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841-P-USB User Manual Rev K

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1. then multiply or add to the actual measured value to calculate the corrected value The 841 P USB will then display the corrected value Figure 2 8 User Offset dialog box For example if you are measuring a laser beam passing through the 99 9 back reflector of a laser giving 1 1000 of the real value choose Multiplier 1 and enter 1000 in the dialog box The 841 P USB will display the laser s actual power rather than the measured 0 1 sample on the main display When a correction factor is active the Head value will be different from the displayed measurement The corrected measurement appears in the top left of the screen It is also essential to make sure that the actual measured value complies with the power and energy limits of the detector head Note that the Statistics are computed for the corrected values only To disable the correction factor re select the Correction Factor multiplier offset in the Corrections submenu of the Settings menu Then select None in that submenu 2 3 2 4 Power Unit By default the measurement unit is Watt The Power Unit setting allows to select Watt or dBm for measurements 2 3 2 5 Energy mode This feature allows the measurement of the energy contained in a single pulse with an 818P Series High Power Detector This mode of operation gives access to the same options as when using an 818E Series Energy Detector The only restriction is that the time delay between pulses D
2. 26 5 Service Information The Model 841 P USB Virtual Power Meter contains no user serviceable parts To obtain information regarding factory service contact Newport Corporation or your Newport representative Please have the following information available 1 Instrument model number 841 P USB 2 Instrument serial number on rear panel 3 Description of the problem If the instrument is to be returned to Newport Corporation you will be given a Return Number which you should reference in your shipping documents Please fill out a copy of the service form located on the following page and have the information ready when contacting Newport Corporation Return the completed service form with the instrument To obtain warranty service contact your nearest Newport agent or send the product with a description of the problem transportation and insurance prepaid to the nearest Newport agent Newport Corporation assumes no risk for the damage in transit Newport Corporation will at its option repair or replace the defective product free of charge However if Newport Corporation determines that the failure is caused by misuse alterations accident or abnormal condition of operation or handling you will be billed for the repair and the repaired product will be returned to you transportation prepaid 6 Appendix B 6 1 1 1 Recycling and separation procedure This section is used by the recycling center when the monitor reache
3. When using an 818P Series High Power Detector and working at a wavelength not available in the Wavelength menu use the custom option in that menu and enter the wavelength you need The wavelength you enter must be within the range of valid wavelengths The 841 P USB interpolates a wavelength correction factor using the pre programmed data in the detector s EEPROM The above interpolation option is not available for the 818 or 918D series Low Power Detectors nor would it be valid because of the rapid changes the responsivity exhibits as a function of wavelength 818 series detectors are normally supplied with an OD3 attenuator and are calibrated both with and without the attenuator However only the calibration data without the attenuator is programmed into the 841 EEPROM If an absolute power is desired and the wavelength of the light source is not on the list of available wavelengths in the Wavelength menu or if you are using the detector with its attenuator then you will need to calculate the correction factor using your detector s Calibration Report The correction factor multiplier Cy is the responsivity of the detector at the current wavelength without the attenuator Ro divided by the responsivity at the desired wavelength or the same wavelength but with the attenuator R Ry GER Once you have entered the correction factor in the 841 P USB software go to Save Settings under the Settings menu and save it Load Settings
4. promptly notify Newport s Returns Department by calling 1 800 222 6440 or by visiting our website at www newport com returns within the warranty period to obtain a Return Material Authorization Number RMA Return the product to Newport Corporation freight prepaid clearly marked with the RMA and we will either repair or replace it at our discretion Newport is not responsible for damage occurring in transit and is not obligated to accept products returned without an RMA E mail rma service Onewport com When calling Newport Corporation please provide the customer care representative with the following information e Your Contact Information e Serial number or original order number e Description of problem i e hardware or software To help our Technical Support Representatives diagnose your problem please note the following conditions Is the system used for manufacturing or research and development What was the state of the system right before the problem Have you seen this problem before If so how often Can the system continue to operate with this problem Or is the system non operational e Can you identify anything that was different before this problem occurred Safety Information Do not use the 841 P USB if the device or the detector looks damaged or 1f you suspect that the 841 P USB is not operating properly Appropriate installation must be done for water cooled and fan cooled detectors Refer to
