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Model 1928-C Power Meter Manual

1. 4 2 4 4 2 5 If the instrument is in Setup mode or in any configuration screens pressing the arrow keys will select different setup modes as displayed by the current screen Soft Keys Below the screen are a group of four keys Figure 20 Their function varies depending on the measurement mode or the setup screen They are designed to provide context sensitive functionality to the user The label displayed above each key indicates their function Figure 20 Soft keys Dedicated Keys Six dedicated function keys are at the bottom right portion of the front panel Figure 21 Each of these keys can be used for quick access to the given function Figure 21 Dedicated keys System Operation 35 Range Pressing this key reconfigures the Soft keys at the bottom of the screen as in Figure 22 From this screen the user has two options e One is to toggle Auto Manual Range mode This is accomplished by pressing the left most Soft key If the meter current configuration is Manual mode the left most Soft key is labeled Auto to allow the user to change the Range selection in Auto Range Mode This can be seen in Figure 22 where the range is 110 0 uW indicating a manual mode If the instrument is in Auto Range Mode the left most key is labeled Manual The user may return to the main screen by pressing the ESC key see Figure 23 e The other option is to press the right most Soft key which is labeled Conf
2. 9 9 Two common applications are natural extensions of the CW Integrate measurement mode 3 Pulse laser energy measurement using a thermopile detector 4 Energy from exposure over a period of time dosage E Input Optical Signal Vit Detector s Voltage Pulse 1 n E voat R A Displayed Signal Figure 63 Measuring Laser Pulse Energy with a Thermopile Thermopiles are often used to measure pulsed laser energy by integrating the response of the detector to the pulse Analog Output The 1928 C provides an analog output for signal monitoring The analog output is the actual amplified detector signal and is uncorrected for the effects of the detector s responsivity calibration and ZERO The analog output signal is a representation of what the meter sees at its input However the analog output signal may be filtered if the user selects the 5Hz filter see paragraph 4 2 5 Also the analog output signal is amplified and scaled to the selected analog output level see Table 5 The user can select the analog output level with a command PM ANALOG OUT see Section 8 3 The analog output maximum level corresponds to the maximum full scale input range the meter is set on For example if one selects the analog output level at 1 V and the meter is set on 250 mW maximum full scale input range the analog output signal will have a transfer function of 250 mW 1 V Therefore if the analog output is connected to an osc
3. Figure 50 Vertical chart with 1 measurement per line Figure 49 shows 100x 10 Avg which means that while painting a line the system looks at the previous 10 measurements It displays with white the minimum value in the 10 measurement list and with red the maximum value in the same list The user can change the number of measurements by selecting the Average soft key and then pressing the Right or Left Navigation keys to increase respectively decrease the number of measurements If one measurement is selected the chart color is white because the maximum and minimum per line are the same Figure 50 Due to one measurement display per line the chart speed increases If the Zoom soft key is pressed the user can zoom into the chart with the Up and Down Navigation keys System Operation 51 4 11 5 Analog Gauge The Analog Gauge display simulates a traditional analog gauge For enhanced ability to monitor the measurements this display mode provides users the capabilities of showing a maximum value and zooming in out around the present measured value It also supplements the analog gauge simulation with a large numeric display see Error Reference source not found for improved ability to read the measurements If the user applies any correction or zero offset settings the analog gauge and numeric display show the corrected measurements the actual detector uncorrected measurements and zero offset value are
4. LAMBDA n LAMBDA n MODE n MODE n Rn RWS_n RANGE n RANGE n RESP n Appendix C Legacy Commands Reference New Commands P P P P P P M ATT M ATT M ATTSN M AUTO M AUTO M CALDATE M CALTEMP M DETMODEL M DETSN M DS BUFfer M DS BUFfer M DS CLear M DS Count M DS ENable M DS ENable M DS GET M DS INTerval M DS INTerval M DS SIZE M DS SIZE M DS UNITs M FILTer M FILTer M Lambda M Lambda M MODE M Power M RANge M RESPonsivity Number of Parameters NONE NONE Function Selects if the attenuator s calibration data is included for power calculation Returns setting if attenuator data should or should not be used when calibrating the Optical Power Meter Gets the attenuator serial number Sets the Optical Power Meter ranging to manual or automatic Returns 1 if automatic Optical Power Meter ranging is selected Returns the calibration date of the detector Returns the temperature at which the calibration was performed Returns the model number of the detector Returns the serial number of the detector Set data store behavior select Return data store behavior select Clear data store Return data store count of items stored Set data store enable Return data store enable Return data store data 1 1 10 5 5 value range oldest 5 newest 5 Set data store interval Return data store interval Set
5. Remarks Argument enable PM DS GET Description Syntax Remarks Argument selection Enable Data Store Collection query PM DS ENable The PM DS ENable query returns the enabled status of the Data Store Type int See PM DS Enable for a description of the enable argument Description Retrieve Data Store data query PM DS GET num The PM DS GET command returns a number of measurements that have been collected in the Data Store Type Description string 1 returns the single value specified 1 10 returns values in the range from 1 10 5 returns the oldest 5 values same as 1 5 5 _ returns the newest 5 values Note depending on the number of data points requested there may be several read operations required on the USB interface 80 Communication Command Reference 8 3 3 36 8 3 3 37 8 3 3 38 PM DS INTerval Description Data Store Interval Select Syntax PM DS INTerval lt interval gt Parameters The parameter lt interval gt is of type lt number gt that is an integer The parameter represents the interval in milliseconds for storing one measurement in the data buffer Function This command sets the interval in milliseconds to be used for data storing For example if DSINT 100 and DSSIZE 100 it will take 100 x 100ms to fill the buffer Related Commands PM DS SIZE PM DS SIZE PM DS INTerval PM DS INTerval Description Data Store Interva
6. ERRors Description Error query Syntax ERRors Communication Command Reference 71 8 3 3 7 8 3 3 8 8 3 3 9 Remarks The ERRors query returns a single error number that has occurred since the last query This error is indicated by a number that corresponds to the type of error that occurred This command also clears the read error from the Error buffer Response Type Description Error code int Error code number per Appendix B 0 if no errors Related Commands ERRSTR ERRSTR Description Error string query Syntax ERRSTR Remarks The ERRSTR query returns a single error number along with the corresponding error text string that have occurred since the last error query Response Type Description Error code string Error code number and text for error code as text per Appendix B 0 if no errors Related Commands ERRors PM ANALOGFILTER Description Analog filter select command Syntax PM ANALOGFILTER value Remarks The PM ANALOGFILTER command selects the analog filter setting Argument Value Analog Filter Value 0 None 1 250 kHz 2 12 5 kHz 3 1 kHz 4 5 Hz Related Commands PM ANALOGFILTER PM ANALOGFILTER Description Analog filter query Syntax PM ANALOGFILTER Remarks The PM ANALOGFILTER query returns an integer indicating the present analog filter setting 72 Communication Command Reference 8 3 3 10 8 3 3 11 8 3 3 12 Argument Value Analog Filter Value 0 None 1 250 kHz 2 1
7. Introduction The 1928 C Optical Power Meter is designed to provide a powerful combination of features to measure optical power and energy of near monochromatic or monochromatic sources The instrument is powered by an AC wall plug Use of the extensive measurement modes and features has been simplified with an intuitive menu driven structure that provides quick access to all modes features and settings Some of the prominent specifications and features that will simplify your calibrated measurement applications are the following e Compatibility with Photodiode Thermopile and Pyroelectric detectors Low Power Semiconductor Family High Power Thermopile Family Energy Pyroelectric Family PMT GaN PbS PbSe and HgCdZnTe e Measurement rate up to 4 kHz with internal signal sampling rate of 250 kHz e Multiple measurement modes for power and energy measurements Single Continuous Integrated and Peak to Peak Software suite including LabVIEW drivers and Windows application 250 000 internal data point storage External USB flash memory compatibility USB Device interface The full color TFT 4 LCD renders excellent visibility both with the naked eye and laser goggles for single screen rendering of plotted and enumerated results Measurements can be displayed in Watts Joules Amperes Volts dBm dB Sun or relative units either directly or as relative ratio measurements from present or stored values Statistical cap
8. 38 Accessing the Trigger Setup SCTeeM 00 ceeececsseceteceteeeeseeeeeeneeens 41 Predefined color schemes s ssssseseesesseseesesseseesseseesesseseessseesessesee 42 SCtUP SETS v5 hed an Ra E R A A N A 43 System Settings screen ss ssesessseesseseesseesseserssressesstssressessrssresseese 43 A pout SOT CCI ects ens a nE aa E R 43 Statistics scree e niee anan at a a a aaia 44 Graph SERGI tec n e uted e a say E Boas Aa a 45 Math field nerie a E E A E A RAER 45 Math configuration sereen s sessseessesersseessessssrosseesesresseessesressee 46 Measurement SettidgS sirssiicsiinnrini iinr 46 Correction Settings eisene a a A R RR 47 xiv Preface Figure 44 M d sel ctiom serei osonu anan a a alten 47 Figure 45 The Numeric displayen eniinn anaa s 47 Figure 46 Analog Batme anaon penn oirne a ar EARE EMEA rR RT a REES 48 Figure 47 Auto Zoomen a a a e E E 48 Figure 48 Analog Needle display nsnnnssssossesesessessesssssosseesessresseessesresseesse 49 Figure 49 Vertical chart with 10 measurements per line ee eeeeeeeeeeeeeeee 50 Figure 50 Vertical chart with 1 measurement per line eee eeeeeeeereeeeeees 50 Figure 51 Analog Gauge IDs Aye oss ecacceascecadsk Coates Vinves ie enacepes teak eeeocmadeaa te 51 Figure 52 Analog Gauge Display with Maximum Value market 51 Figure 53 Analog Gauge Display at 50x ZOOM ceceseeseeeeceeeceseeneeeneeeeeees 51 Figure 54 Measuring Laser Pulse Energy via a
9. NONE Returns an integer indicating the selected units 94 PM ZEROSTOre NONE Sets the zeroing value with the present reading 94 PM ZEROVALue 1 Sets the zeroing value 94 PM ZEROVA Lue NONE Gets the zeroing value 95 Table 3 Tree Level Commands Queries Summary 8 3 2 Display Commands 8 3 2 1 DISP BRIGHT Description Display brightness command Syntax BRIGHT brightness Remarks The BRIGHT command controls the brightness of the instrument display Argument Type Description Brightness int Brightness in levels from 0 to 7 Related Commands DISP BRIGHT 8 3 2 2 DISP BRIGHT Description Display brightness query Syntax DISP BRIGHT Remarks The BRIGHT query returns the display brightness setting Response Type Description Brightness int Display brightness in levels from 0 to 7 Related Commands DISP BRIGHT Communication Command Reference 69 8 3 3 8 3 3 1 8 3 3 2 8 3 3 3 Optical Power Meter Commands IDN Description Identification Query Syntax IDN Parameters None Function Remarks This query will cause the Optical Power Meter to return an identification string Model Firmware Firmware Conmolgr name version date Serial ee NE S aN eee NEWPORT XXXX vYYY mm dd yy SNZZZZ Examples NEWPORT 1928 C v2 0 0 11 07 06 SN0001 RCL Description Recall Configuration Settings Syntax RCL bin Remarks The RCL command restores the power meter to the setup state saved in its non volatile flash memory Argument Value Descript
10. This setting allows the user to change the measurement mode The available modes are as follows e Continuous Wave Continuous Run CW Cont 40 System Operation 4 3 1 7 4 3 1 8 4 3 1 9 4 3 2 Continuous Wave Single Shot CW Single Continuous Wave Integral CW Integ Peak to Peak Continuous Run Pk Pk Cont Peak to Peak Single Shot Pk Pk Single Pulse Mode Continuous Run Pulse Cont Pulse Mode Single Shot Pulse Single RMS Measurements RMS Refer to Section 5 Performing Basic Measurements for detailed information regarding these modes Spot Size This setting allows users to change the spot size The default spot size is set to be same as the detector size The spot size can be modified by navigating the cursor to this setting and pressing the Setup Enter key The value then becomes editable each digit in the value can be changed by pressing Up Down arrow keys and different digits can be selected by pressing Left Right arrow keys The desired value can be accepted by pressing Setup Enter key Number of Digits Setting The default number of digits displayed by 1928 C is 4 To change this setting bring the cursor on top of the Num Digits field Hit the Enter key A drop down menu appears with the option of 3 4 or 5 digits Select the desired number of digits and hit Enter Offset Field On the right column of the Measurement Settings the unit displays the Offset stored when the user hits the Zero dedi
11. and the string is terminated by another double quote A double quote may be embedded within the string by using two double quotes together Example this string contains a double quote All characters within the two outer double quotes are considered part of the string It is an error if the string does not terminate with a double quote The string cannot contain the lt CR gt ASCII decimal 13 lt LF gt ASCII decimal 10 or End or Identify characters 2 lt string gt defined using single quotes This form is similar to double quoted string A single quote indicates that a string follows and the string is terminated by another single quote A single quote may be embedded within the string by using two single quotes together Example this string contains a single quote All characters within the two outer single quotes are considered part of the string It is an error if the string does not terminate with a single quote The string cannot contain the lt CR gt ASCII decimal 13 lt LF gt ASCII decimal 10 or End or Identify characters 3 lt string gt defined using no quotes 114 Appendix A 12 2 All strings using this format must start with an alphabetic character A through Z a through z All other characters must be either alphabetic digit 0 through 9 or the _ character Any other character will delimit the string Some examples are shown below Sent this is a string Interp
12. key to set the measurement wavelength to the desired value e Cover or otherwise block the light source being measured turn Zero on Immediately upon entering the RMS mode the meter will begin to acquire and calculate RMS value of the data The display value may reflect the RMS of noise due to ambient temperature fluctuations when using the 818P detectors or light fluctuations when using the 918D detectors e Uncover or trigger the source The displayed value should now reflect the detector signal RMS value e The RMS value is calculated based on data acquired over a one second time period The formula used to calculate the RMS value is given below Where x is the signal measured n is the number of samples acquired over a one second period and y is the RMS value NOTE This process assumes that ambient signals are not changing between the moments when the user zeros the display and when the measurement is made 60 Performing Basic Measurements This page is intentionally left blank 6 1 6 2 Software Application Overview The 1928 C has a USB connector on the rear panel of the unit that is used to connect to a computer for use with this application Provided on the CD that comes with the unit is an installation for this software application The installation installs the USB drivers that are required to use USB communication The software is designed to allow the user to remotely control basic functions of
13. reconfigures the Soft keys at the bottom of the screen as in Figure 27 Counting from left to right the first key applies only the analog filter to the detector signal the second applies only the digital filter and the third applies both filters When the filters are selected the corresponding label above the soft key has a highlighted background and the filter name is displayed in the upper left corner Figure25 Mode selection screen 400 nm Figure 26 Measurement is on hold CW Cont ge Auto 400 nm Figure 27 Filter selection screen System Operation 37 The fourth Soft key is used for filter a ose OM configuration When selected a screen as in Figure 28 is displayed Using the Navigation Enter keys the user can select the desired analog and digital filters If Enter key is pressed after making the selection the new analog and digital filter settings are applied and the instrument goes back to the main screen If ESC key is pressed instead the new settings are ignored and the instrument goes back to the main screen The digital filter values can be edited Figure 29 When one of the digital filter values is selected the right most soft key becomes Edit Value Pressing this Soft key displays a cursor on top of the first digit of the edited filter value The Navigation Up Down keys modify the digit while the Left Right keys move the cursor to the next digit When finished press the Enter key to
14. store the new digital filter value and press Enter again to select the new value and exit the Filter configuration screen Figure 29 Digital Filter editing Lambda A Key The Lambda A key displays the Default Wavelengths Default and Custom Wavelengths 3 screen Figure 30 This screen allows the user to choose a default wavelength or a custom wavelength for the measurement in progress See Section 4 5 for more details Figure 30 Wavelengths screen 38 System Operation 4 3 4 3 1 4 3 1 1 4 3 1 2 Set Zero Offset Zero Key The Zero Offset key or short Zero key is used to temporarily zero the instrument for the measurement in progress When the user presses this key the instrument takes the displayed numeric value as offset and subtracts it from all the subsequent measurements When the instrument is zeroed the offset value is displayed on the main screen above the numeric value see Figure 31 Figure 31 Zero Selection The Zero key toggles the offset on or off The ESC key has no effect on the Zero function Measurement Settings The Measurement Settings screen has Measurement Settings dual functionality Detector 818P 001 12 e One is the convenience the user has S N 173952 t h ll the measurement Det temp No Therm 0 a ange a E MEASUTEME Responsivity 1 959E 1 settings within one screen Ref val e The other is information presented to the user about the detector used From the main
15. 0 0 105 9 10 4 Energy Detector Temperature Effects eee 105 9 10 5 Ambient and Stray Light cc cesceseeeeeeeteeeneees 105 9 10 6 Signal PIER Gsicc45cs sczavayedeas tates aigeeattasteadeteaaaedaes artes 106 9 11 Common Measurement Errors zcisi c0cshaveagsiscasteeasecneschel weaaventes 107 10 Troubleshooting 109 10 1 Power Supply Problems ssnsnnneseesseesseseessressessrssressessrssresseese 109 10 2 Analog Output Problems css vinaitiecates bee howidaiiecthven 109 10 3 Questions and ANSWETS cccccccsscccesscecesseeceseeeceseeecsseeeeeseeeees 109 xii Preface 11 Maintenance and Service La Enclos re Cleaning a 295 lt csfavis edt cadsesniaesd sasni II 2 Obtaining Strvite oct issidsndetiaity cadens eae WUD Service Formis eie ina a aE aE 12 Appendix A Syntax and Definitions 12 1 Definition of lt string gt esssessesessssessessrsssessessrssressessresees 12 2 Definition of lt number gt eseeeeesesssssssereesserrrssesrersssrresssrrees 13 Appendix B Error Messages 131 Introd cese n a iit 13 2 Command ErroT Snerten a a aaa ISe E BLL 0 H D a KOI NEEE E EEE E EE TRAP Deyi ce Errors naa a e A O a a N aE 14 Appendix C Legacy Commands Reference 15 Appendix D Sample Programs 15 1 Programming Sami plesssiccsncedeveasarsseesspnuids vedheinearendedeaacuiaess 1 S22 EE VATE Wa ater tena tian reteset tata AE EN 15 3 Microsoft Visual Basie siccccieiecs ssseees tetecsse divdecwe
16. 35 uW 2 1 5a Hint Press Setup to er p Hint Press Setup to enter measurement setup T Mah Statistics Math a Negative black and white b Positive black and white c Red screen Screen screen 2 1337 d Green screen e Blue screen f Color Blue screen Figure 34 Predefined color schemes System Operation 43 4 7 To change the display colors first press the Enter Setup key This will bring the Setup screen and reconfigure the Soft keys Figure 35 Pressing the System soft key will bring a secondary setup screen Navigate to the Color Selection to change the screen color Figure 36 Also navigate to the Brightness field and hit Enter to change the screen brightness The default value is 80 Press the Measure soft key to go back to the Measurement Settings screen or press ESC to go back to the main measurement screen Pressing the About soft key will bring another screen with information about the unit s firmware version serial number calibration date In addition the attached detector s data is displayed Figure 37 From here one can navigate back to the Measurement Settings or back to the System Settings USB Address MEESTER p 5 Wavelength Jetector 918D Range 110 0 LW S N SL OD3 10095 Range type Auto Det size 1 0000 cm Attenuator Off Ref val 0 0010 W Analog filter 5 Hz Offset 0 0000 W Digital filter Off Det temp 23 0 deg Units Watts Responsivity Mod
