User Manual - CEO Knowledge Center
Contents
1. User Manual RB Plus Diode Pumped Nd YAG Rod Laser Modules RBA2X RBA3X CEO UMAN 0004 J JUNE 2012 Worldwide Technical Support and Product Information www northropgrumman com Search ceolaser Hours 8 00 a m to 5 00 p m Central time Technical Support 636 916 4900 press 1 for department directory then 2 for service Email st ceolaser info ngc com Cutting Edge Optronics Headquarters 20 Point West Blvd St Charles MO 63301 USA Sales Support 636 916 4900 press 1 for department directory then 1 for sales Service Support 636 916 4900 press 1 for department directory then 2 for service 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 2006 2012 Cutting Edge Optronics a division of Northrop Grumman Corporation All rights reserved Northrop Grumman Corporation i RB Pius User Manual Important Information Warranty Summary Cutting Edge Optronics warrants that the products that it manufactures and sells will be free from defects in materials and workmanship for a period of one year from the date of shipment from an authorized Cutting Edge Optronics distributor If a product proves defective within the respective period Cutting Edge Optronics will provide repair or replacement as described in the complete warranty statement To arrang2. Northrop Grumman Corporation 19 RB plus User Manual Chapter 3 Operation Table 3 2 Avoid with Chillers Avoid with Chillers Untreated De ionized water lron or aluminum parts in plumbing loop Operation below air condensation temperature CEO recommends chiller water have a resistivity of less than 1 0 MQ Deionized water can be used if the resistivity is closely monitored and the coolant loop does not have iron or aluminum parts 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 RB Plus 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 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 Cutting Edge Optronics 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
3. N2 or encased in a sealed enclosure with a desiccant 4 Northrop Grumman Corporation 23 RB plus User Manual Chapter 4 Installation and Operation NGAS CEO recommends using the eDrive diode drive electronics and a Polyscience chiller to operate the RB Plus module see Chapter 1 for chiller capacities The following chapter contains step by step procedures detailing the installation and operation of the RB Plus module with these peripherals This chapter covers RB Plus Laser Module Assembly and Connections Closed Loop Water Chiller Assembly Starting the Laser Pre start Conditions Turning on the Laser System Powering the RB Plus Module Standby Condition Turning Off the System The purchaser is responsible for any loss and injury during installation and use of the RB Plus module NGAS CEO recommends that a qualified service technician install and maintain the RB Plus module If you intend to service the RB Plus module yourself please follow the following procedures Northrop Grumman Corporation 24 RB plus User Manual Chapter 4 Installation and Operation RB Plus 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 l Check to make sure the AC power switch located on the rear panel of the eDrive Laser Diode Controller is
4. Chiller The module coolant loop is designed for an operating pressure of 50 psi Chillers which deliver the required flow rate at lesser pressure do not provide adequate cooling The selected chiller must have a heat capacity of greater than the waste heat for the specific model of RB Plus module Depending on the model of RB Plus the module dimensions rod size output power and power consumption varies Therefore CEO recommends different model of chiller depending on the number of diode bars in a module and the local electricity which will power the chiller The following table Table 1 1 gives the CEO recommendations Northrop Grumman Corporation 5 RB plus User Manual Chapter 1 Introduction Table 1 1 CEO Recommended Chiller Table c Hz Electrical Outlets Model Waste ddr on Chiller Chiller ae TS Capacity RBAx0 0 33C2 800 W RBAx0 0 66C2 800 W RBAx0 1C2 800 W RBAx4 1C2 1200 W RBAx5 1C2 1200 W RBAx0 2C2 2500 W RBAx0 1C4 1200 W RBAx4 1C4 2500 W RBAx5 1C4 2500 W 50 Hz Electrical Outlets Current Heat No Capacity RBAx0 0 33C2 664 W RBAx0 0 66C2 664 W RBAx0 1C2 996 W RBAx4 1C2 996 W RBAx5 1C2 2075 W RBAx0 2C2 2075 W RBAx0 1C4 996 W RBAx4 1C4 2075 W RBAx5 1C4 1551 W 6752T41CE30E 2075 W Specifications RB Plus 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 80 reflective output c
5. Temperature at Given Ambient Air Temperature Celcius and Relative Humidity percent 23 Figure 4 1 Connection Diagram 26 Figure 4 2 eDrive Rear Panel 26 Figure 4 3 Chiller Assembly Drawing 27 Figure 5 1 Rod Replacement Drawing 32 Figure 5 2 Nitrogen Leak Test Layout 35 Northrop Grumman Corporation Xi RB Pius User Manual Chapter 1 Introduction This introduction provides the following information Theory of operation Temperature Tuning of Laser Diodes RB Plus description Closed Loop Re circulation Distilled Water Chiller Specifications Northrop Grumman Corporation 1 RB Plus User Manual Chapter 1 Introduction Theory of Operation The RB Plus module was designed for use as a building block engine in the development or production of medium power rod laser systems or as a drop in replacement for arc lamp pump chambers in industrial lasers It is well suited for medium power applications such as laser marking and can provide high stability and beam quality for more precise micro machining and scientific applications Northrop Grumman Aerospace Systems Cutting Edge Optronics NGAS 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 The RB Plus module