5. Display Men sesasine asiaa acta senetess 8 23 L L HIStO SEAM nie 8 231 2 Tuning Nella 8 A e A Se 9 ZS Stats iii it 9 A A ata a carts 10 2 3 2 1 Wavelength Seine lidia aces 10 2 3 2 2 Data Sampling Settings sccisccsescssasscacscscatacsseadeee 11 23 23 A O a Biola 14 23 24 Power WIE reia 15 23 20 Energy MOE isis 15 220 Trialera 16 23 27 o 55 30 rein otis i ii 17 2328 Attentato a EAS 17 2 3 2 9 Set Max Analog Out Range oooncccnnccnnoniconncconccanoss 17 2 3 2 10 Analog Out Delay iii caida 18 2 3 2 11 Save As Default Layout 18 2 3 2 12 Save and Load User Settings ooooocccnoncccnoncconnnnnss 18 233A A oe one eer ee ee ene tee ren eee 18 2 3 3 1 COMMUNICATION ooccconncccnncnnccnnnnnnincnnnnnoncnnnnnoniconnnoss 19 vil PS IS Offset seater ute ea sheet ea aa 19 2 3 3 3 Acq ite Data viciricidnin iii da 19 ZOO TAMBO A Ghia Raha s etek coe 19 Zoid 1 e A AAA haved esavnonseta 19 234 Help ABOU eens Bee rade eo cee iid 19 2 3 Shortcut DUROS dd 20 Command Reference 20 USB Installation and Upgrades 24 Verify COM Portal eld eee 25 4 1 Free Software and Firmware Upgrades oooonnoconocccocccinoncnacnconncnnno 25 Service Information 26 Appendix B 27 6 1 1 1 Recycling and separation procedure 27 Gal Separation a al 27 6 1 1 3 Dismantling procedure c oocnoconnnnnnononocnnonnnnonacnonecnnnos 28 1 General Information 1 1 Introduction To obtain the full pe
6. Electromagnetic compatibility EMC Part 4 2 Class B 2009 Testing and measurement techniques Electrostatic discharge EN 61000 4 3 Electromagnetic compatibility EMC Part 4 3 Testing Class A 2006 A2 2010 and measurement techniques Radiated Radio Frequency electromagnetic field immunity test EN 61000 4 4 Electromagnetic compatibility EMC Part 4 4 Testing Class B 2004 A1 2010 and measurement techniques Electrical fast transient burst immunity test EN 61000 4 6 Electromagnetic compatibility EMC Part 4 6 Testing Class A 2009 and measurements techniques Immunity to conducted Radio Frequency I the undersigned hereby declare that the equipment specified above conforms to the above Directive s and Standard s A Comet Mark Carroll Sr Director Instruments Business Newport Corporation 1791 Deere Ave Irvine CA92606 USA Technical Support Contacts North America amp Asia Europe Newport Corporation Service Dept Newport MICRO CONTROLE S A 1791 Deere Ave Irvine CA 92606 Zone Industrielle Telephone 949 253 1694 45340 Beaune la Rolande FRANCE Telephone 800 222 6440 x31694 Telephone 33 02 38 40 51 56 Asia Newport Opto Electronics Technologies 253 Aidu Road Bld 3 Fir 3 Sec C Shanghai 200131 China Telephone 86 21 5046 2300 Fax 86 21 5046 2323 Newport Corporation Calling Procedure If there are any defects in material or workmanship or a failure to meet specifications
7. The 841 P USB automatically clears and recalculates the statistics at the end of each sample period unless you manually stop it Total Duration Continuous Sets the time period for the value entered above Period units Periods To make the statistics stop after one sample Weeks period select 1 and Period Days Minimum is second Hours Minutes Seconds Time Stamp Yes To have a time stamp appear with the data and No No go directly to the exit mode select yes by pressing the down arrow key until Yes appears on the screen then press the right arrow key Selecting Yes writes a time stamp with each data point This is a relative time stamp that always begins with zero 2 3 2 3 Corrections The user can apply one Multiplier or Correction Factor and one Offset to the detector reading For Low Power Detectors correction factors are used when operating at a non standard wavelength as per above However when using a High Power Detector correction factors are most useful when sampling a percentage of a powerful laser beam or correcting for absorption along an optical path The Status menu displays the values of correction factors that are being applied to the measurements To activate the correction factor select Corrections in the Settings Menu and then select Multiplier or Offset A dialog box opens where you enter the correction value in percentage or as an absolute value This number will
8. measurement ACK r r n9 793354 through the serial port e O1 r r n ANT Turns the anticipation ON ON by default amp return caracters ACK r r n ACK ANF Turns the anticipation OFF ACK r r n CFT Turns the power correction ON ON by default ACK r r n CFF Turns the power correction OFF ACK r r n AOB Modifies the analog output voltage value FAOB 8 ACK r r n characters Example AOB1 00E 01 The maximum value of the analog display 2 05 volts is 10 watts AOD Sets an analog output delay from 1s to 7s for a return to UV ACK r r n after an energy measurement Default 0 no return to zero after an energy measurement Example AOD2 00E 00 The delay is 2 seconds RST Resets the device de SOU Sets the zero offset ACK r r n KPA Returns the character string ACK ACK r r n PWC Wavelength correction value 5 characters ACK r r n Example PWC01064 selects the wavelength 1064 nm TEE Modifies the trigger level in energy mode 8 characters ACK r r n Example TLC2 00E 02 selects a Trig Level of 0 002 Joules NAM _ Returns the model of the head to the serial port UPSSN 400W H9 r r n VER Returns the name of the software to the serial port Version 1 14 r r n F01 Returns information about current status Version t3 tName t All field are separate by a TAB character Mt UPS5N 400W H9 tWa