17. EA DETS Eaa ix Listof Pag bese aah in een e E DAR O E a tuna xiii BASH OL Tables ieuna ee a a a e E E xiv 1 Safety Precautions 15 1 1 Definitions and Symbols ou ceeeeseeseeeteceeeeeeeeeeeeenseenteeeees 15 1 1 1 General Warning or Caution cecceeeeseesseesteeeteeeees 15 ll 2 Electio SHOCK oisnie penini eel a e a 15 1 1 3 Protective Conductor Terminal 0 cc eeceeeseeeteeeteeeees 15 1 1 4 European Union CE Mark 0 cccceeceeceeeseeeteeeeteeeteenees 16 1 1 5 Alternating voltage symbol 0 eee eeceeceeseeeteeeteeeees 16 EEO ON et fates at at dal actean a a det causal ceae estan titnsa nate 16 EET OFF rne a e dua Ee a a ET avait E aes 16 VAS FUSES Moa a uae ai tew tenet Gatun aia eons dee 16 1 1 9 Frame or Chassis ites usc aacee ve vdnaes wacasicteuctie Maadiaaw venteouenet 17 1 1 10 USB Connector Symbol ai cssiunccsnneivendtanie eed 17 1 1 11 Waste Electrical and Electronic Equipment WEEE 17 1 2 Warnings and CamlOnsencsiiesscass wsdandsidinacdateorcelaviies eebenlinta caries 18 1 2 1 General Warnings rv sonst can ince siuta asus etohenaerca ase 18 1 2 2 General Cations ss JoassoacseN cate aeuaeotsnveedeg scoaenaws aessines 19 1 2 3 Summary of Warnings and Cautions 0 0 0 0 ceeeeeeeeees 19 3 Location of Labels scisissccr send inn a aa 20 WO Rear Panele crae a teeta ning E N E ance 20 2 General Information 21 21 Jntroduct n soina aaa aini 21 Bad Calibration aeaee eA E O E 22 23 Specifications v
18. P P P P Number of Parameters NONE Z o tri 65651515553 Z TI ZIZI I Z ZIZ 2 DAM Z mim m m m m j m ies Z Z t Function No Returns the digital ilter seting 7 Returns data store data 1 1 10 5 5 value range oldest 5 79 newest 5 Set data store interval Returns data store interval Saves the data store buffer to a WinCE compatible USB flash disk Sets the size of the Data Store buffer Returns the sizes of the Data Store buffer Selects the filtering operation no filtering analog filter digital 82 filter or analog and digital 00 o0 CO ajun inia ajala ami Lani Lene O 0 0 CO CO NI YI Returns the filtering operation no filtering analog filter digital filter or analog and digital Returns the maximum readable power in present range Selects the gain stage when making readings with the detector Returns the user reference value Gets the responsivity currently used for making power calculations 00 o0 00 WIWIN 3 87 87 Sets the user reference value for use in relative or dB readings as the present reading Disables or enables the acquisition of data KANININ INAR IRS o0 o0 o0 o0 00 o0 o0 o0 o0 o0 CO WINN N N Re ele o o x valea AA 05 68 Communication Command Reference Number of Page Name Parameters cunetion No PM UNITs 1 Selects the units for readings 93 PM UNITs
19. Power Meter Remote Interface Commands A complete listing of the commands supported by the 1928 C Optical Power Meter is provided below Command Overview There are two types of commands commands that cause the Optical Power Meter to take a desired action and queries that return a stored value or state of the instrument Queries must end with a question mark while commands may require parameter s to follow PM Lambda 810 For example the value 810 in the command PM Lambda 810 sets the wavelength to 810nm The table below summarizes all the commands and queries supported by the 1928 C Optical Power Meter The command query MUST contain all of the letters which are shown in upper case in this table The lower case letters shown with the commands are optional and may be used for clarity If any of the optional letters are used then all of the optional letters are required for the command The commands may be sent to the instrument in either upper or lower case or in any combination For example the following commands are equal PM Lambda 810 PM L 810 pm L 810 Pm L 810 COMMAND EXECUTION The controller interprets the commands in the order they are received and execute them sequentially If a set of commands have to be executed closer to each other these commands can be sent to the controller simultaneously by creating a command string with semicolon used as a command separator The command string length should not
20. Returns lt refval gt lt refval gt is of type lt number gt Related Commands PM REF STOre PM REF VALue PM REF STOre Description Reference Value Store Syntax PM REF STOre Parameters None Function This command takes the latest reading and stores it as a reference reading to be used when making relative linear and dB measurements The units of this value are the current units being used by the instrument Related Commands PM REF VALue PM REF VALue PM RESPonsivity Description Responsivity query Syntax PM RESP Remarks The PM RESP query returns the responsivity currently used in making power calculations Response Type Description Responsivity float Optical Power Meter responsivity Related Commands PM UNITS PM PWS Communication Command Reference 89 8 3 3 62 8 3 3 63 8 3 3 64 8 3 3 65 PM RUN Description Run command Syntax PM RUN mode Remarks The PM RUN command disables or enables the acquisition of data Argument Value Description Mode 0 Stop 1 Run Related Commands PM RUN PM MODE PM RUN Description Run query Syntax PM RUN Remarks The PM RUN query returns an integer indicating the present run mode Response Value Description Mode 0 Stopped 1 Running Related Commands PM RUN PM MODE PM SPOTSIZE Description Set detector spot size Syntax PM SPOTSIZE value Remarks This command sets the detector spot size By default the spot size is same as a detector s surf
21. benefits afforded under law in the Programs provided by Newport Corporation Newport shall retain full ownership of Intellectual Property Rights in and to all development process align or assembly technologies developed and other derivative work that may be developed by Newport Customer shall not challenge or cause any third party to challenge the rights of Newport Preservation of Secrecy and Confidentiality and Restrictions to Access Customer shall protect the Newport Programs and Related Materials as trade secrets of Newport and shall devote its best efforts to ensure that all its personnel protect the Newport Programs as trade secrets of Newport Corporation Customer shall not at any time disclose Newport s trade secrets to any other person firm organization or employee that does not need consistent with Customer s right of use hereunder to obtain access to the Newport Programs and Related Materials These restrictions shall not apply to information 1 generally known to the public or obtainable from public sources 2 readily apparent from the keyboard operations visual display or output reports of the Programs 3 previously in the possession of Customer or subsequently developed or acquired without reliance on the Newport Programs or 4 approved by Newport for release without restriction Service Information This section contains information regarding factory service for the source The user should not attempt any mainte
22. eid entcdenawats 32 4 22 ESC Ke Ysa nese ah a oe n ET 33 4 2 3 Navigation and Selection KeyS ccccccseesseeeteeeeeeeeees 33 AIDA SOM KEYS ote e A a A A E E 34 4 2 5 Dedicated Keyser merireitin a gay 34 4 3 Measurement Seta 2s scgisstecesciscagetaatacts shteaigvatdsccsaudewudaatocans 38 4 3 1 Changing the Measurement Settings eee 38 4 3 2 Detector ntormationccsvicoxlscutvce aeons ade acacenexs 40 AeA Treger Sep an ane as uatares e cau siaces eats remanent 41 4AT Trigger Start oeiia agne a e Aa EE aE 41 442 Trigger Stoper a a tae ER 41 AD Wavelength Setting s sesessseesseseesseessessrsseessessessresseessesressresse 42 4 6 Display Colher a R a aR 42 4T USB Address r a E A E os ae 43 ALS E e e 1 a O EE T 44 481 Graphe nia n E E E AEE ETE OA 45 4 9 ANA tHE UMIC HOTS 3 ac ccasdessceastmaya cs enanedteds seth danecoundeetaiass avveneoeeeees 45 4 10 Measurement Correction Settings 2 0 0 0 cccccceesceeeeereeeteeeeeees 46 4 11 Display MOd6Ss siccis totic cistesdeidadcnteauiuseddasasutdosauaeeiaen 47 4 11 1 Numeric IDTS AY ae seat tiasak cs Seakees oe seeats eecere Reece a puaeeees 47 4 11 2 Min Max Bat vvcstet casein eileen asda vas a na 48 411 3 Analog NCCU ccc sceictasssecaseiiacatansnn ork auu bodies 49 4 1 1 4 Vertical Chartes lrer nann na 50 4 115 Analog Gauges nean a a a ented 51 4 12 Optical Power Meter Firmware Upgrade Procedure 52 Performing Basic Measurements 53 Dil
23. instructions are intended only for recycling at the end of the product lifetime For troubleshooting or servicing users should contact the local Newport Corporation representative There are no user serviceable parts inside the equipment Attempting to self service the unit will void the warranty Disassembly instructions Figure 64 shows an exploded version of the 1928 C For recycling purposes only the disassembly steps are as follows 1 Make sure the unit power cord is removed 2 Remove any other cables detectors Analog Output monitor cables USB and ground cables Remove the bottom screws of the cover Remove the cover Remove all the screws on the rear panel Remove the rear panel pe a ee A Remove the screws and posts of each assembly and unplug each assembly from the enclosure oe Remove the front panel screws 9 Remove Assembly 1 from the front panel 126 Appendix E Cover Assembly 3 Assembly 2 Enclosure N Figure 64 Disassembled 1928 C Optical Power Meter a Rear Panel Assembly 1 Front Panel End User License Agreement for Embedded Software Components You have acquired a device DEVICE that includes software licensed by Newport Corporation Newport from an affiliate of Microsoft Corporation MS Those installed software products of MS origin as well as associated media printed materials and online or electronic documentation SOFTWARE a
24. measurement screen pressing the Setup Enter key causes the 1928 C to display the Figure 32 Measurement Settings Measurement Settings screen as in screen Figure 32 Changing the Measurement Settings Within the Measurement Settings screen the user can select the Wavelength Range Range Type Detector Attenuator Status Analog Filter Digital Filter Measurement Units Measurement Mode Spot Size and the Number of Digits displayed Wavelength Selection With the Navigation Selection keys bring the cursor on top of the Wavelength field Hit the Enter key A drop down menu appears with the custom wavelength values see Section 4 5 for more information about the wavelength custom values Select the desired wavelength and hit Enter Range Selection and Range Type Rng type The Range field has dual functionality System Operation 39 4 3 1 3 4 3 1 4 4 3 1 5 4 3 1 6 One is to display the current selected range whether it was selected by the user in Manual Range Mode or by the system in Auto Range Mode e The other is to allow the user to change the range With the Navigation Selection keys bring the cursor on top of the Range field Hit the Enter key A drop down menu appears with the available ranges in the selected units Select the desired range and hit Enter If the unit was in Auto Range mode once a range is selected here it will switch the system to Manual Range Mode To bring it back to Auto Range Mode
25. of the measured values on a time graph System Operation 45 4 8 1 4 9 The Statistics screen displays also the current measured value at the top of the right column Graph The Graph soft key displays the last 30 240 uW Zoom 1 Val 14 929 UW 10000 measurements on a time graph if Figure 39 Due to the sample time My Pi AN interval of 100us the graph duration Af i W T is 1 second The graph width is 270 pixels and because of that the system has to decimate the 10000 samples to fit them in this fixed a nn ee aes ot pixels Theretore the Cursor Zoom Zoom Sa graph might look choppy if the graph zoom is set on 1 Figure 399 Graph screen The user can zoom into the graph with the Soft keys Zoom and Zoom As the zoom changes the graph displays a finer picture of the measurements The zoom value is retained at the top of the screen Pressing the Zoom soft key will zoom in the graph 2 times the previous zoom value Pressing the Zoom soft key will zoom out 1 2 times the previous zoom value The maximum graph value is displayed in the upper left corner of the display If the Cursor soft key is pressed a vertical line cursor is displayed The user can direct the cursor left or right with the Navigation Keys to read the measured values on the graph The current value is displayed in the upper right corner and marked on the screen with a red dot Math Functions The Math function is displayed
26. on the math field at the upper right corner of the main measurement screen see Figure 40 To display the Math field the user must select the soft key labeled Math on this screen This in turn displays a math configuration screen see Figure 41 The Math function can be used to add subtract multiply or divide the current measurement Ch A with a reference Ref A in real time Figure 40 Math field Once in the Math configuration screen the user can use the Navigation keys to build a desired mathematical expression From the first column the user can select the first variable in the expression from 46 System Operation 4 10 the second column the operator and from the third column the second variable After making the selections the user can press Enter key to confirm the choices and to return to the main measurement screen Math Function Setup Figure 41 Math configuration screen The Ref value is assigned a default value of 0 001 when the system is first turned on The reference value is stored and displayed in the selected units The user can change the reference value by navigating to the reference value and units fields and modifying them using the Up Down Left Right keys If the displayed units change then the user needs to update the stored reference value so that the system will store the new units in the reference The Math field can be turned off from the math configurations screen The seco
27. operating the Model 1928 C Optical Power Meter please read and understand all of Section 1 WARNING Do not attempt to operate this equipment if there is evidence of shipping damage or you suspect the unit is damaged Damaged equipment may present additional hazards to you Contact Newport technical support for advice before attempting to plug in and operate damaged equipment WARNING To avoid electric shock connect the instrument to properly earth grounded 3 prong receptacles only Failure to observe this precaution can result in severe injury WARNING bb bb Before cleaning the enclosure of the Model 1928 C Optical Power Safety Precautions Meter the AC power cord must be disconnected from the wall socket CAUTION There are no user serviceable parts inside the Model 1928 C Optical Power Meter Work performed by persons not authorized by Newport Corporation will void the warranty For instructions on obtaining warranty repair or service please refer to Section 11 1 3 Location of Labels 1 3 1 Rear Panel Markings on the rear panel identify the instrument compliance with different standards and regulations The labels are located in the middle of the rear panel Location of Labels CAUTION DO NOT REMOVE COVER REFER SERVICING TO QUALIFIED PERSONNEL DISCONNECT POWER BEFORE REPLACING FUSE Figure 12 Locations of labels on the rear panel 2 1 General Information
28. pA 2 50 mA 25 mA Resolution 76 3 pA 763 pA 7 63 nA 76 3 nA 763 nA Accuracy 1 0 1 0 1 0 1 0 1 0 Bandwidth 480 Hz 4 kHz 43 kHz 170 kHz 500 kHz Maximum Pulse Repetition Rate 480 Hz 4 kHz 4 kHz 4 kHz 4 kHz D C Voltage Measurement Thermopile Signal Range 0 1 2 3 4 5 Full Scale Voltage 2 5mV 25 0 mV 250 mV 2 50 V 25 0 V 130 V Resolution 76 3 nV 763 nV 7 63 uV 76 3 pV 763 uV 3 96 mV Accuracy 0 2 0 2 0 2 0 2 0 2 0 2 Filtered Rec racy Maximum 1 0 1 0 1 0 1 0 1 0 1 0 Measurement Rate 2 kHz i f 7 Bandwidth 600 kHz 1000 kHz 1000 kHz 1000 kHz 400 kHz 1000 kHz Signal to Noise Ratio 100dB 120dB 130dB 130dB 130dB 120dB Pulse Voltage Measurement Energy Pyroelectric Signal Range 0 1 2 3 4 5 Full Scale Current 2 5mV 25 0 mV 250 mV 2 50 V 25 0 V 130 V Resolution 76 3 nV 763 nV 7 63 uV 76 3 uV 763 pV 3 96 mV Accuracy 1 0 1 0 1 0 1 0 1 0 1 0 Bandwidth 600kKHz 1000kHz 1000kHz 1000kKHz 400kKHz 1000kHz aa at 2 kHz 2 kHz 2 kHz 2 kHz 2 kHz 2 kHz 24 General Information RMS Measurement Maximum Pulse Repetition Rate 2 kHz 4 kHz Accuracy 1 0 2 0 Analog Output Output Range Full Scale Voltage Load gt 100 kQ 1V 2V 5V Accuracy 1 0 1 0 1 0 Trigger Level 0 3 0 3 0 3 Linearity Programmable Level 0 100 Full Sc
29. performed inside the Optical Power Meter by persons not authorized by Newport may void the warranty WARNING To avoid electrical shock hazard connect the instrument to properly earth grounded 3 prong receptacles only Failure to observe this precaution can result in severe injury 30 System Overview This page is intentionally left blank 4 4 1 4 1 1 System Operation Front Panel Power Standby Key Standby Key d 5 3466 ae Figure 15 Standby Key The 1928 C Optical Power Meter can be placed in Standby mode by pressing the Standby soft key located on its front panel It is the leftmost soft key in the main measurement view When this key is pressed the unit displays a message stating Entering Standby Mode for a few seconds before actually entering this mode Once the unit is in Standby mode all its functions including display are turned OFF The unit can exit this mode and resume all functions either by pressing any key on its front panel or by sending commands to it from a host PC via USB communication interface 32 System Operation 4 2 Front Panel Keys The front panel keys are organized in four groups see Figure 16 e Navigation Keys e Escape ESC Key e Reconfigurable Keys also called Soft Keys e Dedicated Keys GO Newport Power Meter Model 1928 C Bl 5 3466 a 2 92 5 uW B Keys z Escape Key Dedicated Keys Reconfigurable Soft Keys Figure 16 F
30. the displayed value This reading is the optical power observed by the detector due to the source This process assumes that the ambient signal is not changing between the time when the Zero key is pressed and when the measurement is made The user should remember that if he she can see the detector active area as he she moves around then the detector registers this as a changing ambient DC signal e For the 918D series detectors also 818 XX lower power detectors with proper adapters you can decide whether to use the attenuator for your measurement or deactivate or physically remove on 818 low power series the attenuator a For very low power measurements below uW range in various ambient light environments you can elect to use the detector with no physical attenuator in the optical path This will increase the sensitivity and hence accuracy of the measurement b Incase of higher power measurement the attenuator should be used to avoid damage or saturation of the detector The attenuator use is recommended in mW to low Wattage range incident power Please refer to the specifications of the particular detector to make sure you do not exceed the saturation levels of the detector For the 918D series detectors with integrated non removable attenuators there is a switch built into the detector head sensing the position of the attenuator The Optical Power Meter will then automatically use proper calibration data for presence or ab
31. the instrument Connection Start the application which will detect and connect the attached optical power meter The 1928 C Optical Power Meter has just one channel so channel B is grayed out S Newport Optical Power Meter Application 1918 C 4 5 xj File View Tools Help Channel B Connect Button Made P P CONT ne Mode DC CONT lel parce 13 228 ww 0 000 ww Range of1l2fa 4 s En Range en Ve Je IE Auto Wavelength 800 nm Wavelength 1550 nm z Power ERR No Error 11 13 2006 4 16 PM Figure 55 Application front panel Connected ADDR 1 62 Software Application 6 3 6 4 General Usage This software application allows the user to setup and monitor the instrument remotely The controls on the instrument are available in the software in a very easy to read and change format Application Options Connection Configuration Data Display Brightness 100 Channel A Channel B Attenuator lv Attenuator Iv Wavelength 800 t Wavelength 700 a Units W Units A Mode DC CONT Mode DC CONT Figure 56 Application Advanced Options Configuration Tab The application is designed to have menus similar to standard Windows applications like MS Word to ease usability Menu Structure To Exit the application go to the File menu and select Exit The Edit Advanced Options menu has additional property settings including channel settings and data log
32. will be the licensor with respect to such Supplemental Components in lieu of Newport for the purposes of the EULA and ii TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW THE SUPPLEMENTAL COMPONENTS AND ANY IF ANY SUPPORT SERVICES RELATED TO THE SUPPLEMENTAL COMPONENTS ARE PROVIDED AS IS AND WITH ALL FAULTS ALL OTHER DISCLAIMERS LIMITATION OF DAMAGES AND SPECIAL PROVISIONS PROVIDED BELOW AND OR OTHERWISE WITH THE SOFTWARE SHALL APPLY TO SUCH SUPPLEMENTAL COMPONENTS MS Microsoft Corporation or their subsidiaries reserve the right to discontinue any Internet based services provided to you or made available to you through the use of the SOFTWARE Recovery Media If SOFTWARE is provided by Newport on separate media and labeled Recovery Media you may use the Recovery Media solely to restore or reinstall the SOFTWARE originally installed on the DEVICE Backup Copy You may make one 1 backup copy of the SOFTWARE You may use this backup copy solely for your archival purposes and to reinstall the SOFTWARE on the DEVICE Except as expressly provided in this EULA or by local law you may not otherwise make copies of the SOFTWARE including the printed materials accompanying the SOFTWARE You may not loan rent lend or otherwise transfer the backup copy to another user End User Proof of License If you acquired the SOFTWARE on a DEVICE or on a compact disc or other media a genuine Microsoft Proof of License Certificate of Authenticit
