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Math Functions

1919-R User Manual

9.7

Density

You can display power/energy as measured by the sent as W/ cm² based on user-defined laser
spot shape and size.

Note:

The

Density

option is grayed out in any of the following conditions: if the present range is

dBm, if

Normalize

has been set, or if Exposure is the current mode.

To display as power/energy density:

Press

Menu

and enter

Functions

Go to

Density

. Press the

Enter

key.

Select the beam shape (

Disabled

Rectangle

Circle

). Selecting

Rectangle

enables the

Height

and

Width

parameters for modifying the spot height. Selecting

Circle

enables the

Diameter

parameter for modifying the spot diameter.

Figure

‎

9-8 Modifying Density – Circular Beam and Spot Diameter

After the shape (

Rectangle

Circle

), select the size (

Height

and

Width, or Diameter

). Size

parameters can range from 0.1mm to 100.0mm.

The measurements will be shown as cm² on the graphical display on the main measurement
screen.

Figure

‎

9-9 Measurement of Power Density in nW/cm

Содержание 1919-R

Страница 1: ...www newport com Newport Corporation Laser Power Energy Meter User Manual 1919 R 1919 R 1919 R...

Страница 2: ...rement Parameters 10 2 4 4 Measuring Energy Average Power or Exposure 11 2 5 Graphical Displays 11 2 6 Math Functions 13 2 7 Logging Data to a File for Upload to PC 13 3 Using the 1919 R Display Unit...

Страница 3: ...Energy Sensors 42 7 1 Pyroelectric Sensors Method of Operation 42 7 2 Photodiode Energy Sensors Method of Operation 42 7 3 Measuring Pulses of High Energy Density 43 7 4 Operation of 1919 R with Pyro...

Страница 4: ...1 Launching the Log Setup 77 10 2 Setting Logging Parameters for the Various Stop Modes 78 10 2 1 Manual Mode 79 10 2 2 After Timeout 80 10 2 3 After Measurements 82 10 3 Start Logging 83 10 4 Display...

Страница 5: ...ensors 100 12 4 2 Calibration 101 12 4 3 Accuracy of Calibration 101 12 4 4 Updating Pyroelectric Sensor Calibration Factors 102 12 5 Error Messages 104 12 6 Troubleshooting 104 12 6 1 1919 R Meter 10...

Страница 6: ...n is stored in the smart connector you can recalibrate from the screen and store the new calibration in the sensor You can also zero the 1919 R at the touch of a button 1919 R is capable of logging da...

Страница 7: ...rvice Dept 1791 Deere Ave Irvine CA 92606 Telephone 949 253 1694 Telephone 800 222 6440 x31694 Newport MICRO CONTROLE S A Zone Industrielle 45340 Beaune la Rolande FRANCE Telephone 33 02 38 40 51 56 N...

Страница 8: ...performed by briefly pressing the On Off switch after the 1919 R has been switched on 3 To switch the 1919 R off press the On Off switch and hold it for 2 seconds until the display blanks To set gener...

Страница 9: ...verage to the period you wish to average power over or set to NONE to disable 2 2 3 Using 1919 R to Measure Single Shot Energy 1 Set Mode to Energy 2 Set Range to the appropriate manual range In Energ...

Страница 10: ...Power or Exposure To measure average power 1 Set Mode to Power 2 Set measurement parameters as described above To measure exposure 1 Set Mode to Exposure 2 Set measurement parameters as described abo...

Страница 11: ...If this sensor is a metallic type and if the wavelength you want is not among the wavelengths listed select one and press the arrow key that is next to it to open the Modify screen Using the up down k...

Страница 12: ...requency To measure exposure 1 Set Mode to Exposure 2 Set measurement parameters as described above 3 Set Stop Mode to Manual Timeout period or Pulse count 4 Accumulated energy exposure will be displa...

