G4 Manual - Elforlight
Contents
1. 7 TEC2 16 25 Thermistor3 DR aaa A D Thermistor1 For test only NEVER UNDER ANY CIRCUMSTANCES UNPLUG THE LASER HEAD FROM THE POWER SUPPLY WHILST THE SYSTEM IS ENERGISED BY THE EXTERNAL DC SOURCE YOU MAY DESTROY THE LASER DIODE AND INVALIDATE YOUR WARRANTY Do not be tempted to mix and match different laser heads with different power supplies unless you have the interchangeable head option available to larger volume OEM customers If you do try to mix and match laser heads without authorisation both the laser head and power supply will be disabled by software it will not be possible then to produce laser emission It is usual for the system to be shipped with the laser head connected and secured to PL4 It is not recommended that the user disconnects the laser head from PL4 without good reason The laser head may only be disconnected not recommended from the power supply when the system is off and the external power supply is disconnected from PL3 the power connector However make sure the external DC power supply is switched off at the mains first In this case the laser diode in the head will be protected by shorting circuitry even when unplugged from PL4 the laser head connector At all times observe anti static precautions using wrist and heel grounding straps at a designated anti static work station G4 Manual docx 23 15 10 2013 7 0 RS232 Command Set The laser may be remotely controlled by a PC using a2. 2 User Guide G4 Power Supply G4 Manual docx 3 15 10 2013 1 1 System Description The G4 laser system consists of a laser head with a separate power supply unit which contains the drive circuits for the pump laser diode and the temperature control of the laser system There is an interconnecting cable between the laser head which is hard wired into the laser head while having a 25 way D connector for connection to the power supply unit Please note that although the 25way D connector includes circuitry to protect the pump laser diode when the laser head is disconnected from the power supply anti static precautions should still be observed while handling the laser head if it is not connected to the power supply The power supply is available in two options 1 Fully integrated 2 0EM supply comprising a DC supply and controller See G4 test data for type supplied with this laser It is possible to use an alternative D C supply for option 2 However Elforlight must be consulted for advice and evaluation of the alternative supply Failure to do so will invalidate any warranty It is important that any power supply used is incorporates a Safety earth The G4 laser is designed to generate laser output at 532nm The output power level will depend on the model and it should be remembered that all G4 lasers emit laser radiation which is potentially hazardous and it is therefore strongly recommended that before operating the laser for
3. 11 0 Approvals The unit has been tested to and complies with EN61326 1998 calling EN55011 1991 GROUP 1 CLASS B BS EN61000 3 2 1995 AMMENDMENTS 1 2 amp 3 The unit is suitable to be CE marked The unit has been tested to be immune from radio emissions produced by mobile telephones at the specific frequencies of 900MHz and 1 8GHz and a field strength of 3Vm 1 However it is advised that mobile telecommunications equipment should not be used within 1 metre of the laser system 12 0 Flash PAT Testing of external DC Power supply The external DC power supply has been flash hi pot tested by the OEM It is strongly advised not to repeat this procedure which may result in insulation break down Flash testing the unit when connected to the laser controller and laser head may cause damage to the laser diode The external DC power supply may be tested by a PAT tester for earth continuity insulation run current and run leakage current Do not perform these tests with the laser controller and laser head attached and do not perform the flash test if the PAT tester supports this G4 Manual docx 27 15 10 2013