33. 17 WEEE Directive Symbol s ssesessseessessrsseessessrssressessrssresseessesressee 17 Locations of labels on the rear panel nsnssenneeseosseeseeseesseesseseessee 20 Front Panel Layouts i a aera a 27 Rear Pate niinkin i yd aati dete G R R aE 28 Standby Keyparar n a E E ENE E 31 PONE Pane like ye asus eset boars u salah E oat ae leah a te 32 Navigation Selection and Setup Enter keys eccceceeeseeeeeeeees 32 M i Serec aeees aias ena yoini aee a AES a E E a ia es 33 Measurement Settings Screen sssseessessssseessessreseosseeseesresseeseesressee 33 SOKE Seer a a a a e r e 34 Dedicated Key Sst ater ieee alan e san steal at aes a a ES 34 Manual Range modes 45 sccisciesins atavecsiatnccsd daa eavactesuescrases aaeaiae eas 35 A to Range mod rer erra E AAE Ea aa aaia i aA 35 This screen is displayed after pressing the Config soft key 35 Mode selection screens jisscca isd ecctitsapcctieneaevias ince aa aetauseanes 36 Measurement is on NOG oe yesciescssehisvestaddicn cade nadeetoucsie te nnnahlianscndds 36 Filterselection SG eM so 8 0 eo faa A Pa hak ot alae Te 36 Filter configuration SCreSth ss c 05d anncee ssdcascsacnesecsseseessceanenae ssddacdaass 37 Digit l Pitter Sain sss cu2 hacep sky na itan ATES iiih 37 Way lengths SCreen sss ccss sheds coesk se sciidsahaastaasviavstealncaak estadaibaatiaaeaans 37 Zero Selection itede nea en a i a e a aa eia 38 Measurement Settings Sereen ty cassie ive ii ase eae cats
34. 2 casas pach tacsttga dd in cnalaseinseantstede edie 64 8 Communication Command Reference 65 8 1 1928 C Optical Power Meter Remote Interface Commands 65 8 2 Command CO Ver view cochos dena a E a aaea 65 8 3 Optical Power Meter Command Description ccceeeeeeee 66 8 3 1 Command Glossary ecccecsccceseceseceeeceeeecseeeteeeeeeensees 66 8 3 2 Display Commands sssseseeeseesseeseeseesseesesresseesreseessee 68 8 3 3 Optical Power Meter Commands ccceeseeeeeereeeees 69 9 Principles of Operation 97 9 TtrOGU CHOI Fes rdr tae a uae nesta tueeegee 97 9 2 Analog Signal POW s cecc ctscesaacacetesetncseieivecuneeletedencdicnteGensetaee 97 9 3 Digitized Signal FloWecsiaccinsinni inona 98 9 4 Typical Detector Signals ssessesseeeesseossesseseosseesesresseessesressee 99 9 5 Thermopile Detector Signals 00 0 0 ccc eeceesseeeteceeeceeeeeeteeenneens 100 9 6 Pulse Energy Detector Signals ccccssscssssssssssetcesncsseecees 100 9 7 Peak to Peak Photodiode Detector Signals c eee 101 9 8 Integration of Detector Signals 0 0 0 ceeccesseeeseceeeeeeeeeeteeesaeens 102 9 9 Analog Outp ts eo aae n iranian cee a 103 9 10 Measurement Considerations ss ssessssseeseeseessesreseessresseseee 104 9 10 1 Detector Calibration and Uncertainty 0 ee 104 9 10 2 Quantum Detector Temperature Effects 0 ee 104 9 10 3 Thermopile Detector Temperature Effects 0 0
35. 2 5 kHz 3 1 kHz 4 5 Hz Related Commands PM ANALOGFILTER PM ANALOG IMP Description Analog input impedance select command Syntax PM ANALOG IMP value Remarks The PM ANALOG IMP command selects the analog input impedance Argument Value Input Impedance Value 0 50 Q 1 100 KQ 2 1 MQ Related Commands PM ANALOG IMP PM ANALOG IMP Description Analog input impedance query Syntax PM ANALOG IMP Remarks The PM ANALOG IMP query returns an integer indicating the present analog input impedance Argument Value Input Impedance Value 0 500 1 100 kQ 2 1 MQ Related Commands PM ANALOG IMP PM ANALOG OUT Description Analog output range select command Syntax PM ANALOG OUT range Remarks The PM ANALOG OUT command selects the analog output range Communication Command Reference 73 8 3 3 13 8 3 3 14 8 3 3 15 Argument Value Max Output Range 0 1V 1 2V 2 5V 3 Reserved Related Commands PM ANALOG OUT PM ANALOG OUT Description Analog output range query Syntax PM ANALOG OUT Remarks The PM ANALOG OUT query returns an integer indicating the present analog output range Response Value Max Output Range 0 1V 1 2V 2 5V 3 Reserved Related Commands PM ANALOG OUT PM ATT Description Attenuator enable command Syntax PM ATT enable Remarks Indicates whether or not the attenuator for the 818 Series power detector is on the detector Argument Type Description Enable int Enable use of detector responsiv
36. 8 3 3 53 Response Type Description Timeout int measurement timeout in milliseconds Related Commands PM MEAS TIMEOUT PM MODE Description Acquisition mode select Syntax PM MODE mode Remarks The PM MODE command selects the acquisition mode for acquiring subsequent readings Argument Value Description Mode 0 DC Continuous 1 DC Single 2 Integrate 3 Peak to peak Continuous 4 Peak to peak Single 5 Pulse Continuous 6 Pulse Single 7 RMS Related Commands PM MODE Note The MODE selection depends on the detector used Refer to Table 1 for the relationship between the detector type and MODE PM MODE Description Acquisition mode query Syntax M MODE Remarks The PM MODE query returns an integer indicating the present acquisition mode Response Value Description Mode 0 DC Continuous 1 DC Single 2 Integrate 3 Peak to peak Continuous 4 Peak to peak Single 5 Pulse Continuous 6 Pulse Single 7 RMS Related Commands PM MODE Note The UNITs selection depends on the detector used Refer to Table 1 for the relationship between the detector type and units 86 Communication Command Reference 8 3 3 54 8 3 3 55 PM Power Description Power query Syntax PM P Remarks The PM P query returns the power in the selected units Response Type Description power exp Exponential form i e 9 4689E 04 Related Commands PM UNITS PM PWS PM PWS Description Read with status query Syntax PM PWS Remarks The PM PWS query
37. For example if the detector is modulated with a sine wave of 800Hz the user may choose to set the Analog filter to 1kHz to increase the SNR and be able to measure very small signals Also cutting the bandwidth at 1kHz does not affect the measurement However if the modulation frequency is 800Hz but the signal is a square the user may opt to cut the bandwidth higher at 12 5kHz to let the signal harmonics be unfiltered and minimize the distortion Of course in this case the noise in the system will increase with the square root of the bandwidth The user needs to asses the tradeoffs in his measurement taking advantage of the 1928 C high flexibility in setting the proper filters for the measurement Generally the 5Hz filter is used for CW Cont measurements However the 1928 C Optical Power Meter can measure the amplitude of AC signals down to 0 01Hz so the 5Hz filter can be used for any modulating signal below 5Hz Principles of Operation 107 9 11 The Digital Filter is a moving average filter that can be set at 10 100 1000 or 10000 measurements These values can be changed by the user If the digital filter is set on 10 the average value is computed on 10 measurements in a First In First Out FIFO fashion The Digital Filter helps the SNR the same way as the Analog Filter does With both filters on low level continuous signals can be measured with a high degree of accuracy The Analog Filter is always applied to the entir
38. Inspect the contents for damage If there is visible damage to the instrument or accessories upon receipt inform the shipping company and Newport Corporation immediately General Information 25 2 6 2 7 2 8 2 9 WARNING Do not attempt to operate this equipment if there is evidence of shipping damage or you suspect the unit is damaged Damaged equipment may present additional hazards to you Contact Newport technical support for advice before attempting to plug in and operate damaged equipment Available Options and Accessories Newport Corporation also supplies temperature controlled mounts lenses and other accessories Please consult with your representative for additional information Parts List The following is a list of parts included with the 1928 C Optical Power Meter 1 A CD ROM containing the User s Manual Software Drivers and Utilities A PDF version of the manual can also be downloaded from the Newport website at www newport com 2 Power cord If you are missing any of these items or have questions about the items you have received please contact Newport Corporation Choosing and Preparing a Suitable Work Surface The 1928 C Optical Power Meter may be placed on any reasonably firm table or bench during operation The front legs of the unit can be pulled out to tilt the unit at an angle if desired Provide adequate distance between the 1928 C Optical Power Meter and adjacent
39. Introductionis a A a a aas 53 5 2 Measurement Modes and Units 00 0 0 cecceecceeceeceeteeeeteeeteeneees 53 5 3 CW Measurements with 918D or 818P Detectors 006 54 5 4 Peak to Peak Power Measurements 918D Detectors 55 5 5 Power Ratio and Power Reference measurements 05 56 5 6 Pulse Energy Measurements 818E Detectors 0 0 0 cece 56 5 7 Signal Integration Measurements 918D or 818P Detectors 57 5 8 Measuring Laser Pulse Energy with an 818P Thermopile Detector Single Shot giv siesta lariat diate a E ER 57 5 97 RMS Measuremi ntSiceceascereci nnne ne 59 Software Application 61 xi Preface GM ON CITC seta os re ea as Son a dc See ane ad a hat Sad 61 6 2 Connectionin ini eas iaat a i a n i 61 6 3 Genera Usage sinr uesa aaar AREO Aa NR ARES i 62 64 M nuStruct re siens ie cc ed ees ee Ei 62 7 Computer Interfacing 63 Tide Gen rakGu ideliNES ssassn arna asn a aR 63 7 2 Computer Interface Terminology ceccceecceeeceeseeeseeenteeeteeeees 63 7 2 1 lt gt Delimiting PUN CMAN ss x csessaiel edasacedsasvidinsecuatt 63 7 2 2 lt CR gt Carriage Return kesctic desu tect thea iota dae ane 63 T23 SE lite Peed aiscacevseuede cose iene E are we ude 63 7 2 4 Semicolons ict alas Saal it aoa sai Seteee cade 64 7 2 5 numbers Numerical Types lt acc ccm eons 64 7 2 6 lt string gt String Types sisi s2scttsssivteciessiccntiveedaddusasiscucts 64 T3 SBC omic ations
40. M CORR command returns the power measurement correction settings These settings are used by the power meter to correct the actual power measurement The corrected power is calculated using the formula provided below 76 Communication Command Reference 8 3 3 23 8 3 3 24 8 3 3 25 Response valuel value2 value3 Corrected Measurement Actual Measurement valuel value2 value3 Type Description float Multiplier 1 default 1 000 float Offset default 0 000 float Multiplier 2 default 1 000 Related Commands PM CORR PM Power PM DPower PM DETMODEL Description Syntax Remarks For example Response model PM DETSIZE Description Syntax Remarks Response Area PM DETSN Description Syntax Remarks For example Response serial number Detector model query PM DETMODEL The PM DETMODEL query returns the model number of the detector 818 SL Type Description string Detector model number Detector surface area PM DETSIZE The PM DETSIZE query returns the surface area of the detector in cm Type float Description Detector surface area Detector serial number query PM DETSN The PM DETSN query returns the serial number of the detector 0001 Type string Description Detector serial number Communication Command Reference 77 8 3 3 26 8 3 3 27 8 3 3 28 8 3 3 29 PM DIGITALFILTER Description Digital filter sele
41. Model 1928 C Optical Power Meter Ang Users Manual GLO Newport Preface Preface EU Declaration of Conformity We declare that the accompanying product identified with the C mark complies with the requirements of the Electromagnetic Compatibility Directive 2004 108 EC and the Low Voltage Directive 73 23 EEC Model Number 1928 C Year C mark affixed 2009 Type of Equipment Electrical equipment for measurement control and laboratory use in industrial locations Manufacturer Newport Corporation 1791 Deere Avenue Irvine CA 92606 Standards Applied Compliance was demonstrated to the following standards to the extent applicable BS EN61326 1 2006 Electrical equipment for measurement control and laboratory use EMC requirements This equipment meets the CISPR 11 2006 A2 Class A Group 1 radiated and conducted emission limits BS EN 61010 1 2001 2 Edition Safety requirements for electrical equipment for measurement control and laboratory use ee LZ aaa flies fle to Bruno Rety Sean E LeCave Group Director of PPT Instrument and Motion Europe Sr Manager Quality Zone Industrielle 1791 Deere Avenue 45340 Beaune la Rolande France Irvine CA USA Preface Firmware and User Manual Updates Dear Customer In an effort to keep the 1928 C Optical Power Meter optimized for your applications Newport will on occasion update existing and add new features to
42. Thermopile in CW Integrate ILO E A as alate Gt A SE E aahe 58 Figure 55 Application front panel sseseesseeseesessseessessessrosseeseesresseessesresseesse 6l Figure 56 Application Advanced Options Configuration Tab 06 62 Figure 57 1928 C Optical Power Meter Analog Signal Flow Diagram 97 Figure 58 Thermopile Signals exhibit 1 to 10 second time constants 100 Figure 59 Typical Newport Energy Detector Signal Waveform 101 Figure 60 Negative Baseline Voltages nccscs act ascentareatavicer discs ates 101 Figure 61 Time Varying Signal Measurements ccccesceeeseceeeeeeeeeeeees 102 Figure 62 Integrated Energy Via a Trapezoid Approximation 06 102 Figure 63 Measuring Laser Pulse Energy with a Thermopile 103 Figure 64 Disassembled 1928 C Optical Power Meter ccceeceeeseeetees 126 List of Tables Table 1 Available Measurement Modes and Valid Units 0 0 0 0 eee 54 Table 2 Root level Commands Queries Summary cccceeceeeseeeseetteeees 66 Table 3 Tree Level Commands Queries Summary ccccssceeteeeeeeees 68 Table 4 Analog Signal Flow Paths 2 5 cases dese codeasascaddaceasewatcesestgeetaesensmevaes 98 Table 5 Analog Output Range Table ecceccscceseceeeceeeeeeeeceeeeteensees 103 Table 6 Common Measurement Errors cccceesscecseececeseeeesneeeenteeeenaees 107 Table 7 Legacy Commands Reference y c2 csdccascosncdssevscc
43. aadnndantevananisevelss 122 1 1 1 1 1 1 1 2 1 1 3 Safety Precautions Definitions and Symbols The following terms and symbols are used in this documentation and also appear on the 1928 C Optical Power Meter where safety related issues occur General Warning or Caution Figure 1 General Warning or Caution Symbol The Exclamation Symbol in the figure above appears in Warning and Caution tables throughout this document This symbol designates an area where personal injury or damage to the equipment is possible Electric Shock Figure 2 Electrical Shock Symbol The Electrical Shock Symbol in the figure above appears throughout this manual This symbol indicates a hazard arising from dangerous voltage Any mishandling could result in irreparable damage to the equipment and personal injury or death Protective Conductor Terminal Figure 3 Protective Conductor Terminal Symbol The protective conductor terminal symbol in the above figure identifies the location of the bonding terminal which is bonded to conductive accessible parts of the enclosure for safety purposes 16 Safety Precautions European Union CE Mark CE Figure 4 CE Mark The presence of the CE Mark on Newport Corporation equipment means that it has been designed tested and certified as complying with all applicable European Union CE regulations and recommendations Alternating voltage symbol d Figure 5 Alternating Voltage Symbol This i
44. abilities include the computation of Min Max Max Min Mean and Standard Deviation Additional features such as digital and analog filtering and data storage of up to 250 000 readings per channel are also offered Newport s experience with calibration together with N I S T calibration traceability and high precision Optical Power Meters provide users with accurate measurements and exceptional inter instrument correlation In R amp D QA QC and manufacturing environments the 1928 C Optical Power Meters 22 General Information 2 2 2 3 2 3 1 enable users to benefit from high correlation between multiple locations at a price to performance ratio second to none Among all the other practical tools provided remote controlling with a computer and synchronization to other instruments are simplified with the inclusion of LabVIEW drivers tools to develop in the NET environment and a high speed software utility that fully utilizes the optical power meter s ability to sample at 250 kHz and transfer data via a Full Speed USB interface 11 Mbps Calibration Calibration of the optical power meter is done at the factory by defining a slope and offset for all ranges as determined for each detector type Newport recommends annual factory re calibration to ensure the continued accuracy of the instrument measurements Please refer to the Maintenance and Troubleshooting section for contact information for re calibration of your
45. ability for Certain Damages EXCEPT AS PROHIBITED BY LAW MS SHALL HAVE NO LIABILITY FOR ANY INDIRECT SPECIAL CONSEQUENTIAL OR INCIDENTAL DAMAGES ARISING FROM OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THE SOFTWARE THIS LIMITATION SHALL APPLY EVEN IF ANY REMEDY FAILS OF ITS ESSENTIAL PURPOSE IN NO EVENT SHALL MS BE LIABLE FOR ANY AMOUNT IN EXCESS OF U S TWO HUNDRED FIFTY DOLLARS U S 250 00 e Restricted Uses The SOFTWARE is not designed or intended for use or resale in hazardous environments requiring fail safe performance such as in the operation of nuclear facilities aircraft navigation or communication systems air traffic control or other devices or systems in which a malfunction of the SOFTWARE would result in foreseeable risk of injury or death to the operator of the device or system or to others e Limitations on Reverse Engineering Decompilation and Disassembly You may not reverse engineer decompile or disassemble the SOFTWARE except and only to the extent that such activity is expressly permitted by applicable law notwithstanding this limitation e SOFTWARE as a Component of the DEVICE transfer This license may not be shared transferred to or used concurrently on different computers The SOFTWARE is licensed with the DEVICE as a single integrated product and may only be used with the DEVICE If the SOFTWARE is not accompanied by a DEVICE you may not use the SOFTWARE You may permanently transfer all of your rights und
46. ace area This value is 2 2 used to when measurement units are set to W cm J cm or Sun Argument Type Description Value float Spot size cm Related Commands PM SPOTSIZE PM DETSIZE PM SPOTSIZE Description Detector spot size query Syntax PM SPOTSIZE Remarks The PM SPOTSIZE query returns the detector spot size in cm 90 Communication Command Reference Response Type Description Spot size float detector spot size in cm Related Commands PM SPOTSIZE PM DETSIZE 8 3 3 66 PM STAT MAX Description Statistics Maximum Value Query Syntax PM STAT MAX Parameters None Function This query returns the maximum value in the statistics buffer Returns lt max gt lt max gt is of type lt number gt in exponent notation 8 3 3 67 PM STAT MEAN Description Statistics Mean Value Query Syntax PM STAT MEAN Parameters None Function This query returns the mean or average of all the values in the statistics buffer Returns lt mean gt lt mean gt is of type lt number gt in exponent notation 8 3 3 68 PM STAT MIN Description Statistics Minimum Value Query Syntax PM STAT MIN Parameters None Function This query returns the minimum value in the statistics buffer Returns lt min gt lt min gt is of type lt number gt in exponent notation 8 3 3 69 PM STAT MAXMIN Description Statistics Max Min Query Syntax PM STAT MAXMIN Parameters None Communication Command Reference 91 8 3 3 70 8 3 3 71 8 3 3 72 F
47. ale Resolution 0 39 Full Scale 1 With 5Hz filter on and Digital Filter of 10000 samples on Listed signal ranges specify meter capability Available signal ranges are detector dependent 3 Maximum measurable signal is detector dependent 4 While the maximum repetition range may equal the bandwidth it really depends on the signal duty cycle or the signal shape 5 The Maximum Repetition Rate refers to the meter pulse by pulse measuring capability Due to its high bandwidth the 1928 C can take in signals with higher repetitive rates and outputs them undistorted at the Analog Output The instrument bandwidth is determined by the detector used Please refer to Newport Corporation s complete offering on detector type The specified bandwidth is measured from the instrument input detector to the Analog Output BNC 2 4 Unpacking and Handling It is recommended that the 1928 C Optical Power Meter be unpacked in a lab environment or work site Unpack the system carefully small parts and cables are included with the instrument Inspect the box carefully for loose parts before disposing of the packaging You are urged to save the packaging material in case you need to ship your equipment in the future 2 5 Inspection for Damage The 1928 C Optical Power Meter is carefully packaged at the factory to minimize the possibility of damage during shipping Inspect the box for external signs of damage or mishandling
