luminous intensity candela cd temperature Kelvin K 2014 Northrop Grumman Systems Corporation 45 RBAT PowerPULSE User Manual Appendix C Acronyms Acronym ACGIH ANSI AR AO CDRH CEO CFR CW DC EO ESD FET FDA FWHM GaAlAs GPM HR HV KTP LBO MCC Nd YAG Nd YLF NG 2014 Northrop Grumman Systems Corporation Appendix C Acronyms Description American Council of Government Industrial Hygienists American National Standards Institute Anti Reflective Acusto Optical type of Q switch Center for Devices and Radiological Health U S Food and Drug Administration Cutting Edge Optronics Incorporated Code of Federal Regulations Continuous Wave Direct Current Electro Optical type of Q switch Electro Static Discharge Field Effect Transistor U S Food and Drug Administration Full Width Half Max Gallium Aluminum Arsenide Gallons Per Minute High Reflector High Voltage Infrared Potassium Titanyl Phosphate Lithium Triborate Meters Concave Neodymium doped Yttrium Aluminum Garnet Neodymium doped Yttrium Lithium Floride Northrop Grumman 46 RBAT PowerPULSE User Manual Acronym NIR OEM OSHA PRF PSI SHG TEC TTL USA VAC 2014 Northrop Grumman Systems Corporation Appendix C Acronyms Description Near Infrared Original Equipmen
3. External DC Power Supply Closed Loop Re circulating Chiller Specifications 2014 Northrop Grumman Systems Corporation 1 RBAT PowerPULSE User Manual Chapter 1 Introduction Theory of Operation NG CEO diode pumped solid state lasers and pump modules use temperature tuned GaAlAs laser diodes These diodes replace arc lamps or incandescent light sources as the optical pump source The principal advantages of this approach include Longer lifetime More compact size More efficient operation Elimination of the need for external cooling tower water Reduced thermal lensing in the active medium The RBAT PowerPULSE module is available in Nd YAG with the laser rod AR coated for the highest gain wavelength of this material 1064 nm NG CEO also offers the RBAT PowerPULSE with a Nd YLF rod Throughout this manual we will refer only to the Nd YAG laser medium The RBAT PowerPULSE module is constructed within a durable and rigid structure Exterior components and connections are shown in Figure 1 1 The diode optical output power is radially coupled into the laser rod 2014 Northrop Grumman Systems Corporation 2 RBAT PowerPULSE User Manual Chapter 1 Introduction Screw On Beam Tube Support Power Lugs Water Inlet Outlet Figure 1 1 Exterior Components and Connections Temperature Tuning of Laser Diodes The laser diodes are located within the RBAT PowerPULSE module and tuned wavelength matched via the close
4. Figure 2 1 Standard Safety Warning Sign Center for Devices and Radiological Health CDRH OEM Product The RBAT PowerPULSE module is considered a component according to the Food and Drug Administration Code of Federal Regulations Title 21 Section 1002 1 b for use in an end system and therefore does not fully comply with all the requirements of the Code of Federal Regulations for laser based systems The RBAT module is capable of emitting Class IV radiation and extreme care must be exercised in its installation and operation Only persons familiar with the safety precautions and practices in this manual should operate the laser product 2014 Northrop Grumman Systems Corporation 13 RBAT PowerPULSE User Manual Chapter 2 Laser Safety yunder module Figure 2 2 Radiation Control Drawing QCW OPERATING LIMITS or Service by qualified Current Oxa SERIAL NO rsonnel only DATE pe COOLING TEMP XX XX C NO USER SERVICEABLE PULSEWIDTH XXX PARTS WITHIN FREQUENCY set not to j exceed duty cycle limit DUTY CYCLE X XX Beryllium Oxide BeO Alert ie 2 gt D OMITTED PAON Nes APTE This product contains theO raistom BeO aust can have tax ofects wher ringed Do not dsasserrele l es Unt w ranty Void Figure 2 3 Warning Labels Safety Device Checklist 1 Verify that all labels are securely affixed 2 Verify that the safety interlock system is working properly 3 Locate the module so that o
5. There are no user serviceable parts within the laser module Contact NG CEO Technical Service for repairs Before lasing the operator should verify that rod faces are clean If necessary the rod faces can be cleaned by using lens tissue wetted with acetone or methanol to wipe the rod face Reverse Bias Protection Diodes are polarized with respect to electrical flow A forward biased diode readily conducts while a reverse biased diode blocks conduction If sufficient voltage is applied in the reverse direction the diode is permanently damaged Laser diodes are 2014 Northrop Grumman Systems Corporation 17 RBAT PowerPULSE User Manual Chapter 3 Module Details the single most expensive component of a RBAT module so the customer should be careful to connect diode drive current correctly In order to provide the RBAT modules with some protection against reverse biasing all RBAT modules are equipped with a reverse protection diode This is another diode located in the module which forms a circuit across the laser diode arrays in the opposite flow direction Figure 3 2 In the event of the laser diode drive current being reversed the reverse bias protection diode will act like a short circuit allowing the electricity to flow for a brief time with no resistance However the reverse bias protection diode is not able to withstand the high currents that laser diodes require The protection diode will burn out after a brief time and the
6. S gallons Ye NPT 3 8 3 8 Flow 3 8 3 8 3 8 to 1 4 FROM To Driver to 3 8 reinforced Female Switch Female reinforced 1 4 reinforced RBAT Chiller barb Hose 18 Barb Barb Hose 6 Reducer Hose 24 Interlock mpo a ar os a ex lt Figure 4 4 Chiller Assembly Drawing Closed Loop Chiller Assembly 1 Place the chiller on the floor near the RBAT PowerPULSE laser module Refer to the chiller instruction manual for power requirements settings and instructions on how to set up the chiller 2 Attach the cooling lines included with the plumbing accessory kit to the hose barb fittings on the chiller and on the RBAT PowerPULSE laser module Remember to attach the coolant filter between the chiller and the laser head The filter may be attached to the back of the chiller or to some other stable mounting point i e wall 3 When connecting the coolant flow switch make sure that it is connected to the return line of the chiller and the arrow located on the top of the switch is pointing in the direction of coolant flow 4 Connect coolant flow switch to CHILLER interlock on rear of eDrive diode driver 2014 Northrop Grumman Systems Corporation 28 RBAT PowerPULSE User Manual Chapter 4 Installation and Operation The standard plumbing arrangement for a typical closed loop chiller including hose diameters is shown in Figure 4 4 The input output coolant connections on the RBAT PowerPULSE are not polarized Either hose barb o
7. with the 0 05 Allen wrench 17 Inspect both rod ends for cleanliness If necessary clean the ends of the rod with a puff of dry nitrogen or moisture free canned air 18 Look at rod reflections with either an autocollimator or a HeNe to verify there is no rod stress When a HeNe beam is shot down an unstressed rod the reflections from the front near and far surfaces align If the reflections are separated the rod is stressed 2014 Northrop Grumman Systems Corporation 35 RBAT PowerPULSE User Manual 19 20 21 22 Chapter 5 Maintenance Re attach the beam tube supports on each end of the module Re attach the dust caps on each end of the module Leak test according to the following procedure Alternately turn on the chiller and allow coolant to flow for approximately 20 minutes Examine laser module for leaks If the module leaked first fix the leak then test again for leaks finally allow module to dry thoroughly before lasing Firing wet diodes will permanently damage them Leak Test Procedure Laser diodes are very sensitive to water damage If you have access to pressurized nitrogen and a pressure gage you can test for leaks without exposing the diodes to coolant 1 Attach a nitrogen source to one of the coolant ports on the module being tested test article and attach the termination valve to the other coolant port on the test article Close the termination valve Open the inlet valve and adjust t