4. 10 0 Specification Diode driver Maximum current 2 5 amps Noise Ripple lt 1 0 rms Compliance 4 volts limit adjustment 0 2 5 amps in 256 steps 9 76mA increments Idemand adjustment 0 Ilimit 256 steps Ilimit 256 increments Feedback mode Current or optical power Dual TEC Peltier driver Maximum current 4 amps Compliance 4 volts Bi directional current control using MOSFET H bridge Temperature sensor 10k ohm 25 C NTC thermistor TEC1 temp range 15 35 C TEC2 temp range 15 40 C Over temperature protection Control via hardware TTL inputs or software RS232 RS232 1 start 8 data 1 stop bits 9600 baud no handshaking no Xon Xoff 3 wire interface RxD TxD and ground LCD hour counter up to 99999 9 hours 0 1 hour 6 minute resolution non volatile factory resettable External D C power supply 5V DC 3 8 A Optional 12V DC 150mA Load regulation 0 5 Line regulation 0 3 Ripple amp Noise 65mV 1 3 Heatsink Cooling Convection or force air cooled Material Extruded aluminium Finish Black anodised If mounting heatsink vertically orientate such that fins are vertical also Various heatsink options available including heat spreader plate contact factory Enclosure Material Aluminium 1mm sheet Finish Clear anodised Weight PSU 300g Heatsink 255g Dimensions PSU 112mm x 106mm x 45mm excluding heatsink Heatsink 150mm x 105mm x 16mm G4 Manual docx 26 15 10 2013
5. If using off the shelf or proprietary serial cables ensure that there are no connections to pins 1 amp 9 at the PC end If you intend to control the laser system via the RS232 interface please contact the factory for further details and command set 6 3 PL3 Power Connector 6 way Molex Minifit Jr The module is energised by an external d c power supply usually supplied by the manufacturer It will be equipped with the correct leads to connect to the module and your country s A C mains supply OEM customers may wish to use their own external d c power supply Specification for the external d c power supply is as follows 5V 8 amps plus 12V 150mA if internal DC DC converter not fitted G4 Manual docx 21 15 10 2013 Connector view looking at power supply Mating free receptacles 6 way Molex 39 01 2 06 0 Crimp sockets Molex 39 00 0078 16 AWG wire size 1 29mm_2 1 8 3 1mm insulation diameter Molex 39 00 0039 24 18 AWG wire size 0 24 0 82mm2 1 3 3 1mm insulation diameter Tooling for Molex Mini Fit Jr Ratchet crimp tool Molex 69008 0724 Extraction tool Molex 11 03 0044 HT60630B G4 Manual docx 22 15 10 2013 6 4 PL4 Laser Head Connector 25 way D type socket For completeness details are given below The user must not dismantle modify the laser head connector as this contains electronics Pin No Function Pin No Function Pin No Function e e a ieee TEC2 Thermistor3
6. Integral heatsink or heat spreader plate User interface interlock on off keyswitch etc RS232 interface Active current limit Active optical power limit Ilimit cannot be exceeded Current or optical power feedback modes Auto power up sequence warmup current mode constant power mode Laser diode protection circuitry Monitor voltage or RS232 of Current limit current setpoint actual current Power limit power setpoint actual power TEC 1 amp 2 temp setpoint actual temp Diode near end of life indicator Diode on time LCD hour counter internal or optional external Heatsink overtemp sensor Laser head overtemp sensor Status amp Diagnostic LED cluster Designed and manufactured in the U K G4 Manual docx 13 15 10 2013 3 0 Connections Plugs amp Sockets The module has a number of plugs and sockets the laser head connector is on one end of the module and the other connectors are on the opposite end All connectors can be secured by screws 4 40 UNC D type or locking barb Molex Plug No Function Connector Type User 25W D type plug RS232 9W D type socket ae a The Molex connector is known as a Molex MiniFit Junior The pin outs and function of the various connectors are described in section 6 below G4 Manual docx 14 15 10 2013 4 0 Indicator and Status LED s VIEWED WITH HEATSINK AT TOP Diode Current greater than 85 of current limit Power Feedback Mode Chipset Temp Lock Solid Emiss
7. simple protocol ASCII characters uppercase only are sent by the PC Characters must be sent one at a time with a time delay between consecutive commands so as not to overrun the serial input buffer 7 1 Command Set 0 Deselect all default 1 Select Ilimit 2 Select Idemand 3 Select Plimit 4 Select Pdemand 5 Select TEC1 temp 6 Select TEC2 running temp 7 Select TEC2 standby temp 8 Select MPD gain channel Increment selected parameter Decrement selected parameter E Enable laser emission R Disable laser emission default D Enable TEC 1 default F Disable TEC 1 C Enable TEC 2 default V Disable TEC 2 Select current feedback mode default P Select light feedback mode Z Zero internal hour counter Request status G4 Manual docx 24 15 10 2013 Notes Ensure single character commands are in upper case only Serial protocol is 9600 baud 1 start bit 8 data bits 1 stop bit no parity no handshaking Default condition on power up Key presses adjust the selected parameter accordingly and store the value in non volatile memory Commands will only be executed if the programming link pins 1 amp 9 shorted in the 9 way D type plug is detected on power up 7 2 Status bytes Subject to change In response to a command the module will return a number of bytes 0 TO 255 in decimal format sent as printable ASCII characters 0 through 9 delimited by spaces o