9. the detector When the 841 P USB receives the associated command it subtracts the power reading on all its internal hardware scales Subsequent measurements will be relative to this zero power level Use this function once your power meter has achieved thermal equilibrium to ensure accurate measurements For instructions on the proper way to adjust the offset to zero your detector see section 2 2 Making a Measurement 2 3 3 3 Acquire Data This option allows you the choice of saving raw data only statistics only or both raw data and statistics When you select Start Saving Raw Data a dialog box appears Type in the filename that you choose then select save The 841 P USB begins storing raw data according to your Data Sampling settings see section 2 3 2 2 and Table 2 2 If you will be putting the information into a spreadsheet use the Save Both option All the raw data will be at the top of the file while all the statistical information will be at the bottom of each period The Stop Saving command stops the data recording but the 841 P USB will continue to provide measurements to the display 2 3 3 4 Statistics Select Start to start collecting statistics when stopped or to restart them when already in progress Select Stop to freeze the statistics The default statistics state is stopped 2 3 3 5 Send Serial Command This item opens a dialog box Enter a command and click OK to send it to the 841 P USB Only certain command
10. will allow you to reload the correction factor 2 3 2 2 Data Sampling Settings The 841 P USB can display a complete statistical analysis of power or energy measurements The Data Sampling menu is used to set up the data sampling parameters for calculating the Statistics Use the sample rate sample period and total duration to do the statistics You can set the 841 P USB either to calculate the statistics for a single sample and stop or to repeat continuously Take data for a few seconds or a few weeks You have the flexibility to handle any application from analyzing a single short pulse with high resolution to sampling performance over a period of months To select your own sample period and the time stamp click Data Sampling A dialog box appears Enter the sample period or set the time stamp To save all the data sampling settings click Save The statistical parameters that are calculated are listed in Table 2 1 12 Table 2 1 Statistical Parameters Statistical Parameters Power Energy Definition Maximum value Y Y Highest value in the sample period Emax OY Phas Minimum value Y Y Lowest value in the sample period Emin OY Pmin Average value y Y Rolling average of values in the sample Eayg Or Pavg Standard Deviation Y v A measure of the spread of the data around the average RMS stability y Y Root mean square stability represents the standard deviation as a percent of the a
11. 0 Connector type Female 1 8 jack 3 Detector Input Connector The 841 P USB uses a DB 15 female connector to mate with the detector heads 2 System Operation 2 1 Getting Started First you have to install the 841 P USB software on your computer along with the USB drivers they are found on the CD included Until the COM port is chosen all the other menu options are grayed out To start you must tell the 841 P USB software which port the 841 P USB will use To link the 841 P USB to the COM port click Ctrl Communication Connect A dialog box appears so that you can select the appropriate serial port COM 1 COM 2 etc Once you have selected a port click OK Now you are ready to adjust the settings 2 2 Making a Measurement This section will show you the fastest way of making a laser power and energy measurement with the 841 P USB and a Newport 818P Series High Power or 818 Series Low Power Detector The 841 P USB Virtual Power Meter automatically recognizes all Newport low power and high power detectors terminated with a 15 pin DB15 connector All calibration and technical data required for optimum operation of the detector will be automatically downloaded from the EEPROM in the DB15 connector This data includes sensitivity model serial number version wavelength correction factors and time response The 841 P USB must be disconnected from the PC before connecting a new detector to it in order to prevent any loss of
12. B 9 To reset the zero wait until the reading has stabilized and select Zero Offset in the Ctrl Control menu You are now ready to make an accurate measurement Low Power zeroing 10 To set a Low Power Detector to zero first put the cover on your photodiode and then select Zero Offset in the Ctrl Control menu The 841 P USB passes through all the scales to determine the zero diode for each scale The hourglass disappears when the meter has determined the zero diode NOTES Refer to specific power detector documentation for complete installation and operating instructions The 818P series High Power Detectors are thermal sensors that are sensitive to temperature variations For high precision measurements it is recommended to Allow the power detector temperature to stabilize before zeroing the 841 P USB Do not touch the detector head when handling the power detector Touch only the stand Avoid forced airflow or drafts around the detector 11 Apply the laser beam to the detector head 12 The laser beam average power or energy is displayed in three ways for your convenience a Digitally for real time measurement b Ona histogram to allow the laser beam s long term stability to be evaluated c Ona digital needle for laser tuning 2 3 Top Level Menu Structure This section describes in detail the first group of menu functions essential to the 841 P USB operation Refer to Figure 2 1 for a schemati