6. The Continuous wave diode arrays are sensitive to excessive thermal cycling Current should not be turned off completely and then restored to full operating current more than 6 times per day Current should be gradually 3A s ramped up when operating current restored See chapter 3 for more details CEO recommends Optishield Plusrw distilled water coolant 10 Optishield Plusry 90 distilled water CEO modules are leak tested to 80 psi with Nitrogen gas CEO recommends 50 psi of chiller collant for actual operation Northrop Grumman Corporation 8 RB plus User Manual Chapter 2 Laser Safety Please read this section carefully before installing or operating your RB Plus module We recommend that all service and repair operations be performed by a NGAS Cutting Edge Optronics 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 information Caution amp Warning Statements Precautions for Safe Operation of Class IV Lasers Center for Devices and Radiological Health CDRH OEM Product Key to Radiation Control Drawing Safety Device Checklist Northrop Grumman Corporation 9 RB plus User Manual Chapter 2 Laser Safety Caution amp Warning Statements gt be PR WARNING The NGAS Cutting Edge Optronics RB Plus component when used as a laser oscillator is a Class IV High Power Laser
7. flow rate GPM 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 What is the laser cavity configuration What is the measured CW power W When did the problem happen Have you changed any settings recently yes no Northrop Grumman Corporation 40 Appendix A Customer Service RB plus User Manual Appendix A Customer Service What are the changes made recently to the system Please describe the problem or RB Plus behavior as detailed 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 st ceolaser info ngc com Northrop Grumman Corporation 41 RB plus 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 mass length time frequency force energy power electric current electric charge electric potential resistance inductance magnetic flux magnetic flux density luminous intensity temperature gram meter second Hertz Newton Joule Waitt Ampere Coulomb Volt ohm Henry Weber Tesla candela Kelvin Northrop Grumman Corporation 42 Prefixes RB Pius User Manual Append
8. 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 Northrop Grumman Corporation 10 RB plus 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 NGAS CEO system control electronics are provided with interlock inputs to preclude operation with an 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 reflect
9. if the pressure drop is greater than 3 psi FAIL if the pressure drop is less than 3 psi PASS Northrop Grumman Corporation 34 RB plus User Manual Chapter 5 Maintenance Test Article Water Ports f Pressure Nitrogen Gauge Source Figure 5 2 Nitrogen Leak Test Layout Adjusting the Operating Current The specification for laser module 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 25 A of current Due to the high average powers of the diode bars used in your NGAS Cutting Edge Optronics laser module it is reasonable to expect the diode array to gradually degrade with use Determining when the current limit requires adjustment Make sure the temperature is at the correct set point If the temperature is incorrect low output power can result leading to unnecessary current increases Check to make sure the rod faces are clean If the rod faces are dirty low output power will result leading to unnecessary current increases Check to make sure the coolant and filter are clean If the coolant is dirty deposits accumulate on the Nd Y AG rod which prevents absorption of diode light This results in low output power leading to unnecessary current increases If the temperature is correct and the rod faces and coolant are clean yet the output power is still low the operating current may need to be slightly r
10. in the OFF position Connect ring tongue terminals on the base of the RB Plus 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 If an external power supply is used 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 upper 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 if used cords into the appropriate facility power The eDrive diode driver 1s equipped with universal power circuitry accepting voltages ranging from 100 260 VAC and a frequency range of 47 63 Hz Northrop Grumman Corporation 25 RB plus User Manual Host Computer Used only if optional external computer control is implemented RS XXX or CAN BUS External Power Facility Power or Power Supply Input Power Array Output eDrive Figure 4 1 Connection Diagram Power Supply Remote Input Terminals Array Drive AC Power Output Terminals Input Interlock Ch