48. asra E e a E a A 22 2 3 1 Physical Speciticattons sicAs ceceitsseestdadee saves dececasts 22 2 3 2 Electrical SpecifiCatioms3x 05 h eiusastacessanclechsagttapianerage 23 2 4 Unpacking and Handling j s55 cas scceiscastueieessoatiet es ess 24 2 5 Inspection for Damage occ e kos ase casuaccecssuesaveectes ees maaeaseiceametanss 24 2 6 Available Options and AcCeSSOLIES ccescceeseeeteeesseetteeeteeeees 25 21 Parts List serete ati nao ai ai A e iaa 25 2 8 Choosing and Preparing a Suitable Work Surface 0 eee 25 2 9 Electrical Requirements sseseeseeseeeseesseseresesseserssressessrssresseese 25 2 10 Power Supply scccestiawsisieiiakleniadniod enean a a n 26 3 System Overview 27 ZL Startup Procedure sc 5 ics ese non inen hava aaa 27 3 2 Front Panel avout x scascct eat aascotacCous Baker comeee cows Acar senonsitinse 27 3 2 1 Front Panel Elements 200 000 eeeesesssesssssssssssssssssseees 28 Preface 4 6 3 2 2 Understanding the Main Screen eceeeeeeseeereeeeeeeees 28 3 3 Rear Panel Layout ornen riena a ia eins A h 28 3 3 1 Rear Panel Elements 23 pocsicsssasssces stn gevsencesbaaicceanieaeias 29 System Operation 31 4 1 Front Panel Power Standby Ke y sssssesssesesssesseesesseessesersssesse 31 1A Standby Rey aonn otar a E aa R RAE 31 4 2 Eront Pael Keys csc ciaisocrs destecias teseaseassetiksvaedgtinta a wanes 32 BoD Ti Set p Enter IS CY acta soecc eds cance soe cetantoaa acedn
49. ata collection and starts computation of new statistics values Once the desired number of samples are collected 10000 in this case the data collection is automatically disabled and statistics computation is stopped The statistics shown at this point are representative of the collected data collected and available for download This soft key can be pressed at any time to restart the whole process again The data collected can be saved to a flash drive attached to the rear panel of the unit by pressing Save soft key The user can change the mode using the Navigation keys Use the Up Down navigation keys to highlight the Mode choices Press the Enter key to view a drop down menu that allows users to select Fixed or Continuous Mode Use the Up Down navigation keys followed by Enter to change the mode to Continuous Pressing Clear Stats soft key in Continuous mode clears current statistics enables data collection and starts computation of new statistics values In this mode the unit does not disable data collection when the number of samples specified is collected Instead it continues to collect data and place them in a data buffer on a first in first out FIFO basis The statistics shown are representative of data collected since the time Clear Stats was last pressed As in Fixed mode the Clear Stats soft key can be pressed at any time to restart the whole process again The Graph soft key Section 4 8 1 can be used for the visualization
50. bar in the Analog Bar is very small so with the Analog Zoom this bar is extended giving the user the convenience to see better small signal variations Pressing the Reset m M soft key clears the minimum and maximum bars from both the Analog Bar and the Auto zoom graphs Analog Needle The Analog Needle displays a vertical marker that moves with the displayed REE numeric value It is useful for users who look for a maximum or a minimum when adjusting the optical power 21 22 54 99 pw 109 99 pw rement setup Figure48 Analog Needle display 50 System Operation 4 11 4 Vertical Chart When the Vertical Chart is selected the numeric display is moved in the upper right corner The vertical chart scrolls down representing a snapshot of the last measurements The chart can be cleared with the Clear soft key The maximum peak value of the chart is the maximum measurement of the entire chart since the last clear Below the chart there is a line with the chart maximum and minimum in Figure 49 Vertical chart with 10 major units On the same line in the LOSI emen Dee middle there is information about the chart zoom level e g 2x and the number of samples processed per chart line e g 10 Avg Figure 49 The chart has 100 lines each line having a white and red color When the system fills up a line it looks at a number of samples defined by the x 1 Avg Peak 0 000 number displayed below the chart
51. bration wavelength and the responsivity map downloaded from the detector calibration module The output of this process i e the measurement value is the digitized input value divided by the responsivity associated with the current calibration wavelength or the user defined calibration value Different responsivities are used depending upon if the attenuator is on as shown in the Setup Menu Units Correction Unit s correction adjusts a measurement value to account for the display units selected When the display units are equal to the detector signal units i e equal to the numerator of the responsivity units Table 1 the measurement value is not adjusted Otherwise the digitized value is adjusted to account for detector responsivity and or additional unit conversions such as W to W cm NOTE Per area unit conversions such as W to W cm divide the measurement value by the active area of the detector This calculation assumes that the entire active area of the detector is uniformly illuminated Per area measurements where the entire detector active area is not uniformly lit are not accurate The user must insure that these conditions are met before utilizing per area units or make measurement corrections accordingly Typical Detector Signals The flexibility of the 1928 C Optical Power Meter analog signal flow is required in order that it may properly measure the signals that various types of detectors make Basic optical power or e
52. can be set in different ways e None The system is always triggered e Soft Key The system can be triggered with a Soft Key that appears in the main measurement screen Command The system is triggered with an external command PM TRIG STATE Section 8 3 3 The Trigger Start can also be set with an external command PM TRIG START Section 8 3 3 Trigger Stop The Trigger Stop is an event that tells the system when to stop taking measurements In the case of a single measurement a trigger stop event arms the system for the next measurement It can be set in different ways None The system measures continuously Soft Key The system stops measuring when a Soft Key is pressed This key appears on the main measurement screen e Command The system stops measuring when an external command PM TRIG STOP Section 8 3 3 is sent via USB e Value The system stops measuring when the measured signal crosses a user programmed value in CW Integrate mode e Time The system stops measuring when a user programmed time passed between the Start event and the current measurement The Trigger Stop can also be set with an external command PM TRIG STOP Section 8 3 3 42 System Operation 4 5 4 6 Wavelength Setting Newport detectors have a calibration module or internal memory which stores the Responsivity versus Wavelength Table If the Lambda key is pressed a wavelength screen is displayed with the most common values in nano
53. cated key This value can be cleared or updated if the unit is in the main measurement screen and Zero is pressed see Section 4 2 5 for more information Detector Information The Measurement Settings screen displays information about the detector used based on the data available in the detector calibration module or detector internal memory The available data are the detector model number Detector the detector serial number S N the detector temperature Det temp if the detector has an internal temperature sensor and the detector responsivity Responsivity System Operation 41 4 4 4 4 1 4 4 2 Trigger Setup The Trigger Setup screen can be saitings accessed from the Measurement Walsh Al Detector 918D SLOD3 Settings Figure 33 Pressing the Rang 0 0 pW S N 951 Trigger soft key gives the user a few a a e E AA wy choices to setup the trigger according Analog filter 5 Hz Offset 0 0000 Digital filter Off Det temp Units Watts Responsivity CW Cont Num Digits to the measurement needs The 1928 C Optical Power Meter has an advanced Trigger set that allows the user to synchronize the measurements Mea Synchronization can be achieved with Figure 33 Accessing the Trigger Setup Trigger Start and Trigger Stop which screen can both be set from the trigger setup screen Trigger Start The Trigger Start is an event that tells the system when to take a measurement or a group of measurements It
54. ct command Syntax PM DIGITALFILTER value Remarks The PM DIGITALFILTER command specifies the digital filter setting Argument Type Description Value int digital filter size between 0 and 10000 Related Commands PM DIGITALFILTER PM DIGITALFILTER Description Digital filter query Syntax PM DIGITALFILTER Remarks The PM DIGITALFILTER query returns the present digital filter setting Argument Type Description Value int digital filter size between 0 and 10000 Related Commands PM DIGITALFILTER PM DPower Description Detector power query Syntax PM DPower Remarks The PM DPower returns the actual power measurement This measurement does not include any correction settings specified using PM CORR command When the correction settings are set to default values the power measurement returned by this command is same as the measurement returned by PM P command Response Type Description Power float Power in Watts Related Commands PM Power PM DS BUFfer Description Data Store buffer behavior selection Syntax PM DS BUFfer behavior Remarks The PM DS BUFfer command selects the behavior mode for control of the Data Store buffer 78 Communication Command Reference 8 3 3 30 8 3 3 31 8 3 3 32 Argument Value Description Mode 0 Fixed Size 1 Ring Buffer The behavior of the ring buffer is to allow continual data collection after the buffer is full where the oldest values will be overwritten whe
55. d represents an integer of the range 1 to 250000 Related Commands PM DS SIZE PM DS INTerval PM DS INTerval PM DS UNITs Description Data store units query Syntax PM DS UNITS Remarks The PM DS UNITS query returns an integer indicating the units selected Response Value Description units 0 Amps 1 Volts 2 Watts 3 Watts cm 4 Joules 5 Joules cm 6 dBm 7 10 Reserved 11 Sun 82 Communication Command Reference 8 3 3 42 8 3 3 43 8 3 3 44 Related Commands PM UNITS PM UNITS Note The UNITs selection depends on the detector used Refer to Table 1 for the relationship between the detector type and units PM FiLTer Description Filter select command Syntax PM FILT filter type Remarks The PM FILT command select the filtering operation to be performed on power readings Argument Value Description Filter type 0 No filtering 1 Analog filter 2 Digital filter 3 Analog and Digital filter Related Commands PM FILT PM FILTer Description Filter type query Syntax PM FILT Remarks The PM FILT query returns an integer indicating the present filter mode Response Value Description Filter type 0 No filtering 1 Analog filter 2 Digital filter 3 Analog and Digital filter Related Commands PM FILT PM Lambda Description Wavelength set command Syntax PM Lambda value Remarks The PM Lambda command selects the wavelength to use when calculating power The value must fall within the calibrated wavelength of t
56. damage occurring in transit and is not obligated to accept products returned without an RMA E mail rma service newport com When calling Newport Corporation please provide the customer care representative with the following information Your Contact Information Serial number or original order number 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 viii Preface IMPORTANT NOTE Before plugging the instrument into a PC via a USB communication port please make sure that the USB Drivers are installed Run Setup exe from the Software CD that came with your product The installation program will configure the PC with the 1928 C USB drivers Preface Table of Contents EU Declaration of Conformity 0 0 0 ccceeceesceesseeseeceeceeeeeeeeesseecsseenseenees iii Warranty ae e E E E ain E A a a A E aac v Technical Support Contacts s ssessesesseessesesseessessessresseesssresseessesressee vii Fableof Contents tartre iiare aaea eanna e aT sA EE E EAA E TEA aT
57. data store max size Return data store max size Return data store units Selects the filtering operation no filtering analog filter digital filter or analog and digital Returns the filtering operation no filtering analog filter digital filter or analog and digital Sets the wavelength for use when calculating power Gets the selected wavelength in nanometers Returns the currently selected acquisition mode Returns the power in the selected units Returns the power with status Selects the gain stage when making readings with the detector head within a range from 0 to 5 with zero being the highest Returns an integer indicating the current range Gets the responsivity currently used for making power calculations 122 Appendix C Legacy Commands RUN_n STOP n RUN_n STOP n STMAX n STMEAN n STMIN n STMXMN_n STSDEV_n UNITS _n UNITS _n USRREF_n USRREF n STOREF n STOZERO n ZEROVAL_n ZEROVAL n New Commands Number of Parameters mn PM RUN NONE PM STAT MAX NONE PM STAT MEAN NONE PM STAT MIN NONE PM STAT MAXMIN NONE PM STAT SDEViation NONE PM UNITs PM UNITs NONE PM REF VALue NONE PM REF STOre NONE PM ZEROSTOre NONE PM ZEROVALue PM ZEROVALue NONE Function Disables or enables the acquisition of data Returns the present acquisition mode Return statistics buffer maximum value Return statistics buffer mean value Return statistics buffer min
58. displayed at the right top corner of the screen If the user presses Show Max soft key a maximum value marker a thinner and longer needle than the measurement needle is shown as in Figure 52 The soft keys available now are also modified as shown in this figure The maximum value captured can be reset by pressing the Reset Max soft key and this marker can be hidden by pressing the Hide Max soft key When the maximum value marker is hidden the soft keys are reconfigured as shown in Figure 51 0 294 mW Figure 51 Analog Gauge Display 0 229 mW Figure 52 Analog Gauge Display with Maximum Value marker 0 261 mW Figure 53 Analog Gauge Display at 50x Zoom The users can zoom in or out around the measurements by pressing the Zoom and Zoom soft keys respectively The default zoom level is 1x At this zoom level the analog gauge minimum and maximum settings are 0 and the present range maximum value When the Zoom and Zoom soft keys are pressed the power meter increases decreases the analog gauge display resolution by modifying its minimum and maximum values see Figure 53 The new values are determined based on the present measured value range maximum value and the zoom level 52 System Operation 4 12 Optical Power Meter Firmware Upgrade Procedure Firmware Upgrade is an easy straight forward process Simply copy firmware files PM1928APP EXE and XMLFILES XML to a WinCE compatible USB Flash Dri
59. ds PM AUTO PM RANG PM CALDATE Description Detector calibration date query Syntax PM CALDATE Remarks The PM CALDATE query returns the calibration date of the detector Communication Command Reference 75 8 3 3 20 8 3 3 21 8 3 3 22 For example Response Date 21JUN1999 Type Description string DDMMMYYYYY PM CALTEMP Description Syntax Remarks Response temperature PM CORR Description Syntax Remarks Argument valuel value2 value3 Temperature at which detector was calibrated query PM CALTEMP The PM CALTEMP query returns the temperature degrees Celsius at which the detector was calibrated When no detector is present no detector is returned Type Description float Returns the temperature at which the detector was calibrated Power measurement correction settings PM CORR value value2 value3 The PM CORR command sets the power measurement correction settings These settings are used by the power meter to correct the actual power measurement The corrected power is calculated using the formula provided below Corrected Measurement Actual Measurement valuel value2 value3 Type Description float Multiplier 1 default 1 000 float Offset default 0 000 float Multiplier 2 default 1 000 Related Commands PM CORR PM Power PM DPower PM CORR Description Syntax Remarks Power measurement correction settings query PM CORR The P
60. e CW Cont Num Digit a Firmware Version 2 1 7 Jul 9 2008 Instrument S N P1001 Instrument Cal Date 09 11 2005 Detector Model 918D SL OD3 Detector S N 10095 Detector Cal Date Jan 23 2007 Figure 37 About screen 2 273E 1 The USB Address can be changed in the System Settings screen Figure 36 Navigate to the USB Address and hit Enter In the drop down menu select the desired USB address 44 System Operation 4 8 Statistics The 1928 C can display statistics for Statistics the measurement in progress From Meas 26 91 yw the main measurement screen press R Max 34 545 the Soft key labeled Statistics The eal eerie Statistics screen is displayed as in POE E A iil i 5 eee Mean 34 405 wy Figure 38 Std Dev 41 486nw The left column shows the current statistics setup The Statistics function has two modes Fixed and E Continuous Figure 38 Statistics screen When in Fixed mode the Statistics engine calculates the minimum Min maximum Max Range Mean Standard Deviation Std Dev for a fixed number of samples and displays them in the right column The number of samples is displayed in the left column on the Samples line As Figure 38 shows the number of samples is 10000 with a time interval between samples of 100 us This means that for this example the statistics values are calculated over 1 second time interval Pressing Clear Stats soft key clears current statistics enables d
61. e amplifier chain of the meter Therefore the user will see the detector signal filtered at the Analog Output BNC The Digital Filter is a digital signal processing filter and is only applied to the calculated measured values that are displayed on the meter screen While the displayed values may have both filters applied An Dg the Analog Output can only have the Analog Filter applied to the signal Because of that the user may see a difference in the way the signal is filtered between the displayed values and the Analog Output values Common Measurement Errors The most common sources of optical measurement error are listed in Table 6 below Other common errors are discussed in the preceding subsections of Measurement Considerations Type of Error What should be done Radiometry Check that all of the light is actually hitting the detector Ambient light Check that any ambient light was ZEROed before the measurement was made Wavelength calibration Check that the calibration factor for the measurement wavelength is properly set Detector saturation or Check that the optical power density remains below damage the detector s saturation or damage Table 6 Common Measurement Errors 108 Principles of Operation This page is intentionally left blank 10 Troubleshooting 10 1 Power Supply Problems Problem Solution 1 The unit does not turn 1 Verify that the power switch is in the on ON position See Sect
62. e fractional portion of the mantissa follows 4 Optional 0 9 digits These digits define the fractional portion of the mantissa 5 Optional exponent indicator an ASCII E or e followed by a or optional followed by decimal digits Examples The numbers below all represent the value 1 2 1 2 1 2e0 01 2E 00000 120E 2 el The numbers below all represent the value 1 2 1 2 1 2e 00 0001 2e 0 120e 2 12E1 2 lt number gt defined as binary The 1928 C recognizes unsigned binary numbers in the range of 0 to 65535 decimal or 0 to 1111111111111111 binary Binary numbers are represented using only the digits 0 and 1 A binary number has the following format B lt binary gt Where B mandatory binary number header lt binary gt binary digits 0 s or 1 s 116 Appendix A Example All numbers below represent the decimal value 129 B 10000001 b010000001 b 10000001 3 lt number gt defined as octal The 1928 C recognizes unsigned octal numbers in the range 0 to 65535 decimal or 0 to 177777 octal Octal numbers are represented using digits from 0 to 7 An octal number has the following format 0 lt octal gt Where Q mandatory octal number header lt octal gt octal digits 0 to 7 Example All numbers below represent the decimal value 129 Q201 q0201 q201 4 lt number gt defined as hexadecimal The 1928 C recognizes unsigned hexadecimal numb
63. e is larger than the largest of the previous measurements Besides the maximum value being displayed with a red bar the actual value is displayed above the bar graph where Max shows the value If the Soft key labeled Show Min is selected the minimum value is retained and displayed in the bar graph with green color The green bar is updated with each measurement if the current measured value is smaller than the smallest of the previous measurements Besides the minimum value being displayed with a green bar the actual value is displayed above the bar graph where Min shows the value The maximum and minimum bars can be reset with the Reset m M soft key For users who would like to fine adjust a maximum or a minimum the 1928 C offers the Auto Zoom function When the Auto Zoom soft key is pressed another bar appears above the Analog Bar The bar length Min 10 49 uW Max 40 56 pW is 2 of the Analog Bar It is a display nE of the region around the end of the analog bar 1 22 Figure 47 Auto Zoom System Operation 49 4 11 3 The Auto Zoom bar displays with white the current measured value as the Analog Bar does However its trip is more sensitive because the maximum trip is 1 of the Analog Bar If the Show Max or Show Min soft keys are pressed the system behaves the same as with the Analog Bar displaying with red the maximum value and with green the minimum value As an example as Figure 47 shows the red
