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1. gt Y Enter Figure 15 Button Bar Soft Button Edit Functions The Left and Right arrow buttons step the edit cursor between edit able fields skipping disabled fields The Up and Down arrow buttons change the editable field at the cursor Digits of numerical values including the exponent of scientific notation values can be edited Each digit is considered a field Decimal points polarity i e or units display tags and the exponent marker i e E are not editable The minus sign in the exponent and base is indirectly edit able by editing the value to below 0 The currently addressed field indicated by the cursor position is identified by applying reverse video to the field Editable fields from a list of selections are edited as a unit For example for an On Off field only On or Off is displayed when using the Up and Down arrow buttons to scroll through the selec tions Editing numerical digits has rollover implications for the next most significant digit Keep the following in mind Pressing the Up arrow button increments the digit by one Pressing the Down arrow button decrements the digit by one 31 3sigma User Manual If the incremented digit rolls over from 9 to 0 the next most significant digit is also incremented by one When the next most significant digit rolls over from 9 to 0 the same rollover rules cascade to the next most significant digit and so forth s If the expec
2. Figure 26 Trend Display Example Pressing the Clear button clears the chart and history buffer resets the trace to the beginning and resets the minimum and maximum values displayed in the annunciator bar Data collection continues As with the Tune display screen pressing the Zoom button advances to the next zoom selection with the chart appropriately scaled see Zoom Selections on page 42 for more information Otherwise the button bar remains the same Pressing the Setup button enters the trend history size data entry screen described next under Trend History Size Pressing the Tune button accesses the tune display screen You may configure the size of the trend history buffer whenever the Trend chart is displayed in Tune mode Which trend history data entry screen appears depends on the type of sensor being used Pyroelectric sensors readings are expressed in pulses with a range of 264 to 99 999 pulses Thermopile and optical sensors are expressed in time with a range of 1 min to 99 hrs and 59 mins 41 3sigma User Manual Zoom Selections Tune mode charts normally display with data scaled at the current measurement range With the range set at its optimum point for a given laser input the chart curve should use most of the vertical range of the chart display At a less than optimum range setting you may zoom in to the signal by pressing the Zoom button which is at the far left position of al
3. Power up display page 31 Data entry page 31 Instrument modes page 33 Display data consists of either data entry information or measure ment display information Whenever the instrument cannot display meaningful data the data is labeled invalid stale or not available These three conditions are discussed in the following paragraphs Display information is considered invalid if it is not valid under the current conditions Generally invalid display information appears on a data entry screen because a selection made in one of the entry screen fields makes another field invalid for the current conditions For example the backlight data entry screen has two data entry fields the timer timeout value and the on off timer status If the timer status is off the timeout value is not applicable because the timer is disabled Invalid data displays using a dimmed font Measurement data is considered stale when a pyroelectric sensor is attached and a trigger cannot be detected Stale measurement displays using a dimmed font Whenever stale data is encountered the last non stale data will continue to display 21 3sigma User Manual Not Available Data Units Area Frequency Joules Measurement data may be unavailable at various times of operation The following conditions will result in data categorized as not avail able The instrument power is turned on and no pulse triggers are detected with a pyroelec
4. tion of collection of a batch Average Minimum Maximum Standard deviation If Statistics mode is inactive the following information is available with each data point Joules or watts Pulse rate if a pyroelectric probe is attached Pulse period if a pyroelectric probe is attached e Flags 64 Continuous Data Delivery Mode Computer Interface A data point is internally generated by the instrument according to the following rules With every pulse when a pyroelectric probe is attached and if Statistics mode is inactive With the completion of a batch of pulses when a pyroelectric probe is attached and if Statistics mode is active When a measurement sample is taken when a thermopile or optical probe is attached and if Statistics mode is inactive With the completion of a batch of samples determined by a time period when a thermopile or optical probe is attached and if Statistics mode is active Since thermopile and optical power measurements are continuous in nature not event based as with pyroelectric probes the delivery of this data may be configured as either a stream of sampled points or simply the last point recorded For details refer to Continuous Data Delivery Mode next The host may configure the presentation of data in a record Data ID tags expression and content are configurable If Statistics mode is active all batch data is presented and is not selectab
5. Setup Start Auto Setup Start Trig MeasurementDisplay If attenuation correction is enabled the displayed measurement Screens value is corrected to reflect the true laser output The normal Joules mode display shows a four digit value followed by the appropriate joules unit as shown in Figure 17 through Figure 19 032 7 uJ Figure 17 Joules Mode Normal Display Example 032 7 uJ 1752 Hz Figure 18 Joules Mode Normal Display With Frequency Display Example 34 Operation The example shown in Figure 19 which displays Joules mode integrated power with a thermopile sensor on the first line followed by average power on the second line is only available for 3sigma instruments running firmware V1 07 or later 1 274 mJ 0 656 mW Figure 19 Joules Mode Normal Display With Average Power Display Example Functional Mode Menus Here is a description of all functional mode menus that appear when the Joules mode is selected by using the Function Select switch Auto Selecting this mode automatically restarts the batch count according to the batch size previously set in Setup mode see Setup on page 42 Otherwise the batch count must be manually restarted Avg You may apply data smoothing by configuring the instrument on the Joules Setup screen Avg gt Setup Data smoothing reduces the rapid changing of the measurements on the screen as each new data value upda
6. important operating and maintenance instructions This symbol is intended to alert the operator to the danger of exposure to hazardous visible and invisible laser radiation Electrical Safety gt gt gt Other Safety gt 1 3 Safety SAFETY Carefully review the following safety information to avoid personal injury and to prevent damage to this meter or any sensor connected to it There are no user serviceable parts in this instrument Use only the power cord specified for the meter The grounding conductor of the cord must be connected to earth ground Do not operate the meter if its panels are removed or any of the interior circuitry is exposed Do not operate the meter in wet or damp conditions or in an explosive atmosphere Operate the meter only within the specified voltage range 3sigma User Manual Do not apply a voltage outside the specified range of the input connections Provide proper meter ventilation Do not operate the meter if there are suspected failures Refer damaged units to qualified Coherent service personnel Safety Declaration of Conformity CE I222 Revision AB Declaration of Conformity We Coherent Inc formerly Molectron Detector Inc 7470 SW Bridgeport Road Portland Oregon USA 97224 declare that the 3sigma meets the intent of Directive 89 336 EEC for Electromagnetic Compatibility Compliance was demonstrated per testing to EN61326 Electromagnetic Compatibilit