11. 0 minutes 2 Place a shorting connector across the module electrical contacts see example Figure 1 1 3 Store module in a clean dry atmosphere relative humidity less than 30 If necessary place module in a sealed bag with some form of desiccant The approximate diode bias voltage for the different models of RB P us module can be found in the Specifications table at the end of chapter one The electrical system should deliver approximately 10 more volts depending on the FET used The final test report shipped with the RB P us module indicates the beginning of life current required to obtain the module s rated output power in a short cavity test NGAS CEO recommends users not exceed the listed current as overdriving the module reduces diode lifetime The RB Plus module connects to diode drive current via a ring tongue terminal 8 32 UNC 2B see Figure 3 1 Positive and negative terminals are etched into the cover NGAS CEO will sell cables for connecting this plug to customer s preferred electronic connector Customer should specify connector type and cable length Northrop Grumman Corporation 16 RB plus User Manual Chapter 3 Operation Figure 3 1 RB Plus with Ring Tongue Terminals RB Plus module output is a result of the optical pump power from the continuous wave laser diodes These continuous wave diodes are sensitive to thermal shock from repeatedly applying and removing drive current Diodes should not be cycled on o
12. 820 Pump Array Center Wavelength nm Figure 1 3 Pump Light Absorption vs Pump Array Center Wavelength RB Plus Description The RB Plus module utilizes a radial transverse pump geometry to excite the solid state laser medium see Figure 1 4 This pump geometry results in excellent gain uniformity and lensing performance The reflector directs the divergent diode light back to the laser medium which is kept in a flow tube for coolant circulation The laser medium is a rod of neodymium doped yttrium aluminum garnet Nd YAG Both ends of the rod are optically polished and include anti reflection coatings at the lasing wavelength The ends of the Nd YAG rod may be curved to compensate for thermal lensing depending on module configuration Northrop Grumman Corporation 4 RB plus User Manual Chapter 1 Introduction Diode Array Heat Exchanger Reflector low Tube Nd YAG Rod 4 UN ON Diode Array L Figure 1 4 Radial Pump Geometry The RB Plus is available in three physical sizes 2 6 H x 1 82 W inches by 2 31 L 3 47 L or 3 81 L depending on model The short version of the RB Plus is available in 3 6 9 and 18 diode bar versions The mid length model is a 12 diode bar model and the long model has 15 diode bars Each of the various versions 1s available with either a 2 mm or a 3 mm diameter rod of Nd Y AG in the appropriate length See Figure 6 for specs Closed Loop Re circulating Distilled Water
13. 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 thick rod of 0 6 doped Nd YAG In CEO modules the laser diode center wavelength under normal operating conditions is near the absorption 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 Northrop Grumman Corporation 9 RB plus User Manual Chapter 1 Introduction Modeled Pump Light Absorption vs Pump Array Center Wavelength c o Spectral Width of 3 Pump Array rr a mum 2 nm fwhm X 5 mm 4 nm fwhm a E 2 a o 6 35 mm z diameter rod 0 6 Nd YAG 2 pass absorption 790 795 800 805 810 815
14. RH d 17 27xT RH In 237 7 T 100 T is the ambient air temperature in degrees Celsius 0 lt T lt 60 RH is the relative humidity in percent 1 lt RH lt 100 Ta 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 Northrop Grumman Corporation 21 RB plus User Manual Chapter 3 Operation Constant Dew Point Lines for Ambient Temperature and Relative Humidity 12 9C 16 C 70 C 24 C 2B C 100 Relative Humidity 95 22 C 10 13 16 19 22 25 28 31 34 37 40 Temperature C Figure 3 1 Constant Dew Point Lines for Ambient Temperature and Relative Humidity Northrop Grumman Corporation 22 RB plus User Manual Chapter 3 Operation Table 3 3 Table of Air Condensation Temperature at Given Ambient Air Temperature Celcius and Relative Humidity percent Relative Humidity O Co 2 NO 2 N 2 Co 3 If required to operate a laser in conditions near to the condensation temperature take precautions to keep the RB Module dry The module should be operated inside an area that is purged with nitrogen
15. aised Contact your NGAS Cutting Edge Optronics field service engineer if you have any doubts CAUTION Raising the current limit before it becomes necessary can severely shorten diode lifetime Adjusting the Temperature Set Point for the Re circulating Water Chiller The temperature set point for the water chiller was determined at NGAS 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 by your Cutting Edge Optronics field service engineer 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 adjustment most likely colder of the Northrop Grumman Corporation 35 RB plus User Manual Chapter 5 Maintenance temperature set point on the recirculation water chiller may be required Changing the temperature set point will change the output wavelength of the laser diode this adjustment should 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 Every six months the chiller should be drained and cleaned The filter should be r