13. SS FOR A PARTICULAR USE NEWPORT CORPORATION SHALL NOT BE LIABLE FOR ANY INDIRECT SPECIAL OR CONSEQUENTIAL DAMAGES RESULTING FROM THE PURCHASE OR USE OF ITS PRODUCTS First printing 2004 2004 by Newport Corporation Irvine CA All rights reserved No part of this manual may be reproduced or copied without the prior written approval of Newport Corporation This manual has been provided for information only and product specifications are subject to change without notice Any change will be reflected in future printings Newport Corporation 1791 Deere Avenue Irvine CA 92606 USA P N 41484 01 Rev K Declaration of Conformity We declare that the accompanying product the model 841 P USB identified with the C mark meets the intent of the Electromagnetic Compatibility Directive 2004 108 EC Manufacturer s Name Newport Corporation Manufacturer s Address 1791 Deere Avenue Irvine CA 92606 USA Type of Equipment Laser Power Energy Meter Model No 841 P USB Year of test amp manufacture 2011 Standard s to which Conformity is declared BS EN 61326 1 2006 Electrical equipment for measurement control and laboratory use Basic Immunity Requirements CISPR11 2009 A1 2010 Class A Group 1 radiated and conducted emission limits Criteria CISPR 11 2009 Industrial scientific and medical equipment Radio Class A Al 2010 frequency disturbance characteristics Limits and methods of measurement EN 61000 4 2
14. Virtual Optical Power Meter 841 P USB Users Manual lt Q Newport Experience Solutions Warranty Newport Corporation warrants that this product will be free from defects in material and workmanship and will comply with Newport s published specifications at the time of sale for a period of one year from date of shipment If found to be defective during the warranty period the product will either be repaired or replaced at Newport s option To exercise this warranty write or call your local Newport office or representative or contact Newport headquarters in Irvine California You will be given prompt assistance and return instructions Send the product freight prepaid to the indicated service facility Repairs will be made and the instrument returned freight prepaid Repaired products are warranted for the remainder of the original warranty period or 90 days whichever is longer Limitation of Warranty The above warranties do not apply to products which have been repaired or modified without Newport s written approval or products subjected to unusual physical thermal or electrical stress improper installation misuse abuse accident or negligence in use storage transportation or handling This warranty also does not apply to fuses batteries or damage from battery leakage THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNE
15. a Displays Real time Histogram Tuning Needle Statistics User Input Correction Factors 1 multiplier and 1 offset 7 digits floating point Analog Output 0 2 05 Volt user defined full scale 1 Weight 0 12 kg Dimensions L x W x H mm 91x57x26 1 4 Interfaces Side B Side A Side B 0 Figure 1 1 841 P USB Interfaces 1 USB Interface Connector This interface allows remote control and data transfers between the 841 P USB and a computer that has a USB communication port 2 Analog Output The analog output is a voltage that can be used to monitor average power or energy by using external equipment such as an oscilloscope a chart recorder a computer with an analog interface a voltmeter etc This should be terminated into 1 MQ or greater impedance The user must enter the maximum value in the Settings SET Max Analog Out Range menu see section 2 3 2 9 This value is the value at which the analog output is equal to 2 05 V This will provide the best signal to noise ratio The measured power or energy is then related to the output voltage and to the selected range according to the following equation Voutput 2 05 x Power or Energy Max Analog Out Range For example with a 10 W Max Analog Out Range 2 05 V corresponds to 10 Watts 1 025 V corresponds to 5 Watts Specifications of the analog output Maximum output voltage 2 05 V Output impedance 274
16. analog output Save As Default Layout Saves the current layout of the windows They will appear that way on the subsequent software startups Save and Load User Settings The 841 P USB can remember and recall any number of settings You can share the 841 P USB without the hassle of having to re enter your settings As an alternative you can program it so that you can easily switch between different measurement applications without having to re enter your settings This option is activated under the Save Settings or Load settings menu items When you select Settings a dialog box appears so that you can save your settings to a file Give the settings a file name and type To use established settings select Load Settings When the dialog box appears select the file Ctrl Menu EZ COM30 PC Link 2 00 18 o s Ioj xj Display Settings Ctrl Help se y J Communication Zero Offset 918D UY 0D3 Acquire Data gt S N 10060 Statistics gt Send Serial Command Connected 00 04 16 Figure 2 10 Control menu structure 2 3 3 1 Communication The communication item is mostly used to Connect to the 841 P USB after starting software To use the COM port for another application without closing the software click Ctrl Communication Disconnect 2 3 3 2 Zero Offset This feature resets the zero reading level to compensate for electronic offsets in the monitor and thermal noise in the environment of
17. arranged as soon as possible 1 3 Specifications The following specifications are based on a one year calibration cycle an operating temperature of 18 C to 28 C 64 F to 82 F and a relative humidity not exceeding 80 Power Specifications Power Range 1 nW to 10 kW Physical Scale 2V 15 mV Virtual Power Scales with 818 or 918D series detectors 3 nW 10 nW 30 nW 100 nW 300 nW 1 uW 3 uW 10 uW 30 uW 100 pW 300 uW 1 mW 3 mW 10 mW 30 mW 100 mW 300 mW 1 W 3 W Virtual Power Scales with 818P detectors 300 uW 1 mW 3 mW 10 mW 30 mW 100 mW 300 mW 1 W 3 W 10 W 30 W 100 W 300 W 1 kW 3 kW 10 kW Resolution digital Full Scale 8388608 23 bit Meter Accuracy 0 5 5 uV full scale Response Time accelerated ae with 818P series detectors Sampling Frequency 10 Hz Energy Specifications Energy Mode Energy Range 10 mJ to 20 kJ Virtual Energy Scales 3mJ 10mJ 30 mJ 100 mJ 300 mJ 1J 3J 10 J 30 J 100 J 300 J 1 kJ 3 kJ 10 kJ 30 kJ Resolution digital 2nV Accuracy 1 0 Default Trigger Level 250 mJ Software Trigger Level User defined in Joules Repetition Frequency Supports all energy mode detectors Statistics Current value Max Min Average Std Dev RMS stability PTP stability Repetition Rate Avg Power General Specifications 3 Hz numeric display Pep Rate 10 Hz graphic Displays Dat