Страница 13: ...the main display screen 3 Displays Maximum Minimum Average Standard Deviation Total Readings and Number Overrange 4 To subtract the background and set the current reading to zero press the Offset butt...

Страница 14: ...working with beam splitters To normalize against a reference measurement 1 Press Menu and enter Functions Go to Normalize 2 Set to reference value by which to normalize all subsequent measurements To...

Страница 15: ...rement readouts in ways that simple monochrome displays cannot The 1919 R can graph power or energy versus time It displays power measurements in both digital and analog form simultaneously and also h...

Страница 16: ...d with LCD Display screen Soft keys under the display screen The functions of the keys change as indicated by the legend above each key The Menu key enables you to access Sensor Display Functions Inst...

Страница 17: ...ion describes the 1919 R hardware components and interfaces Topics include Sensor Input LCD Display and Backlight Soft Keys Navigation Keys On Off Switch Backlight Control Charger Input Analog Output...

Страница 18: ...ple if Zoom appears above a key pressing that key will display a zoom view of the screen Some functions operate when the key is pressed and are canceled when the key is pressed again Those keys show r...

Страница 19: ...Press the On Off switch and hold it for 3 seconds until the display blanks To toggle the state of the backlight of the 1919 R s LCD Briefly press the On Off switch after the 1919 R has been switched...

Страница 20: ...gments turn on in sequence When the battery is low the charger should be plugged in While the unit will charge even while on and even with the backlight on it will charge fastest if the charger is lef...

Страница 21: ...d Rate can be configured in the Instrument Settings screen accessed by pressing the Menu button and selecting Instrument 2 Use the Navigation keys to select RS232 Baud Rate and press the Enter key to...

Страница 22: ...Navigation keys to select the parameter to change and press the Enter key to display the options as described in Table 3 2 below These instrument settings are also available when a sensor is connected...

Страница 23: ...desired instrument startup language Options include English Japanese Russian Chinese Line Frequency Set local line frequency to screen out electrical noise from the mains supply to prevent any impact...

Страница 24: ...dheld Power and Energy Meters 6770602 1033 category aspx and copy it to your target directory 2 Run the upgrade executable and follow the on screen instructions Figure 3 9 1919 R Field Upgrade Wizard...

Страница 25: ...s Exit to return to the main screen For Thermopile Sensors only For best results with Thermopile sensors it may be necessary to do the procedure once with the sensor disconnected then afterwards again...

Страница 26: ...the main screen use the Down Navigation key to select Language and press the Enter key 2 Set to English Japanese Russian or Chinese 3 Press the Enter key to save the new setting Note If you mistakenl...

Страница 27: ...y to remove it from the measurement Figure 3 11 Bargraph Needle Simulates an analog display similar to the style of an analog voltmeter or a car s speedometer Available when measuring power or energy...

Страница 28: ...s gives the total energy exposure over that time period For example if the laser is pulsing at 30 times sec at 1mJ per pulse and you measure the exposure over 20 seconds then the total exposure is 30...

Страница 29: ...setting For both of these full color schemes warnings will be displayed in red selection windows for example range average laser will be pink and modification windows will be white Figure 3 21 Sample...

Страница 30: ...3 22 1919 R Measurement Screen Layout The 1919 R measurement screen comprises Configuration parameters for laser measurements at the top including Mode on upper left for setting the measurement mode f...

Страница 31: ...t other instrument settings do you need to configure Do you use the analog output and if so is it configured correctly for your needs How would you like to display the measurement data as a bargraph a...

Страница 32: ...an the thermal rise time of the detector disc thus reducing the response time of the 1919 R Energy of a single pulse is measured on the 1919 R by digitally integrating the pulse power over time Most T...

Страница 33: ...aph Needle Line Statistics or Pass Fail graphical formats by pressing Menu Display and choosing the Graph Type Updating measurement parameters is performed in the main measurement screen A sample is s...