16. apter 4 Installation and Operation Laser Module e Poe eine ee ua at ed O OQ O O O 00 0 oO 000000 O O AE Eg as O o o Pd og C Figure 4 2 eDrive Rear Panel Northrop Grumman Corporation 26 RB plus User Manual CHILLER OUTLET Chapter 4 Installation and Operation NPT 3 8 3 NPT 3 NPT 3 8 3 8 to 1 to 3 8 reinforced to 3 8 to3 g reinforced 1 4 reinforced TO RB barb Hose 18 barb barb Hose 6 Reducer Hose 24 PLUS INLET COOLANT OPTISHIELD Plus CAPACITY 1 1 U S gallons To Driver Coolant Interlock 7 NPT 3 8 3 8 Flow 3 8 3 8 3 8 to 1 4 FROM to 3 8 reinforced Female Switch Female reinforced 1 4 reinforced RB es Hose 18 Barb Barb Hose 6 Reducer Hose 24 PLUS Figure 4 3 Chiller Assembly Drawing Closed Loop Water Chiller Assembly Northrop Grumman Corporation 27 1 Place the chiller on the floor near the RB Plus 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 RB Plus 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 1 e wall The standard plumbing arrange
17. ares 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 can 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 Contacting customer service Return the instrument for repair Northrop Grumman Corporation 37 RB plus User Manual Chapter 6 Service Contacting Customer Service To expedite your service needs please complete the questionnaire in Appendix A Customer Service before you contact Cutting Edge Optronics 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 Cutting Edge Optronics 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 Cutting Edge Optronics Contact Cutting Edge Optronics 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 Cutting Edge Optronics to ship your
18. e for service or obtain a copy of the complete warranty statement please contact your nearest Cutting Edge Optronics sales and service office EXCEPT AS PROVIDED IN THIS SUMMARY OR THE APPLICABLE WARRANTY STATEMENT CUTTING EDGE OPTRONICS MAKES NO WARRANTY OF ANY KIND EXPRESS OR IMPLIED INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PUPOSE IN NO EVENT SHALL CUTTING EDGE OPTRONICS BE LIABLE FOR INDIRECT SPECIAL OR CONSEQUENTIAL DAMAGES 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 Cutting Edge Optronics Trademarks eDrive and RB Plus are registered trademarks of Northrop Grumman Corporation Patents 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 Corporation iii RB Pius User Manual Safety Information Product End of Life Handling Cutting Edge Optronics 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 Uni
19. ed 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 Northrop Grumman Corporation 11 RB plus User Manual Chapter 2 Laser Safety INVISIBLE LASER RADIATION AVOID EYE OR SKIN EXPOSURE TO DIRECT 3 OR SCATTERED RADIATION Wavelength Power 790 820nm 10W 1064nm 150W CLASS IV Figure 2 1 Standard Safety Warning Sign Center for Devices and Radiological Health CDRH OEM Product The RB Plus 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 RB Plus module is capable of emitting Class IV radiation and ex
20. eed this warning may result in the destruction or serious damage to the device and will void the product warranty 6 Verify the pressure gauge located on the front panel of the chiller reads approximately 50 psi If 1t 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 7 Verify the temperature located on the front panel of the chiller reads appropriately Optimum temperature is listed on the final test report but will be between 15 C 30 C 8 Connect coolant flow switch to coolant interlock on rear of eDrive diode driver 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 Starting the Laser System Pre start Conditions 1 Wear laser safety goggles which protect user from1064 nm fundamental and 808 nm radiation 2 Position the RB Plus module in a laser cavity such the output will be directed toward a safe target Verify that the system is correctly assembled 4 Verify that the rod faces are clean and not capped or covered Verify that the filter on the closed loop chiller is connected to the inlet hose barb 6 Switch the Closed Loop Chiller to the ON position Verify coolant flow from chiller WARNING Do not operate coolant system below air condensation temperature dew
21. eplaced and new clean coolant should be used in the chiller The recommended procedure for cleaning a chiller is detailed below oy UU dS ae dq 2 Drain chiller completely Remove filter from housing Add the 460 CCL2567 cleaning solution to the cooling system till full Circulate the cleaner for a minimum of 30 minutes Drain system completely Refill system with cleanest water available preferably distilled demineralized or reverse osmosis Circulate rinse water for 20 minutes 8 Drain system completely 10 11 12 13 14 15 Refill system with cleanest water available preferably distilled demineralized or reverse osmosis Circulate second rinse water for 10 minutes Drain system completely Install new 5 micron filter into housing Record cleaning date on sticker with a six month reminder to drain amp clean the system Affix sticker to chiller or cabinet Refill chiller coolant reservoir with coolant 10 Optishield Plusty 90 distilled water Chiller ready to use Northrop Grumman Corporation 36 RB plus User Manual Chapter 6 Service At Northrop Grumman Aerospace Systems 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 comp