7. 3Sigma version firmware date a The dash sign delimits all fields within the reply string The first field is always Molectron Detector Inc The second field is the product name 3Sigma The third field is the version number having the format V lt major gt lt minor gt lt optional qualifier characters gt The fourth field is the firmware date having the form lt 3 character month name gt lt day of the month gt lt year gt For example a typical identification string would look like Molectron Detector Inc 3Sigma V1 3B Jul 05 2001 Resets the instrument by putting it into the power up state This command has the same effect as a cold start of the instrument Command RST Query None 70 Self test SC Pi Optional Commands Recall Save Computer Interface Runs the instrument self test procedure Always returns a 0 zero Query TST Reply 0 SCPI specifies various optional common commands All common commands and queries start with an asterisk Refer to the IEEE 488 2 specification for more detailed information Recalls and loads the indicated setup from nonvolatile memory As with the SAV command up to five instrument setups can be recalled from nonvolatile memory The same parameters that were previously saved are recalled Command RCL 01112131415 Query None Recalling setup 0 has special meaning Setup 0 is the factory default setup Saves the current ins
8. Annunciator 27 Unit 23 Wavelength command 68 Wavelength correction enable command 67 Z Zero button 15 3sigma User Manual Coherent Inc 4 2004 Printed in the U S A Part No 0980 0340 0 Rev AB
9. Example i 42 viii Preface U S Export Contol Laws Compliance Product and Publication Updates Preface This manual contains user information for the 3sigma laser power and energy meter It is the policy of Coherent to comply strictly with U S export control laws Export and re export of lasers manufactured by Coherent are subject to U S Export Administration Regulations which are administered by the Commerce Department In addition shipments of certain components are regulated by the State Department under the Inter national Traffic in Arms Regulations The applicable restrictions vary depending on the specific product involved and its destination In some cases U S law requires that U S Government approval be obtained prior to resale export or re export of certain articles When there is uncertainty about the obligations imposed by U S law clarification should be obtained from Coherent or an appropriate U S Government agency To download free 3sigma application software or to view informa tion that may have been added or changed since this publication went to print connect to www coherent com 3sigma User Manual Symbols Used in This Document This symbol is intended to alert the operator to the presence of dangerous voltages associated with the product that may be of sufficient magnitude to constitute a risk of electrical shock This symbol is intended to alert the operator to the presence of
10. Example If the setting is currently 30 W and you press the Down Range button once the setting changes to 3 W Conversely if the current setting is 30 W and you press the Up Range button once the setting changes from 30 W to 300 W These settings are called full scale range which refers to the highest measurement that can be taken before the range has to be adjusted to accommodate the incoming signal As an example if the incoming signal measures 45 W and the current measurement range is 30 W which is full scale range for that setting you will see the OVR short for overrange error message on the display For more information about OVR refer to Range Errors on page 28 In this example the error can be corrected by pressing the Up Range button once to move into the 300 W range which automatically makes 300 W the new full scale range The instrument is limited to a narrow group of adjacent ranges depending on the type and characteristics of the attached sensor and other measurement settings When area correction is enabled cm is appended to Joule and Watt units 27 3sigma User Manual Baseline Clip BC LIP Error Displays Range Enors Pyroelectric sensors produce a negative offset proportional to the average power applied A BCLIP error is produced when the average power and thus the negative baseline voltage exceeds the ability of 3sigma to measure in the negative direction 3sigma normally injects a p
11. data Pressing the Clear button restarts the trace and resets the Max line Trend Display The Trend display is similar to the Tune display except that the data displayed on the chart is a representation of the summary of all samples since the chart was either started or cleared It resembles a once through oscilloscope trace that does not erase or retrace when it reaches the right edge of the chart The size of the Trend buffer is configurable in either pulses for pyro electric sensors or elapsed time for thermopile and optical sensors The chart display refreshes at 9 Hz Each trace is composed of the average of all the measurement values consumed by the instrument 40 Trend History Size Operation in the trend incremental update interval The trend incremental update interval is the trend history size divided by the number of trace plotted points in the chart A numeric scale having four reference points is located on the outside of the left edge of the chart shown in Figure 26 Maximum and minimum level dashed lines appear at the maximum and minimum values respectively as measured since the Trend mode was either started or cleared The minimum and maximum measure ment values are displayed in the annunciator bar If the attached sensor is a pyroelectric sensor the trace will not proceed unless there is triggering Figure 26 shows an example of the trend display 3 00 2 00 1 00 0 00
12. ee ae eed ele ee 48 Data Received by the Instrument as 48 Table of Contents Data Sent by the Instrument u a Hasena 48 Using an RS 232 eri aces aceite se cces une 48 Data Pacino 48 SEINIEO BREUER RS 48 Kill Output Request usina ici ae ee In 49 SI ee er Te 49 Host Command Quick Reference cccccccccssssssscecesceecsesessaccecececseessenseaeceseceeseeessaeaeeesees 50 Communication CONMMIS a a BI aT ea Measures 54 A A O 54 Bald Rate O Es 54 Data Pacino lado it baii 54 A seaeadeveeydaa AE eld a R A AEA A s 55 SOPA AA OA 55 SLAA tk COMES EEE E E EEEa EE E EEA las ATT 55 Display Command ES OS 55 Display learn ae essen 55 Display Textil ir ii 56 Error Com ande ci dsc 56 All Error uses ein 57 All Error Clear kan path ea a a A a TEA 57 FEOF OUI EEE A E A E E TT 57 Single Brror A ee es 57 Instrument and Probe Device Information Commands cccccccessesssseceseceeeeeessaeceeeeeens 58 Instrumenten TT 58 Calibration Dale sl Yasha ak 58 Sen al Number di tia 58 Probe sank seen ci 58 Calibration Dale ara ren 58 Model sunshine ah eek 58 RESPONSI A A A a EEA aii 59 Serlal Number ans 59 Head Temperature srank a ERS 59 e a N 59 Measurement Data Collection Commands a a a ai 59 Data Gans idas T a 59 AD ai 59 A ash 60 A QUST Y EE EEE EE E E E OEE N E ee 60 Petch All AvailableRegerds an Jan ee 60 Fetch Missing Data Records Count aaa 60 Fetch Next Available Record s cccccccccccce
13. is in ASCII string form When multiple data items are found in a single data record the data items are separated by commas All measurement data uses the fundamental units of its measured quantity Example When measuring power watts not milli watts are the fundamental unit The only exception is the times tamp which is expressed in 200 usec intervals Units of statistical data are expressed in the natural unit for the attached probe The natural unit for pyroelectric probes is joules and the natural unit for thermopile and optical probes is watts The unit tags are implied and never included in the data strings When a pyroelectric probe is attached watts is computed from joules as the product of joules times frequency When a thermopile or optical probe is attached joules is computed from watts by inte grating power over time Data headers may be enabled A header is a data value identification string that precedes each data value to indicate the data type Headers have the form lt tag gt For example if only PRI is requested and headers are enabled a data record could look like PRI 2 665E 3 as opposed to simply 2 665E 3 for disabled headers The strings used in the header tags are the same strings used when the CONF READ SEND command was issued The presentation of the multiple data items is in PRI HZ PER FLAG order depending on which tags were selected The order cannot be altered 74 Troubleshooting TROUBL