Страница 34: ...as a result of the pulse Energy measurements can be displayed in Bargraph Needle Line Statistics or Pass Fail graphical formats by pressing Menu Display and choosing the Graph Type Updating measuremen...

Страница 35: ...Needle display showing laser energy measurement data with options for Zoom Offset and Persistence Click the above links for more details Figure 5 3 Thermopile Energy in Needle Display Note The soft k...

Страница 36: ...um pulse energy of the laser 3 Set Laser to the appropriate laser setting 4 Set Pulse Length to the correct pulse length Using the up down Navigation keys to change each number and the right left keys...

Страница 37: ...sed Power Limitations Screen Limitations The measurement mode cannot be Pulsed Power when in the Calibration screens Calibration screens will force the user to select between Power and Energy Function...

Страница 38: ...ies low cost fiber optic detectors do not Some of the 819C D series integrating sphere detectors utilize the 918D series detector which has an integrated filter Refer to their user manuals and website...

Страница 39: ...erent wavelengths Moreover the filters used in the sensor have a different transmission at different wavelengths In order to compensate each sensor has a built in calibration curve with 1nm resolution...

Страница 40: ...want When finished press the Enter key Figure 6 1 Modifying the Laser Setting Photodiode Sensor 4 Set the removable Filter setting to IN to measure higher power or to OUT for more accuracy and a wide...

Страница 41: ...luctuation Nevertheless you can measure these low values by using the average function and pressing offset to eliminate the detector zero offset To measure very low powers 1 Press Menu and select Func...

Страница 42: ...another reading press Reset 6 To return to the main power measurement screen set Mode to Power Figure 6 3 Photodiode Exposure Measurement 6 4 1 Exposure Limitations Screen Limitations The measurement...

Страница 43: ...is produced which is proportional to the energy absorbed The detector sensor has sophisticated circuitry unique to Newport patented that determines the baseline before the pulse is received measures...

Страница 44: ...gy in the Bargraph screen in the 200uJ range with a 1064 laser with no averaging this will be the setup used the next time the system is powered up These settings can all be easily changed as describe...

Страница 45: ...of 2 or so can occur To zero the instrument against the energy sensor 1 Make sure the sensor is in a quiet environment and not subject to pulsed radiation 2 Press Menu and select Instrument 3 Press Z...

Страница 46: ...l pulse lengths In that case N A appears Warning Incorrect readings will result if pulse length is not set up correctly 4 Set Diffuser to IN or OUT as physically set on the sensor relevant for sensors...

Страница 47: ...r However the display can only display at rates up to 10Hz Note High sensitivity Pyroelectric sensors 919E 200U 8 25K 919E 0 1 12 25K are very sensitive to vibration and therefore might read a false t...

Страница 48: ...e as when measuring energy and has been described in full in section Operation of 1919 R with Pyroelectric and Photodiode Energy Sensors To measure average power 1 Set Mode to Power 2 Set measurement...

Страница 49: ...imeout period or Pulse count Accumulated laser energy exposure will be displayed on the screen as well as elapsed time and number of pulses measured 4 To stop exposure measurement before the chosen pe...

Страница 50: ...lized to some value or a screen with limits You can choose to show or hide measurement parameters and you can customize the color scheme and bargraph style This section describes the graphical display...

Страница 51: ...e Graphs laser output as a function of time Statistics Large numeric display with statistics Pass Fail Tests for measurements outside the user defined range of acceptable readings Exposure Sum of the...

Страница 52: ...the middle of the screen Bargraph displayed close to the bottom Soft key legends at the bottom of the screen To present measurements on a graduated scale bargraph 1 In Power or Energy mode press Menu...

Страница 53: ...ss the Zoom key again to return to the unexpanded Bargraph display 8 2 3 Offset The Offset function can be used to subtract the background and set the current reading to zero For Thermopile and Photod...