22. ff more than 6 times a day When initially applying power to the module the current should be gradually increased 3 A s until the normal operating current is achieved see final test report for initial recommended operating current This ramping process reduces thermal shock and helps prolong diode lifetime If the RB Plus module is going to be installed in a system where quick transitions between lasing and non lasing are repeatedly required then drive current to the diodes should be maintained at 3 A below normal operating current when the system is not lasing This simmer current will keep the diodes at close to the operating lasing temperature and thereby reduce thermal shock The diode arrays within the RB Plus module are aligned and sealed at the factory Other than the laser rod there are no user serviceable parts within the module Contact a NGAS CEO field service engineer for repairs Before lasing the operator should verify that rod faces are clean If necessary the rod faces can be cleaned by following the procedure in the maintenance section of this manual 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 Northrop Grumman Corporation 17 RB plus User Manual Chapter 3 Operation the
23. hort 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 third party drivers which have the capability to servo 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 Northrop Grumman Corporation 18 RB plus User Manual Chapter 3 Operation 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 NGAS 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 Table 3 1 Cooling System Requirements Chiller and Cooling System Requirements Optishield Plustm distilled water coolant 10 Optishield Plustm 90 distil
24. instruments If shipping boxes have been lost or destroyed replacements are available for a nominal charge from Cutting Edge Optronics Remove all coolant from module by blowing dry air through it for 20 minutes prior to packaging for shipment Place a shorting connector across the electrical connector see example Figure 1 1 Place module in a sealed bag inside shipping container Place some form of desiccant in bag with module WARNING Damage from residual water 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 Northrop Grumman Corporation 38 RB plus 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 RB Plus Model Number Serial Number Chiller Model Number Serial Number eDrive Model Number Serial Number RB Plus Manufacture Date RB Plus Operating Hours Northrop Grumman Corporation 39 RB plus User Manual Questions What is the coolant
25. ion IV RB plus 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 0n 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 Northrop Grumman Corporation V RB plus User Manual Laser Emission Use caution Shock Hazard Use caution Caution Risk of danger Refer to manual Chassis Ground Northrop Grumman Corporation vi RB Plus User Manual General Safety Summary The RB Plus module em
26. is available in Nd Y AG with the laser rod AR coated for the highest gain wavelength of this material 1064 nm NGAS CEO also offers the RB Plus module with a Nd YLF rod Throughout this manual we will refer only to the Nd Y AG laser medium The RB Plus 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 Northrop Grumman Corporation 1 RB plus User Manual Chapter 1 Introduction Hour Counter Electrical Contacts shown with short Water Inlet Outlet ing cover Figure 1 1 Exterior Components and Connections Temperature Tuning of Laser Diodes The laser diodes are located within the RB Plus module and tuned wavelength matched via the closed 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 Y AG operation the xenon arc lamp and 808 nm diode array is also shown Northroo Grumman Corporation 2 RB Pius User Manual Chapter 1 Introduction Laser Diode Pump Wavelength 808 nm Xenon flash tube 1700 A cm Bg Absorption spectrum of Nd YAG 300 K soso WL NEC RN W vo Wavelength um Figure 1 2 Nd YAG Absorption Characteristics A single GaAlAs laser diode bar has a 2 nm FWHM distribution of output wavelengths
27. its 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 report all problems to Northrop Grumman Aerospace Systems Cutting Edge Optronics NGAS 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 Northrop Grumman Corporation vii RB Pius User Manual About this Manual This manual describes the installation operation and service of the RB Plus module The manual consists of the following chapters Chapter I Introduction provides a theory of operation description of the module and specifications Chapter 2 Laser Safety describes pro
28. ix C Acronyms Appendix C Acronyms 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 Northrop Grumman Corporation 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 43 RB Plus User Manual Appendix C Acronyms Acronym Description NGAS abies Grumman Aerospace NIR Near Infrared OEM Original Equipment Manufacturer OSHA rer al aa and Health PRF Pulse Repetition Frequency PSI Pounds per Square Inch SHG Second Harmonic Generator TEC Thermo Electric Cooler TTL Transistor Transistor Logic USA United States of America VAC Volts Alternating Current Northrop Grumman Corporation 44 RB plus User Manual