8. the output power will vary During this sequence the front panel LED emission indicator flashes at 0 5 Hz Only when the LED is on continuously is the power locked at specified power and the laser ready for use Before this lower or higher powers may be observed from the laser The G4 laser exhibits two different start up sequences depending on the length of time the unit has been connected to the mains supply These may be described as 1 Cold start sequence 2 Warm start sequence 1 The cold start sequence is activated when the system has been powered down and is subsequently reconnected to the mains supply that is on initial start up 1 1 Connect power supply to mains supply and switch ON Insert keyswitch and turn ON The cold start sequence now begins with a thermal stabilisation period From power up this phase takes a total of 4 minutes During this period no laser output will be generated irrespective of whether the key switch is in the OFF anticlockwise or ON clockwise position The keyswitch may be switched ON at any time during this 4 minute period without prolonging the next stage of start up After the above 4 minute warm up period the supply switches automatically to an open loop control mode which lasts 1 minute During this period some laser light may or may not be emitted depending on the individual set up parameters of the laser After the above 1 minute open loop pe
9. Connections Integrated power supply Connect the laser head to the 25 way D socket on the rear panel of the unit Observe standard antistatic precautions Connect the supplied interlock plug to the socket on the front panel Connect mains input lead Insert key into keyswitch OEM power supply Connect the laser head to the 25 way D socket on the controller Connect the flying lead containing the key switch and interlock connection to the 25 way D connector on the opposite side of the power supply This interlock should be incorporated into any area or enclosure interlock system Please contact Elforlight for advice regarding suitable interlock arrangements Connect the DC supply to the white six way locking connector on the power supply unit ensuring that the separate earth lead is connected to the earth stud and is securely fastened using the Nylock nut supplied Ensure that the external interlock circuit is closed either by use of the supplied shorted connector temporarily for test only or via a user supplied door or enclosure protection circuit The interlock connector contacts are on the keyswitch flying lead for OEM power supplies G4 Manual docx 8 15 10 2013 Operation The following sequences apply to both integrated and OEM power supply The only process LED visible on the integrated supply is the Emission indicator on the front panel The G4 laser executes a start up procedure during which
10. as the laser diode ages Alternatively when in power feedback mode the diode current may be higher than normal due to non optimised heatsinking etc Bear in mind that high power units gt 100mW may require higher diode currents and so this LED may be lit all the time LED 9 is illuminated when the laser is operating in current feedback mode e g during the warm up period LED 2 is the laser emission indicator This will flash when the laser is warming up in current feedback constant diode current mode and be permanently on when the unit has warmed up and is operating is optical feedback constant laser power mode When this LED is off the laser diode driver is off and no current is passing through the laser diode LED 1 is illuminated when the laser is operating in optical feedback mode e g after the warm up period has completed and the laser is giving stabilised laser output power G4 Manual docx 16 15 10 2013 5 0 Switch on off sequence The laser system can be operated in its simplest form by two inputs to the user connector in the form of simple external voltage free contacts or TTL signals The two input signals are referred to as a Interlock b Keyswitch These inputs are low current TTL inputs internally pulled up to 5V with 10k ohm resistors Therefore if using external volt free contacts make sure they are high quality with silver or gold plated contacts designed to switch low current TTL signals The int