64. e noise and fluctuation when I measure my CW light source Any suggestions A Turn on the analog digital filter Check whether the meter and detector calibration is up to date Q Can I measure peak power or energy of a single pulse with a Newport low power detector 918D etc and 1928 C A No There is no energy or peak power mode measurement with the 1928 C when using a low power detector 11 11 1 Maintenance and Service CAUTION There are no user serviceable parts inside the 1928 C Optical Power Meter Work performed by persons not authorized by Newport Corporation will void the warranty Calibration accuracy is warranted for a period of 1 year After 1 year the unit should be returned to Newport Corporation for recalibration and NIST traceability re certification Enclosure Cleaning WARNING Before cleaning the enclosure of the 1928 C Optical Power Meter the external power supply must be disconnected from the unit The enclosure should only be cleaned with isopropyl alcohol or a mild soapy water solution applied to a damp lint free cloth Obtaining Service The 1928 C Optical 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 on the rear panel 2 Instrument serial number on rear panel 3 Description of the probl
65. e range Remarks The PM RANge command selects the gain stage when making readings from the detector head The range of this value depends on the detector being used Response Type Description range int Values range from 0 to 5 for Thermopile and Energy detectors or 0 to 4 for Photodiodes see Section 2 3 2 Related Commands PM RANge PM AUTO PM RANge Description Range query Syntax PM RANge Remarks The PM RANge query returns an integer that indicates the present range The range of this value depends on the detector being used Response Value Description range 0 Values range from 0 to 5 for Thermopile and Energy detectors or 0 to 4 for Photodiodes see Section 2 3 2 Related Commands PM RANge PM AUTO PM REF VALue Description Reference Value Define Syntax PM REF VALue lt val gt Parameters 88 Communication Command Reference 8 3 3 59 8 3 3 60 8 3 3 61 The parameter lt val gt is of type lt number gt Function This command provides a means of directly storing a reference value to be used in linear and logarithmic dB relative measurements The units of this value are the current units being used by the instrument Related Commands PM REF STOre PM REF VALue PM REF VALue Description Reference Value Query Syntax PM REF VALue Parameters None Function This query returns the user defined reference value The units of this value are the current units being used by the instrument
66. em 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 112 Maintenance and Service 11 3 Service Form GYD 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 Please obtain RA prior to return of item 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 12 12 1 Appendix A Syntax and Definitions Definition of lt string gt For convenience the 1928 C recognizes double quoted single quoted and unquoted strings with certain restrictions as detailed below Any of these forms may be used where a lt string gt parameter is required 1 lt string gt using double quotes this is a string 2 lt string gt using single quotes this is a string 3 lt string gt using no quotes thisisastring A description of each type of lt string follows 1 lt string gt defined using double quotes A double quote indicates that a string follows
67. er this EULA only as part of a permanent sale or transfer of the DEVICE provided you retain no copies of the SOFTWARE If the SOFTWARE is an upgrade any transfer must also include all prior versions of the SOFTWARE This transfer must also include the Certificate of Authenticity label The transfer may not be an indirect transfer such as a consignment Prior to the transfer the end user receiving the SOFTWARE must agree to all the EULA terms e Consent to Use of Data You agree that MS Microsoft Corporation and their affiliates may collect and use technical information gathered in any manner as part of product support services related to the SOFTWARE MS Microsoft Corporation and their affiliates may use this information solely to improve their products or to provide customized services or technologies to you MS Microsoft Corporation and their affiliates may disclose this information to others but not in a form that personally identifies you e Links to Third Party Sites You may link to third party sites through the use of the SOFTWARE The third party sites are not under the control of MS or Microsoft Corporation and MS or Microsoft are not responsible for the contents if any third party sites any links contained in third party sites or any changes or updates to third party sites MS or Microsoft Corporation is not responsible for webcasting or any other form of transmission received from any third party sites MS or Microsoft Corporation are prov
68. ers in the range 0 to 65535 decimal or 0 to FFFF hexadecimal Hexadecimal numbers are represented using the digits 0 9 and the characters A F A hexadecimal number has the following format H lt hexadecimal gt Where H mandatory octal number header lt hexadecimal gt hexadecimal digits 0 9 and A F Example All numbers below represent the decimal value 127 H7f H007F h7f 13 13 1 13 2 Appendix B Error Messages Introduction The communication errors can be retrieved with the following commands ERR or ERRSTR The descriptions of the returned errors are detailed in the next sections Command Errors Command Errors are associated with the conversion of the data received into the commands and their parameters parsing Incorrect syntax incorrect parameters and improper command format will generate these errors Any command error will cause the Command Error bit bit 5 in the Standard Event Status Byte to be set 104 Numeric Type Not Defined Generated during the parsing of a number and an undefined number type is encountered 106 Digit Expected Generated during the parsing of a number and the parser encounters a non number when a number is expected 107 Digit Not Expected Generated during the parsing of a number and the parser encounters a number when a different character is expected 115 Identifier Not Valid Generated when a parameter is not valid or not properly formed 116 Syntax E
69. exceed 50 characters In the example shown below a command string was created with semicolon 66 Communication Command Reference separating 5 queries The controller responds to this command string with a response that has 5 values using a comma as a separator COMMAND STRING PM P PM ATT PM L ERR INSTRUMENT RESPONSE 1 2450 1 810 0 8 3 Optical Power Meter Command Description 8 3 1 Command Glossary Root level Commands Queries Summary Number of f Page Name Paramators Function No IDN NONE Identification query 69 RCL 1 Recall configuration settings 69 SAV 1 Save configuration settings 69 ADDRess 1 Sets the instrument s USB address 70 ADDRess NONE Returns the instrument s USB address 70 ERRors NONE Returns errors generated since the last query 70 ERRSTR NONE Returns errors and their corresponding error text generated since the last 71 query Table2 Root level Commands Queries Summary Tree level Commands Queries Summary Number of Page Name Parameters penelen No DISP BRIGHT 1 Sets the backlight level of the display and the keypad 68 DISP BRIGHT NONE Returns the backlight level of the display and the keypad 68 PM ANALOGFILTER 1 Sets the analog filter to desired value 71 PM ANALOGFILTER NONE Returns the analog filter setting 71 PM ANALOG IMP 1 Sets the analog input impedance to desired value 72 PM ANALOG IMP NONE Returns the analog input impedance value 72 PM ANALOG OUT 1 Sets the analog output range to desi
70. f a new detector for the first time The meter will thereafter remember the last five connected detectors and enter their last used measurement mode Since dB and REL are relative measurements these units are available in the math field only Use the Math Configuration screen to specify a desired reference value and to select a desired operation The following instructions assume familiarity with the meter s functions They also include steps to incorporate background correction and assume that the experimental setup under fills and does not saturate or damage the detector CW Measurements with 918D or 818P Detectors This section describes the procedure for making basic optical power measurements while properly removing the influence of ambient light and other drift effects e With a918D also 818 XX lower power detectors with proper adapters or 818P Series Detector connected to the meter turn the meter on Press the Mode key and then select CW Continuous with the Navigation keys Use the ESC key to return to the Main screen Set Range to Auto and press the Lambda A key to set the measurement wavelength to the desired value Performing Basic Measurements 55 5 4 e Cover or otherwise block the light source being measured and then press the Zero key to turn the Offset on This effectively removes any background signal from subsequent measurements e Uncover the source so that it illuminates the detector and note
71. f transmitting a message over a communication bus and the instrument exits remote mode 303 Input Buffer Overflow Error generated when the system parser runs out of space during reception of command It may occur if commands are not terminated correctly Input buffer is 1 024 characters long 304 Output Buffer Overflow Error generated when the system parser runs out of space for query results It may occur if query results in too much data to be returned in a single response or if multiple command queries are issued but not read Output buffer is 4 096 characters long 305 Parser Buffer Overflow Error generated when the system parser runs out of space for commands A command is received into the input buffer then transferred to the parser buffer This error is generated if the command in the input buffer is too large to fit into the available space in the parser buffer It is usually generated when commands Appendix B 13 4 are sent to the instrument faster than it can process Parser buffer is 2 048 characters long Device Errors Device Errors are associated with some system condition that affects the operation of the meter Errors associated with data reading will set the appropriate bit but will not generate an error message to avoid jamming the error queue or the interface 701 Detector Calibration Read or Write Failed An error was encountered during a read write operation to the calibration EPROM in the detect
72. ging options The Help About will show information about the application including firmware version when an instrument is connected and communicating 7 1 7 2 7 2 1 7 2 2 7 2 3 Computer Interfacing General Guidelines The 1928 C Optical Power Meter has a USB computer interface port used to send commands to the instrument from a host PC The connection to a computer is done via a USB cable Type A Male Connector to Type Mini B Male Connector The commands supported by the Optical Power Meter can be divided into the following two categories commands that cause the instrument to take a desired action and commands queries that return a stored value or state of the Optical Power Meter Query commands are always terminated by a question mark It is recommended that when a query command is sent the response to that command from the Optical Power Meter be read before issuing any other command Set commands on the other hand are used to configure setup the Optical Power Meter for a desired mode of operation These commands take at least one parameter The subsequent sections in this chapter detail the USB communication protocols supported by the Optical Power Meter Computer Interface Terminology Listed below are the key abbreviations and concepts used in the command reference section Section 8 of this manual lt gt Delimiting Punctuation For the purposes of this manual any string enclosed by lt g
73. going you may install or enable on a DEVICE systems utilities resource management or similar software solely for the purpose of administration performance enhancement and or preventive maintenance of the DEVICE e Ifyou use the DEVICE to access or utilize the services or functionality of Microsoft Windows Server products such as Microsoft Windows Server 2003 or use the DEVICE to permit workstation or computing devices to access or utilize the services or functionality of Microsoft Windows Server products you may be required to obtain a Client Access License for the DEVICE and or each such workstation or computing device Please refer to the end user license agreement for your Microsoft Window Server product for additional information e NOT FAULT TOLERANT THE SOFTWARE IS NOT FAULT TOLERANT NEWPORT HAS INDEPENDENTLY DETERMINED HOW TO USE THE SOFTWARE IN THE DEVICE AND MS HAS RELIED UPON NEWPORT TO CONDUCT SUFFICIENT TESTING TO DETERMINE THAT THE SOFTWARE IS SUITABLE FOR SUCH USE NO WARRANTIES FOR THE SOFTWARE The SOFTWARE is provided AS IS and with all faults THE ENTIRE RISK AS TO SATISFACTORY QUALITY PERFORMANCE ACCURACY AND EFFORT INCLUDING LACK OF NEGLIGENCE IS WITH YOU ALSO THERE IS NO WARRANTY AGAINST INTERFERENCE WITH YOUR ENJOYMENT OF THE SOFTWARE OR AGAINST INFRINGEMENT IF YOU HAVE RECEIVED ANY WARRANTIES REGARDING THE DEVICE OR THE SOFTWARE THOSE WARRANTIES DO NOT ORIGINATE FROM AND ARE NOT BINDING ON MS e No Li
74. he detector Argument Type Description Value int Wavelength in nanometers nm Related Commands PM Lambda PM MAX Lambda PM MIN Lambda Communication Command Reference 83 8 3 3 45 8 3 3 46 8 3 3 47 8 3 3 48 PM Lambda Description Syntax Remarks Response Wavelength Wavelength query PM Lambda The PM Lambda query returns the selected wavelength in nanometers This is the wavelength used to look up the responsivity from the calibration data Type Description int Wavelength in nanometers nm Related Commands PM Lambda PM MAX Lambda PM MIN Lambda PM MAX Lambda Description Syntax Remarks Response Wavelength Maximum wavelength query PM MAX Lambda The PM MAX Lambda query returns the longest calibrated wavelength in nanometers If no detector is preset the max lambda for the last read detector is returned Type Description int Wavelength in nanometers nm Related Commands PM MIN Lambda PM MAX Power Description Syntax Remarks Response Power Maximum power query PM MAX Power The PM MAX Power returns current range s maximum readable power Type Description float Power in Watts PM MIN Lambda Description Syntax Remarks Minimum wavelength query PM MIN Lambda The PM MIN Lambda query returns the shortest calibrated wavelength in nanometers If no detector is preset min lambda for the last read detector is returned 84 C
75. iding these links to third party sites to you only as a convenience and the inclusion of any link does not imply an endorsement by MS or Microsoft Corporation of the third party site 128 Notice Regarding Security To help protect against breaches of security and malicious software periodically back up your data and system information use security features such as firewalls and install and use security updates No Rental Commercial Hosting You may not rent lease lend or provide commercial hosting services with the SOFTWARE to others Separation of Components The SOFTWARE is licensed as a single product Its component parts may not be separated for use on more than one computer Additional Software Services This EULA applies to updates supplements add on components product support services or Internet based services components Supplemental Components of the SOFTWARE that you may obtain from Newport MS Microsoft Corporation or their subsidiaries after the date you obtain your initial copy of the SOFTWARE unless you accept updated terms or another agreement governs If other terms are not provided along with such Supplemental Components and the Supplemental Components are provided to you by MS Microsoft Corporation or their subsidiaries then you will be licensed by such entity under the same terms and conditions of this EULA except that i MS Microsoft Corporation or their subsidiaries providing the Supplemental Components
76. ig This action displays the Range Configuration screen Here the user can select a certain range or even Auto Range with the Navigation Enter keys The number of ranges depends on the detector used see Section 2 3 2 Once a range is selected the instrument returns to the main screen While in Range Configuration screen the user may cancel the selection by hitting the ESC key Mode OM Range Q10 V Cont 400 nm 37 89 Hint Press Setup to enter measurement setup Auto Config Figure 22 Manual Range mode Mode Range Auto 400 nm 37 89 Hint Press Manual CW Cont etup to enter measurement setup Figure 24 This screen is displayed after pressing the Config soft key 36 System Operation Mode The Mode key displays a screen as in Figure 25 Using Navigation Enter keys the user can select different measurement modes or display modes according to his her application The ESC key cancels the selection and brings the instrument back to the main screen Hold The Hold key toggles between holding the current measurement and updating regularly When in Hold mode the numeric display freezes and the upper left corner of the display reads Hold see Figure 26 The display starts updating when the Hold key is pressed again The ESC key has no effect on Hold status Filter The Filter key allows the user to apply Analog and or Digital filters to the detector signal Pressing this key
77. illoscope or voltmeter and the user reads 0 125 V the detector power is 125 mW The selectable analog output levels are given in Table 5 Output Range 0 1 2 Full Scale Voltage Load 2 1 MQ 1V 2V 5V Table 5 Analog Output Range Table 104 Principles of Operation 9 10 9 10 1 9 10 2 Measurement Considerations This section describes detector characteristics optical and electrical considerations and environmental influences on optical measurements In general measurement accuracy is limited by the accuracy of the detector calibration Accurate measurements however are also dependent upon proper set up control of temperature and illumination conditions and understanding the factors that affect optical measurements Detector Calibration and Uncertainty Newport Corporation calibrates its detectors using secondary standards directly traceable to the United States National Institute of Science and Technology NIST to Great Britain s National Physical Laboratory NPL or to National Research Council NRC of Canada The details and uncertainty of the calibration procedure vary with each detector model but a detailed description of the calibration results is supplied with each individually calibrated detector In general detector calibration uncertainty varies from 1 to 8 and varies with wavelength Each detector will also have some variation in response over its surface Therefore for the mos
78. ily The measurement modes are grouped naturally into three categories CW Peak to Peak Pk Pk and Pulsed Each will be discussed in the sections below The 1928 C sets the measurement to a detector specific default mode depending on the detector used All Newport detectors have internal logic or calibration modules Based on the data stored in detectors the instrument knows to auto configure itself and sets up the mode range filter rate etc The user in the setup screen can change the detector specific default mode The basic measurement techniques for using the 1928 C are covered in the following sections Refer to Table 1 for a review of the 1928 C s functions and measurement capabilities 54 Performing Basic Measurements 5 3 a aS E El gE Se has Detector Sia alul5 Family Mode gt lt x ar ar xe xe o op cw Continuous X X X X X X CW Single xX xX xX X xX X Low CW Power Integrate X X X X 918D Pk Pk Series Continuous X X X X X X Pk Pk Single X X X X X X cw High Continuous X X X X X X X Power CW Single xX x x x x x x 818P CW Series Integrate X X X X Pulse Energy Continuous X X X X X 818E Pulse Series Single xX X xX xX X Table 1 Available Measurement Modes and Valid Units 66399 The modes with the symbol are the default measurement modes The Optical Power Meter enters these modes when it determines the presence o
79. imum value Return statistics buffer maximum minimum value Return statistics buffer standard deviation value Selects the units for readings Returns an integer indicating the selected units Sets the user reference value for use in relative or dB readings Returns the user reference value Sets the user reference value for use in relative or dB readings as the present reading Sets the zeroing value with the present reading Sets the zeroing value Gets the zeroing value Table 7 Legacy Commands Reference 15 15 1 15 2 15 3 15 4 15 5 Appendix D Sample Programs Programming Samples The CD will install some simple programming samples to get computer interfacing started These are minimal samples and provided only for reference LabVIEW LabVIEW programming samples separated in folders based on version of LabVIEW compiled with SampleQuery vi demonstrates the use of the drivers Microsoft Visual Basic A zip file in the application folder contains a simple Visual Basic project for communicating with the meter Microsoft Visual C A zip file in the application folder contains a simple Visual C project for communicating with the meter Microsoft NET A zip file in the application folder contains a simple NET project for communicating with the meter 124 Appendix D This page is intentionally left blank 16 16 1 Appendix E Disassembly Instructions NOTE These disassembly