18. c view of the menu structure The menus differ depending on the type of detector that is currently being used The Display menu lets you view the status and your measurement in various ways Use the Settings menu during setup to select the best parameters for the measurement task at hand These functions provide the flexibility needed to accommodate a wide variety of measurement conditions The more active controls you are likely to use during your measurements are in the Ctrl menu They are described in Section 2 3 3 EZ COM30 PC Link 2 00 18 0f x Display Settings Ctrl Help Histogram Tuning Needle A Statistics Connected 00 00 59 200mm A Figure 2 1 The first group of 841 P USB menu functions 2 3 1 Display Menu The 841 P USB Display menu includes two options that allow you to send serial commands and check the status of the 841 P USB see Figure 2 1 You can switch from one option to the other without interfering with the measurement taking process 2 3 1 1 Histogram Histogram in Watt xj 0 000300 0 000150 Sl ii ii ee Se en Se rr eee eee eee ee j 1 60 85 11 0 13 5 16 0 Figure 2 2 Histogram Right click on the histogram to set the time period to view Set X Axis reset the display or select a scale Note that the Auto Scale on the histogram starts from the lowest scale and only does scale ups This is made to select the best scale for the user without frequent s
19. cale oscillations 2 3 1 2 Tuning Needle Tuning needle xj Tuning needle Options Options 180 0 jek ie 180 0 60 0 E thas 240 0 ya A Su Uf yw SELL Uf 300 0 e te 300 0 00 yo ten 300 0 No A at A pw Figure 2 3 Tuning Needle 2 options Right click on the Tuning Needle to select a scale The autoscale default is useful when the measurement variations are small because it will zoom on the best possible scale but will oscillate with large variations Use a fixed scale in this case 2 3 1 3 Status Status Figure 2 4 Status window example The Status window displays the detector name and various settings 2 3 1 4 Statistics Statistics Statistics Figure 2 5 Statistics in power and energy mode 10 The statistics window displays the current statistics See section 2 3 2 2 to set the data sampling parameters and to start and stop the statistics 2 3 2 Settings Menu Options in the Settings menu define user adjustable acquisition parameters All correction factors that will affect the reading can be easily programmed That could be for a beam sampler attenuator or other optics that require you to multiply and or add offsets to the detector reading You can also adjust for a wavelength other than the calibration wavelength A custom correction factor can also be keyed in Pre programmed wavelength correction factors dedicated to each detector head are also available and auto
20. data from the detector s EEPROM Quick power measurement procedure 1 Install the power or energy detector head on its optical stand 2 Slide the connector latch to the right to unlock the connector 3 Connect an 818P Series High Power Detector or 818 XX DB or 918D Series Low Power Detector into the 841 P USB using the DB 15 Detector Input Connector Connect the detector into the virtual meter BEFORE connecting the meter to your PC 4 Slide the latch to the left to lock the connector into place 5 Connect the USB cable to your computer 6 If you are using an 818 Series Low Power detector to obtain measurements in dBm select Settings Power Unit dBm 7 Remove the detector s protective cover and put the detector head into the laser beam path The entire laser beam must be within the sensor aperture Do not exceed maximum specified power or energy densities For the most accurate measurement spread the beam across 60 to 80 of the sensor area Adjusting the zero steps 8 and 9 If using an 818 or 918D Series Low Power Detector go to step 10 If using an 818P series High Power Detector proceed with step 8 8 Block off laser radiation to the detector The power read by the 841 P USB when no laser beam is incident on the detector may not be exactly zero This is due to the fact that the detector is not thermally stabilized OR there is a heat source in the field of view of the detector when you turned on the 841 P US
21. elay SO OOSA d Rep Rate must be more than three times the time constant of the detector Please refer to the instruction manual for the specific power detector you are using 16 Allow at least 2 laser pulses for the auto scale to select the optimal scale for your measurement This command is a toggle so a checkmark indicates when it is on Select it again to turn it off The default is off Keep in mind that the 818P Series High Power detectors are optimized to sustain high average power not high peak energy Always keep the energy density below the maximum energy density quoted in the manual for that specific detector The single pulse energy measured in Energy Mode is precise to 5 of the power measurement calibration This is larger than the uncertainty in the power measurement typically 2 5 because the energy calibration is computed from the power measurement calibration 2 3 2 6 Trig Level The Trigger Level is only used if a power detector head is used in Single Pulse Energy Energy mode mode see Section 2 3 3 4 This option allows the user to change the Trigger Level in absolute values This proves to be especially useful in noisy environments To change the Trigger Level value access the dialog box by selecting Trig Level from the Settings menu and enter the desired number in absolute value The 841 P USB will not detect pulses with a value under the Trig level The value of the Trigger level is shown in t