11. aser to operate The key is captive in the operational position As such the key should be removed from the laser when not in use and or unattended and stored in a safe place Eye and skin exposure to direct or scattered laser radiation is hazardous and should be considered potentially extremely harmful Suitable eye protection should be worn at all times whilst laser output is possible Contact Elforlight for advice on suitable eye protection products The laser beam path should be terminated with a non reflecting beam stop Beam paths should be enclosed where possible and should not be at eye level if practical Care should be taken that all mirrors and optics used are securely positioned and fixed to prevent movement Care should be taken at all times to prevent stray reflections from surfaces in the beam path G4 Manual docx 6 15 10 2013 1 4 System Handling Mounting and Heatsinking It must be appreciated that any solid state laser system especially the laser head is a sensitive piece of scientific equipment Whilst every effort has been made to provide a product that is rugged and reliable it is essential that the laser head is handled with care especially when mounting Do not drop or subject the head to impact shock such as placing it down hard on a surface ANY DAMAGE OR MALFUNCTION OF THE EQUIPMENT DUE TO EXCESSIVE FORCE MAY INVALIDATE ANY WARRANTY Mounting the laser head The laser head base plate is permane
12. cally noisy source RPU Pin 16 amp 17 330 ohm resistive pull up to 5V If external LED s are required to be used in conjunction with the EMM and AT_LIMIT outputs connect the LED anode to RPU and LED cathode to either EMM or At_LIMIT COUNT_HRS Pin 18 12V output active high This output is driven high whenever there is laser diode current flowing The hour counter shows the cumulative laser diode on time in 0 1 hour increments to a maximum of 99999 9 hours 11 4 years RESET_HRS COUNT_HRS 12V GND These pins are for use with an external hour counter U_INTLK Pin 21 TTL output active low This output is the micro processor latched interlock output This output is internally pulled up to 5V with a 10k ohm resistor and is driven low when the external interlock input on pin 1 is open or driven logic high This output is latched in that it will remain driven low even when the external interlock input on pin 1 is driven low again Either power off the unit or toggle the keyswitch to the off position if it was in the on position when the interlock chain was broken to clear the interlock condition G4 Manual docx 20 15 10 2013 6 2 PL2 RS 232 Connector 9 way D type socket Pin No Function ISETUP o A l N pan Do not connect pin 1 to pin 9 This will cause the unit to enter RS232 control factory setup mode and operating parameters may be changed The laser may not then perform to specification
13. e emitting radiation at 808 nm within the head package THE LASER HEAD COVER MUST NOT BE REMOVED No customer serviceable parts are contained therein Such access may invalidate any warranty offered by the manufacturer Indicators An emission indicator on the front panel of the power supply indicates that laser emission is possible External interlock The G4 series laser systems are provided with an external interlock facility On fully cased power supplies those with serial numbers beginning 18 10 it is provided as a socket on the front panel For OEM supplies it is provided as an in line link on the keyswitch cable This connector requires contact closure to enable laser operation The fully cased supply is provided with a shorted connector which may be incorporated into an external interlock chain if needed eg a room door switch or enclosure cover switch If the interlock is broken it is necessary to power down the laser at the keyswitch then remake the interlock connection and commence the start sequence again to resume laser output G4 Manual docx 5 15 10 2013 1 3 Recommended Safety Precaution during Laser Operation The laser should be used in an enclosed area with access restricted to trained personnel The area should be clearly labelled and the entrance marked with the class of laser Class 3B Only trained personnel should be allowed to use the laser The key must be inserted in the keyswitch and turned to enable the l