8. 0 If necessary place module in a sealed bag with some form of desiccant Closed Loop Chiller The single most common cause of laser module return for repair involves customer damage More than one third of all customer damaged laser modules involve cooling problems Coolant problems almost always require the replacement of the diode arrays the single most expensive component in NG CEO laser modules Read the following section carefully to avoid damaging arrays CAUTION Do not operate module without cooling Inadequate heat dissipation will seriously damage the laser diodes and will void warranty 2014 Northrop Grumman Systems Corporation 19 RBAT PowerPULSE User Manual Chapter 3 Module Details Table 3 1 Cooling System Requirements Chiller and Cooling System Requirements Optishield Plustm distilled water coolant 10 Optishield Plustu 90 distilled water Coolant circulated at 50 psi Filter connected between chiller and inlet on module Module first in coolant loop 3 Chiller Heat Capacity Table 1 5 gt Power Consumption Table 1 3 Flow sensor connected to coolant interlock on drive electronics 1 Clean coolant is important to keeping coolant lines from clogging Untreated tap water is not an acceptable coolant and may cause damage Optishield PlusTM is the recommended coolant It is made from DI water with additives to control the pH By using DI water in the solution scale w
9. 10 d ESD CAUTION The laser diodes in the RBAT are sensitive to Electro Static Discharge ESD Never handle the RBAT module without being properly grounded through the use of properly installed and maintained grounding wrist straps or other ESD control devices Subjecting the RBAT to static shock can seriously damage or destroy the diode bars and will void the product warranty ELECTRICAL WARNING The voltages in this system can be harmful or even lethal Whenever handling or servicing the laser always disconnect the power cord to the power supplies and drivers Allow at least five 5 minutes for all electronics to discharge before touching or grounding of electrical connections 2014 Northrop Grumman Systems Corporation 11 RBAT PowerPULSE User Manual Chapter 2 Laser Safety Precautions for Safe Operation of Class IV Lasers Never look directly into the laser beam or at specular reflection even with protective eye wear on Always wear laser safety eye wear that is appropriate for the output power at the wavelengths of operation 808 nm pump light and 1064 nm fundamental 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 NG CEO system control electronics are provided with interlock inputs to preclude operation with a
10. 3 22 3 24 0 Air Temperature C 28 33 0 6 5 2 9 8 8 13 1 16 6 19 5 22 0 24 2 26 2 28 0 30 31 8 4 9 4 6 10 5 14 9 18 4 21 4 23 9 26 2 28 2 30 0 34 29 5 1 9 7 8 13 9 18 5 22 1 25 1 27 7 30 0 32 1 34 0 36 28 3 0 4 9 5 15 7 20 2 23 9 27 0 29 6 32 0 34 1 36 0 40 26 0 2 6 12 7 19 1 23 8 27 6 30 7 33 5 35 9 38 0 40 0 If required to operate a laser in conditions near to the condensation temperature take precautions to keep the RBAT PowerPULSE module dry The module should be operated inside an area that is purged with nitrogen N2 or encased in a sealed enclosure with a desiccant 2014 Northrop Grumman Systems Corporation 24 RBAT PowerPULSE User Manual Chapter 4 Installation and Operation NG CEO strongly recommends using the eDrive diode drive electronics an external DC power supply and a Polyscience chiller to operate the RBAT PowerPULSE module see Chapter for chiller capacities The following chapter contains step by step procedures detailing the installation and operation of the RBAT PowerPULSE module with these peripherals This chapter covers RBAT PowerPULSE Laser Module Assembly and Connections Closed Loop Chiller Assembly Starting the Laser Module Standby Condition Turning Off the System The purchaser is responsible for any l
11. Corporation 5 RBAT PowerPULSE User Manual Chapter 1 Introduction Figure 1 4 Radial Pump Geometry Nd YAG is the standard host material however other pump wavelengths and host materials are available The standard laser medium can be a 2mm or 3mm diameter Nd YAG rod depending on the model selected The laser diode emission wavelengths are selected specifically for pumping the host material of choice Nd YAG has an absorption peak of 808 nm Table 1 1 PowerPULSE RBAT Series Model Dimensions Model Number Rod Rod Length Length Width Height Beam Diameter mm Inches Inches Inches i Height mm Inches RBAT20 XX 2 0 63 3 07 3 04 2 30 or 2 55 1 50r1 75 RBAT24 XX 2 0 73 3 47 3 04 2 30 or 2 55 1 50r 1 75 RBAT25 XX 2 0 83 3 88 3 04 2 30 or 2 55 1 50r1 75 RBAT30 XX 3 0 63 3 07 3 04 2 30 or 2 55 1 50r 1 75 RBAT34 XX 3 0 73 3 47 3 04 2 30 or 2 55 1 5o0or 1 75 RBAT35 XX 3 0 83 3 88 3 04 2 30 or 2 55 1 50r1 75 12 55 inch height corresponds to the 1 75 beam height Specifications RBAT PowerPULSE modules are tested to exceed the following specifications The standard production test configuration consists of a 165 5 mm cavity utilizing a 0 75 mcc high reflector and a flat 40 reflective output coupler The power consumption can be calculated with the following formula 2014 Northrop Grumman Systems Corporation 6 RBAT PowerPULSE User Manual Chapter 1 Introduction Total
12. Duty Cycle Limit Use the selector knob to set the duty cycle limit to 15 4 From the main menu select Channel Setup gt Channel 1 gt More gt Set Frequency Use the selector knob to select the frequency shown on the Final Test Report 5 From the main menu select Channel Setup gt Channel 1 gt More gt Set Pulse Width Use the selector knob to select the pulse width shown on the Final Test Report 6 Press EMISSION After a few warning beeps approximately 4 second delay the eDrive applies current to the PowerPULSE module 7 Open shutter if installed 8 Using an infrared viewer or phosphor card increase the current checking for output at the laser threshold current indicated on the Final Test Report 9 Slowly adjust the current setting to the desired current level For initial use see Final Test Report Do not run the current any higher than the maximum current engraved on the cover of the laser module WARNING Do not exceed the QCW operating limits engraved on the cover of the laser module 10 If you cannot achieve desired output within 10 of previous operating current contact NG CEO Technical Service for assistance Standby Condition If you are finished using the module but want to use it again within the next hour it is best to go to standby To go to standby from a lasing condition press the EMISSION button on the eDrive Laser Controller In this condition the drive current to the laser d
13. LSE User Manual Table of Figures Figure 1 1 Exterior Components and Connections 3 Figure 1 2 Nd YAG Absorption Characteristics 4 Figure 1 3 Pump Light Absorption vs Pump Array Center Wavelength 5 Figure 1 4 Radial Pump Geometry 6 Table 1 1 PowerPULSE RBAT Series Model Dimensions 6 Table 1 2 PowerPULSE RBAT Series Model Specifications 7 Table 1 3 PowerPULSE RBAT General Specifications 8 Table 1 4 Recommended Chiller Models 9 Figure 2 1 Standard Safety Warning Sign 13 Figure 2 2 Radiation Control Drawing 14 Figure 2 3 Warning Labels 14 Figure 3 1 RBAT with Power Lugs and Dog Tag 17 Figure 3 2 Reverse Bias Protection Diode Circuit 18 Table 3 1 Cooling System Requirements 20 Table 3 2 Avoid with Chillers 20 Figure 3 3 Constant Dew Point Lines for Ambient Temperature and Relative Humidity 23 Table 3 3 Table of Condensation at Ambient Temperature and Relative Humidity 24 Figure 4 1 Connection Diagram 27 Figure 4 2 2U eDrive Front Panel 27 Figure 4 3 2U eDrive Rear Panel 28 Figure 4 4 Chiller Assembly Drawing 28 Figure 5 1 Rod Replacement Drawing 34 2014 Northrop Grumman Systems Corporation xi RBAT PowerPULSE User Manual Figure 5 2 Nitrogen Leak Test Layout 2014 Northrop Grumman Systems Corporation xii 36 RBAT PowerPULSE User Manual Chapter 1 Introduction This introduction provides the following information Theory of Operation Temperature Tuning of Laser Diodes RBAT PowerPULSE Description Specifications