Страница 54: ...the background press Offset twice The first press will cancel the old value and the second will activate a new value If you suspect that 1919 R has a permanent zero offset the instrument s internal ze...

Страница 55: ...Color 2 When the bargraph style is set to Changing then the color of the bargraph and the digital readout changes as a function of percentage of full scale For example if the reading is less than 30 o...

Страница 56: ...ure 8 9 Figure 8 10 Figure 8 11 and Figure 8 12 below show sample colored bargraph power readings indicating Green less than 30 full scale White 30 to 60 full scale Yellow 60 to 90 full scale Red grea...

Страница 57: ...what the full range of measurements actually is including the maximum and minimum readings of the present set of measurements Figure 8 15 Pyroelectric Energy Needle Display The Needle graph display c...

Страница 58: ...el For further details see Offset 5 Press Persist to keep older measurements on the screen and to display numerically the Min and Max values measured Press Persist again to cancel 8 3 1 Modes The Mode...

Страница 59: ...of the screen Max and Min values on upper right above the Line graph Large numeric display above the Line graph Line graph displayed prominently in the middle of the screen The cursor at the tip of th...

Страница 60: ...up the graph s height The scale of the graph will be 90 110 or 50 150 of the initial reading If the reading goes out of that range then the graph will be rescaled around the present reading 100 Graph...

Страница 61: ...isplay Measurement statistics are also displayed Statistics displays are available when measuring power or energy Figure 8 21 Photodiode Power Statistics The Statistics display comprises the following...

Страница 62: ...h is useful for final inspection testing other aspects of Production Q A or field inspection of equipment If the measurement is out of range OVER or UNDER will be displayed on the screen If the Color...

Страница 63: ...f the present range and the initial default Lower Limit is 0 until the first time both values are set to something else To set the Upper and Lower Limits 1 Press the Upper or Lower key The respective...

Страница 64: ...Sensors and Measuring Total Energy Exposure See also Manual Timeout Pulses Figure 8 26 Pyroelectric Exposure Measurements The Exposure display comprises the following components Parameter settings th...

Страница 65: ...elect 1 second 3 seconds 10 seconds 30 seconds 1 minute 3 minutes 10 minutes 30 minutes or 1 hour Will also stop by the user pressing the Stop key Figure 8 28 Timeout Options Pulses Stops after the sp...

Страница 66: ...sensor that measures power or energy Figure 8 30 Photodiode Pulse Chart The Pulse Chart display comprises the following components Parameter settings the sensor s name and serial number and battery s...

Страница 67: ...centage range of the Y scale to be displayed to the desired setting For more details see Percentage Range Y Axis Scale 4 Set the number of pulses as required 5 Press Reset to clear the Min Max trackin...

Страница 68: ...gs and press the Enter key 4 Select Yes to show the settings or select No to hide them Figure 8 32 Show Sensor Settings Figure 8 33 Hide Sensor Settings 5 Press the Enter key to save the settings 8 9...

Страница 69: ...sor 2 Press the Menu button and use the Navigation keys to select Display and press the Enter key 3 Use the Navigation keys to select Color Scheme and press the Enter key 4 Select the relevant full co...

Страница 70: ...features of the 1919 R will not be functional in any of the monochrome screens Follow the procedure above to set the color scheme and choose one of the following monochrome schemes Black White Black...

Страница 71: ...Arrow icons will appear at the top of the display to inform that there is more to be seen A Right Arrow on the upper right indicates additional functions are available Pressing the Navigation key dis...

Страница 72: ...ys the power energy measurement with applying all of the functions that have been enabled Middle third displays all of the functions and their present status Bottom of screen displays context sensitiv...

Страница 73: ...er energy readings Note The Offset value can be set to positive or negative To apply a fixed offset to measurements 1 Press Menu and enter Functions 2 Go to Fixed Offset 3 Set the value to subtract fr...