14. erlock is typically wired in series with the users access doors etc Again make sure the external circuit is volt free as damage will be caused if connected to mains voltage If not used it may be permanently linked out The keyswitch input is used to switch the laser on or off It does not have to be a keyswitch a good quality switch or TTL input will work The use of a keyswitch will prevent unauthorised use of the laser Safety issues may require the use of a keyswitch with the key only removable in the off position Powering up from cold External power is off Interlock chain is made Keyswitch is off External power on Watchdog LED flashes Keyswitch is on Emission LED flashes After an initial warm up period of 5 minutes the laser diode is energised in current feedback mode Red current mode LED is on After a further 1 minute warm up period the laser is switched to optical feedback mode and the emission LED is permanently on Red current mode LED is off Green optical feedback mode LED is on Warmed up TTL signal is asserted active low G4 Manual docx 17 15 10 2013 At any stage the keyswitch input may be switched off to inhibit laser emission Breaking the interlock whilst the laser is on will cause emission to be stopped Making the interlock again will not cause immediate emission if the keyswitch is still on The module must detect an on to off to on transition of the keyswitch before emission will
15. f sequence 6 0 Connector pin out detail 6 1 PL1 User connector 6 2 PL2 RS232 connector 6 3 PL3 Power connector 6 4 PL4 Laser head connector 7 0 RS232 Command Set 7 1 Command Set 7 2 Status bytes 7 3 Scaling 7 4 Other Protocols 8 0 Heatsinking and Orientation 9 0 Mechanical Mounting 10 0 Specification 11 0 Approvals 12 0 Routine Flash PAT testing of DC Power supply G4 Manual docx 11 15 10 2013 1 0 Introduction The G4 power supply is available as a single integrated supply or an OEM DC supply controller Both options are designed to control a laser diode and two TEC coolers The units are micro processor controlled and can operate a laser system or laser diode in constant current or constant power mode 1 1 Integrated power supply This single unit has a front and back utility panel The front panel contains 1 1 1 Mains switched and fused input socket 1 1 2 Interlock socket 1 1 3 Emission indicator 1 1 4 Keyswitch 1 1 5 RS232 port The rear panel contains 1 1 6 25 way D type connector to laser head Do not at any time connect or disconnect the laser head whilst the supply is powered Apart from the basic control features already outlined the only user interface available which may be accessed is the RS232 port Refer to section 6 2 G4 Manual docx 12 15 10 2013 1 2 OEM supply All details are as follows in section 2 0 onwards 2 0 Features Compact module utilising surface mount technology
16. ion Flashing Warmup Diode Temp Lock Current Feedback Mode Flashing CPU OK Fault overtemp etc Interlock open Interlock open Fault overtemp etc Flashing CPU OK Current Feedback Mode Solid Emission Diode Temp Lock i Flashing Warmup Chipset Temp Lock Power Feedback Mode Diode Current greater than 85 of current limit VIEWED WITH HEATSINK AT BOTTOM a G4 Manual docx 15 15 10 2013 Notes LED 9 should be flashing as soon as power is applied If LED1 is permanently on or off this indicates that the processor software has crashed LED s 7 and 8 are illuminated when TEC1 and TEC2 are within 0 5 C of their respective temperature setpoints LED 6 is illuminated when the interlock chain is opened This condition is latched and can only be cleared by switching the keyswitch input off and then closing the interlock chain The laser may then be energised by closing the keyswitch input LED 5 is illuminated when various fault conditions exist such as TEC1 hot cold TEC2 hot cold Laser head hot PSU heatsink hot PSU and laser head data do not match LED 4 is illuminated when the monitored diode current is gt 85 of the diode current limit value This condition is not a fault but a useful indication that the laser diode may be reaching the end of its life when the laser is operating in optical feedback mode That is it takes more diode current to achieve a certain pre set laser power output
17. lA BLIN ELFORLIGHT G4 Series Diode Pumped Solid State lasers Elforlight Ltd 4B Brunel Close Drayton Fields Daventry Northants NN11 8RB UK Tel 44 1327 300069 Fax 44 1327 300076 www elforlight com G4 Manual docx 1 15 10 2013 NOTICE Elforlight Ltd has made every attempt to ensure that the information in this document is accurate and complete Elforlight Ltd assumes no liability for errors or for any incidental consequential indirect or special damages including without limitation loss of use delays or lost profits or savings arising from the use of this document or the product which it accompanies The contents of this manual are subject to change without notice Please contact the factory to ensure you have the latest revision of this document before embarking on critical design No part of this document may be reproduced or transmitted in any form or by means electronic or mechanical for any purpose without written permission from Elforlight Ltd Elforlight Ltd acknowledges the trademarks of other organizations for their respective products or services mentioned in this document 2011 Efforlight Ltd All rights reserved G4 Manual docx 2 15 10 2013 Contents 1 Basic User Manual 1 1 System Description 1 2 Laser safety 1 3 Recommended safety precautions during laser operation 1 4 System handling mounting and heat sinking 1 5 Basic Operation Connections Start up procedure