14. 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 i RBAT PowerPULSE User Manual 2014 Northrop Grumman Systems Corporation i Safety Information Product End of Life Handling NG CEO is committed to protecting the environment In accordance with the Waste Electrical and Electronic Equipment directive WEEE and Restriction of Hazardous Substances in the European Union RoHS EU directives NG CEO accepts the return of our products for disposal When you are ready to reclaim the instrument you must properly transfer it according to local regulations concerning WEEE equipment Contact Gs NG CEO or your local distributor for shipping instructions Please package the products as directed for a return for repair 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 for the Administration on Pollution Control of Electronic Information Products No 39 Order of the Ministry of Information Industry of the Peoples Republic of China NG CEO includes the following translation about our laser modules PEARHNE KTR REBAR ARR Er Northrop Grumman Cutting Edge Optronics tme 20 Point West Blvd St Charies M
15. O 63301 USA EALE BF Laser Modules RBATXX XXXXXXX XXX XXXX ARASH RERRAR ETRELERER Mme shani ep a ee Sf 5 Behe Pt Hg Cd CrVI PBB _ PBDE Mh Bis BIRD oO X X Roe W 44 x o O 3 i Se x O HINE _LI FrALfF Oo x xX X HEM oO re eh O a Br 9 o 6 x X Bem o oO e O _ BINA o X o O O CHE is x 2 ie _0 ath SRW ce o o o 0 ARABE ROBE MA AYR AP SE SJ T 11963 2006 MEMRMERETF Xx X RRRABASORS DS EAEAN Hyd Ho MH SJ T 11363 2006 MEHRRER 2014 Northrop Grumman Systems Corporation iv RBAT PowerPULSE User Manual Conventions The following conventions appear in this manual This icon denotes a caution or a warning which advise you of precautions to take to avoid injury data loss or a system crash Initial Capped The first letter in uppercase refers to menu options e g Phase Delay Pulse Width CAPS Front panel buttons knobs and connectors appear in all uppercase letters e g MENU CURRENT gt The symbol separates a sequence of button pushes e g MENU gt CHANNEL SETUP PULSE WIDTH means that you push the MENU button then push the CHANNEL SETUP soft key and then push the PULSE WIDTH soft key italic Italic text denotes references to other resources that may be helpful to you or to bring attention to important information This icon denotes a note which alerts you to important information l Power Switch Position Symbols O I
16. On O Off The following conventions may appear on the product DANGER An injury hazard immediately accessible as you read the marking WARNING A hazard not immediately accessible as you read the marking CAUTION A hazard to property including the product ESD Handle Appropriately 2014 Northrop Grumman Systems Corporation v RBAT PowerPULSE User Manual Laser Emission Use caution Shock Hazard Use caution Caution Risk of danger Refer to manual Chassis Ground PPP 2014 Northrop Grumman Systems Corporation vi RBAT PowerPULSE User Manual General Safety Summary The RBAT PowerPULSE module emits laser radiation that can permanently damage eyes and skin ignite fires and vaporize substances The Laser Safety section Chapter 2 contains information and guidance about these hazards To minimize the risk of injury or expensive repairs carefully follow these instructions Do not open the factory packaging before carefully reading this complete operation and maintenance 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 Service section is intended to help guide you to the source of problems Do not attempt repairs while the unit is under warranty instead r
17. Power Consumption Bars x Diode Voltage per Bar x Duty Cycle x Operating Current Common PowerPULSE power consumptions are listed in Table 1 2 below For models not listed please contact NG CEO to determine the power consumption Table 1 2 PowerPULSE RBAT Series Model Specifications Model Number ASM per Diode Diode Bias Power Power Power Module Bars per Voltage 3 Consumption Consumption Consumption Module 50 Watt 100 Watt 200 Watt bar bar bar RBAT20 YPX 9 9 Y 19 8 Y 208 Y 297 Y 520 Y RBAT24 YPX 12 12 Y 26 4 Y 277 Y 396 Y 693 Y RBAT25 YPX 15 15 Y 33 0 Y 347 Y 495 Y 866 Y RBAT30 YPX 9 9 Y 19 8 Y 208 Y 297 Y 520 Y RBAT34 YPX 12 12 Y 26 4 Y 277 Y 396 Y 693 Y RBAT35 YPX 15 15 Y 33 0 Y 347 Y 495 Y 866 Y Specifications subject to change without notice The Y in the model number represents the number of bars per array sub module The X in the model number represents the wattage per bar 5 50W 1 100W 200 200W 3 Assumes 2 2V per bar Depending on the driver controller used the power supply voltage may be approximately 30 volts higher than shown in the table At end of life operating current is 70A for 50 W bars 100A for 100W bars and 175A for 200W bars 5 Assumes 15 duty factor 2014 Northrop Grumman Systems Corporation 7 RBAT PowerPULSE User Manual Chapter 1 Introduction Table 1 3 PowerPULSE RBAT Ge
18. User Manual RBAT PowerPULSE Diode Pumped Nd YAG Rod Laser Modules RBAT2X RBAT3X CEO UMAN 0064 NORTHROP GRUMMAN SEPTEMBER 2014 Worldwide Technical Support and Product Information http www northropgrumman com Business Ventures CEO Pages Service aspx http www ngceoservice com Knowledge Center Hours 8 00 a m to 5 00 p m Central time Technical Support 636 916 4900 follow prompts for department directory Email ngceoservice ngc com Cutting Edge Optronics Headquarters 20 Point West Blvd St Charles MO 63301 USA Sales Support 636 916 4900 follow prompts for department directory 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 website for a list of offices 2014 Cutting Edge Optronics a strategic business unit of Northrop Grumman Systems Corporation All rights reserved 2014 Northrop Grumman Systems Corporation ji RBAT PowerPULSE User Manual Important Information Copyright Under the copyright laws this publication may not be reproduced or transmitted in any form electronic or mechanical including photocopying recording storing in an information retrieval system or translating in whole or in part without the prior written consent of NG CEO Trademarks eDrive and PowerPulse are registered trademarks of Northrop Grumman Corporation Patents
19. ails Operating the Chiller WARNING Do not operate module without cooling Inadequate heat dissipation will seriously damage the laser diodes and will void warranty If you notice coolant in the immediate vicinity of the module shut the laser system down immediately Check to see if the coolant is coming from the module If so return the module for repair If not repair the source of the leak and allow the module to dry thoroughly before resuming operation The RBAT PowerPULSE module has a coolant loop to prevent thermal damage to the laser diodes The diodes should be kept at approximately 20 C to 35 C See the final test report for optimum temperature and flow rate settings NOTE The chiller must run continuously to prevent biological growth or corrosion If the chiller is to be shut down for more than 1 week the coolant loop should be drained flushed with 3 hydrogen peroxide solution and purged with oil free dry filtered air or N See Chapter 5 Maintenance for more detail Operating the laser diodes for even a short period of time less than 1 second without coolant will cause permanent damage To help prevent this all NG 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 For this to function properly a flow sensor must be used in the coolant loop When setting up the laser module for the first time NG CEO recom