14. mW milliwatts W watts kW kilowatts s MW megawatts GW gigawatts TW terawatts When area correction is enabled all units are expressed in terms of watts per cm In other words the cm is always appended to the watts units Wavelength is expressed in nm nanometers 23 3sigma User Manual Annunciators Attenuator All annunicators display in a fixed position on the annunciator bar Which annunciators display in the annunciator bar are determined by the specific type of sensor being used and the options you select There are six versions of the annunciator bar Four are shown below The other two are related to the Tune mode and appear under Tune on page 39 Trg Avg 999 940nm PS Att 1 234E9 Rng 300u Figure 10 Annunciator Bar Pyroelectric Sensor Spd Auto Avg 999 940nm Oo Att 1 234E9 Rng 300u Figure 11 Annunciator Bar Thermopile Sensor Watts Mode Rdy Avg 999 940nm Oo A Att 1 234E9 Rng 300u Figure 12 Annunciator Bar Thermopile Sensor Joules Mode Auto Avg 999 940nm Oo Att 1 234E9 Rng 300u Figure 13 Annunciator Bar Optical Sensor Watts Mode The attenuation factor is a ratio and has no units If attenuation correction is enabled the Attenuator annunciator position displays ATT followed by the attenuation factor Otherwise the Attenuator annunciator position is blank 24 Auto Range Batter
15. rate of 3 Hz except in Tune mode which has an update rate of 9 Hz The display is visually divided into three horizontal sections top center and bottom as shown in Figure 6 Top Section Annunciator Bar status annunciators and icons Center Section Main Display measurement values graphs and charts Bottom Section Button Bar Figure 6 Display Sections Top Section Annunciator Bar The top section displays annunci ators indicators which appear as either text or icons 13 3sigma User Manual Display Control Button B Contrast Center Section Main Display This section shows measured and computed values charts and graphs Bottom Section Button Bar The bottom part of the display is the soft button definition section This section is divided into five columns with each column corresponding to a button located imme diately below it along the bottom edge of the display The text displayed in each column indicates the current function of the corre sponding button exceptions are noted below Tapping the Display Control button that is pressing the button and then releasing it within 1 2 second toggles the on off state of the backlight regardless of the backlight mode timed or normal If the Display Control button is held for more than Y2 second the display contrast is cycled in slow increments When adjusting contrast release the butt
16. samples to arrive at the best range Auto ranging does not apply when a pyroelectric probe is attached Command CONFigure RANGe AUTO DEFaultlONIOFF Default is OFF Query CONFigure RANGe AUTO Reply ONIOFF Selects the instrument measurement range expressed in scientific notation The range value is normalized to the next highest 3 scale Command CONFigure RANGe SELect lt float of form m mmmE ee gt Default is not applicable Query CONFigure RANGe SELect MAXimumIMINimum Reply lt float of form m mmmE ee gt Using the optional MAX and MIN parameters results in the maximum or minimum range that can be used for the units selected and the currently connected probe If auto ranging is active the range returned from the query may not be the same as the range selected 68 Statistical Batch Control Batch Size Statistics Mode Enable Computer Interface Sets statistics calculation parameters used in the statistics operating mode Pulses Sets the statistics batch size that will take effect at the end of the current statistical batch Batch size units are in pulses This command applies only when a pyroelectric probe is attached Command CONFigure STATistics B ATchsize PULSe DEFaultl2 99999 Default is 100 Query CONFigure STATistics BATchsize PULSe Reply 2 99999 Time Sets the statistics batch size that will take effect at the end of the current statistical batch Batch size units are in s
17. topic soft button accesses a data entry screen This section describes each of the data entry screens Setup Save You can save the current instrument setup in one of five user defin able setup positions Setup Recall Use this soft button to recall any one of five previously saved setup configurations or reset the instrument to factory default Wave You can configure the instrument to make measurement data correc tion based on the wavelength of the laser Sensors are calibrated at a single wavelength and include a wavelength correction table for use when the wavelength differs from the calibration wavelength You can enter the actual wavelength of the laser and if wavelength correction is to be enabled Valid selections for the enable field are On and Off If wavelength correction is disabled that is Off the wavelength field displays as invalid Atten Press this button to configure the instrument to make measurement data correction based on the presence of an optical attenuator with a known attenuation factor You can also enter the attenuation factor and enable attenuation correction Attenuation is between 1 000E0 and 1 000E6 Valid selections for the enable field are On and Off Area You can configure the instrument to express measurement data as a function of area by entering the beam area and enabling area correc tion Area is limited from 0 001 to 999 999 cm Valid selections for the enable field are On and O
18. 22 O Eee ee tan ee 22 iii 3sigma User Manual DE e S EE 23 RESDOBSIVIN rs Ra ee 23 Walls san see Reli 23 Ma else 23 VANNOI DaO E LKO LS spider lea 24 Attenuator sa ee lese In el 24 Auto RANG ire 25 Battery Stats ia ET RE E 25 Display Average a AS II 25 SEHSOT STANS di ee 25 P lse Sampling diia 26 Range idun e a a a A day edad aa AE EATE E PEE E I Ea E Kia 26 Reddy sea eures 26 SPESEN entire 27 rs ser A EE BE SHE 27 A er 27 Range Selection ig TE AEE nn ibn 27 Baseline Chp BELIP aussehen 28 Error Display Seen a e riada a 28 RANGE Prog ioe a a a aa a E O ceotien 28 A E EAE E EE AE EIET EE AE T 29 Unexpected Pro a nalen 29 Power Up DUS play essen ora deaden ited ons anes dane ede 31 Data ENY a lis 31 Meihodeldsy nase ies 31 Tistrument Modest ld ici 33 TOMES A A 34 Measurement Display Sereens ns ken 34 Punctional Mode Menus nsscsssninn anunsio 35 Watts hose ce tetas bene ehe o e 36 Measurement Display Sereensiu neuem inhalt 36 Punetional Mode Mess a Nee 37 AAU Coats tac So calc a E E E SER ICBINERDEPEDENERHE FESTE ERIUBEEREEL ASDLEESEIEE NER 39 Tine Display sie 39 Trend Display ns aan an 40 Trend History Size iii Ru ep 41 ZOOM SEISCHLONS ta a a corro ed oder el 42 SAT o EEA E AE ee 42 Setup Screen Details iiin a e E E E GR 43 Navigation Methodology mn 43 Setup Topics eine A E di 44 Oak a 46 Computer Interface e eenennnenensnnennnn 47 SPERlalConsideralions ona 48 Data Terminator slip
19. BLE FOR ANY INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGES IN CONNECTION WITH ITS PRODUCTS In order to obtain service under this warranty Customer must notify the Company of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service The Company shall in its sole discretion determine whether to perform warranty service at the Customer s facility at the Company s facility or at an authorized repair station If Customer is directed by the Company to ship the product to the Company or a repair station Customer shall package the product to protect from damage during shipping and ship it to the address specified by the Company shipping prepaid The customer shall pay the cost of shipping the Product back to the Customer in conjunction with annual recalibration and repair the Company shall pay the cost of shipping the Product back to the Customer in conjunction with product failures within the first twelve months of time of sale or between annual recalibrations A Returned Material Authorization number RMA assigned by the Company must be included on the outside of all shipping packages and containers Items returned without an RMA number are subject to return to the sender 79 3sigma User Manual For the latest Customer Service information refer to our website www coherent com Detailed instructions on how to prepare a product for shipping are shown under Product Ship