22. gnetic compatibility difficulties due to conducted as well as radiated disturbances SYMBOLS The following international symbols are used in this manual A Refer to the manual for specific Warning or Caution information to avoid any damage to the product DC Direct Current Waste Electrical and Electronic Equipment WEEE EA Figure 1 1 WEEE Directive Symbol This symbol on the product or on its packaging indicates that this product must not be disposed of with regular waste Instead it is the user responsibility to dispose of waste equipment according to the local laws The separate collection and recycling of the waste equipment at the time of disposal will help to conserve natural resources and ensure that it is recycled in a manner that protects human health and the environment For information about where the user can drop off the waste equipment for recycling please contact your local Newport Corporation representative vi Table of Contents Warranty i Technical Support Contacts iii Safety Information iv Waste Electrical and Electronic Equipment WEEEB v 1 General Information 1 Fl Introduction entnte aaa oe a e s est etais 1 12 Upa iia 1 1 3 Sp cifications niiii a eaa a i eis 2 LA amter ace Sennin a E S 3 2 System Operation 5 2 1 EA A he ea E a AE A A lal 5 2 2 Makin a Mes 5 2 3 Top Level Menu Structure seseeeeseeessesesseesresressersrersreseeserssreses 7 22020
23. he status menu confirming that the Trigger level is activated to a specific user level Selecting a high value for the trigger level may cause problems with the detection of widely varying energy values when in the Autoscale mode The Autoscale function uses the energy level of the last pulse to set the scale level Therefore it will not detect the next pulses if they are lower than the trigger level As a result the Autoscale may become caught on a high scale value To solve this problem select a lower value for the trig level then send the serial command SHI If you want to select the higher Scale send the serial command SLO To select the autoscale send the serial command FAS ERRATIC TRIGGERING For a few detector heads in electrically noisy environments it is possible that the 841 P USB will inadvertently trigger on the noise In that case increase the trigger level 2 3 2 7 Anticipation Thermal power detectors are inherently slow The 841 P USB uses an algorithm to significantly accelerate the response It is called anticipation By default this option is enabled The reasons for disabling the anticipation are to slow down the response and to lower the noise level Anticipation is not used in energy mode 2 3 2 8 Attenuator Some low power detectors come with an attenuator for which there is an attenuation factor programmed in the detector EEPROM This menu item makes it a simple operation to enable or disable the a
24. ill be the same but the 841 P USB gives you the flexibility for any application For example with the 841 P USB you can see 5 minute averages of your laser performance as you check it during the day and have it stop and hold the last 5 minutes worth of statistics after 20 hours Data Sampling E 10 per second e fi 0 a Minutes y i Continuous hd Time Stamp Y N No y Sample Rate Sample Period Total Duration Figure 2 7 Data sampling window Table 2 2 Data Sampling Parameters E PARAMETER Choices Description Default Sample Rate 10Hzto1 Sets the number of points measurements per 10 Power per hour second 10 per second per second per 10 seconds 1 per minute 1 per 10 minutes 1 per hour Sample Period Integer The time over which samples are to be averaged 10 Power 1 to Sets the number of samples used in the average 500 1000000000 and standard deviation for example for each Energy average to be based on 5 minutes of data set to 5 minutes Sample period Second Sets the time period for the value entered above Minute units Power 14 Minute Hour Day Week Total Duration Integer The time period for which samples are reported 1 1 to to the display and output Select a time period 1000000000 or a number of points for example report statistics for 24 hours Often the total duration and sample period will be the same
25. matically loaded from the detector EEPROM Data sampling and trigger level as well as the commands for saving and loading your settings are also found in the Settings menu For more information on wavelength correction see Wavelength Setting immediately below Z3 COM30 PC Link 2 00 18 e 6 10 x Display Settings Ctrl Help Wavelength gt Data Sampling Corrections gt Power Unit gt Energy Mode Trig Level Anticipation Attenuator Max Analog Out Range Analog Out Delay Save 4s Default Layout Save Settings Load Settings Connected 00 03 17 200 nm hi Figure 2 6 Settings menu 2 3 2 1 Wavelength Setting Use the Wavelength menu to select the proper wavelength at which the detector is to be used It applies a correction to adjust for the variation in responsivity at different wavelengths When a new detector is connected to the meter and the application has been closed and re opened the calibration wavelength is the default selection The checkmark beside the wavelength clearly shows the current selection To change the wavelength select an appropriate wavelength from the Wavelength menu The 841 P USB only allows you to choose values that fall within the detector s range If you select or enter a value that is not valid an error message appears and the 841 P USB automatically selects the default value The default wavelength is typically either 980 nm or 1064 nm