29. led water Coolant circulated at 50 psi Filter connected between chiller and inlet on module Module first in coolant loop Chiller Heat Capacity Power Consumption Table 1 1 Flow sensor connected to coolant interlock on drive electronics 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 will 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 www optishield net home php cat 103 The filter should be capable of removing particles 5 um 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 Every six months or whenever the filter is changed the coolant should be drained The chiller should then be cleaned Finally clean coolant should be circulated This ensures the cleanest coolest coolant passes through the diodes the most expensive component of most lasers When not using CEO drive electronics verify that flow sensor interrupts current to diodes less than 500 milliseconds after a low flow condition occurs
30. ment for a typical closed loop chiller including hose diameters is shown in Figure 4 3 The input output coolant connections on the RB Plus are not polarized Either hose barb on the RB Plus 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 RB Plus 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 3 Fill the chiller reservoir and filter housing manually with coolant 10 Optishield PlusTM 90 distilled water It 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 RB plus User Manual Chapter 4 Installation and Operation CAUTION Do not allow chiller to fill the filter housing as air can become trapped within the system 4 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 h
31. ngs if using a 3mm rod These o rings are supplied with the module 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 Insert the opposite end of the rod into the corresponding hole in one end of the module until it protrudes from the hole in the opposite end Be careful not to chip or scratch the rod while inserting it Place one of the retainer caps onto the endplate and start the three 2 56 screws with lock and flat washers Place the second O ring over the opposite end of the rod Place the remaining cap onto the second endplate and start the three 2 56 screws with lock and flat washers 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 Tighten the retainer caps with the 0 50 Allen wrench 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 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 Leak test according to the following procedure Alternately turn on the chiller and allow coolant to flow for approximately 20 minutes Examine pump module for leaks No
32. on RoHS EU directives Cutting Edge Optronics 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 EE WEEE equipment Contact Cutting Edge Optronics 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 Cutting Edge Optronics includes the following translation about our laser modules HERING GFR ARENDE BRAA E ei Northrop Grumman Cutting Edge Optronics t mih 20 Pointe West Blvd St Charles MO 83301 USA AGER 89 Mirus Series Laser Systems Models Mi xxx xxxx xxxx and AMI xxx Xxxx xxxx e e e 5 l aem camo mo como HANS BOUE UR ARASRARLS Wi 5 19 IEE SA YE Cr l PRR u PRE o X o n x ao u X o 1 5 Oo c FERE Bt QJ HEX X o Se I Xx o Sia Wn aue IELU x du same Lol o 0 ETE EGZREOERHAHSESOZI SJ T 11363 2006 MERA REF px docile d n m e ERROREM A SJ T 11363 2006 Kg IRURE GC Northrop Grumman Corporat
33. op Water Chiller Assembly Starting the Laser System Standby Condition Turning Off the System Chapter 5 Maintenance Northrop Grumman Corporation Ix 10 11 12 13 14 15 16 19 24 25 2f 28 29 30 31 RB Pius User Manual Rod Removal and Replacement Rod Cleaning Leak Test Procedure Adjusting the Operating Current Cleaning the Chiller Chapter 6 Service Contacting Customer Service Return the Instrument for Repair Appendix A Customer Service Questions Appendix B System International Units Appendix C Acronyms Northrop Grumman Corporation 32 34 34 35 36 37 38 38 39 40 42 43 RB Pius User Manual Table of Figures Figure 1 1 Exterior Components and Connections 2 Figure 1 2 Nd YAG Absorption Characteristics 3 Figure 1 3 Pump Light Absorption vs Pump Array Center Wavelength 4 Figure 1 4 Radial Pump Geometry 5 Table 1 1 CEO Recommended Chiller Table 6 Table 1 2 RB Plus Series Model Specifications1 T Table 1 3 RB Plus General Specifications 7 Figure 2 1 Standard Safety Warning Sign 12 Figure 2 2 Radiation Control Drawing 13 Figure 2 3 Warning Labels 13 Figure 3 1 RB Plus with Ring Tongue Terminals 17 Figure 3 2 Reverse Bias Protection Diode Circuit 18 Table 3 1 Cooling System Requirements 19 Table 3 2 Avoid with Chillers 20 Figure 3 1 Constant Dew Point Lines for Ambient Temperature and Relative Humidity 22 Table 3 3 Table of Air Condensation
34. oupler The RBA20 0 33C2 requires a modified test configuration with a 90 reflective output coupler Northrop Grumman Corporation 6 RB plus User Manual Chapter 1 Introduction Table 1 2 RB Plus Series Model Specifications RBA20 RBA30 MODEL 0 33C2 0 66C2 W Rod Size mm 3 x 63 2 x63 Diode Bias Voltage 25 Amps VDC Power Consumption 200 400 935 1200 935 W Module 2 6 H x 1 82 W x 3 07 L inches Dimensions RBA24 RBA34 RBA34 RBA25 RBA35 RBA35 MODEL 1C2 1C2 1C4 1C2 1C2 1C4 2 Diode Bias Voltage 25 24 24 24 30 30 Amps VDC Power Consumption 800 800 1250 1000 1000 1550 W _ Module 26Hx182Wx347L 26Hx182Wx3 88L Dimensions Specifications subject to change without notice Output power from the production test cavity 165 mm 5 mm cavity utilizing a 0 75 mcc HR and flat 80 reflective output coupler At end of life Operating current x Diode voltage x 130 Northrop Grumman Corporation 7 RB plus User Manual Chapter 1 Introduction Table 1 3 RB Plus General Specifications All RB Plus Series Models Type CW Diode Pumped Nd YAG Rod Standard Dopant 0 6 Output Wavelength 1064 nm Polarization Not Polarized Cooling Closed Loop Recycling Coolant Coolant Flow gt 1 0 GPM Coolant Pressure 50 PSI Operating Temperature 20 35 C Optical Center from Base 1 75 inches standard 1 50 inches available eDrive Dimensions 3 48 H x 19 W x 17 65 D inches