18. ntly attached and cannot be removed In isolation the plate will not provide adequate heat sinking and must be bolted to a suitable material capable of dissipating up to 15W of waste heat we would recommend aluminium or copper The base plate incorporates four M6 counter bored clearance holes for this purpose Stainless steel optical tables are not ideal and may cause overheating of the laser head leading to shutdown of the system The use of thermal paste is also not recommended as it can act as an insulator if not correctly applied Elforlight will provide advice regarding correct mounting procedures and thermal transfer issues if required on request PLEASE BE ADVISED THAT DAMAGE OR MALFUNCTION OF THE EQUIPMENT DUE TO INADEQUATE HEATSINKING MAY INVALIDATE THE WARRANTY G4 Manual docx 7 15 10 2013 1 5 Basic Operation The G4 and Diode Pumped Laser Systems are designed for simple user friendly control with the minimum of user defined parameters All G4 lasers are designed as fixed power level devices The power drawn from the AC mains is less than 100 VA typically approx 50 VA The laser head incorporates laser diode protection circuitry and therefore the laser diode is protected even when disconnected from the laser power supply However Elforlight recommend the observance of full anti static precautions during connection and disconnection of the system sub units Please contact Elforlight for recommended anti static procedures
19. occur 6 0 Connector Pin Out Detail 6 1 PL1 User Connector 25 Way D type plug Pin No Function EXT_MOD 21 u_INTLK 22 IMON DT_MON COUNT_HRS ol IINTLK Pin 1 TTL input active low The interlock input is internally pulled up to 5V by a 10K ohm resistor When connected to GND PL1 pin 14 or driven to logic low the interlock is sensed as being OK IKEYSW Pin 2 TTL input active low The keyswitch input is used to switch the laser on or off provided that the interlock input is OK It is internally pulled up to 5V by a 10K ohm resistor When connected to GND PL1 pin 15 or driven to logic low the keyswitch is sensed as being made and laser emission will occur G4 Manual docx 18 15 10 2013 EMM Pin 3 TTL output active low This output is driven low when there is laser emission i e laser diode current is not zero and the crowbar is off It is asserted when yellow emission LED8 is illuminated IAT_LIMIT Pin 4 TTL output active low This output is pulled up to 5V by a 10K ohm resistor and is driven low when the diode current is within 95 of its current limit This condition is not a fault but a useful indication that the laser diode may be reaching the end of its life when the laser is operating in optical feedback mode That is it takes more diode current to achieve a certain pre set laser power output as the laser diode ages RESET_HRS Pin 5 12V output active high This output is d
20. r lt CR gt lt LF gt 7 4 Other Protocols Large volume OEM users may request different protocols so that the module may be integrated into their systems Please bear in mind that the microprocessor used has limited program data memory so extravagant protocols USB etc will not be offered Contact the factory for further details 8 0 Heatsinking and Orientation The unit is equipped as standard with a black anodised finned heatsink If the module is to be mounted vertically the user should ensure that the heatsink fins run vertically also If the subsequent orientation of the connectors is not suitable the heatsink may be rotated by 90 degrees please contact the factory for further details If the module is mounted so that the heatsink is upside down i e at the bottom of the module it may be necessary for the user to provide forced air cooling from a fan etc This is only applicable to higher power laser systems gt 100mW 532nm As an option the module may be supplied without a heatsink but mounted on a metal plate The user may then mount the module via the metal plate However thermal interface and heat transfer issues must be addressed by the user Please contact the factory for further details G4 Manual docx 25 15 10 2013 9 0 Mechanical mounting The unit is mounted using M3 screws M3 mounting holes are located in the heatsink or heat spreader plate Ensure screws do not penetrate the heatsink by more than 8 mm