20. be done in one degree Celsius increments Look for an increase in optical output power on an external power meter Wait a few minutes between each adjustment allowing the chiller to stabilize Continue until you obtain the maximum possible power Cleaning the Chiller The cooling fluid should run for a maximum period of 1 month after which the system should be drained cleaned and refilled with clean coolant The filter on the closed loop system should be monitored weekly The system should also be drained cleaned and refilled with clean coolant if any discoloration of the filter occurs A video of cleaning a Polyscience 6000 series chiller can be found on NG CEO s Knowledge Center at http www ngceoservice com Level 1 PA 016 QTGP Patara Level 1 Maintenance Video Chapter 17 Chiller Maintenance Hydrogen Peroxide Flush Chemicals and Supplies Needed 3 Hydrogen Peroxide solution sufficient to fill the system Optishield Plus and distilled water solution 10 Optishield Plus 90 distilled water Distilled water sufficient to fill the system Two replacement particle filters NG CEO part 37023165 Cleaning Procedure 1 Drain chiller and clean any residue or contamination in the reservoir with the use of a bottle brush or alcohol wipes 2 Using a filter housing wrench dismantle the particle filter housing Empty the coolant trapped in the filter housing into a container for later disposal 3 Dispose o
21. d loop chiller For maximum efficiency the diode output wavelength must match the laser medium absorption characteristics see Figure 1 2 The output spectrum of a conventional pump source for Nd YAG operation the xenon arc lamp and 808 nm diode array are also shown 2014 Northrop Grumman Systems Corporation 3 RBAT PowerPULSE User Manual Chapter 1 Introduction Laser Diode Pump Wavelength 808 nm Xenon flash tube 1700 A cm E Absorption spectrum of Nd YAG 300 K Wavelength ym Figure 1 2 Nd YAG Absorption Characteristics A single GaAlAs laser diode bar has a 2 nm FWHM distribution of output wavelengths However the process used in the manufacture of GaAlAs laser diodes results in a peak output wavelength for each diode that fits within a 10 nm distribution of wavelengths from 800 810 nm To match the diode output to an absorption peak of the laser medium diodes are selected with similar peak output wavelengths within the manufacturing range Temperature tuning is possible because GaAlAs diode characteristics are such that 0 25 nm of wavelength shift occurs for every 1 C change in temperature of the diode junction Cooling shortens the wavelength and heating lengthens it Figure 1 3 shows the percentage of pump light of different wavelengths absorbed by two passes through a 6 35 mm diameter rod of 0 6 doped Nd YAG In NG CEO modules the laser diode center wavelength under normal operating conditions is near the abso
22. drive current will be sent through the laser diodes in reverse Laser Diodes Reverse Protection Diode Terminals Figure 3 2 Reverse Bias Protection Diode Circuit Customers are recommended to configure their drive electronics for use with NG CEOs reverse bias protection diodes The driver should be able to detect the shorted condition because with a short across the array the full power supply voltage will suddenly be impressed across the driver control FETs For drivers which have a fixed power supply voltage a much larger voltage across the drive FETs will increase the heat load and cause a dramatic rise in their temperature For drivers which have the capability to supply the voltage to produce the necessary current a sudden decrease in output voltage should cause a corresponding large decrease in the voltage required internally within the driver which could be detected and reported If any of the conditions are detected the driver should suspend diode drive current and send the operator an error message 2014 Northrop Grumman Systems Corporation 18 RBAT PowerPULSE User Manual Chapter 3 Module Details Storing the RBAT PowerPULSE Proper storage of the RBAT PowerPULSE module involves three steps 1 Remove all coolant from module by blowing dry air through it for 20 minutes 2 Place a shorting connector across the power lugs shown in Figure 3 1 Store module in a clean dry atmosphere relative humidity less than 3
23. eport all problems to NG CEO for warranty repair Use the form in Appendix A Customer Service to describe issues with the module We also suggest that you record information about the module such as power settings time and date 2014 Northrop Grumman Systems Corporation vii RBAT PowerPULSE User Manual About this Manual This manual describes the installation operation and service of the RBAT PowerPULSE module The manual consists of the following chapters Chapter 1 Introduction provides a theory of operation description of the module and specifications Chapter 2 Laser Safety describes proper safety procedures you should understand before operating the module Chapter 3 Module Details provides information about unpacking storing and proper environmental conditions for operation Chapter 4 Installation and Operation discusses how to setup your module and powering on your system for the first time Chapter 5 Maintenance provides information on proper maintenance of your module Chapter 6 Service provides resources to help fix problems with the RBAT PowerPULSE module Appendix A Customer Service provides information to expedite any service request before contacting NG CEO Appendix B System International Units identifies commonly used units of measurement found in this manual Appendix C Acronyms provides a list of commonly used abbreviations and their descriptions used throughout this manual 2014 No
24. f it does not adjust the bypass valve on the rear of the chiller Minimum coolant flow is one gallon per minute See final test report for optimum flow rate NOTE Chiller flow rate calibration may be required Please refer to the chiller user manual for instructions on calibration A video of flow calibration of a Polyscience 6000 s series chiller can be found on NG CEO s Knowledge Center at m http www ngceoservice com Level 1 PA 016 QTGP Patara Level 1 Maintenance Video Chapter 19 Flow Rate Calibration 9 Set the temperature located on the front panel of the chiller to the optimum temperature listed on the final test report 2014 Northrop Grumman Systems Corporation 29 RBAT PowerPULSE User Manual Chapter 4 Installation and Operation Starting the Laser Module Pre start Conditions 1 Wear laser safety goggles which protect user from 1064 nm fundamental and 808 nm radiation Position the RBAT PowerPULSE module in a laser cavity such the output will be directed toward a safe target 3 Verify that the system is correctly assembled Verify that the rod faces are clean and not capped or covered 5 Verify that the filter on the closed loop chiller is connected to the inlet hose 6 barb Switch the chiller to the ON position Verify coolant flow from chiller WARNING Do not operate coolant system below air condensation temperature dew point at laser head Condensation on the diode arrays can seriously da