Страница 74: ...le Factor to 20 to get the actual output of the laser To apply a Scale Factor to measurements 1 Press Menu and enter Functions 2 Go to Scale Factor 3 Set to value by which to multiply all subsequent m...

Страница 75: ...and enter Functions 2 Go to Normalize 3 Set to reference value by which to normalize all subsequent measurements The reference value can only be positive 4 Press Apply to set the present value as the...

Страница 76: ...Go to Density Press the Enter key 3 Select the beam shape Disabled Rectangle Circle Selecting Rectangle enables the Height and Width parameters for modifying the spot height Selecting Circle enables...

Страница 77: ...sors in Single Shot Energy mode Average is disabled For sensors in Exposure mode Average Normalize and Density are disabled If Normalize is active then Density is disabled If Density is active then No...

Страница 78: ...up To activate the Log function you need to first connect an external storage device to the 1919 R meter Once connected the Log Setup screen is displayed where you can configure the logging parameters...

Страница 79: ...ttom of the screen Start Start logging based on selected sensor and log parameters Files Enter the Log Files screen Exit Exit to the main menu screen 10 2 Setting Logging Parameters for the Various St...

Страница 80: ...continues until the user presses the Stop key To set the Stop Mode to Manual 1 In the Log Setup screen set the Stop Mode to Manual The Log Setup screen displays the following parameters Figure 10 4 M...

Страница 81: ...Options Options include Sample Logs only the last reading that was measured Average Stores the average of all of readings that have been measured since the previous data has been added to the log 10 2...

Страница 82: ...before a new measurement is added to the log file The default interval is 0000 00 00 i e log each reading Figure 10 8 Setting the Interval Store By Determines the quality of the data that is stored Se...

Страница 83: ...etup screen displays the following parameters Figure 10 9 After Measurement Stop Mode 2 Go to each parameter and set the relevant options as required Log Size Number of readings that you want to store...

Страница 84: ...displays the graph type that was previously selected in the Display menu and the following additional parameters at the top of the screen Elapsed Time that has elapsed since starting the present log...

Страница 85: ...active and will be as it was when the log completed Figure 10 13 Active Logging Screen 5 When Start is pressed the logging counters will be reset the display will be cleared and activated The Stop and...

Страница 86: ...n At the bottom of the screen will be displayed general information of the currently highlighted file This includes the date and time of the log file hh mm ss duration number of logged readings number...

Страница 87: ...down keys to scroll up down one page Use the right left keys to jump to the first last page 5 Press Exit to exit the Log Setup screen How the Various Types of Average Affect Logged Data Average that i...

Страница 88: ...eview at your workstation To view the log file on your computer 1 Remove the Disk on Key from 1919 R and attach it to your PC 2 Start the PMManager application and select the Logging Menu 3 Select Ope...

Страница 89: ...above basic analog circuit the 1919 R contains a second fast analog input This supports certain Newport sensors that read energy pulses at higher rates than can be supported by the basic analog circu...

Страница 90: ...protected by EMI protection component on all signals that pass in and out of the box In addition EMI protection is added internally to prevent disturbances to the normal functioning of the instrument...

Страница 91: ...le Power Thermopile Energy Thermopile Response Time Note All calibration factors are dependent on the currently active set of configuration parameters In addition to NIST traceable factory calibration...

Страница 92: ...reading on the right The Updated box is highlighted indicating it is modifiable 5 In the Updated area use the Right Left arrows to select the digit to update Use the Up Down arrows to change the valu...

Страница 93: ...the calibration wavelength with little error 12 2 3 Linearity and Accuracy of Newport Thermopile Sensors Linearity The linearity of most Newport Thermopile detectors is specified to be 1 over the spe...

Страница 94: ...te calibration based on the selected factor The main Measurement screen appears displaying the relevant Factor values on the left based on the selected calibration factor For more details see Sensitiv...

Страница 95: ...2 9 Updated Energy Calibration Factor in Main Screen Response Available for all Thermopile sensors Optimize Thermopile response time of the sensor Use to attain accurate readings as quickly as possibl...