21. riod the laser output is ramped up from a low value to full output after which it remains in a power locked mode The total time for this power ramp is dependent upon the specific power level set At the end of this period the Emission indicator will remain permanently on The warm start sequence is activated any time the key switch is moved from the OFF position to the ON position provided the system has been powered up for at least 4 minutes The warm start sequence activates the final two periods as in 1 above that is the open loop period and the power ramp period G4 Manual docx 9 15 10 2013 NOTE 1 if the system is powered down even momentarily at any time or the interlock broken when the system is powered up subsequently the system will automatically revert to the cold start sequence NOTE 2 During the open loop and power ramp operation phase the laser output power will vary significantly from the specified output power This behaviour is quite normal as during this period optical stabilisation is occurring NOTE 3 for descriptions of the mode of operation of the external interlock please refer to section 5 0 of the Laser Power Supply User Guide included G4 Manual docx 10 15 10 2013 2 User Guide G4 Power Supply Table of Contents 1 0 Introduction 1 1 Integrated power supply 1 2 OEM power supply 2 0 Features 3 0 Connectors 4 0 Indicator and Status LEDs 5 0 Switch on of
22. riven high when it is required to reset the LCD hour counter to zero This function can only be carried out by the manufacturer 12V Pin 6 Power This pin is connected to the 12V supply and is only intended to power an external LCD hour counter Do not use for any other purposes current supply is limited to 100mA INT EXT Pin 7 TTL input active low This input has been reassigned and is driven low when the laser has warmed up and there is laser emission in optical feedback mode Diode Current 0 5V analogue voltage output monitor ILIMIT Pin 8 Diode current limit setpoint IDEMAND Pin 10 Diode current setpoint when in current feedback mode IMON Pin 22 Diode actual current Sensitivity 0 5V per 1 0 amp 5V corresponds to a current of 2 5 amps Laser Power 0 5V analogue voltage output monitor PLIMIT Pin9 Laser power limit setpoint PSET Pin 11 Laser power setpoint PMON2 Pin 23 Laser power monitor Sensitivity T B D 5V corresponds to a power of T B D mW G4 Manual docx 19 15 10 2013 Temperature 0 5V analogue voltage output monitor DT_SP Pin 12 TEC1 temperature setpoint DT_MON Pin 24 TEC1 actual temperature CT_SP Pin 13 TEC2 temperature setpoint CT_MON Pin 25 TEC2 actual temperature Sensitivity 100mV per 1 0 C 2 5V corresponds to a temperature of 25 0 C OV Pins 14 15 and 19 Power These pins are connected to the module s ground plane and external OV supply Do not connect to a known electri
23. the first time users should thoroughly familiarise with the contents of this manual Of particular importance are the sections dealing with safe operation of the laser and general safety issues Please refer to separate power supply operator s manual for full details of power supply operation G4 Manual docx 4 15 10 2013 1 2 Laser Safety This handbook contains a description of controls adjustments and procedures for normal operation of the laser CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure Classification Elforlight G4 series lasers are classified as class 3B Lasers as defined by BS EN 60825 1 1994 and by the United States Centre for Device and Radiological Health CDRH 21 CFR Ch 1 subsection 1040 This designates potential danger of eye or skin damage by exposure to direct or scattered radiation It is recommended that all users should thoroughly familiarise themselves with these safety standards before operating the laser for the first time It should be noted the all G4 lasers are designed as OEM sub systems As such they do not comply with all the requirements of BSEN 60825 1 1994 and CDRH 21 CFR Ch 1 subsection1040 It is the user s responsibility to ensure full compliance with these standards Emission The laser emits CW radiation at 532nm Powers up to 450mWatt may be generated The laser head also contains a laser diod
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