25. f the expired particle filter and clean any residue or contamination from the inside of the filter housing Install a new filter in the housing 2014 Northrop Grumman Systems Corporation 38 RBAT PowerPULSE User Manual Chapter 5 Maintenance 4 Refill with distilled water and circulate for 5 minutes Drain system completely as detailed in steps 1 and 2 6 Fill the chiller with a 3 solution of Hydrogen Peroxide Care should be taken to ensure that the mixture completely fills to the top of the reservoir to ensure all wetted surface areas of the chillers are cleaned Cycle the chiller on and off Top off the reservoir as necessary to ensure it is full of the cleaning solution Ensure that the cap of the chiller reservoir is loose or remove it completely to allow gas to escape from the system 7 Circulate the cleaning solution through the system including the laser module for 40 minutes Drain the cleaning solution mixture from the chiller as detailed in steps 1 and 2 9 Refill and circulate distilled water for 5 minutes and drain Ensure that the cap of the chiller reservoir is loose or remove it completely to allow gas to escape from the system 10 Drain the chiller and dispose of the filter 11 Disconnect the chiller from the laser module and blow out water from the laser module coolant loop prior to refilling the chiller coolant reservoir 12 Reconnect the laser module coolant loop 13 Install new 5 micron filter into hous
26. he regulator to obtain 80 psi on the pressure gauge Close the inlet valve Wait Return after 30 minutes and record pressure on the gauge Subtract this pressure from starting pressure of 80 psi to get the pressure drop over 30 minutes Pass Fail requirements if the pressure drop is greater than 3 psi FAIL if the pressure drop is less than 3 psi PASS lermination Test Article Water Ports Nitrogen Source Figure 5 2 Nitrogen Leak Test Layout 2014 Northrop Grumman Systems Corporation 36 RBAT PowerPULSE User Manual Chapter 5 Maintenance Rod Cleaning CAUTION Ensure gloves or finger cots are worn during this procedure and that it is carried out in a clean environment preferably under a laminar flow hood 1 First blow optical surface with dry nitrogen 2 Then use either hemostats and lens tissue or a tightly wrapped cotton tipped applicator lightly wetted with acetone or methanol to wipe the rod face Inspect the rod for cleanliness 4 Repeat if necessary Extend Lifetime of Laser Diodes The specification for the RBAT PowerPULSE output is provided in the Final Test Report delivered with the module As the diodes age an increase in current pulse width or frequency may be required to maintain power and beam quality so the diodes can continue to be used Once the maximum peak current or duty cycle is reached consider replacing diodes or upgrade the laser Please contact NG CEO for detailed informa
27. ill not form in the cooling loop It contains biocide to prevent algae growth and corrosion inhibitors to protect yellow metals and aluminum Optishield Plus is available from Opti Temp Inc http Awww optishield net 3 The filter should be capable of removing particles 5 um or larger The filter should be changed at a minimum of every month The filter should be changed more frequently if the pH drops below 8 or the filter or coolant show any discoloration Every month or whenever the filter is changed the coolant should be drained The chiller should then be cleaned Finally clean coolant should be circulated 5 This ensures the cleanest coolest coolant passes through the diodes the most expensive component of most lasers When not using NG CEO drive electronics verify that flow sensor interrupts current to diodes less than 1second after a low flow condition occurs Table 3 2 Avoid with Chillers Avoid with Chillers Untreated De ionized water Iron or aluminum parts in plumbing loop Operation below air condensation temperature 1 NG CEO recommends chiller coolant have a resistivity between 300 and 700 KQ Deionized water can be used if the resistivity is closely monitored and the coolant loop does not have iron or aluminum parts The pH of the DI water should be controlled between 7 0 and 8 0 2014 Northrop Grumman Systems Corporation 20 RBAT PowerPULSE User Manual Chapter 3 Module Det
28. ing 14 Record cleaning date on sticker with a one month reminder to drain amp clean the system Affix sticker to chiller or cabinet 15 Refill the chiller reservoir with Optishield Plus and distilled water solution following the manufacturer s directions Run for 30 minutes with the cap loose to allow gas to escape from the system 16 Secure the reservoir cap 17 Chiller ready to use High Voltage DC Power Supply Maintenance Consult power supply manual for regularly scheduled maintenance and calibration details WARNING Hazardous voltages are present during normal operation Before removing the cover the power source should be disconnected and a period of 20 minutes allowed for the discharge of stored capacitance Use a voltmeter to verify all electronics are discharged before touching or grounding of electrical connections 2014 Northrop Grumman Systems Corporation 39 RBAT PowerPULSE User Manual Chapter 6 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 our superior service by providing dependable instruments and if the need arises service facilities that ca
29. iode shuts off but the closed loop chiller maintains the optimum diode temperature To resume lasing press the EMISSION button on the eDrive laser controller Again an audible warning will sound for approximately 4 seconds prior to firing the PowerPULSE module 2014 Northrop Grumman Systems Corporation 31 RBAT PowerPULSE User Manual Chapter 4 Installation and Operation Turning Off the System n 1 Close shutter if installed 2 Decrease the current to 10A in 10A decrements 3 4 Press the POWER button of the eDrive located on the front panel Hold down Press the EMISSION button to turn off drive current for approximately 5 seconds until the eDrive shuts down Turn the key switch on the eDrive to the OFF position Switch the main AC power switch on the optional external power supply located on the front panel to the OFF position Allow chiller to run for 2 minutes Switch the closed loop chiller to the OFF position Remove the key Do not leave the laser accessible to people who are untrained in laser safety or operation 2014 Northrop Grumman Systems Corporation 32 RBAT PowerPULSE User Manual Chapter 5 Maintenance The chapter contains information in these sections Rod Removal and Replacement Leak Test Procedure Rod Cleaning Extend Lifetime of Laser Diodes Increasing the Operating Current Pulse Width or FrequencyCleaning the Chiller 2014 Northrop Grumman Systems Corporatio
30. mage the laser head and may void warranty Consult NG CEO Technical Service if you have any questions Turning the Laser Module On 1 2 Verify coolant temperature and flow rate are correct Toggle the power switch on the external power supply to ON position Set the voltage and current for the external power supply per the Final Test Report supplied with the module Toggle the AC power switch on rear of the eDrive to the ON position 5 Turn the Key switch to the ON position Before applying current to diodes shut off chiller to verify that the Flow Interlock Fault comes on Restart the chiller Select Clear and verify the error display is no longer present Powering the RBAT PowerPULSE Module 1 From eDrive main menu select Channel Setup gt Channel 1 gt Set Current Limit Use the selection knob to set your maximum current amplitude to a value considered safe for the intended module The eDrive will not allow the current amplitude to be set higher than the limit RBAT PowerPULSE modules should never be run with more than the maximum operating conditions engraved on the module 2014 Northrop Grumman Systems Corporation 30 RBAT PowerPULSE User Manual Chapter 4 Installation and Operation 2 From the main menu select Channel Setup gt Channel 1 gt Set Current Use the selector knob to select a low current level of approximately 10A 3 From the main menu select Channel Setup gt Channel 1 gt More gt Set