35. per 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 RB Plus module Appendix A Customer Service provides information to expedite any service request before contacting Cutting Edge Optronics 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 Northrop Grumman Corporation viii RB Pius User Manual Table of Contents Chapter 1 Introduction Theory of Operation Temperature Tuning of Laser Diodes RB Plus Description Closed Loop Re circulating Distilled Water Chiller Specifications 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 your Module RB Plus Module Closed Loop Chiller Chapter 4 Installation and Operation RB Plus Laser Module Assembly and Connections Closed Lo
36. point at laser head Condensation on the diode arrays can seriously damage the laser head and may void warranty Consult a CEO field service engineer if you have any questions Northrop Grumman Corporation 28 RB plus User Manual Chapter 4 Installation and Operation Turning The Laser System On Mc de e pee uem Verify coolant temperature and flow rate are correct Turn power switch on external power supply to ON position Turn the AC power switch on rear of the eDrive to the ON position Turn the Key switch to the ON position Before applying current to diodes shut off chiller to verify that the Coolant Fault interlock comes on Restart the chiller Select Clear and verify the error display is no longer present Powering the RB Plus Module l 7 Form main menu select Channel Setup Channel 1 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 RB P us modules should never be run with more than 32 Amps however to prevent premature diode degradation you may wish to set this limit at the beginning of module life to 5 Amps greater than the recommended operating current From the main menu select Channel Setup Channel 1 Set Current Use the selector knob to select a low current level of approximately 10A Press EMISSION After a few warning beeps ap
37. proximately 4 second delay the eDrive begins to drive the array Slowly begin to adjust the current amplitude setting until the desired current level 1s achieved For initial use see final test report for current Using an infrared viewer or phosphor card continue increasing the current checking for output at the laser threshold current indicated on the final test report Continue increasing the current until the desired output 1s obtained or until the current reaches approximately 5 A greater than the current used that last time an acceptable laser output was achieved For initial use see final test report for current If you cannot achieve desired output within 5 A contact CEO 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 Northrop Grumman Corporation 29 RB Pius User Manual Chapter 4 Installation and Operation current to the laser diode 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 laser Turning Off the System l 2 3 ue xn E Press the EMISSION button to turn off drive current Close shu
38. rop Grumman Corporation 14 RB plus User Manual Chapter 3 Operation Unpacking your Module Your NGAS Cutting Edge Optronics Model RB Plus 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 NGAS Cutting Edge Optronics representative NGAS 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 manual and a final test report should accompany each unit shipped Northrop Grumman Corporation 15 RB plus User Manual Chapter 3 Operation RB Plus Module Proper storage of the RB Plus module involves three steps 1 Remove all coolant from module by blowing dry air through it for 2
39. rthrop Grumman Corporation 33 RB plus User Manual Chapter 5 Maintenance 17 If pumphead 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 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 First blow optical surface with dry nitrogen Then use either hemostats and lens tissue or a tight wrapped cotton tipped applicator lightly wetted with acetone or methanol to wipe the rod face The wipe pattern should be in a circular motion from center towards edge Inspect the rod for cleanliness Repeat if necessary 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 water 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 2 Close the termination valve Open the inlet valve and adjust the regulator to obtain 80 psi on the pressure gauge 4 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 6 Pass Fail requirements