20. ESHOOTING Table 10 lists possible problems and their solutions Table 10 Troubleshooting Guide Attenuation correction does not This is aknown bug for instruments Contact Coherent to arrange for a function when a thermopile sensor running firmware Version 1 05 firmware upgrade is connected to 3sigma Optical and pyroelectric sensors are not affected When using 3sigma picowatts are This is aknown bug for instruments Contact Coherent to arrange for a incorrectly reported as femtowatts running firmware Version 1 05 firmware upgrade and picojoules are incorrectly reported as femtojoules 75 3sigma User Manual 76 Calibration and Warranty CALIBRATION AND WARRANTY Calibration Coherent Calibration Facilities and Capabilities This section includes information on the following topics Calibration this page A Coherent calibration facilities and capabilities this page Limited warranty page 78 Extended lifetime warranty page 78 Warranty limitations page 79 Obtaining service page 79 Product shipping instructions page 80 Coherent laser power and energy meters are precision instruments capable of delivering very accurate measurements as well as providing many years of useful service To maintain this high level of performance it is important to have your measurement system serviced and recalibrated once a year As the largest laser manufacturer in the world Coherent
21. Ponsivity Reply lt float of form m mmmE ee gt Queries the serial number of the probe Command none Query SYSTem INFO PROBe SERNumber Reply lt probe serial number gt Queries the head temperature of the probe Command none Query SYSTem INFO PROBe TEMPerature Reply lt probe head temperature in degrees celsius gt Queries the currently connected probe type Command none Query SYSTem INFO PROBe TYPE Reply NONEITHERMOIPYROISIL All measurements available from the front panel of the instrument are also available through the host interface Measurement data is acquired from the instrument using the Measurement Data Collec tion commands explained in this section The host has control over the quantity of measurement data being read and when it is read Data collection is gated on and off using the INITiate and ABORt commands Data logging is enabled after an INITiate command Data logging is disabled after an ABORt command Front panel operation is not affected by the host gating commands Disables measurement data collection Command ABORt Query none 59 3sigma User Manual Initiate Data Query Fetch All Available Records Fetch Missing Data Records Count Fetch Next Available Record s Enables measurement data collection This automatically resets the measurement data buffer to empty and clears the missing error count Command INITiate Query none The host must query for measurem
22. Probe Device Information Commands Instrument Calibration Date Serial Number Probe Calibration Date Model For the purposes of unit identification and quality control the instru ment as well as compatible probes can be queried Queries the calibration date of the instrument Query SYSTem INFO INSTrument CALDate Reply lt instrument calibration date gt The date is expressed using the format lt 3 character month name gt lt day of the month gt lt year gt Queries the serial number of the instrument Query SYSTem INFO INSTrument SERNumber Reply lt instrument serial number gt If a probe information query is made with no probe connected the host interface generates an error Queries the calibration date of the probe Command none Query SYSTem INFO PROBe CALDate Reply lt probe calibration date gt The date is expressed using the format lt 3 character month name gt lt day of the month gt lt year gt Queries the currently connected probe model Command none Query SYSTem INFO PROBe MODEL Reply lt probe model string gt The probe model string is the catalog name describing the attached probe 58 Responsivity Serial Number Head Temperature Type Measurement Data Collection Commands Data Gating Abort Computer Interface Queries the currently connected probe responsivity The units of responsivity depends on the probe type Query SYSTem INFO PROBe RES
23. Setting shimano an ii ia bie 42 5 Backus Naur Form BNF Notation ooocccccconnonononnnnnonnnnnnnnnanonononnononnnnnonnnoncononnanonononnncnnon 49 6 Host Command Quick Reference nase Een 50 7 Function Select Switch Output Data Types cian ee ae 64 8 Data Value Set Send Bit Qualification Meaning 2240022000ssssenssnsenssnnennnnennn anne 67 9 Status Bit Mapping ies 73 10 Iroubleshostins Gilde anstatt nl 75 11 Coherent Service Center iria saccade sodeausaaereicescavcuensnonsatebensaeteatns 80 12 Bacon Default Seine en Nessie 85 13 SDEEINLAHONS meer O EOS rios 87 14 RS 232 EMOS essen 88 15 Mini DIN 6 pin to DB 9 Wiring Configuration oooocooocccnnucccnonnnononcnonnnnnnnnnccnnnnccnnnnccnancnnnns 89 vii 3sigma User Manual SINN De NONNNNNDN DO MR RRR RR RRR m ODO NMNYM BON POW DAAMR WNP OS LIST OF FIGURES Measuring Average Power With a Pyroelectric Sensor cooonnoccnocnocnnonnnonnnnonncnoncnnnnc nan ccoo cnn 6 Measuring Power With a Thermopile or Optical Sensor 20002240sssnnessnnensnnenennnn 7 Measuring Energy With a Pyroelectric Sensor eeccecesccecesececeseeeceeeceeeeecseeeecsseeecsteeeesaes 8 Measuring Energy With a Thermopile Sensor ceecceeesececsscecseeceseceeceeeeeceeeecsteeeceeeeeeaes 9 Front Panel u4u G 22u 22a ea Nee 13 Display Sections series BEN eigene 13 LCD Display Contrast Adjusiment 2 22 ra ER EEE 14 Rieht Side Panel exec a A A sr 18 bett Side P
24. User Manual 3sigma Single Channel Laser Power Energy Meter COHERENT User Manual 3sigma Single Channel Laser Power Energy Meter COHERENT 7470 SW Bridgeport Rd Portland OR 97224 3sigma User Manual This document is copyrighted with all rights reserved Under the copyright laws this document may not be copied in whole or in part or reproduced in any other media without the express written permission of Coherent Inc Permitted copies must carry the same proprietary and copyright notices as were affixed to the original This exception does not allow copies to be made for others whether or not sold but all the material purchased may be sold given or loaned to another person Under the law copying includes translation into another language Coherent the Coherent Logo and 3sigma are registered trademarks of Coherent Inc Every effort has been made to ensure that the data given in this document is accurate The information figures tables specifications and schematics contained herein are subject to change without notice Coherent makes no warranty or representation either expressed or implied with respect to this document In no event will Coherent be liable for any direct indirect special incidental or consequential damages resulting from any defects in its documentation Technical Support In the US Should you experience difficulties with your product or need technical information please visit our
25. a east 72 System tall bands 73 Trigger Commands anecon an ida nadal inas 73 O 73 Output Data Format ai tao daa 74 Genera Data Lomas A 74 US tes a 74 Her A dins 74 Ordino 74 Troubleshooting eeenennnnnnnnnnn 75 vi Table of Contents Calibration and Warranty eeeeeeenenennenennnn 77 C ahbration in eat oca an ehe 2 Coherent Calibration Facilities and Capabilities 222000220002 200 snsenssnnennnnnennnn nenn 11 Limited Warranty apt E E outa do 78 Extended Lifetime Warranty casilla iii nadie una ie 78 Warranty LICONSA dit antes EE E acetal 79 IN 79 Product Shipping Instructions aa a oa ee Oe ee ee 80 Appendix A Programming Examples eenen 81 Measurement Operations sanos A aside ash O 81 A Simple Measurement ds 81 Collecting Measurement Data ans ale 82 Collecting Error Information ai ea ae rd 82 Appendix B Default Settings 85 Appendix C Specifications eeeeesensensensenenne 87 RS 232 PINMOUES cast ia reset le er 88 RS 232 Cable Assembly aussen sense iss lea ssaneipedehhie 89 A lt gt nase een 91 LIST OF TABLES 1 Pulse Sampling According to the Number of Incoming Pulses 2200 en 26 2 Functional Mode Menus Joules Mode cccssccccccccecsesesscececcceesesensececececeesenscaeeeseeeens 34 3 Functional Mode Menus Watts Mode cccssccccccccecsesesscecesececessnsesececcesesesenssaeeeeeeeens 37 4 ZOOM