26. nergy Mode is not available E03 N A E04 The selected wavelength correction factor is not valid E05 The connector is not connected E06 ___ Attenuator not available Communication Settings Bits per second 57600 Data bits 8 Parity None Stop bits 1 Flow control None 24 4 USB Installation and Upgrades The 841 P USB has a USB type B port When connected to a PC it emulates a standard serial port This means that it is possible to connect many 841 P USB meters on one computer without tying up the ordinary serial ports while keeping a simple interface for which designing software is easy The 841 P USB functions using the USB port power only Installation for Windows Plug the 841 P USB into a USB port on the PC If the PC supports USB 1 1 Windows detects the new device and prompts you for the software drivers A window will open that says Found New Hardware USB Device and after several seconds to a minute the Found New Hardware Wizard will appear Insert the Newport Software CD ROM if not done already For Windows 2000 XP or Vista Cancel the wizard and execute the Auto installer USB driver installer r2 in the USB Driver folder from the CD ROM Please note that old monitor without the R2 at the end of the product name needs a different USB drivers which are available on our web site They do not support Windows VISTA unless noted on our web site At the end of this proce
27. rformance from the 841 P USB we recommend that you read this manual carefully The 841 P USB is a microprocessor based power meter that uses the latest technology to provide a multitude of options in a user friendly environment It is compatible with Newport s 818 Series Low Power and the 818P Series High Power Detectors It is a complete power meter providing the user with everything from statistical analyses to data logging Moreover it can be updated over the internet by connecting to a personal computer The CD that came with this meter contains an executable file that will transform your PC screen into a virtual 841 P USB power meter See Chapter 2 for instructions on getting started Easy software upgrades Keep in touch with the latest improvements to our user friendly software You can download the latest software versions anytime from our website www newport com and install it on the 841 P USB with the USB interface You will find all the necessary information on downloading and upgrading in Chapter 4 1 2 Unpacking Each Newport 841 P USB is thoroughly tested and calibrated prior to shipment Visually inspect your 841 P USB unit after removing it from the shipping container If you see any damage retain all packaging materials and shipping receipts Any damage claim should be made promptly to the transportation company Notify the nearest Newport representative concerning the claim so that any repair or replacement can be
28. s its end of life Breaking the calibration seal or opening the monitor will void the solo warranty The complete Monitor contains 1 Monitor 1 USB cable 1 Instruction manual 1 Calibration certificate 1 Software cdrom 6 1 1 2 Separation Paper Manual and certificate Plastic Monitor side enclosure Wires USB cable Printed circuit board inside the monitor Aluminum Monitor enclosure 28 6 1 1 3 Dismantling procedure Opening the monitor Aia Enclosure Remove screws Nut Plastic Protectors Remove Screws Electronic PCB inside Service Form XX Newport Corporation U S A Office 800 222 6440 FAX 949 253 1479 Newport Name Return Authorization Please obtain RA prior to return of item Company Address Date Country Phone Number P O Number FAX Number Item s Being Returned Model Serial Description Reason for return of goods please list any specific problems 30 Notes Internal 200708 Rev K Newport Corporation Irvine California Evry and Beaune La Rolande France have all been certified compliant with ISO 9001 by the British Standards Institution Mountain View California is DNV certified
29. s will work with the software the other ones are there for the user who builds his own application The commands are listed in Section 3 and should only be used by an experienced user This item is rarely used 2 3 4 Help About These two items are helpful to check the software version About Application and the embedded firmware version About Device If you should need help or additional information on the 841 P USB or any Newport products do not hesitate to contact us We will be glad to help you 20 2 3 5 Shortcut buttons To access certain features with a single click instead of having to enter the menus the 841 P USB software has 8 shortcut buttons on its main window From left to right those buttons access Ctrl Zero Offset Display Histogram Display Tuning Needle Display Statistics Display Status Settings Data Sampling Ctrl Communication Connect Ctrl Communication Disconnect MAXo Ae Bo Fs Fig 2 11 841 P USB Shortcut Buttons 3 Command Reference Commands Description Return Example ATT Turns the attenuator correction ON when available for the ACK rir n detector ATF Turns the attenuator correction OFF OFF by default ACK r r n CAU Sends the data points through the serial port at a frequency of 9 793354e 01 r r n 10 Hz 9 792939e 0 1 r r n CSU Ends the CAU mode ACK rir n CVU _ Returns a single measurement the current