40. single most expensive component of a RB Plus module so the customer should be careful to connect diode drive current correctly In order to provide the RB Plus modules with some protection against reverse biasing all RB Plus modules are equipped with a reverse protection diode This is another diode usually 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 drive current will be sent through the laser diodes in reverse P le N iiaa Bl M l T N ra AN a T N e J i J gt p A P a a a A d A A P a d T T d T Pd F Pd a 7 P Pd s T LA Reverse Protection Diode Terminals Figure 3 2 Reverse Bias Protection Diode Circuit NGAS CEO drive electronics are designed to detect the shorted reverse protection diode and suspend drive current before damaging the laser diodes Customers who use third party manufactured drive electronics must configure them for use with NGAS CEOs reverse bias protection diodes The driver should be able to detect the shorted condition because with a s
41. this procedure and that it is carried out in a clean environment preferably under a laminar flow hood O Ring Rod D O Ring l 2 56 screws A 77 Ee SD di o f V Y Retainer Beam Tube Cap Support Figure 5 1 Rod Replacement Drawing Remove the beam tube supports from the retainer caps These are just threaded on Northrop Grumman Corporation 32 RB plus User Manual 2 3 10 11 12 13 14 15 16 Chapter 5 Maintenance Remove the retainer caps by removing the six 2 56 button head screws with a 0 50 allen wrench CAUTION Use extreme caution during the remaining steps of this procedure to insure that the rod faces and or coatings are not damaged Never use a tool that can scratch the rod on the O rings To extract the O rings that hold the rod in position place index fingers on each end of rod and apply pressure first at one end then the other Press back and forth until one of the O rings slides out of its notch Once O ring is dislodged press on same end of rod to dislodge the other O ring Repeat this until O ring moves to the end of the rod where it can be easily removed by hand Remove the rod If necessary loosen an O ring with plastic or fiberglass tool CEO recommends Techni Tool 4350122 Be careful not to damage the rod end faces or barrel Unwrap the new rod and inspect the end faces Obtain two 70 60 Viton O rings if using a 2mm rod or two 70 9855 Viton O ri
42. this to function properly a flow sensor must be used in the coolant loop When setting up the laser system for the first time Cutting Edge Optronics recommends 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 a Cutting Edge Optronics field service engineer if you have any questions Northrop Grumman Corporation 20 RB plus User Manual Chapter 3 Operation Air Condensation Temperature The air condensation temperature or dew point 1s 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 RH 17 27 a T RH where a T
43. treme 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 Northrop Grumman Corporation 12 RB Plus User Manual Chapter 2 Laser Safety Patent Number Label No Serviceable Parts Label 5 BeO Alert Environmentally Friendly Use Peroid Label underneath Figure 2 2 Radiation Control Drawing MODEL NO du arranty ERIAL NO p o If Removed DATE This product le cowersd Service by qualified personnel only NO USER SERVICEABLE PARTS WITHIN by one of more of mha following patenis Beryllium Oxide BeO Alert INVISIBLE This product contains BeO insulators BeO dust can have eui E ER RADIATION IS RE 5 813 108 5 310 900 toxic effects when inhaled Do not disassemble this unit pie eel without appropriate training and precautions AVOID EXPOSURE 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 operation of laser and or adjustment of control electronics do not require exposure to laser radiation Northrop Grumman Corporation 13 RB plus User Manual Chapter 3 Module Details This chapter describes basic operation of your RB Plus module This chapter discusses Unpacking your Module RB Plus Module Closed Loop Chiller North
44. tter if installed Switch the main AC power switch on the external power supply located on the front panel to the OFF position Press the main AC POWER switch of the eDrive located on the front panel Hold down for approximately 5 seconds until the eDrive shuts down Allow chiller to run for a couple of minutes 1 2 minutes Switch the closed loop chiller to the OFF position Turn the key switch on the eDrive to the OFF position Remove the key Do not leave the laser accessible to people who are untrained in laser safety or operation Northrop Grumman Corporation 30 RB plus User Manual Chapter 5 Maintenance The chapter contains information in these sections Rod Removal and Replacement Rod Cleaning Leak Test Procedure Adjusting the Operating Current Cleaning the Chiller Northrop Grumman Corporation 31 RB plus User Manual Chapter 5 Maintenance Rod Removal and Replacement The only user serviceable part in the RB Plus module is the Nd Y AG rod which can be replaced by the user YAG rods rarely break frequent replacement may be a sign of another problem in the RB Plus module Contact Cutting Edge Optronics if you have any further questions Beam Tube Support Retainer Cap l 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
45. 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 10 d ESD CAUTION The laser diodes in the RB Plus are sensitive to Electro Static Discharge ESD Never handle the RB Plus module without being properly grounded through the use of properly installed and maintained grounding wrist straps or other ESD control devices Subjecting the RB Plus 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
Download Pdf Manuals
Related Search