26. ace 1 Powering up 3sigma with a pyro sensor attached In this case the zero cycle runs automatically as part of the power up sequence 2 Plugging in a pyro sensor when the instrument is already powered up 3 Pressing the Zero button In pyro mode pressing the Zero button always causes the instrument to run a zero cycle on the sensor There is no need to press the Zero button unless a BCLIP error occurs For more information about BCLIPs refer to Baseline Clip BCLIP on page 28 Depending on how far out the baseline is the zero cycle takes from Y to 3 seconds A Wait indicator appears on the screen while the zero cycle is running For accurate pyro zeroing There must be no pulses coming out of the sensor To get an accurate zero shut off the beam or remove the sensor from the beam wait three seconds for the sensor baseline to stabilize and then press the Zero button Measurements can resume once the zero cycle is complete Run the sensor within the specified repetition rate If the sensor is running at a higher than specified repetition rate and a Auto Button Range Buttons Soft Buttons Description BCLIP error occurs pressing the Zero button may not clear the EITOT For more information about BCLIPs refer to Baseline Clip BCLIP on page 28 This section only pertains to thermopile sensors except in Joules mode and optical sensors Pressing the Auto button instructs the 3
27. aging command 63 Data gating command 59 Data pacing command 54 Data query command 60 Data value headers command 66 Data value set send command 66 Date unit 22 Display 13 Average annunciator 25 Commands 55 Display clear 55 Display text 56 Control button 14 Data 21 Invalid data 21 Not available data 22 Stale data 21 Units 22 Area 22 Date 22 Frequency 22 Joules 22 Percent 23 Responsivity 23 Wavelength 23 Display clear command 55 Display textcommand 56 E Error Commands 56 Allerror 57 Allerror clear 57 Error count 57 Single error 57 Count command 57 Displays 28 Range 28 Typical 29 Unexpected 29 Error count command 57 F Fetch all available records command 60 Fetch available record count command 61 Fetch missing data records count command 60 Fetch next available record s command 60 Frequency unit 22 Front panel 13 Auto button 17 Display 13 Display control button 14 Function select switch 15 Range buttons 17 Soft buttons 17 Zero button 15 Function select switch 15 Function switch position command 62 H Head temperature command 59 Host command quick reference 50 I Identification command 70 Initiate command 60 Instrument and probe device information commands 58 Instrument 58 Calibration date 58 Serialnumber 58 Probe Calibration date 58 Head temperature 59 Model 58 Responsivity 59 Serialnumber 59 Type 59 Invalid data 21 J Joules unit 22 L Left side panel 19 Analog out connection 19 Pr
28. an overrange error occurs the range must be adjusted by returning to the W mode When 3sigma is prepared for the first measurement the READY indicator displays at the top of the screen During the measurement the INT indicator displays showing that the meter is currently integrating the reading The ZERO button should not be pressed between measurements Unblock the beam take the measurement and observe the result on the LCD Figure 4 Measuring Energy With a Thermopile Sensor 3sigma User Manual Description DESCRIPTION Thank you for purchasing 3sigma a multifunction portable laser power energy meter that is compatible with many of our pyroelectric sensors as well as our PowerMax thermal sensors and new optical sensors This section discusses the following topics Sensor compatibility page 12 a Front panel page 13 Right side panel page 18 Left side panel page 19 Specific features and capabilities of the 3sigma include b High resolution 4 VGA dot matrix LCD display Compact rugged enclosure that includes a protective cover and stand a Auto range thermopile and optical sensors only RS 232 port standard Analog output Smart probes pyroelectric thermopile Silicon Germanium and InGaAs Tune mode s Joulemeter Wide dynamic range 50 nJ to 300 J 1 to 1 000 Hz Capture every pulse to 1 kHz Pulse sampling to 4 kHz e Statistical functions average standard devi
29. anel t ce it ze a eek terest ae ee en een 19 Annunciator Bar Pyroelectric Sensor ccesecesscecssscecssecesssccecssececssccecsscesessceesseeeesseeeens 24 Annunciator Bar Thermopile Sensor Watts Mode ooooooccccnocccoooccononcccnnnncnnnncnnnnnccnnncccnnnos 24 Annunciator Bar Thermopile Sensor Joules Mode oooconoccnnnccnocononnnonnccononannnonn non ncnononnnos 24 Annunciator Bar Optical Sensor Watts Mode 2u s244rs0nesnnernnnennesnnennnn essen nme 24 Error Window anal 29 Button Bar Soft Button Edit Functions uuesseersenesnnernnnennersnnesnnennnnennnensnnennnennnn ern nnnn 31 Operational Mode Settings hrsg 33 Joules Mode Normal Display Example cecccecssccecesceceseeeceeceeceeeeeceeeeecseeeeeeeeeesteeeees 34 Joules Mode Normal Display With Frequency Display Example uueene 34 Joules Mode Normal Display With Average Power Display Example 35 Joules Mode Statistics Display With Pyroelectric Sensors Example rn 36 Watts Mode Normal Display Example ccesccesscecesceceeeeeceeceeceeceeceeeeeceeeeeneeeenaeeees 37 Watts Mode Normal Display With Frequency Display Example uene 37 Watts Mode Statistics Display With Pyroelectric Sensors Example 39 Watts Mode Statistics Display With Thermopile or Optical Sensors Example 39 Tune Display Example ee 40 Trend Display Example id nsennel 41 Setup Screen
30. ansmit from 3sigma to computer ESE AAA The above pinout chart refers to the connector on the 3sigma 88 Appendix C Specifications RS 232 Cable Table 15 shows the wiring configuration between the mini DIN Assembly 6 pin connector and a DB 9 connector Table 15 Mini DIN 6 pin to DB 9 Wiring Configuration MINI DIN 6 PIN DB 9 PIN Shell Shell EL Locking Mini DIN 6 Pin Connector wil DB 9 Connector Female 89 3sigma User Manual 90 Index INDEX A Abort command 59 All error clear command 57 Allerror command 57 Analog out connection 19 Analog output source command 62 Annunciators 24 Attenuator 24 Auto range 25 Battery status 25 Display average 25 Probe status 25 Pulse sampling 26 Ready 26 Speedup 27 Trigger 27 Wavelength 27 Aperture areacommand 61 Area correction enable command 61 Area unit 22 Attenuation correction enable command 61 Attenuation factor command 62 Attenuator annunciator 24 Auto Button 17 Range annunciator 25 Auto power off command 72 Auto range enable command 68 B Backlight command 72 Baseline Clip 28 Batch size command 69 Battery status annunciator 25 Baud rate command 54 BCLIP 28 C Calibration 77 and warranty 77 Calibration date instrument 58 Calibration date probe 58 Calibration date command instrument 58 Calibration date command probe 58 Commands Abort 59 All error 57 A
31. ation minimum or maximum for 2 to 99 999 pulses s Power Meter e Measure power or long pulse energy Wide dynamic range 1 nW to 10 kW power or 10 mJ to 300 J energy Ambient offset 11 3sigma User Manual Sensor Compatibility a Precise wavelength correction Statistical functions average standard deviation minimum or maximum for 2 to 9 999 seconds The versatile 3sigma measures Power W Energy J Frequency Rep Rate Hz a Fluence J cm 2 3sigma is applicable for Field service Laser production test G Medical laser system performance Optical power Pulsed laser energy stability The sensors listed below are compatible with 3sigma if the sensor was shipped to you January 2002 or later If you purchased one of these sensors prior to that date please contact Coherent refer to Table 11 on page 80 J5 09 J5 09B J5 09 2k J25LP 1A J25LP 2A J25LP 3A J25LP 4A J25LP 3A 2K J25LP 4A 2K JSOLP 1A JSOLP 2A JSOLP 3A JSOLP 4A JSOLP 3A 2K JSOLP 4A 2K Front Panel Description Figure 5 shows the layout of the 3sigma front panel Display nn Display Control Button Function Select Switch Zero Button Display Soft Buttons Range Buttons Auto Button Figure 5 Front Panel The LCD display is where all available information either text or graphics appears It refreshes at a