31. may have to push from the opposite end 6 When the laser rod unseats carefully pull it completely out of the module from one end 7 Remove the rod O rings from both ends and discard CAUTION Use extreme caution during the remaining steps of this procedure to ensure that the rod faces and or coatings are not damaged Never use a tool that can scratch the rod on the O rings Unwrap the new rod and inspect the end faces 9 Obtain two 76 60 Viton O rings if using a 2mm rod or two 70 98SS Viton O rings if using a 3mm rod These O rings are supplied with the module 10 Place one of the corresponding O rings over one end of the rod Position the O ring approximately 10mm from the end of the rod 11 While inserting the rod in one end of the module look thru the opposite end to help guide the laser rod through the center of the opening The rod must be perfectly centered to avoid damage 12 On the end of the module with the rod O ring place one of the retainer caps onto the endplate and start the three 2 56 screws with lock and flat washers using a 0 05 Allen wrench 13 Place the second O ring over the opposite end of the rod 14 Place the remaining cap onto the second endplate and start the three 2 56 screws with lock and flat washers 15 Position the rod equidistant from each end of the pump module using gloved fingers or the soft end of a cotton swab soaked in acetone or methanol 16 Tighten the retainer caps
32. mends testing the flow interlock before firing This can be accomplished by setting the drive current to a very low level 1 A then attempting to fire the laser with the chiller off In case interlock does not function correctly be prepared to manually turn off laser By testing the interlock with a minimal current the risk to the laser diodes is minimized WARNING Do not operate the coolant system below air condensation temperature dew point at the laser head Condensation on the diode arrays can seriously damage the laser head and will void the warranty Consult NG CEO technical service if you have any questions 2014 Northrop Grumman Systems Corporation 21 RBAT PowerPULSE User Manual Chapter 3 Module Details Air Condensation Temperature The air condensation temperature or dew point is the highest surface temperature that allows water to form from the ambient water vapor The dew point is dependent on the surrounding air 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 Condensation Temperature _ 237 7 xa T RA a T RH 17 27 a T RH f 237 7 T d 17 27 xT RH In 100 where T is the ambient air temperature in degrees Celsius 0 lt T lt 60 RH is the relative humidi
33. n 33 RBAT PowerPULSE User Manual Chapter 5 Maintenance Rod Removal and Replacement The only user serviceable part in the RBAT PowerPULSE module is the Nd YAG rod which can be replaced by the user YAG rods rarely break frequent replacement may be a sign of another problem in the RBAT PowerPULSE module Contact NG CEO if you have any further questions CAUTION The module is susceptible to damage due to electro static discharge ESD Always use proper ESD control devices when handling the module CAUTION Ensure gloves or finger cots are worn during this procedure and that it is carried out in a clean environment preferably under a laminar flow hood O Ring Beam Tube Support Retainer Cap Retainer Cap Beam Tube Support Figure 5 1 Rod Replacement Drawing A video on Rod Replacement is available on the NG CEO website at http www ngceoservice com RBA_Laser_Modules 2014 Northrop Grumman Systems Corporation 34 RBAT PowerPULSE User Manual Chapter 5 Maintenance 1 Purge the laser module with dry air for 5 minutes 2 Remove the dust caps and beam tube supports from the retainer caps These are just threaded on 3 Remove the retainer caps by removing the six 2 56 button head screws with a 0 05 Allen wrench 4 Remove the retainers cap by rotating in a counter clock wise motion and pulling away 5 Unseat the laser rod by carefully pressing on one end If the rod does not easily unseat you
34. n open safety door NOTE when multiple interlocks are used they must be connected in SERIES for proper function Restrict access to laser areas to those who have been instructed in the necessary safety precautions Enclose beam paths wherever possible Set up experiments so the laser beam is below eye level Work in an area that is well lit to avoid dilation of pupils Set up a target for the beam Set up shields to prevent reflected beams from escaping the laser operation area The Q switched output power of the laser emits extremely high peak optical powers powers that can severely damage a wide array of optical components and detectors Know the limits of your components before exposing them to the Q switched beam View an infrared laser beam with a protected image converter at an oblique angle reflecting from a diffuse surface Do not use phosphorus cards in the Q switched beam 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 2014 Northrop Grumman Systems Corporation 12 RBAT PowerPULSE User Manual Chapter 2 Laser Safety INVISIBLE LASER RADIATION AVOID EYE OR SKIN EXPOSURE TO DIRECT OR SCATTERED RADIATION Wavelength Power 790 820nm 10W 1064nm 150W
35. n restore your instrument to peak performance without delay When calling for service in the U S dial 636 916 4900 To phone for service in other countries contact your sales agent This chapter provides reference to types of customer service needs Contact Customer Service Return the Instrument for Repair 2014 Northrop Grumman Systems Corporation 40 RBAT PowerPULSE User Manual Chapter 6 Service Contact Customer Service To expedite your service needs please complete the questionnaire in Appendix A Customer Service before you contact NG CEO Customer Service Complete the questionnaire with as much detail as possible and retain a copy for your records E mail or fax the form to NG CEO refer to the second page of this manual for contact information and notify your customer service representative that it has been sent Return the Instrument for Repair A return merchandise authorization RMA is required prior to shipping any instruments to NG CEO Contact NG CEO or your local distributor for RMA and shipping instructions CAUTION Failure to obtain proper shipping instructions may result in damage to the instrument Use the packing boxes supplied by NG CEO to ship your instruments If shipping boxes have been lost or destroyed replacements are available for a nominal charge from NG CEO Remove all coolant from module by blowing dry air through it for 20 minutes prior to packaging for shipment Place a shorti
36. n the RBAT PowerPULSE laser module can be arbitrarily chosen as the coolant inlet Coolant flow direction is not important as long as the coolant passes through the filter before entering the RBAT PowerPULSE laser module CAUTION Do not use de ionized DI water in the closed loop chiller based system If you must use DI water monitor the resistivity less than 1 0 MQ closely and avoid iron or aluminum parts in the coolant loop 5 Fill the chiller reservoir and filter housing manually with coolant 10 Optishield Plusru 90 distilled water Optishield Plus is made from DI water with additives to control the pH By using DI water in the solution scale will not form in the cooling loop It contains biocide to prevent algae growth and corrosion inhibitors CAUTION Do not allow chiller to fill the filter housing as air can become trapped within the system 6 Power on the chiller 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 the laser module Air is trapped in the lines if coolant 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 8 Verify the pressure gauge located on the front panel of the chiller reads approximately 50 psi I