30. ss a new serial COM port will be added to the list of communication ports It may be used as any other serial port You will need to know the COM port number to set up the serial connection to the 841 P USB Verify COM Port To verify the USB installation and find the COM port number click Start Settings Control Panel System Device Manager Instructions may vary a bit by operating system and version For Win2000 XP there is an additional step is there an extra step if so what is it or an extra click on my system it s an extra click between Control Panel and System Scroll down to Ports COM amp LPT and double click that line One of the options should be USB to Serial Port COM Note the COM port number You will need it for the communication menu of the PC 841 P USB 4 1 Free Software and Firmware Upgrades Keep up to date with the latest version of the 841 P USB software including new features and options As new and improved versions of the device s firmware are created it is in your best interest to update your 841 P USB The latest device firmware can be downloaded from the Newport website Access our website at www Newport com Go to the page on the 841 P USB Click on the name of the 841 P USB upgrade instructions file to open or download the instructions You may want to print out the instructions Find the file that corresponds to your 841 P USB and follow our simple easy to use instructions
31. the specific instructions for more information The user must wait for a while before handling these detectors after power is applied Surfaces of the detectors get very hot and there is a risk of injury if they are not allowed to cool down Note This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on it is suggested to try to correct the interference by taking one or more of the following steps e Reorient or relocate the receiving antenna e Increase the distance between the equipment and receiver e Connect the equipment to an outlet that is on a different circuit than the receiver e Consult the dealer or an experienced radio TV technician for help NOTE The 841 P USB is intended for use in an industrial laboratory environment Use of these products in other environments such as residential may result in electroma
32. ttenuator correction Since the calibration wavelengths are often different for the attenuator the user should always set the wavelength after enabling or disabling the attenuator correction 2 3 2 9 Set Max Analog Out Range The Set Max Analog Out Range setting allows you to choose the maximum voltage that will come from the 841 P USB The range of the output is 0 to 2 05 volts If the user selects 10 Watts as the maximum output range and if the 841 P USB measures 5 Watts the analog out is 1 025 volts To set the max analog out range from the Settings menu click Set Max Analog Out Range A dialog box appears so that you can enter a range 2 0475 for a measurement of 3 41 Cancel Figure 2 9 Dialog box to set the maximum analog output range The equation is V out Viet P read Pao where V out Output voltage of the 841 P USB V ref 2 0475 Volts Pread Power or Energy applied to the detector and is read by the 841 P USB P mo Power or Energy set by the user Set Max Analog Output 18 2 3 2 10 2 3 2 11 2 3 2 12 2 3 3 Note This function works in both power and energy modes Analog Out Delay By default in Energy Mode the analog output voltage reflects the last energy measurement until the next one The Analog Out Delay setting can be set from 1 to 7 seconds After that delay the analog output voltage will fall to OV It is useful to count the number of measured pulses using the
33. velength t10 64 tTrig Level t2 500000e O1 tMax Analog Output t2 047500e 00 tMode tO Offset tO MUL t1 0 00000e 00 tOFF t0 000000e 00 tPWCS tatus 65536 tMinScale t2 4 r r n 22 F02 Returns more information about current status Version t3 tName tUP55N 400W All field are separate by a TAB character t H9 tWavelength tlO64 tTrig Level t2 500000e 01 tMax Analog Output t2 047500e 00 tMode tO tOffset tO tMUL t1 0 0000e 00 tOF F t0 00 0000e 00 tPWCStatu s t65536 tMinScale t2 4 tLinearCorr t1 tAntici pation t1 tAttenuator MO MUL _ Modifies the multiplication factor 8 characters ACK r r n Example MUL1 00E 01 selects a multiplication factor of 10 OFF Modifies the offset 8 characters ACK r r n Example OFF 2 0E 00 selects a user offset of two watts CMW _ Turns the Energy Mode ON ACK r r n CMX Turns the Energy Mode OFF OFF by default ACK r r n SHI Make a physical scale down ACK r r n SLO Make a physical scale up ACK r r n EAS Turns the autoscale mode on ACKWinn Please note that you must type the exact number of characters or numerical values required Example AOB1 00E 01 has 8 characters numerical values Don t put any space between characters or numerical values You must type the star before the command 841 P USB Error Messages E01 Bad Command E02 __ E
34. verage rRMS STDA00 RMS SLDB100 Eave Pug PTP Stability Y Y Shows the spread between the highest and lowest point in the sample as a percent Es A PTP _ x100 PTP x100 Eiz avg Time Y Time elapsed since beginning the sample Repetition Rate y Frequency of pulses coming from the laser PRR To Activate the Statistics select Statistics from the Ctrl menu and then select Start in the submenu Statistics are stopped as a default The 841 P USB starts compiling statistics on your measurements as soon as the Statistics mode is activated Select Stop in the same submenu to turn the Statistics mode off When you stop the statistics the last values remain in the statistics display window for you to view later If you click Start again the 841 P USB will restart the statistics from zero The 841 P USB uses default sample parameters unless you set them yourself Selecting Statistics in the Display menu opens the Statistics window To Set the Data Sample Parameters select Data Sampling from the Settings menu The key points to remember are Sample Rate Measurement frequency e g 10 points second Sample Period Controls the amount of data for which the statistics are computed e g 5 minute or 1 day averages Total Duration Controls how long the 841 P USB will acquire data and or do statistics e g 1 period or 5 hours Often the Total Duration and Sample Period w

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