80. ion bin 0 Reserved lto5 Valid configuration settings Related Commands SAV SAV Description Save Configuration Settings Syntax SAV bin Remarks The SAV command saves the present state of the power meter in its non volatile flash memory A particular state is then recalled using the RCL command If any one of these parameters are changed the present state of the power meter will automatically be saved in configuration setting 1 When the power meter is reset the state of the meter defaults to configuration setting 1 The setup parameters saved include Display brightness level 70 Communication Command Reference 8 3 3 4 8 3 3 5 8 3 3 6 Argument bin USB address Color scheme Measurement display mode Custom wavelengths Value Description 0 Reserved lto5 Valid configuration settings Related Commands RCL ADDRess Description Syntax Remarks Argument Value USB address command ADDRess value The ADDRess command sets the Optical Power Meter USB address After changing USB address the communication with the Optical Power Meter has to be re initialized Value Description 0 Reserved Ito 31 Valid USB address range Related Commands ADDRess ADDRess Description USB address query Syntax ADDRess Remarks The ADDRess query returns the Optical Power Meter s USB address Response Value Description address 0 Reserved Ito 31 Valid USB address range Related Commands ADDRess
81. ion 1 1 6 2 Verify that the AC line cord is firmly connected to both the unit and the MAINS power outlet 3 Verify that there is power to the MAINS power outlet 10 2 Analog Output Problems Problem Solution 1 There is no AC signal at the analog output Check if the 5 Hz Analog Filter is on 10 3 Questions and Answers Q I am trying to update the firmware but my USB flash drive is not working I don t see any light on the memory stick A The USB flash drive needs to be WinCE compatible WinCE is the operating system of 1928C power meter Q Is the detector hot swappable 110 Troubleshooting A Yes you can swap the detector without having to turn off the power meter Q Is it possible to write the measurement data into Spreadsheet A Yes you can plug in a USB flash drive into the power meter and save the data from the Statistics screen Q Is it possible to use a third party detector with the 1928 C Optical Power Meter A It may be possible for some measurements by purchasing a special adaptor Contact Newport Corporation for availability and details Q I would like to change the configuration back to the factory default setting How can I do that A Turn off the Power Meter Hold down both ZERO and HOLD buttons and turn on the Power Meter A message window appears Choose YES or NO for reset by using the left right arrow keys and press enter Q The display shows som
82. ity with attenuator available in the calibration module for 818 detectors Related Commands PM ATT PM ATT Description Attenuator enable query Syntax PM ATT Remarks The PM ATT query returns 1 when using attenuator calibration 0 when calculating power without attenuator data Response Value Description attenuator 0 Calibrating power without attenuator 1 Calibrating power using attenuator 74 Communication Command Reference 8 3 3 16 8 3 3 17 8 3 3 18 8 3 3 19 Related Commands PM ATT PM ATTSN Description Attenuator serial number query Syntax PM ATTSN Remarks The PM ATTSN query returns the serial number of the attenuator When no detector is found the Optical Power Meter responds with no detector Response Type Description serialnumber string Serial number of the attenuator Related Commands PM DETMODEL PM DETSN PM AUTO Description Auto range enable command Syntax PM AUTO mode Remarks The PM AUTO command sets the power ranging to either manual or automatic Argument Value Description mode 0 Manual Optical Power Meter ranging 1 Automatic Optical Power Meter ranging Related Commands PM AUTO PM RANge PM AUTO Description Auto range mode query Syntax PM AUTO Remarks The PM AUTO query returns a value to indicate if auto ranging is enabled or not Response Value Description mode 0 Manual Optical Power Meter ranging 1 Automatic Optical Power Meter ranging Related Comman
83. l Query Syntax PM DS INTerval Parameters None Function This query returns the interval in milliseconds currently used for data storing Related Commands PM DS SIZE PM DS SIZE PM DS INTerval PM DS SAVEBUFFER Description Save the current Data Store data to a file Syntax PM DS SAVEBUFFER filename Remarks The PM DS SAVEBUFFER command saves the current user Data Store to a file on the WinCE compatible USB Flash Disk plugged into the USB Host port on the front of the Optical Power Meter Argument Type Description Filename string The filename that will be created or overwritten on the USB Flash Disk containing the measurments stored in the Data Store Communication Command Reference 81 8 3 3 39 8 3 3 40 8 3 3 41 PM DS SIZE Description Size of the Data Store query Syntax PM DS SIZE lt size gt Parameters The parameter lt size gt is of type lt integer gt in the range 1 to 250000 The parameter represents the size of the data buffer to be used for data storing Function This command sets the size of the buffer used for data storing NOTE The data buffer is cleared automatically when this command is used and all previously stored data will be gone Related Commands PM DS SIZE PM DS INTerval PM DS INTerval PM DS SIZE Description Data Store Buffer Size Query Syntax PM DS SIZE Parameters None Function This query returns the data store buffer size Returns lt size gt is of type lt number gt an
84. measurements of time varying signals from semiconductor photodiode detectors Since optical power is a zero bounded positive quantity signals from a detector observing such modulated light will similarly be zero bounded positive signals To make a peak to peak measurement the 1928 C must be able to capture both the maximum and minimum values of a detector signal This is accomplished by sampling the signal 102 Principles of Operation 9 8 DC AVERAGE AC PEAK TO PEAK DC AC PEAK Figure 61 Time Varying Signal Measurements Many different measurements can be made on different portions of a time varying signal The most common are DC power peak power and peak to peak power Integration of Detector Signals The 1928 C provides for making measurements that integrate incoming power detector signals to obtain energy via the CW Integrate mode In CW Integrate mode the display units indicate Joules since energy is the time integral of power t ti s E f P A dt f DURT i RA to As the detector signal actually consists of a stream of digitized values the integral becomes a numerical approximation using the trapezoid method See Figure 62 Detector Signal Numerical Integration Trapezoid Method a Magnitude of the Integrated Result Figure 62 Integrated Energy Via a Trapezoid Approximation The INTG measurement mode performs a discrete integration at a 400 Hz sample rate Principles of Operation 103
85. meters nm see Figure 30 on page 37 The screen has two columns The left column displays the common wavelength values used in the industry while the right column has custom values When the user selects one of the predefined wavelengths in the left column the 1928 C looks up the wavelength in the responsivity table in the detector calibration module If that exact value is found the system will use the corresponding responsivity for that particular wavelength If the value is not found the system will calculate the responsivity using interpolation The right column in the Wavelength screen gives the user the option to set custom wavelengths To do so with the Navigation keys bring the cursor on top of one of the numbers The rightmost Soft key becomes Edit Value Hit this key to edit the custom number A white cursor appears on the first digit Press the Up Down navigation keys to change the number and the Left Right keys to move to the next digit When finished hit Enter The new custom wavelength will be stored Press Esc to return to the main measurement screen Display Color In a laboratory environment and especially when one uses protective eyewear it may be desirable to change the meter display color to accommodate the eyewear color The instrument has predefined color schemes that can be changed any time Figure 34 Mode nt Mode CW Cont ange Range Auto A m Miset 37 692 yW 400 nm Offset 37 892 uw 2 2 1
86. n new measurements are taken Related Commands PM DS BUFfer PM DS BUFfer Description Data Store buffer behavior selection query Syntax PM DS BUFfer Remarks The PM DS BUFfer query returns the value of the Data Store buffer behavior Argument Type Description Behavior int See PM DS BUFfer for a definition of the behavior status PM DS CLear Description Clear the Data Store of all data Syntax PM DS CLear Remarks The PM DS CLear command resets the data store to be empty with no values Argument Type Description none E PM DS Count Description Data Store data item count query Syntax PM DS Count Remarks The PM DS Count query returns the number of measurements that have been collected in the Data Store Argument Type Description count int The number of measurements that have been collected Communication Command Reference 79 8 3 3 33 8 3 3 34 8 3 3 35 PM DS ENable Description Syntax Remarks Argument enable Enable Data Store Collection PM DS ENable enable The PM DS ENable enables or disables the collection of measurements in the Data Store Value Description 0 Disabled 1 Enabled Data will be collected after the PM DS ENable command has been called with a parameter of 1 Data collection will stop when the PM DS ENable command has been called with a parameter of 0 or when a fixed size data buffer is full Related Commands PM DS ENable PM DS ENable Description Syntax
87. nal input to the detector If free space beam measurements are desired using an attenuator will often improve the signal to ambient signal noise level Wavelength specific filters such as optical cutoff band pass or spike filters can be used if the signal wavelength spectrum permits Other techniques to reduce stray light include using apertures placing the detector in a box or other housing to shield the surface from light or air currents and turning off room and other polluting light sources Signal Filtering The 1928 C Optical Power Meter offers the user the option to filter the detector signal There are two programmable filters that can be used individually or together to condition the detector signal the Analog Filter and the Digital Filter The Analog Filter is a hardware based programmable low pass filer The user can select the following settings 5Hz 1kHz 12 5kHz and 250kHz This flexibility is offered to the user to improve the measurement precision for different detectors It is well known that white noise has large spectrum The noise level increases with bandwidth The higher the noise the higher the minimum signal that can be measured The quality of the measurement can be linked to the signal to noise ratio SNR the higher the SNR the better the measurement precision of very small signals In order to increase the SNR the user may choose to cut the bandwidth of the power meter depending on the detector signal
88. nance or service of the system or optional equipment beyond the procedures outlined in this manual Any problem that cannot be resolved should be referred to Newport Corporation Copyright and Trademark Information WINDOWS is a registered Trademark of Microsoft Corporation LabVIEW is a registered Trademark of National Instruments INC Visual Basic is a registered Trademark of Microsoft Corporation Visual C is a registered Trademark of Microsoft Corporation vii Preface 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 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
89. navigate to Range Type Rng type and change the range to Auto Range Mode Also the user has another option to bring the Optical Power Meter back into the Auto Range Mode This can be done from the default screen where the user can change the Range to Auto Range Mode with the Range Dedicated key see Section 4 2 5 Attenuator On Off If the detector is equipped with an integrated attenuator e g 918D Series the 1928 C detects its status ON or OFF and displays it in the Attenuator field The user has the option to manually set the attenuator to ON or OFF for detectors that have attenuators that can be manually mounted on the detector e g 818 Series To change the attenuator status bring the cursor on top of the Attenuator field Hit the Enter key A drop down menu appears with the ON OFF option Select the setting and hit Enter Analog and Digital Filter Selection With the Navigation Selection keys bring the cursor on top of the Analog or Digital field Hit the Enter key A drop down menu appears with the available filter settings Select the desired filter and hit Enter The Analog and Digital filter configuration can be accessed any time with the Filter dedicated key Refer to Section 4 2 5 for details Units Selection With the Navigation Selection keys bring the cursor on top of the Units field Hit the Enter key A drop down menu appears with the available units Select the desired units and hit Enter Mode Selection
90. nd Soft key is labeled Display OFF If this key is pressed the system returns to the main measurement screen and the Math field disappears Measurement Correction Settings The 1928 C Optical Power Meter provides users the capability to correct actual measurements taken by it through a Correction Settings screen This screen can be accessed by pressing the Correction soft key in Measurement Settings screen Figure 42 The Measurement Settings screen as described earlier can be accessed by pressing the Setup key from main measurement screen s Wavelength Detector 818P 001 12 The Correction Settings screen Fane oil ion Figure 43 allows users to enter two Range type Det temp No Therm 2 multiplier values labeled Attenuator fl Responsivity Multiplier 1 M1 and Multiplier faiti hice i p Pp Digital filter fi Offset 2 M2 besides an Offset value Units Num Digits The corrected measurement is arrived Midi Spot size at using the formula shown below Corrected measurement Actual measurement M1 Offset M2 Figure 42 Measurement Settings The default value for the two multipliers is 1 0 and the offset is 0 0 If any of these three parameters System Operation 47 are changed from their default values the main measurement screen shows the corrected measurement A new field called Detector appears Multiplier 1 at the bottom of the main screen that Offset dis
91. nergy measurements are related to a measured detector signal S in the following way S P or E R A Where R Detector responsivity at S Detector signal Semiconductor 918D 818 Series Low Power detectors provide a current signal The 1928 C is capable of 10 pA resolution in order to provide the highest sensitivity performance with these detectors 100 Principles of Operation 9 5 9 6 Thermopile 818P Series High Power detectors provide a small voltage signal The 1928 C is capable of 76 3 nV resolution in order to reach the sensitivity limits of thermopile detectors Pyroelectric 818E Series Energy detectors deliver a peak voltage signal The1928 C is capable of capturing 2 usec rise time voltage spikes so that it may be operated with the fastest of these detectors Thermopile Detector Signals Thermopile detectors respond with a voltage signal that slowly changes in incident optical power The time constant of most thermopile detectors is on the order of 1 to 10 seconds Input Optical Signal Thermopile Response Displayed Signal 1sec 5 sec Figure 58 Thermopile Signals exhibit 1 to 10 second time constants Pulse Energy Detector Signals A Newport Energy detector will respond to a single radiant energy pulse with a voltage pulse at its BNC output This pulse exhibits a sharp voltage rise to a peak followed by slower voltage decay that undershoots zero volts before settli
92. ng back to zero volts When a detector is operated within its proper limits the voltage difference from immediately before the sharp rise to the peak is linearly proportional to the radiant energy If a second pulse arrives before the undershoot rises back to zero volts the voltage rise from this pulse will start from an initial negative value At sufficient energy pulse repetition rates a negative baseline voltage will develop from which the voltage rise must now be measured to achieve accurate energy readings The 1928 C contains baseline capture circuitry that maintains its accuracy specifications over rep rates ranging from single pulse to 10 kHz Principles of Operation 101 9 7 VOLTS 0 0 02 0 04 0 06 0 08 0 10 TIME sec Figure 59 Typical Newport Energy Detector Signal Waveform An energy detector signal sharply rises to a peak value and then decays going somewhat negative before finally returning to zero The energy in the radiant pulse is proportional to the height of the peak measured from immediately before the sharp rise VOLTS 0 0 2 0 4 0 6 0 8 1 0 TIME sec Figure 60 Negative Baseline Voltage Negative Baseline Voltage Due to a Pulse Train shown If a laser pulse arrives before the previous Energy detector signal has fully decayed the detector signal rises from the present decay point of the previous signal Peak to Peak Photodiode Detector Signals The 1928 C enables one to make peak to peak
93. nner that protects human health and the environment For information about where the user can drop off the waste equipment for recycling please 18 Safety Precautions 1 2 1 2 1 contact your local Newport Corporation representative See Section 16 for instructions on how to disassemble the equipment for recycling purposes Warnings and Cautions The following are definitions of the Warnings Cautions and Notes that are used throughout this manual to call your attention to important information regarding your safety the safety and preservation of your equipment or an important tip WARNING Situation has the potential to cause bodily harm or death CAUTION Situation has the potential to cause damage to property or equipment NOTE Additional information the user or operator should consider General Warnings Observe these general warnings when operating or servicing this equipment e Heed all warnings on the unit and in the operating instructions Do not use this equipment in or near water e This equipment is grounded through the grounding conductor of the power cord Route power cords and other cables so they are not likely to be damaged Disconnect power before cleaning the equipment Do not use liquid or aerosol cleaners use only a damp lint free cloth Lockout all electrical power sources before servicing the equipment To avoid fire hazard use only the specified fuse s with the correct type number v
94. 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 FITNESS 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 2009 2009 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 Part No 90022689 Rev B Firmware version 1 1 0 vi Preface Confidentiality amp Proprietary Rights Reservation of Title The Newport programs and all materials furnished or produced in connection with them Related Materials contain trade secrets of Newport and are for use only in the manner expressly permitted Newport claims and reserves all rights and
95. ns the TRIGGER START condition Related Commands PM TRIG START PM TRIG STOP Description This command sets the optional stop event Syntax PM TRIG STOP lt option gt Parameters The parameter lt option gt is of type lt number gt and is an integer from 0 to 6 Argument Value Description option 0 The measurement never stops 1 Reserved 2 Measurement stops when a designated Soft key is pressed 3 Measurement stops when PM TRIG STATE 0 command is issued Related Commands PM TRIG STOP PM TRIG STOP Description Trigger STOP Query Syntax PM TRIG STOP Parameters None Function This query returns the TRIGGER STOP condition Related Commands PM TRIG STOP PM TRIG STATE Description This command sets the trigger state Syntax PM TRIG STATE lt option gt Communication Command Reference 93 8 3 3 77 8 3 3 78 Parameters The parameter lt option gt is of type lt number gt and is an integer 0 or 1 Argument Value Description option 0 Trigger is armed The system waits for a trigger start event to occur in order to make a measurement 1 System is triggered and at least one measurement occurred Related Commands PM TRIG STATE PM TRIG STATE Description Trigger STATE Query Syntax PM TRIG STATE Parameters None Function This query returns the TRIGGER STATE condition Related Commands PM TRIG STATE PM UNITs Description Units select Syntax PM UNITS units Remarks The PM UNITS command select
96. nternational symbol implies an alternating voltage or current ON Figure6 On Symbol The symbol in the figure above represents a power switch position on the Model 1928 C Optical Power Meter This symbol represents a Power On condition OFF O Figure7 Off Symbol The symbol in the figure above represents a power switch position on the Model 1928 C Optical Power Meter This symbol represents a Power Off condition Fuses lt Safety Precautions 17 1 1 9 1 1 10 1 1 11 Figure 8 Fuse Symbol The fuse symbol in the figure above identifies the fuse location on the Model 1928 C Optical Power Meter Frame or Chassis Figure 9 Frame or Chassis Terminal Symbol The symbol in the figure above appears on the 1928 C Optical Power Meter This symbol identifies the frame or chassis terminal USB Connector Symbol e lt gt Figure 10 USB connector Symbol The USB connector symbol in the above figure identifies the location of the USB communications connector Waste Electrical and Electronic Equipment WEEE Figure 11 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 ma