37. neral Specifications All PowerPULSE RBAT Series Models err Type Pulsed Diode Pumped Nd YAG Rod Dopant Level Application Dependent Output Wavelength 1064 nm Pulse Repetition Rate See Final Test Report Duty Cycle Max 15 Operating Current See Final Test Report Cooling Closed Loop Recycling Coolant Coolant Flow gt 1 0 GPM Coolant Pressure 50 PSI Operating Temperature 20 30 C non condensing NG CEO recommends Optishield Plus distilled water coolant 10 Optishield Plustu 90 distilled water 2NG CEO modules are leak tested to 80 psi with Nitrogen gas NG CEO recommends 50 psi as displayed on the chiller for actual operation SYLF c onfigurations are available by special request External DC Power Supply An external DC power supply is required to provide the DC voltage to run the diode arrays in a PowerPULSE RBAT module NG CEO will recommend a power supply based on the customer s application Closed Loop Re circulating Chiller Coolant flow direction is not polarized on the PowerPULSE RBAT laser module Be sure to connect the coolant filter for the selected chiller on the Inlet connection so only clean coolant from the filter flows through the laser module Dirty coolant deposits dirt on the laser rod which results in low output power The module coolant loop is designed for an operating pressure of 50 psi The selected chiller must have a heat capacity of greater than the po
38. ng connector across the power lugs Place module in a sealed bag inside shipping container Place some form of desiccant in bag with module WARNING Damage from residual coolant due to condensation or expansion can be catastrophic to the diode arrays or laser rod if not dealt with properly Such damage is excluded from warranty coverage 2014 Northrop Grumman Systems Corporation 41 RBAT PowerPULSE User Manual Appendix A Customer Service This form has been provided to encourage you to tell us about any difficulties you may have experienced while using your Northrop Grumman Cutting Edge Optronics instruments or user manuals Call or write our customer service department to bring attention to problems that you may not have personally experienced We are always interested in improving our products and manuals and we appreciate all suggestions Date Name Company or Institution Department Address RBAT Model Number Serial Number Chiller Model Number Serial Number eDrive Model Number Serial Number RBAT Manufacture Date RBAT Shot Count from electronics 2014 Northrop Grumman Systems Corporation 42 RBAT PowerPULSE User Manual Questions What is the coolant flow rate GPM Appendix A Customer Service What is the set temperature on the chiller C What is the coolant pressure on chiller PSI What are the set current and actual current from eDrive A
39. oss and injury during installation and use of the RBAT PowerPULSE module NG CEO recommends that a qualified service technician install and maintain the RBAT PowerPULSE module If you intend to service the RBAT PowerPULSE module yourself please follow the following procedures 2014 Northrop Grumman Systems Corporation 25 RBAT PowerPULSE User Manual Chapter 4 Installation and Operation RBAT PowerPULSE Laser Module Assembly and Connections CAUTION The module is susceptible to damage due to electro static discharge ESD Always use proper ESD control devices when handling the module See Module Connection Diagram Figure 4 1 1 Check to make sure the AC power switch located on the rear panel of the eDrive Laser Diode Controller is in the OFF position Use two ring tongue terminals to connect the power lugs on the base of the RBAT PowerPULSE module to the Array Drive Output connector located on the rear of the eDrive Connect the lab door interlock switch or other interlock used to the Interlock connector on the rear of the eDrive If multiple interlocks are needed be sure all interlocks are connected in SERIES to this port If no remote interlocks are used short the connection to allow for normal laser operation Check to make sure the AC power switch located on the front of the external power supply is in the OFF O position Then connect the output of the supply to the input power lugs of the eDrive located at the u
40. peration of laser and or adjustment of control electronics do not require exposure to laser radiation 2014 Northrop Grumman Systems Corporation 14 RBAT PowerPULSE User Manual Chapter 3 Module Details This chapter describes basic operation of your RBAT PowerPULSE module This chapter discusses Unpacking the Module RBAT PowerPULSE Module Storing the RBAT PowerPULSE Closed Loop Chiller 2014 Northrop Grumman Systems Corporation 15 RBAT PowerPULSE User Manual Chapter 3 Module Details Unpacking the Module The RBAT PowerPULSE module was carefully packed for shipment If the carton appears to have been damaged in transit have the shipper s agent present when you unpack CAUTION The module is susceptible to damage due to electro static discharge ESD Always use proper ESD control devices when handling the module CAUTION Do not open sealed package until package has normalized to room temperature Condensation can seriously damage the diode arrays in the laser module and may void warranty Inspect the unit as you unpack it looking for dents scratches or other evidence of damage If you discover any damage immediately file a claim against the carrier and notify your NG CEO representative NG 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
41. pper left of the rear panel Verify the eDrive has clear space in rear and on each side of unit to allow proper air flow Plug the eDrive and external power supply cords into the appropriate facility power The eDrive diode driver is equipped with universal power circuitry accepting voltages ranging from 100 240 VAC and a frequency range of 47 63 Hz 2014 Northrop Grumman Systems Corporation 26 RBAT PowerPULSE User Manual Chapter 4 Installation and Operation Host Computer Used only if optonal external computer control s implemented RS XXX or CAN BUS External Power sie He ci ai Laser Supply anus Module i Chiller Figure 4 1 Connection Diagram 4x40 Selector r Shutter Emission LCD Knob Indicators S Ce oH amp D Ooo O Switch Ke Keys Figure 4 2 2U eDrive Front Panel 2014 Northrop Grumman Systems Corporation 27 RBAT PowerPULSE User Manual Chapter 4 Installation and Operation Power Supply Array Drive AC Power Chiller Remote Input Terminals Output Terminals Input Interlock interlock 50460 Hy hax as 85 d Dy Figure 4 3 2U eDrive Rear Panel 4 NPT 3 8 34 NPT 34 NPT 3 8 3 8 to 1 4 To to 3 8 reinforced to 3 8 to 3 8 reinforced 1 4 reinforced CHILLER barb Hose 18 barb barb Hose 6 Reducer Hose 24 RSAT OUTLET dpo mnp aan J INLET COOLANT OPTISHIELD Plus CAPACITY 1 1 U
42. return the unit for service the specially designed carton assures adequate protection A manual and a final test report should accompany each unit shipped 2014 Northrop Grumman Systems Corporation 16 RBAT PowerPULSE User Manual Chapter 3 Module Details RBAT PowerPULSE Module The RBAT module connects to diode drive current via positive and negative power lugs which attach to two ring tongue terminals thread size 8 32 UNC 2B see Figure 3 1 The lugs are labeled positive and negative The required voltage bias for the RBAT PowerPULSE diodes are listed in Table 1 3 in Chapter 1 Introduction The RBAT PowerPULSE module was shipped with a final test report that shows the performance of the module at nominal operating conditions The operating limits are engraved on both the cover and a dog tag attached to the module as shown in Figure 3 1 QCW OPERATING LIMITS MODEL NO RBATXX XXXXXXX XXX XXXX SERIAL NO XXXXXX CURRENT XXX A VOLTAGE XXX V COOLING TEMP XX XX C PULSEWIDTH XXX us FREQUENCY Set Not to Exceed Duty Cycle Limit DUTY CYCLE XXX Dog Tag Detail Power Lugs Figure 3 1 RBAT with Power Lugs and Dog Tag RBAT PowerPULSE module output is a result of the optical pump power from the pulsed laser diodes If laser diode current optical power is lowered the output from the RBAT PowerPULSE module will also decrease The diode arrays within the RBAT PowerPULSE module are aligned and sealed at the factory