32. cted status A fixed sensor symbol indicates a sensor connected condi tion and a blinking sensor symbol indicates a sensor not connected condition 25 3sigma User Manual Pulse Sampling Pulse sampling refers to how many pulses are read within a series of pulses For example when receiving 2 500 pulses per second pulse sampling reads that is samples every third incoming pulse Table 1 shows how many pulses are sampled depending on the number of incoming pulses per second Table 1 Pulse Sampling According to the Number of Incoming Pulses INCOMING PULSES PULSES READ lt 1 000 Every pulse is read pulse sampling is not active 1 000 to 2 000 Every other pulse is read 2 001 to 3 000 Every third pulse is read 3 001 to 4 000 Every fourth pulse is read gt 4 000 Pulse sampling continues but is not within instrument specifications Range Ready The Pulse Sampling PS icon appears in the annunciator bar only when pulse sampling is actually taking place If a sensor is attached the currently selected range displays in the Range annunciator position The range is displayed as RNG followed by the full scale range display value of the primary measurement mode for the attached sensor For pyroelectric sensors the primary measurement mode is joules J For thermopile or optical sensors the primary measurement mode is watts W The unit identifier J or W does not display as part of the annunciator If no sensor is attac
33. d or sending XON while enabled is redundant and has no additional effect It is essential to avoid disabling data flow for long periods of time to avoid losing data due to send buffer overflow If data flow is enabled with data already in the buffer the data is immediately sent as fast as the baud rate allows The instrument occasionally needs to signal the host that data is available to read The host can wait for the service request marker ASCII ENQ or decimal 5 byte which indicates that data is avail able Available data can be either measurement data or error infor mation In most cases the host remote control program knows the source of the available data from its current activity and can retrieve 48 Computer Interface the data using the appropriate commands The service request marker will not be sent when the host is waiting for a reply from a query The RS 232 service request marker can be selected enabled or disabled If it is disabled the host must poll for available data Kill Output Request 3sigma is capable of storing 10 000 data records When a fetch record query is executed for a large number of records the time to transmit those records can be prohibitively lengthy By sending a kill output request ASCH ESC or decimal 27 byte you can have the host terminate the transmission of lengthy data in process When the instrument receives the kill output request data being sent at the moment the request is received wi
34. e selected mode is not Timed the time field is dimmed invalid Auto Power You can configure the Automatic Power Off mode of the instrument and assist in battery charge conservation by using the automatic power off timer to manage power With this feature enabled the instrument automatically turns off after a configurable period of front panel inactivity The auto power off timeout value range is 10 to 60 minutes Valid selections for this mode are Timed or Off If the selected mode is not Timed the time field is dimmed invalid Analog Out Press this button to select the voltage source of the analog output connector Valid selections for the analog output source are Live and Sampled Live displays the incoming sensor signal pulse for pulse after it passes through a buffer Live may also include input from other sources for example noise artifacts Live is available only with a pyroelectric sensor The Live sensor input may be attenuated by a factor of ten before it is buffered to the analog output 45 3sigma User Manual Off Sampled means the analog voltage output is proportional to the energy in a pulse Full scale energy is represented by one volt For example a pulse energy at full scale always equals one volt a pulse energy at half scale always equals one half volt etc Sampled analog output source only Analog out may have as much as a 12 mV offset To measure offset disconnect the sensor and measure the vo
35. easurement data This command only applies when a thermopile or optical probe is attached Command CONFigure AVErage TIME DEFaultlOFFI2 999 Default is OFF Query CONFigure AVErage TIME Reply OFFI2 999 63 3sigma User Manual Measurement The data format commands are used to configure the form in which Data Format the instrument sends measurement data to the host Data is sent to the host in ASCII text records A record is a set of one or more data values generated at the same instant The front panel Function Select switch directs the focus of the type of measurement data that is presented at the host interface For example if the switch is set to J you can expect to obtain only energy readings from the host interface Table 7 details the output data types for the Function Select switch settings Table 7 Function Select Switch Output Data Types FUNCTION SWITCH SETTING OUTPUT DATA TYPE Tune Joules for pyroelectric probes watts for thermopile and optical probes Setup Joules for pyroelectric probes watts for thermopile and optical probes Off None If area correction is active the above units are expressed as units per square centimeter Measurement data presented at the host interface differs depending if Statistics mode is active or inactive for more details refer to Statistics Mode Enable on page 69 If Statistics mode is active the following data is available in a single data record at the comple
36. econds This command applies only when a thermopile or optical probe is attached Command CONFigure STATistics B ATchsize TIME DEFaultl2 9999 Default is 100 Query CONFigure STATistics BATchsize TIME Reply 2 9999 Enables or disables statistical data collection and reporting Command CONFigure STATistics MODE DEFaultIOFFION Default is OFF Query CONFigure STATistics MODE Reply OFFION Statistics mode cannot be enabled if Data Averaging is enabled 69 3sigma User Manual Restart Mode Restarta New Batch SC Pi Mandatory Commands Identification Reset Selects the action to be taken at the end of a statistical batch AUTO matic begins a new batch immediately upon logging the data from the previous batch MANual requires the start signal see Restart a New Batch below Command CONFigure STATistics RES Tartmode DEFaultIMANuallAUTOmatic Default is MANual Query CONFigure STATistics RESTartmode Reply MANIAUTO Terminates the current statistical batch and starts a new one Command CONFigure STATistics START Query none SCPI specifies a minimum set of IEEE 488 2 common commands the mandatory commands All common commands and queries start with an asterisk Refer to the IEEE 488 2 specification for more detailed information Queries the instrument identification string such as model name firmware version and firmware date Query IDN Reply Molectron Detector Inc
37. ecords PRI 1 449E 03 FLAG 00000000 This record shows a data value of 1 449 mJ and no flag bits set PRI OVR FLAG 00008000 This record show an invalid data value with the over range bit set Probe Wavelength Conection Wavelength Enables or disables wavelength correction EMPERO Command CONFigure WAV Elength CORRection DEFaultIOFFION Default is OFF Query CONFigure WAVElength CORRection Reply OFFION 67 3sigma User Manual Wavelength Range Control Auto Range Enable Range Value Select Sets the operational wavelength Compensation for the wavelength is determined by the compensation table supplied by the connected probe This value is transient The default wavelength read from the probe is applied at power up or when the probe is plugged in Command CONFigure WAVElength WAVElength lt 0 99999 gt Default is not applicable Query CONFigure WAVElength WAVElength MAXimumIMINimum Reply lt 0 99999 gt Using the optional MIN and MAX parameters results in the minimum and maximum wavelengths that can be used for the connected probe Stated accuracy is only guaranteed when the requested wavelength coincides exactly with a calibration wave length stored in the attached probe Enables automatic selection of the instrument measurement range When auto ranging is active the instrument hunts for the best measurement range for the current probe and laser conditions The hunt procedure may require several