97. oltage and current ratings as referenced in the appropriate locations in the service instructions or on the equipment Only qualified service personnel should replace fuses e To avoid explosion do not operate this equipment in an explosive atmosphere e Qualified service personnel should perform safety checks after any service Safety Precautions 19 1 2 2 General Cautions Observe these cautions when operating or servicing this equipment e If this equipment is used in a manner not specified in this manual the protection provided by this equipment may be impaired e To prevent damage to equipment when replacing fuses locate and correct the problem that caused the fuse to blow before re applying power e Do not block ventilation openings e Do not position this product in such a manner that would make it difficult to disconnect the power cord Use only the specified replacement parts Follow precautions for static sensitive devices when handling this equipment e This product should only be powered as described in the manual e There are no user serviceable parts inside the 1928 C Optical Power Meter e To prevent damage to the equipment read the instructions in the equipment manual for proper input voltage e Adhere to good laser safety practices when using this equipment 1 2 3 Summary of Warnings and Cautions The following general warning and cautions are applicable to this instrument WARNING Before
98. ommunication Command Reference 8 3 3 49 8 3 3 50 8 3 3 51 Response Type Description Wavelength int Wavelength in nanometers nm Related Commands PM MAX Lambda PM MIN Power Description Minimum power query Syntax PM MIN Power Remarks The PM MIN Power returns current range s minimum readable power Response Type Description Power float Power in Watts Related Commands PM MAX Power PM MEAS TIMEOUT Description Measurement timeout set command Syntax PM MEAS TIMEOUT value Remarks This command sets the measurement timeout period This value is used for making the following measurements 1 Peak to peak measurements These measurements are updated once every timeout period when the power meter is in Peak Peak Continuous mode 2 Auto ranging in Pulse Continuous mode The power meter automatically shifts to a lower range once every timeout period when it determines that no pulse measurements could be taken in the existing range Users must set this timeout value to 250ms or larger than their pulse repetition rate in order to be able to perform measurements accurately Argument Type Description Value int Timeout value milliseconds Related Commands PM MEAS TIMEOUT PM MEAS TIMEOUT Description Measurement timeout query Syntax PM MEAS TIMEOUT Remarks The PM MEAS TIMEOUT query returns the selected measurement timeout value in milliseconds Communication Command Reference 85 8 3 3 52
99. optical power meter Specifications Physical Specifications Dimensions Weight Enclosure Connectors Power Display Display Update Rate Operating Environment Storage Environment Altitude Installation Category Pollution Degree Use Location 5 24 x 8 5 x 8 07 inch 133 x 216 x 205 mm max 5 5 lb Metal case painted Optical Detector 15 Pin D Sub Analog Output 3 5 mm Jack USB A Host mini B USB Device AC Input IEC EN 60320 1 C14 receptacle 100 120 220 240VAC 10 50 60 Hz 35 Watts autoranging Graphical LCD 4 VGA 4 inch diagonal up to 20 Hz for selected graphical modes 5 C to 40 C lt 70 RH non condensing 20 C to 60 C lt 90 RH non condensing lt 3000m I 2 Indoor use only General Information 23 2 3 2 Electrical Specifications DC Current Measurement Low Power Semiconductor Photodiode Signal Range 0 1 2 3 4 Full Scale Current 2 50 pA 25 0 pA 250 pA 2 50 mA 25 mA Resolution Filtered 10 pA 100 pA 1 00 nA 10 0 nA 100 nA Bandwidth Unfiltered 480 Hz 4 kHz 43 kHz 170 kHz 500 kHz Accuracy Filtered 0 2 0 2 0 2 0 2 0 2 ea Measurement 1 0 1 0 1 0 1 0 1 0 Signal to Noise Ratio 120 dB 120 dB 120 dB 120 dB 120 dB Peak Peak Current Measurement Low Power Semiconductor Photodiode Signal Range 0 1 2 3 4 Full Scale Current 2 50 pA 25 0 pA 250
100. or If problem persists contact the factory 703 Optical Power Meter set to defaults due to Firmware update After upgrading the firmware in some cases the changes are significant enough to require resetting the instrument to factory defaults 704 User reference cannot be changed stored while you are in units of Watts or dBm Change to dB or Rel to set the user reference value User reference can only be stored in dB or Rel mode 705 Illegal data store parameter change Queue cleared An action that affects the data store caused the data store queue to be cleared 706 Digital Filter Interval changed must not be greater than Data Store interval The digital filter interval cannot be greater than the data store interval 707 Digital Filter Disabled with External Trigger Digital filter must be disabled during external trigger mode 708 There is no new data for a statistics update No new data has been stored in the data store since the last statistics update 709 Statistics are not calculated while Data Store is running User attempted to compute statistics while data store was active Turn off data store and compute 120 Appendix B This page is intentionally left blank 14 Legacy Commands ATTN_n ATTN_n ATTNSN n AUTO n AUTO n CALDATE n CALTEMP n DETMODEL n DETSN n DSBUF n DSBUF n DSCLR n DSCNT_n DSE_n DSE n DS_n SFREQ SFREQ DSSIZE_n DSSIZE_n DSUNITS_n FILTER_n FILTER n
101. play a new integrated energy measurement every second The readings will start decreasing rapidly after the first couple of measurements due to the decline in heat flow from the relatively slow thermopile detector e When the displayed reading drops again to the point of essentially displaying the detector s noise component the individual stored readings may be retrieved via the USB interface Summing these readings will yield the pulse energy NOTE This method works best if the integrated result of the pulse signal is much larger than the integral of the detector s noise component If the integrated result of the pulse is not much larger then error in the measurement will arise due to the uncertainty generated by integration of the noise component terms NOTE The time constant of a thermopile detector determines the amount of time that one should expect to wait when making an integrated energy measurement of an optical pulse Typically an accurate value will be at 5 time constant after the arrival Performing Basic Measurements 59 5 9 RMS Measurements This section describes the procedure for making a basic signal RMS Root Mean Square measurement while properly removing the influence of ambient light and other drift effects The 1928 C begins and ends the signal RMS every second e With a 918D or 818P Detector connected to the meter turn the meter on Set the Mode to RMS Set the Range to Auto and press the Lambda
102. played value should now reflect the detector signal integration value NOTE This process assumes that ambient signals are not changing between the moments when the user zeros the display and when the measurement is made Measuring Laser Pulse Energy with an 818P Thermopile Detector Single Shot This application makes use of the 1928 C CW Integrate mode see Section 5 7 above When an optical pulse with energy E A is incident on a thermopile 818P Series a voltage signal is generated at the detector input as the heat pulse flows out to the cooling fins The sum of a series of integrated signals each one second long resulting from this heat pulse is a measure of the optical pulse energy see Figure 54 Performing Basic Measurements Input Optical Pulse Energy Resultant Voltage ve Pulse from Thermopile Integrate Voltage to find Z A EW pay Vod Figure 54 Measuring Laser Pulse Energy via a Thermopile in CW Integrate Mode E a A recommended procedure is e With an 818P High Power Detector connected to the meter turn the meter on Set the Mode to CW Continuous Set the Range to Auto and press the Lambda A key to set the measurement wavelength to the desired value Set Zero on and then change Mode to CW Integrate e Before the optical pulse arrives the display may reflect the integral of detector noise due to ambient temperature fluctuations e Trigger the laser pulse The display will dis
103. plays the actual measurement Multiplier 2 without any corrections Correction Settings Result Detector M1 Offset M2 Figure 43 Correction Settings 4 11 Display Modes The selection of various display modes can be done from the default screen by pressing the Mode soft key When the Mode selection screen is displayed Figure 44 the display mode can be selected from the second column Figure 44 Mode selection screen 4 11 1 Numeric Display The numeric display is the default display of the 1928 C The numeric display shows the current measured value up to enter Figure45 The Numeric display 48 System Operation 4 11 2 Min Max Bar The Analog Bar display mode shows a bar graph below the numeric display The bar graph is white and follows the value showed by the numeric display The minimum and maximum labels displayed just below the bar graph represent the input range the unit is currently set on For example if the unit is set on 109 99 uW range then the bar graph shows the same range of 0 to 109 99 uW In the middle of the NaC ales Bar bar graph the displayed number is the middle of the range The major ticks represent 10 of the range and the minor ticks represent 5 of the range If the Soft key labeled Show Max is selected the maximum value is retained and displayed in the bar graph with red color The red bar is updated with each measurement if the current measured valu
104. press the Lambda A key to set the measurement wavelength to the desired value Performing Basic Measurements 57 5 7 5 8 e Illuminate the detector and note the displayed value as the meter measures each laser pulse These readings represent the energies of the incident laser pulses The meter will display the last pulse energy measured until a new pulse arrives e Accurate measurements can be made for pulse repetition rates up to 10 kHz depending on the limitation of the specific detector in use of course Signal Integration Measurements 918D or 818P Detectors This section describes the procedure for making a basic signal integration measurement while properly removing the influence of ambient light and other drift effects The 1928 C begins and ends the signal integration every second e With a 918D or 818P Detector connected to the meter turn the meter on Set the Mode to CW Continuous Set the Range to Auto and press the Lambda A key to set the measurement wavelength to the desired value e Cover or otherwise block the light source being measured turn Zero on and then set the Mode to CW Integrate Immediately upon entering the integration mode the meter will begin to acquire and integrate data The display value may reflect the integration of noise due to ambient temperature fluctuations when using the 818P detectors or light fluctuations when using the 918D detectors e Uncover or trigger the source The dis
105. r conditioners and people walking past Energy Detector Temperature Effects Pyroelectric Newport Energy detectors are AC coupled devices and thus are not susceptible to temperature induced DC signal offsets or noise floor changes One generally does not need to take much precaution with pyroelectric detectors except to make sure that their damage threshold is not exceeded Ambient and Stray Light Ambient and stray light striking the detector should be considered when making a measurement Ambient light can be distinguished from dark current or the detector meter noise floor by either turning off or blocking the source and covering the detector face with opaque material such as a piece of black rubber Using the human hand to cover the detector is not advised because it emits a significant amount of infrared radiation and radiates a temperature significantly different from ambient With the detector covered a reading of the dark current may be made Next remove the material that is covering the detector and take another reading The difference is the ambient light level 106 Principles of Operation 9 10 6 NOTE Changes in ambient light levels can occur from such factors as turning room lights on or off or by moving people or equipment Remember if you can see your detector element then your detector can see the light bouncing off you The effects of ambient light are greatly reduced when using a fiber connectorized sig
106. re protected by international intellectual property laws and treaties Manufacturer MS and its suppliers including Microsoft Corporation own the title copyright and other intellectual property rights in the SOFTWARE The SOFTWARE is licensed not sold All rights reserved This End User License Agreement EULA is valid and grants the end user rights ONLY if the SOFTWARE is genuine Certificate of Authenticity for the SOFTWARE is included For more information on identifying whether your software is genuine please see http www microsoft com piracy howtotell IF YOU DO NOT AGREE TO THIS EULA DO NOT USE THE DEVICE OR COPY THE SOFTWARE INSTEAD PROMPTLY CONTACT NEWPORT FOR INSTRUCTIONS ON RETURN OF THE UNUSED DEVICES S FOR A REFUND ANY USE OF THE SOFTWARE INCLUDING BUT NOT LIMITED TO USE ON THE DEVICE WILL CONSTITUTE YOUR AGREEMENT TO THIS EULA OR RATIFICATION OF ANY PREVIOUS CONSENT GRANT OF SOFTWARE LICENSE This EULA grants you the following license You may use the SOFTWARE only on the DEVICE Restricted Functionality You are licensed to use the SOFTWARE to provide only the limited functionality specific tasks or processes for which the DEVICE has been designed and marketed by Newport This license specifically prohibits any other use of the software programs or functions or inclusion of additional software programs or functions that do not directly support the limited functionality on the DEVICE Notwithstanding the fore
107. red level 72 PM ANALOG OUT NONE Returns the analog output range 73 PM ATT 1 Selects if the attenuator s calibration data is included for power 73 calculation Returns setting if attenuator data should or should not be used 73 PMATT NON when calibrating the Optical Power Meter PM ATTSN NON Gets the attenuator serial number 74 PM AUTO 1 Sets the Optical Power Meter ranging to manual or automatic 74 PM AUTO NONE Returns 1 if automatic Optical Power Meter ranging is selected 74 PM CALDATE NONE Returns the calibration date of the detector 74 PM CALTEMP NONE Returns the temperature at which the calibration was 75 performed PM CORR 3 Sets the power measurement correction settings 75 PM CORR NONE Power measurement correction settings query 75 PM DETMODEL NONE Returns the model number of the detector 76 PM DETSIZE NONE Returns the detector surface area 76 PM DETSN NONE Returns the serial number of the detector 76 PM DIGITALFILTER 1 Sets the digital filter to desired value 77 Communication Command Reference 67 Name M DIGITALFILTER M DPower M DS BUF fer M DS BUF fer M DS Clear M DS Count M DS Enable M DS Enable M DS GET M DS INTerval M DS INTerval M DS SAVEBUFER M DS SIZE M DS SIZE M DS UNITs M FILTer M M M MIN Power M MEAS TIMEOUT M MEAS TIMEOUT M MODE M P P P P PM SPOTSIZE PM STAT MAX PM STAT MEAN PM STAT MIN PM STAT MAXMIN PM STAT SDEViation P P P
108. reted this 1st string is 2nd string a 3rd string string 4th string Sent this isastring Interpreted this 1st string separator character isastring 2nd string Sent w cm Interpreted w st string ERROR unrecognized character cm 2nd string Definition of lt number gt The 1928 C recognizes four types as lt number gt thus any format may be used l lt number gt defined as floating point 2 lt number gt defined as binary 3 lt number gt defined as octal 4 lt number gt defined as hexadecimal Where necessary integers are converted to floating point numbers In all cases a number is terminated by any of the below characters lt NL gt lt EOI gt lt SPACE gt Any non valid characters detected in any number received are considered an error in format and an error condition will be generated in the system A description of each type of lt number gt follows 1 lt number gt defined as floating point Appendix A Any of the following characters as the first character of an ASCII sequence indicates that a number is being defined 0123456789 A floating point number is defined as follows 1 Optional sign This defines the sign of the number If missing positive is assumed 2 Optional 0 9 digits These digits define the integer portion of the mantissa 3 Optional decimal point This defines the end of the integer portion of the mantissa and indicates that th
109. returns two values that are comma delimited The first value is the power reading and the second value is the status The status should be used to validate the reading The reading is in units corresponding to the units field in the status word Response Type Description Power reading exp Power in present units Status int A bitfield in hexadecimal defining the current channel status NOTE The bitfield is defined as follows Bits 10 7 Channel Units See PM UNITS Bits 6 4 Channel Range See PM RANge Bit 3 Detector Present Bit 2 Channel range change status Indicates if a measurement has been taken while the unit is ranging Bit 1 Detector Saturated reserved follows bit 0 Bit 0 Channel overrange Indicates that the current measurement is overrange for the current channel range Related Commands PM MODE Example If the query returns the following values 1 862153E 004 118 then the Power reading is 1 862153E 004 and the Status is the hex value 118 or the binary value 00100011000b Taking into consideration the bitfield definition the status is decoded as follows Communication Command Reference 87 8 3 3 56 8 3 3 57 8 3 3 58 Bits Binary Decimal Function 10 7 0010 2 units Watts 6 4 001 1 range 1 3 1 1 detector present 2 0 0 instrument not ranging during measurement 1 reserved 0 0 0 measurement is not over range PM RANge Description Range select Syntax PM RANg
110. ront Panel keys 4 2 1 Setup Enter Key The Setup Enter key is placed to the right of the display Figure 17 This key has dual functionality From the main screen Figure 18 press this key to display the Measurement Settings screen Figure 19 Also use this key while any secondary menu is displayed to complete entering data or to exit the current secondary screen SS SS a Figure 17 Navigation Selection and Setup Enter keys System Operation 33 4 2 2 4 2 3 Mode CW Cont Range Auto 400 nm of Figure 18 Main screen Measurement Settings Wavelength 670 Detector 818P 001 12 Range 0 113 Sunj S N 173952 Range type Auto Det temp No Therm Attenuator Off Responsivity 1 959E 1 Analog filter Ref val 0 0010 Sun Digital filter Offset 0 0000 Sun Units Sun Num Digits 5 Mode CW Cont Spot size 1 1310 cm _Trigger_ Correction Figure 19 Measurement Settings screen Refer to Section 4 3 for more information about the measurement settings Esc Key The Esc key Figure 16 and Figure 17 is used to cancel the current action When in a secondary screen or menu it will close the current screen or menu and the instrument will return to the main screen Figure 18 Navigation and Selection Keys Navigation through and selection of data in the display is done with the top right group of four arrows keys and with the Setup Enter key Figure 17 34 System Operation
111. rporation Worldwide Headquarters 1791 Deere Avenue Irvine CA 92606 In U S 800 222 6440 Tel 949 863 3144 Fax 949 253 1680 Internet sales newport com Newport Visit Newport Online at www newport com
112. rror Occurs when an error in command structure or parameter type is detected Some typical causes are e Using a number as a command mnemonic e Using the wrong parameter type e Using ASCII characters outside of a string constant that are not defined by the command language syntax e Missing or too many parameters The above list in not exhaustive but does give the basic idea of what to look for 118 Appendix B 13 3 126 Too Many Or Few Arguments Generated when command arguments are missing or too many Execution Errors Execution Errors are associated with the interpretation of the converted commands and parameters received Incorrect parameter values and numerical range errors are types of execution errors Any execution error will cause the Execution Error bit bit 4 in the Standard Event Status Byte to be set 1 Out of memory This error is caused by an internal program fault and may be followed by an automatic instrument reset 201 Value Out Of Range This error will occur if a parameter is out of a valid range or not in the set of valid parameters for a given command 214 Exceeds Maximum Length Generated when the command exceeds the maximum command length Try shortening the command string 217 No saved information in recalled bin Generated when the user attempts to recall a bin which has no previous stored data 301 Query Error The Query Error occurs when the instrument is in the midst o
113. s This digitized signal moves through a number of process steps that may or may not alter the digitized value depending upon the operating state of the meter Each of these possible processing steps is discussed further Digital Filter If the digital filter annunciator Dig or Digital is on Section 4 2 5 the filter output is the average of the most recent 10 100 1000 10000 samples The number of samples is selectable by the user with the Filter menu Also the user can change the number of samples When less than the selected number of samples has been acquired since the last reset of the digital filter the output is the average of all the values received The digital filter is reset when the 1928 C Optical Power Meter is turned on and whenever the UNITS or the range changes or when the MODE of operation changes NOTE When using the digital filter in CW Single acquisition mode each measurement is the average of the last 10 100 1000 10000 acquisitions independent of how old any of the measurements are Gain Gain processing accounts for the signal gain of the input amplifiers The output is the product of the digitized value and the amplifier gain Principles of Operation 99 9 4 Zero Offset Zero offset is active whenever the Offset annunciator is lit The zero offset output is equal to the input value less the zero reference value Responsivity Map s This process scales the input value in accordance with current cali