Страница 96: ...here is any The following procedure guides you through the specific steps To set calibration per Response factor 1 In the Select Calibration Factor screen select Response and press Continue The main M...

Страница 97: ...er the scaling is completed the screen displays Block laser until power is close to 0 Figure 12 12 Scaling Completed 3 Press Next Figure 12 13 Response Calibration Factor 4 Adjust the Response Factor...

Страница 98: ...Factor values Figure 12 16 Scaled Present and Response Factor Values Updated Then the screen displays the final Response Factor value Figure 12 17 Final Response Calibration Factor Value The graph as...

Страница 99: ...correction factor for that wavelength is applied 12 3 2 Accuracy of Calibration Since the instruments are calibrated against NIST standards the accuracy is generally 2 at the wavelength the calibrati...

Страница 100: ...r for one setting has no effect on power readings in the other settings To update Photodiode sensor calibration factors 1 Press Menu and select Calibration The screen displays the following general me...

Страница 101: ...Factor for Photodiode Sensors 7 Press Exit to return to the Menu screen 12 4 Calibration of Pyroelectric Sensors 12 4 1 Absorber Types Used in Newport Pyroelectric Measuring Sensors The main absorber...

Страница 102: ...R the correction factor for that wavelength is applied Photodiode Energy sensors are calibrated in a two step fashion First the Photodiode detector filter combination are calibrated against a NIST tra...

Страница 103: ...tual calibration screen and the Navigation Panel is disabled The BB series of sensors have wavelength specific factors and therefore this screen allows the user to use the Navigation Keys to select wh...

Страница 104: ...left side of the screen and Updated factor and its effect on the reading on the right The Updated box is highlighted indicating it is modifiable Figure 12 27 Modifying Calibration for Pyroelectric Sen...

Страница 105: ...aximum the message sat saturated is displayed 12 6 Troubleshooting 12 6 1 1919 R Meter Table 12 2 1919 R Meter Problem Cause Remedy Instrument will not operate after being completely discharged and co...

Страница 106: ...power measurement If sensor is very hot allow it to cool Disconnect the sensor from the instrument If readout unit does not zero follow instructions in Zero Adjustments If the offset persists try zero...

Страница 107: ...a laser or an electrical power supply and the calibration resistor 2 Estimate the approximate signal current that should be developed by the sensor by multiplying the input power by the sensor sensiti...

Страница 108: ...sors Input Range 0 6V full scale A to D Sampling rate 5000 Hz A to D resolution 12 bits no sign 0 025 resolution Electrical accuracy 0 25 new 0 5 after 1 year Electrical input noise 2mV General Specif...

Страница 109: ...pile Photodiode 17 Pyroelectric 15 With high backlight Thermopile Photodiode 15 Pyroelectric 13 Note Battery charge will be depleted faster if a USB Flash Drive is left plugged in the 1919 R meter Dat...

Страница 110: ...819C IG 2 CAL 1 5W Int Sph PD 819C IG 5 3 CAL 4 5W Int Sph PD 819D UV 2 CAL 0 1W Int Sph PD 819D UV 5 3 CAL 0 5W Int Sph PD 819D SL 2 CAL2 2W Int Sph PD 819D SL 5 3 CAL2 10W Int Sph PD 819D IG 2 CAL 2...

Страница 111: ...0W cm PE DIF ER PD Photodiode Int Sph Integrating Sphere PF Volume absorber for short pulses and high average powers PE Pyroelectric metallic or black absorber BB Broadband surface absorber high power...

Страница 112: ...Figure 13 1 Pulsed Laser Damage Threshold for Thermopile Sensors Figure 13 2 Pulsed Laser Damage Threshold for Pyroelectric Sensors 1919 R User Manual 14 February 2019 Rev 1 28 2 For the latest versi...

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