38. el is the percentage of the full scale value of the current range at which a trigger is detected Trigger level can be set from 2 to 20 percent Power watts measurements may be taken using pyroelectric sensors for pulsed lasers thermopile sensors for pulsed or contin uous lasers or optical sensors for continuous lasers There are slight variations in the user interface depending on which type of sensor is being used Measurement data is always displayed in the Main Display section If attenuation correction is enabled the displayed measurement value is corrected to reflect the true laser output 36 Operation The normal Watts mode display shows a four digit value followed by the appropriate watts unit as shown in Figure 21 and Figure 22 13 64mW Figure 21 Watts Mode Normal Display Example 13 64mW 748 Hz Figure 22 Watts Mode Normal Display With Frequency Display Example Table 3 lists the functional mode menus available in Watts mode Table 3 Functional Mode Menus Watts Mode THERMOPILE OR FUNCTION MODE PYROELECTRIC SENSOR OPTICAL SENSOR Statistical Auto Setup Speed up Start Auto Setup Start Trig Functional Mode Here is a description of all functional mode menus that appear when Menus the Watts operational mode is selected by using the Function Select switch Auto Selecting this mode automatically restarts the batch count according to the batch size previously se
39. ent data in two steps 1 query for the number of data records available N and 2 query N times for the data records The instrument stores a maximum of 10 000 data records For detailed information refer to Output Data Format on page 74 Data record queries are destructive reads As each data record is read by the host the data record count automatically decrements by one Queries for all available data records at the time of the query Command none Query FETCh ALL Reply lt all available records gt Queries for the number of missed data records due to buffer over flow Command none Query FETCh MISSing Reply lt count of missing data records gt Queries the next available data record s at the time of the query More than one data record may be queried using the optional lt record count gt parameter Command none Query FETCh NEXT lt record count gt Default for lt record count gt is 1 Reply lt next available record s gt 60 Fetch Available Record Count Measurement Setup Commands Area Conection Aperture Area Area Conection Enable Attenuation Attenuation Conection Enable Computer Interface Queries the number of data records available at the time of the query Command none Query FETCh NRECords Reply lt count of records available gt The instrument may be configured to measure data through the host interface as well as the front panel Many of the setup c
40. ersion mismatch The sensor data EEPROM version has exceeded the capability of the instru ment firmware That is the instrument does not recognize the newer sensor EEPROM format Return the instrument to Coherent for a firmware upgrade Probe NVRAM corrupt The sensor EEPROM is corrupted Return the sensor adapter to Coherent for reprogramming Unrecognized Probe The instrument does not recognize the attached sensor The sensor is either not a valid Coherent product or does not have a functioning EEPROM Readings are not allowed If a problem persists contact Coherent for assistance see Coherent Service Centers on page 80 30 Power Up Display Data Entry Methodology Operation The unit powers up in less than a half second after turning the instru ment on If any errors are detected during power up initialization the instrument attempts to immediately display an unexpected error condition When power up initialization is complete the instrument is in the state of the last power down The state may be modified due to a different sensor attached or a different function switch setting If no sensor is attached the instrument immediately displays a No Probe error condition The data entry screens are located entirely in the center display section The button bar shown in Table 15 contains Left arrow Right arrow Up arrow Down arrow and Enter buttons which define the edit functions of the soft buttons
41. eue 57 x SYSTem INFO INSTrument SERNumber 58 SYSTem INFO PROBe SERNumber Queries probe serial number ICO CCC E Data Query 55 56 a SI 5 SQ a SI 58 58 59 59 59 9 51 3sigma User Manual Table 6 Host Command Quick Reference Continued FETCh ALL Queries all available data records buffer overflow FETCH NRECon a 2 CONFigure AREA CORRection 61 2 CONFigure ATTEnuation FACTor 62 p CONFigure ZERO Sets current probe input voltage as zero baseline voltage Display Data Averaging CONFigure AVErage PULSe Sets data averaging window size pyroelectric 63 probes CONFigure AVErage TIME Sets data averaging window size thermo 63 pile optical probes Measurement Data Format CONFigure READings CONTinuous Selects mode of data delivery thermopile optical 65 probes CONFigure READings HEADers Selects if data value ID strings prefix values are used CONFigure READings SEND Selects which non statistical measurement data is reported Probe Wavelength Correction CONFigure WAVElength CORRection Enables or disables wavelength correction 52 Computer Interface Table 6 Host Command Quick Reference Continued CONFigure WAVElength WAVElength Sets operational wavelength 68 Range Control Enables automatic selection of instrument measurement range Selects instrument range Sets statistics batch size pyroelectric probes CONFigure STATistics BATc
42. ff Speedup thermopile sensor only Speedup is prediction of measurement data to better reflect true measurement values It is used to obtain quicker measurement data as the sensor initially heats up Valid selections for the Speedup mode are Full and Partial Full speedup means the instrument always applies the speedup algorithm to measurement data Partial speedup indicates the instrument applies the speedup algorithm only when the difference between the true and predicted measured values is greater than 1 When displayed measurement 44 Operation data is calculated using the speedup algorithm SPD displays in the Speedup annunciator position Otherwise the Speedup annunciator position is blank Comm On this menu you can configure serial port communication parame ters for the host interface Valid selections for baud rate are 9600 38400 57600 or 115200 Valid selections for stop bits are or 2 Valid selections for parity are None Even or Odd Valid selections for pacing are None or Xon Xoff Backlight Press this button to configure the Display Backlight mode of the instrument and assist in battery charge conservation by using the automatic backlight timer to manage the display backlight With this feature enabled the backlight automatically turns off after a config urable period of front panel inactivity The backlight timeout value range is 1 to 20 minutes Valid selections for this mode are Normal and Timed If th
43. followed by a question mark A set and query command which represents two separate commands a set command and a query command displays as the basic command name followed by a question mark in parentheses do not type the parentheses around the question mark when you enter a query command Here s an example of how each type of command appears in the table Command Name Command Type Example This is a set command There is no associated query command Example This is a query command There is no associated set command Example This is a set and query command Table 6 Host Command Quick Reference COMMUNICATION COMMANDS Serial Port SYSTem COMMunicate SERial BAUD Selects transmits and receives baud rate SYSTem COMMunicate SERial PACE Sets hosting communication low level data pacing method SYSTem COMMunicate SERial PARity Selects parity bit setting SYSTem COMMunicate SERial SBITs Selects number of stop bits used gt SYSTem COMMunicate SERial SERVice Selects state of service request marker feature 50 Computer Interface Table 6 Host Command Quick Reference Continued DISPLAY COMMANDS DISPlay CLEar Clears display text and enables live measurement data display Sets display text in the measurement display area ERROR COMMANDS Queries all error records in queue Clears all error records in queue Queries number of current error records in queue Queries next error record in qu