43. rmation Caution amp Warning Statements Precautions for Safe Operation of Class IV Lasers Center for Devices and Radiological Health CDRH OEM Product Safety Device Checklist 2014 Northrop Grumman Systems Corporation 10 RBAT PowerPULSE User Manual Chapter 2 Laser Safety Caution amp Warning Statements PrP gt WARNING The NG CEO RBAT component when used as a laser oscillator 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 When energized a large amount of high power invisible laser radiation is emitted from the laser module Follow 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 WARNING 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
44. rption peak of the laser medium The operating temperature of closed loop chiller is carefully chosen to shift the diode temperature so that the wavelength matches the absorption peak The final test report included with each module indicates the optimum operation temperature for that module 2014 Northrop Grumman Systems Corporation 4 RBAT PowerPULSE User Manual Chapter 1 Introduction Modeled Pump Light Absorption vs Pump Array Center Wavelength Spectral Width ot Pump Array 2 nm iwm nt on fem 6 35 mm Giamoter rod 0 6 NA YAG 2 pass absorption Net Pump Light Absorption 790 795 800 805 810 815 B20 Pump Array Center Wavelength nm Figure 1 3 Pump Light Absorption vs Pump Array Center Wavelength RBAT PowerPULSE Description The RBAT PowerPULSE is a completely maintenance free and factory sealed unit that is about 1 2 the size of a standard arc lamp pump chamber It employs a pumping scheme utilizing a radial array of close coupled diode laser arrays for efficient direct side pumping of the solid state host material This pump geometry results in excellent gain uniformity and lensing performance see Figure 1 3 In order to optically pump the length of the rod arrays are three four or five array sub modules ASM long In the Pulsed RBAT module NG CEO uses a stack of either 1 2 3 or 4 bars on each ASM The available peak power of each diode bar is 50W 100W or 200W 2014 Northrop Grumman Systems
45. rthrop Grumman Systems Corporation viii RBAT PowerPULSE User Manual Table of Contents Chapter 1 Introduction Theory of Operation Temperature Tuning of Laser Diodes RBAT PowerPULSE Description Specifications External DC Power Supply Closed Loop Re circulating Chiller Chapter 2 Laser Safety Caution amp Warning Statements Precautions for Safe Operation of Class IV Lasers Center for Devices and Radiological Health CDRH OEM Product Safety Device Checklist Chapter 3 Module Details Unpacking the Module RBAT PowerPULSE Module Storing the RBAT PowerPULSE Closed Loop Chiller Chapter 4 Installation and Operation RBAT PowerPULSE Laser Module Assembly and Connections Closed Loop Chiller Assembly Starting the Laser Module Standby Condition 25 26 28 30 31 2014 Northrop Grumman Systems Corporation ix RBAT PowerPULSE User Manual Turning Off the System Chapter 5 Maintenance Rod Removal and Replacement Leak Test Procedure Rod Cleaning Extend Lifetime of Laser Diodes Increasing the Operating Current Pulse Width or Frequency Cleaning the Chiller High Voltage DC Power Supply Maintenance Chapter 6 Service Contact Customer Service Return the Instrument for Repair Appendix A Customer Service Questions Appendix B System International Units Appendix C Acronyms 32 33 34 36 37 37 37 38 39 40 41 41 42 43 45 46 2014 Northrop Grumman Systems Corporation x RBAT PowerPU
46. t Manufacturer Occupational Safety and Health Administration Pulse Repetition Frequency Pounds per Square Inch Second Harmonic Generator Thermo Electric Cooler Transistor Transistor Logic United States of America Volts Alternating Current 47 RBAT PowerPULSE User Manual
47. tion Increasing the Operating Current Pulse Width or Frequency CAUTION Increasing the operating current pulse width or frequency before it becomes necessary can severely shorten diode lifetime Before increasing the operating current pulse width or frequency ensure the coolant temperature is at the correct set point all optical surfaces are clean the chiller coolant and filter are clean If the temperature is correct and the optical surfaces and coolant are clean yet the output power 1s still low the operating current may need to be slightly raised Contact NG CEO Technical Service if you have any questions 2014 Northrop Grumman Systems Corporation 37 RBAT PowerPULSE User Manual Chapter 5 Maintenance Adjusting the Temperature Set Point for the Re circulating Chiller The temperature set point for the chiller was determined at NG CEO and indicated on the Final Test Report Normally the temperature will not need adjustment It is possible however that this adjustment may be recommended during the later part of the laser diodes lifetime and after several current increases Increasing the diode drive current increases the heat load on the diode resulting in a shift in diode wavelength In order to compensate for this shift a slight decrease of the temperature set point on the chiller may be required Changing the temperature set point will change the output wavelength of the laser diode this adjustment should
48. ty in percent 1 lt RH lt 100 Ty is the air condensation temperature For example suppose your chiller is running at 22 C and the ambient air temperature near the laser is 28 C 82 F Referring to Figure 3 4 and Table 3 4 find the intersection of the 28 C air temperature and the curve for the 22 C diode temperature At a relative humidity of 70 percent or greater condensation will form on the laser diodes 2014 Northrop Grumman Systems Corporation 22 RBAT PowerPULSE User Manual Chapter 3 Module Details Constant Dew Point Lines for Ambient Temperature and Relative Humidity 12 16 C 20 C B Relative Humidity 10 13 16 19 22 25 28 31 34 37 40 Temperature CC Figure 3 3 Constant Dew Point Lines for Ambient Temperature and Relative Humidity 2014 Northrop Grumman Systems Corporation 23 RBAT PowerPULSE User Manual Chapter 3 Module Details Table 3 3 Table of Condensation at Ambient Temperature and Relative Humidity Relative Humidity 1 10 20 30 40 50 60 70 80 90 100 10 43 9 20 2 11 9 6 8 3 0 0 1 2 6 4 8 6 7 8 4 10 0 12 42 6 18 7 10 3 5 0 1 2 1 9 4 5 6 7 8 7 10 4 12 0 16 40 2 15 6 7 0 1 6 2 4 5 6 8 2 10 5 12 5 14 4 16 0 18 39 0 14 1 5 3 0 2 4 2 7 4 10 1 12 4 14 5 16 3 18 0 22 36 6 11 0 2 0 3 6 7 8 11 1 13 9 16 3 18 4 20 3 22 0 24 35 4 9 5 0 4 5 3 9 6 12 9 15 7 18 2 20
49. wer consumption for the specific model of RBAT Series module Table 1 4 shows recommended chillers The chillers have the following features DI Compatible Stainless or plastic wetted components Internal 1kW Heater included Turbine Pump standard RS 232 or RS 485 is not standard but available Dry Contact Remote Start is not standard but available 2014 Northrop Grumman Systems Corporation 8 RBAT PowerPULSE User Manual Chapter 1 Introduction Table 1 4 Recommended Chiller Models Polyscience Chiller Electrical Flow Rate Chiller Capacity Part No VAC Phase Freq 50 psi 6262T31CE10B 120V 1 60 Hz 2 8 GPM 850 W 6252T41CE30E 240V 1 50 Hz 2 3 GPM 700 W 6362T31CE20C 120V 1 60 Hz 2 8 GPM 1400 W 6352T41CE30E 208 230V 1 50 or 60 Hz 2 8 GPM 1280 W 50 Hz 1400 W 60 Hz 6762T41CE30D 230V 1 60 Hz 2 8 GPM 2300 W 6752T41CE30E 240V 1 50 Hz 2 3 GPM 2200 W For heat capacities that are not included in the table contact NG CEO for assistance 2014 Northrop Grumman Systems Corporation 9 RBAT PowerPULSE User Manual Chapter 2 Laser Safety Please read this section carefully before installing or operating your RBAT PowerPULSE module We recommend that all service and repair operations be performed by a NG CEO service engineer If you do plan to service your laser module please follow the procedures in the Service section of this manual Sections included in this chapter provide the following info

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