114. s the units for readings Argument Value Description units 0 Amps 1 Volts 2 Watts 3 Watts cm 4 Joules 5 Joules em 6 dBm 7 10 Reserved 11 Sun Related Commands PM MODE Note The UNITs selection depends on the detector used Refer to Table 1 for the relationship between the detector type and units 94 Communication Command Reference 8 3 3 79 8 3 3 80 8 3 3 81 PM UNITs Description Units query Syntax PM UNITS Remarks The PM UNITS query returns an integer indicating the units selected Response Value Description units 0 Amps 1 Volts 2 Watts 3 Watts cm 4 Joules 5 Joules cm 6 dBm 7 10 Reserved 11 Sun Related Commands PM UNITS Note The UNITs selection depends on the detector used Refer to Table 1 for the relationship between the detector type and units PM ZEROSTOre Description Zero value set command Syntax PM ZEROSTO Remarks The PM ZEROSTO command sets the zeroing value with the present reading Argument Type Description none Related Commands PM ZEROVAL PM ZEROVALue Description Zero value set command Syntax PM ZEROVAL value Remarks The PM ZEROVAL command sets the zeroing value When enabled zeroing subtracts the stored zero value from readings before making measurement calculations Argument Type Description Value float Zeroing value Related Commands PM ZEROSTO Communication Command Reference 95 8 3 3 82 PM ZEROVALue Description Zero value query Syn
115. selection keys to control annunciator functions 3 3 Rear Panel Layout CAUTION DO NOT REMOVE COVER REFER SERVICING TO QUALIFIED PERSONNEL DISCONNECT POWER BEFORE REPLACING FUSE Figure 14 Rear panel System Overview 29 3 3 1 Rear Panel Elements The rear panel of the 1928 C features the following elements Figure 14 Main Power Switch The Main Power Switch is located on the rear panel It is part of the AC power input connector When the power is on the meter can go in Standby mode by pushing the Standby key on the front panel Input Connectors The input connectors are on the rear panel The 1928 C power meter supports input from external detectors through DB15 detector connectors Output Connectors The power meter 1928 C supports an analog output This is a 3 5 mm Jack Output and enables direct monitoring of a detector through an oscilloscope or voltmeter The monitoring channel is analog Because of that the signal is visualized in real time Mini USB Connector labeled PC This connector is used for sending remote commands to the Optical Power Meter from a PC The connection to a computer is done via a USB cable Type A Male Connector to Type Mini B Male Connector USB A connector labeled FLASH DRIVE This connector is used for saving the data on a USB flash drive and for firmware upgrades CAUTION There are no user serviceable parts inside the Optical Power Meter Work
116. sence of the attenuator in front of the photo diode For models such as 818 low power series detectors which have a removable attenuator there is no switch built into the detector head hence the user will have to manually select attenuator option status on the meter to obtain the proper power or signal readings Peak to Peak Power Measurements 918D Detectors This section describes the procedure for making basic optical peak to peak power measurements e With a918D Low Power Detector connected to the meter turn the meter on Set the Mode to Pk Pk Continuous Set Range to Auto and press the Lambda A key to set the measurement wavelength to the desired value e Illuminate the detector and note the displayed value This reading is the peak to peak optical power observed by the detector e Accurate peak to peak power measurements can be made for pulse repetition rates up to 20 kHz 56 Performing Basic Measurements 5 5 5 6 Power Ratio and Power Reference measurements This section describes how to use the mathematical functions in the Optical Power Meter to obtain a power or signal comparison to a previously saved value The readout can be displayed as a linear ratio a percentage or in dB Refer to Section 4 9 for information on setting the reference values e Example 1 In order to select dB ratio versus a stored reference value a While in the Math function screen select channel A by using the up or down arrow ke
117. t is considered to be a command a string or numerical argument The punctuation lt gt is used to symbolize the typographic limits of the command string or argument in question lt CR gt Carriage Return The ASCII encoded byte 13 in decimal OD hex lt LF gt Line Feed The ASCII encoded byte 10 in decimal 0A hex 64 Computer Interfacing 7 2 4 7 2 5 7 2 6 7 3 Semicolons Semicolons are used to separate commands within a single transmission concatenation lt number gt Numerical Types Numerical parameters are passed and returned as the actual ASCII characters in the string representation of the number See section 12 2 for more detailed information lt string gt String Types See the section 12 1 for a detailed description of lt string gt USB Communication The instrument is designed to communicate with standard USB interfaces Before connecting the instrument to the USB interface the user should install the application included in the software CD that accompanies the Optical Power Meter The application automatically installs the right USB drivers Communication can be done through this interface by using the application or by developing software in the user s preferred programming language The software CD contains drivers and example programs in the following programming languages LabVIEW Visual Basic and Visual C 8 1 8 2 Communication Command Reference 1928 C Optical
118. t reproducible measurements light should illuminate the detector as uniformly as possible over as large an area as practical CAUTION Avoid focusing a light source onto the detector surface Inaccurate readings and possible detector damage may result Consult the detector manual for saturation or damage thresholds NIST trace ability requires that detectors be recalibrated on one year intervals As individual detector responses change with time especially in the ultraviolet recalibration is necessary to assure confidence in the uncertainty of the measurement For the most reproducible measurements the same detector should always be used for measurements that are to be directly compared Quantum Detector Temperature Effects Semiconductor Newport Low Power detectors are affected by temperature At long wavelengths quantum detectors typically lose sensitivity with increasing temperature Additionally detector dark current increases exponentially with temperature Observed dark current is often dominated by the interaction between the detector and a meter s amplifier and is typically larger than the theoretical dark current limit Silicon detectors are inherently quieter than germanium detectors due to their higher internal resistance and Principles of Operation 105 9 10 3 9 10 4 9 10 5 lower capacitance The noise or drift in the dark current sets a lower bound on the measurement resolution that can be achieved wi
119. tax PM ZEROVAL Remarks The PM ZEROVAL query returns the zero value Response Type Description value float Zero exponent Related Commands PM ZEROVAL 96 Communication Command Reference This page is intentionally left blank 9 1 9 2 Principles of Operation Introduction The 1928 C Optical Power Meter electronics adapt to a number of signal measurement tasks DC current or voltage AC peak to peak current or pulse voltage or integrated DC current or voltage signals This versatility is required to handle the various signals that Newport s Low Power High Power Energy and other detector families generate These detector families are based on semiconductor thermopile and pyroelectric The detector data is introduced to the 1928 C by way of a calibration module specific to the detector in use At power up and RESET the 1928 C downloads information about the detector from the calibration module or the detector internal memory Based on the calibration module preprogrammed data the meter learns the set of operating states available to the detector The user then selects among the available operating states when using the meter Front panel control and the operating states of the 1928 C Optical Power Meter are discussed in Section 3 Analog Signal Flow The detector signals can follow many different paths through the 1928 C input amplifier chain A block diagram of analog signal flow is shown in Figure 57 The actual flo
120. th any given detector Cooling a detector significantly lowers its dark current and dark current noise The observed dark currents can also be zeroed at any moment via the ZERO function Since dark currents drift with temperature the ZERO should be adjusted just prior to taking any measurements If the detector temperature is constant sensitivity changes and dark current drifts are significantly reduced The 1928 C Optical Power Meter can measure the detector temperature and correct the power readings accordingly The power correction happens automatically only for those detectors which are equipped with a thermistor Newport offers detectors with thermistors for temperature compensation See Newport web site www newport com for more details The thermistor signal is read via the detector DB 15 connector and the displayed power is adjusted continuously depending on the detector temperature The analog output signal shows the detector signal and is not corrected for temperature Thermopile Detector Temperature Effects Thermopile Newport High Power detectors are significantly affected by temperature fluctuations arising from airflow disturbances As the detector is a temperature measuring device airflow disturbances set a practical lower limit on the power that a detector can measure In order to get the most out of any thermopile detector be careful to shield the detector from airflow disturbances Common sources of disturbance are ai
121. the highest precision and accuracy the 1928 C Optical Power Meter should be allowed to warm up for one hour before being used for measurements 3 2 Front Panel Layout GO Newport Power Meter Model 1928 C Bi 5 3466 as 29255 Figure 13 Front Panel Layout 28 System Overview 3 2 1 Front Panel Elements The front panel of the 1928 C features the following elements e A faceplate with a 4 active color liquid crystal display e Setup Enter and Esc keys e Rubberized horizontal left right and vertical up down arrow keys Four rubberized blank keys below the display referred to as soft keys later in the manual as their function depends on the text on the screen above the key The leftmost key is also the Standby key e Six rubberized buttons with dedicated functions Range Mode Hold Filter Lambda A and Zero 3 2 2 Understanding the Main Screen The main screen is displayed after startup Figure 13 The middle portion of the main screen is a real time display of power measured in last used units and the lower half of the main screen is a row of four labels for actions that the keys below them will activate When an annunciator label is visible its function is enabled If the annunciator appears on the display as an unlabeled key the function it represents is currently disabled Annunciators loosely correspond to keypad keys which are used either alone or in combination with the navigation and
122. this instrument To utilize this new functionality will require an update to the instrument s firmware which can be easily accomplished by the user as described in this User Manual As required Newport will also generate a new version of this User Manual reflecting updates to the instrument Please check the Newport website www Newport com for newer versions of the firmware and the User Manual which can be downloaded as a PDF file Call your local Newport application specialist if you need support with locating or downloading these files Enjoy your new instrument Preface 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 first occurs Limitation of Warranty The above warranties do
123. tscccscssans 15 4 Microsoft Visual Csr ote seacdy sideae astonnvdsesceeteapusacecsoiaaanteate 153 Micros tt NE Three ecco ce santana aaa 16 Appendix E Disassembly Instructions 16 1 Disassembly instructions ccccccceeseceeeceeeeeeteeeeeeeteeeeees xiii Preface List of Figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29 Figure 30 Figure 31 Figure 32 Figure 33 Figure 34 Figure 35 Figure 36 Figure 37 Figure 38 Figure 39 Figure 40 Figure 41 Figure 42 Figure 43 General Warning or Caution Symbol cecceeceeseeeseeeteceteeeees 15 Electrical SHOCK Symbol ssc cteschseveccussaes cadeneleceushotoeniiateaaiiaadss 15 Protective Conductor Terminal Symbol ccececeesseeeteeeeeeeees 15 CTE NAAT Me ot a Ao deen gies ce hy ces ayes a TE a sentation 16 Alternating Voltage S viol sh sens su aesnsesd ecdunteites pavasreseiey aisueusaeses 16 OMS VIMO piv wias co riana a a a a KE a a Aiai 16 COPE SY MD reinan R EE ARAE EA 16 Fuse Symboli 4c sce anor snenia ana E a a aces a 17 Frame or Chassis Terminal Symbol sssssssessessessseeseeseesseesseseessee 17 USB connector Symbol ss ssssessseesesseesseesseserssesseserssressessrssressesse
124. unction Returns This query returns the difference between the maximum and minimum readings in the statistics buffer lt mxmn gt lt mxmn gt is of type lt number gt in exponent notation PM STAT SDEViation Description Syntax Parameters Function Returns PM Temp Description Syntax Remarks Response temp Statistics Standard Deviation Query PM STAT SDEViation None This query returns the standard deviation of the readings in the statistics buffer lt stddev gt lt stddev gt is of type lt number gt in exponent notation 918 detectors temperature query PM Temp The PM Temp query returns the 918 detector s temperature as a float in degrees Celsius Type Description float Detector temperature in degrees Celsius C Related Commands PM ATT PM TRIG START Description Syntax Parameters This command sets the optional start event PM TRIG START option The parameter lt option gt is of type lt number gt and is an integer from 0 to 3 Argument option Value Description 0 Continuous measurement 1 Reserved 2 Measurement starts when a designated Soft key is pressed 3 Measurement starts when PM TRIG STATE 1 command is issued 92 Communication Command Reference 8 3 3 73 8 3 3 74 8 3 3 75 8 3 3 76 Related Commands PM TRIG START PM TRIG START Description Trigger START Query Syntax PM TRIG START Parameters None Function This query retur
125. ve and then plug it into the USB connector on the rear panel of the instrument Then wait a few seconds for the instrument to recognize the USB Flash Drive The Optical Power Meter will detect the new firmware files and will ask if you want to download the files Press the Yes softkey to start the upgrade process The Optical Power Meter will instruct you to restart once the upgrade is successful Disconnect the flash drive from the instrument and restart it by turning it OFF and back ON The instrument will restart running the new firmware New firmware files may be available either through the Newport web site http www newport com at the product page or through your local Newport application specialist 5 1 5 2 Performing Basic Measurements Introduction Many different types of optical measurements are possible using the 1928 C Optical Power Meter Most of these possible measurements are selected from within the MODE menu This chapter discusses these measurements Measurement Modes and Units The 1928 C provides a number of measurement modes for acquiring data At power on the meter checks the detector s calibration EEPROM to determine the available measurement modes supported by the detector Measurements can be displayed in various units The detector type and the measurement mode determine the set of units available at any given time Table 1 illustrates the measurement modes and units available for each detector fam
126. w path depends upon the detector type and the mode of measurement vg SN a Output Input ee N gt e a ed a i 5 Hz Programmable Voltage Noise Filter Voltage Buffer O x id Programmable lt lt TN Amplifier Programmable Transimpedance m p Amplifier Peak Detector so d ADC Baseline Detector Figure 57 1928 C Optical Power Meter Analog Signal Flow Diagram 98 Principles of Operation 9 3 The analog signal flow path is primarily determined by the responsivity units of the detector The numerator of these units indicates how the meter must be configured in order to obtain a calibrated optical measurement Analog signal flow is independent of whether single or continuous measurements are made Responsivity units and signal flows for the various detector families are listed in Table 4 Detector Family Resp Units Mode Amplifier Peak Path Baseline Low Power A W DC No Low Power A W Peak Peak No Low Power A W Integral No High Power VIW DC V No High Power VIW Integral V No Energy VIJ Pulse V Yes Table4 Analog Signal Flow Paths Digitized Signal Flow An analog to digital converter captures the input signal The input signal has the units of current or voltage depending upon how the input amplifier chain was configured Note In this manual the digitized signal may be referred as sampled signal or sample
127. walls for ventilation purposes Approximately 2 inch spacing for all surfaces is adequate Electrical Requirements Before attempting to power up the unit for the first time the following precautions must be followed WARNING To avoid electric shock connect the instrument to properly earth grounded 3 prong receptacles only Failure to observe this precaution can result in severe injury 26 General Information 2 10 e Have a qualified electrician verify the wall socket that will be used is properly polarized and properly grounded Verify the correct rated fuses are installed according to the fuse marking on the rear panel Power Supply AC power is supplied through the rear panel input power connector that provides in line transient protection and RF filtering The input power connector contains the fuses for operation at 100VAC 120VAC 220VAC or 240VAC CAUTION Do not operate with a line voltage that is not within 90 264 VAC 3 System Overview 3 1 Startup Procedure WARNING To avoid electric shock connect the instrument to properly earth grounded 3 prong receptacles only Failure to observe this precaution can result in severe injury Provided that the Optical Power Meter has been installed in an appropriate environment and its external power supply power cord is connected to a working electrical outlet power up the Optical Power Meter by pressing the power button on the back panel For
128. y label with a genuine copy of the SOFTWARE identifies a licensed copy of the SOFTWARE To be valid the label must be affixed to the DEVICE or appear on Newport s software packaging If you receive the label separately other than from Newport it is invalid You should keep the label on the DEVICE or packaging to prove that you are licensed to use the SOFTWARE Product Support Product support for the SOFTWARE is not provided by MS Microsoft Corporation or their affiliates or subsidiaries For product support please refer to the Newport support number provided in the documentation for the DEVICE Should you have any questions concerning this EULA or if you desire to contact Newport for any other reason please refer to the address provided in the documentation for the DEVICE Termination Without prejudice to any other rights Newport may terminate this EULA if you fail to comply with the terms and conditions of this EULA In such event you must destroy all copies of the SOFTWARE and all of its component parts Export Restrictions You acknowledge that SOFTWARE is subject to U S and European Union export jurisdiction You agree to comply with all applicable international and national laws that apply to the SOFTWARE including the U S Export Administration Regulations as well as end user end use and destination restrictions issued by U S and other governments For additional information see http www microsoft com exporting Newport Co
129. ys There will remain a black border around the highlighted selected channel as you leave the column for the next selection Move to the next column by using the right arrow key and select dB option Move to the last column by using the right arrow key and use the up or down keys to select Ref A Press the Menu Enter key to accept the selections and exit the Math function screen The result of Ch A Ref A in units of dB will appear in the designated window on the screen Example 2 In order to get the difference between channel A and a stored reference value a From the main screen of the meter select soft key labeled Math to enter the math function screen If you cannot see the label Math press the ESC key Use the direction keys to highlight channel A in the first column Using the direction keys navigate to the column symbol in the center Using the direction key move the final column such that Ref A is highlighted Press the Menu Enter key to retain the settings and exit the screen at the same time The result of Ch A Ref A will be displayed in the designated window of the main display screen Pulse Energy Measurements 818E Detectors This section describes the procedure for making basic optical pulse energy measurements e With an 818E Energy Detector connected to the meter turn the meter on Set the Mode to Pulse Continuous Set the Range to Manual Mode and

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