44. has been able to build state of the art calibration facilities containing the widest possible range of laser types and technologies This enables us to perform instrument and sensor calibration under virtually any combination of wavelength power and operating characteristics Sensors are calibrated against NIST traceable working standard sensors which are in turn calibrated against NIST calibrated golden standard sensors These working and golden standards are main tained with the utmost care recalibrated annually and verified even more regularly We maintain multiple NIST calibrated standards at many laser wavelengths to support the growing calibration needs of our customers Optical calibration is a core competency at Coherent and we strive to continually improve our methods precision and repeatability Additionally most of the calibrations are performed with highly automated systems thus reducing the possibility of human error to nearly zero Strict quality inspections during many stages of calibration and testing assure a precise and accurate instru ment that is NIST traceable and CE marked The benefit to our customers is that instruments calibrated by Coherent will consis 77 3sigma User Manual Limited Wananty Extended Lifetime Warranty tently perform as expected under their actual use conditions We are a registered ISO 9001 2000 company our products are NIST trace able and our calibration labs are fully ANSI Z540 co
45. he low level data pacing method for instrument to host communication XON represents the XON XOFF pacing method XON enables data flow while XOFF disables data flow Command SYSTem COMMunicate SERial PACE DEFaultIXONINONE Default is NONE Query SYSTem COMMunicate SERial PACE Reply XONINONE 54 Parity Stop Bits Service Request Display Commands Display Clear Computer Interface Selects the parity bit setting Choose the parity bit setting to match the parity bit setting of the remote control device Command SYSTem COMMunicate SERial PARity DEFaultIEVENIODDINONE Default is NONE Query SYSTem COMMunicate SERial PARity Reply EVENIODDINONE Selects the number of stop bits used Choose the number of stop bits to match the number of stop bits used on the remote control device Command SYSTem COMMunicate SERial SBITs DEFaultl112 Default is 1 Query SYSTem COMMunicate SERial SBITs Reply 112 Selects the state of the service request marker feature If the service request marker feature is on the service request marker ASCII ENQ or decimal 5 byte is sent by the instrument to indicate that data is available If the feature is disabled the host must poll for available data Command SYSTem COMMunicate SERial SERVice DEFaultIOFFION Default is ON Query SYSTem COMMunicate SERial SERVice Reply OFFION The host interface can set or query the measurement display area text in the center section of
46. hed this annunciator position is blank The Ready annunciator only applies when a thermopile sensor is attached and Joules mode is selected This combination of sensor and mode enables the instrument to mathematically integrate power to obtain total energy delivered to the sensor by a laser For this action to occur the laser must be pulsed When integration data is available the Ready annunciator displays Rdy While the power pulse is being integrated the Ready annunciator displays Int 26 Speedup Trigger Wavelength Range Selection Operation The Speedup annunciator only applies when a thermopile sensor is attached to the unit and Watts mode is selected SPD displays in the Speedup annunciator position whenever displayed measurement data is calculated using the speedup algorithm Otherwise the Speedup annunciator is blank The Trigger annunciator only applies when there is an attached pyro electric sensor When a trigger is detected TRG displays in the trigger annunciator position TRG displays in the absence of a trigger The wavelength of operation displays in the Wavelength annunci ator position as an integer value followed by wavelength units For example 940 nm displays if the wavelength is 940 nanometers Measurement range values are selected in decade steps This means that each value is either ten times more or ten times less than the previous value depending on whether you use the Up or Down Range button
47. hsize TIME Sets statistics batch size thermopile optical probes CONFigure STATistics MODE Enables or disables statistical data collection and reporting SI o CONFigure STATistics RESTartmode Selects action to be taken at end of a statistical batch SQ CONFigure STATistics START Terminates current statistical batch and starts a new one z 7 7 Recalls selected setup from nonvolatile memory Saves current setup to nonvolatile memory 71 Controls LCD backlight mode Sets auto power off timeout Queries system status a 7 W SI SI 53 3sigma User Manual Table 6 Host Command Quick Reference Continued TRIGGER COMMANDS COMMAND DESCRIPTION TRIGger LEVel Sets trigger level pyroelectric probes Communication Commands Serial Port Baud Rate Data Pacing Communications parameters may be changed remotely Any changes to the communications settings will take effect after the next RST command or power off power on cycle Serial port commands apply only when a serial port interface module is installed Selects the transmit and receive baud rates together Select the baud rate to match the baud rate of the remote control device Choose the highest baud rate at which reliable communications will continue Command SYSTem COMMunicate SERial BAUD DEFaultl960013840015 76001115200 Default is 9600 Query SYSTem COMMunicate SERial BAUD Reply 960013840015760011 15200 Selects t
48. ic sensor to take an average Average Power Power measurement With a Pyroelectric Sensor Connect a pyroelectric sensor to the 25 pin connector Note If your sensor has a BNC plug you will need to attach a 25 pin adapter Turn the Function Select switch to the W position conerenr sigma Press either the Up or Down RANGE button to manually select the range Note Auto selection is not available for this type of sensor Take the measurement and observe the result on the LCD Figure 1 Measuring Average Power With a Pyroelectric Sensor Quick Start Measuring Figure 2 describes how to take a power measurement using a Power With a thermal or optical sensor Thermopile or Optical Sensor Connect a thermal or optical sensor to the 25 pin connector Turn the Function Select switch to the W position coHEREnT Press either the Up or Down RANGE button to manually select the range or press the Auto button to let 3sigma select Block the beam and then press the ZERO the range for you button to set the baseline for your new measurement Unblock the beam take the measurement and observe the result on the LCD Figure 2 Measuring Power With a Thermopile or Optical Sensor 3sigma User Manual Measuring Figure 3 o
49. ical sensors Pyroelectric sensors are discussed below Pressing this button sets the current sensor input voltage as the zero baseline voltage To read the lower ranges correctly the instrument will generally need to be zeroed after power up A sudden change in the ambient temperature of the sensor may also require a re zeroing of the instrument When 3sigma is in Auto range and you press the Zero button the zero is measured and nulled for all the allowed ranges for the connected sensor When the instrument is not in Auto range only the currently selected range is zeroed Zeroing may take up to 30 seconds Normally the Zero button is pressed with the laser blocked from the connected sensor If a finite power level is present at the sensor the instrument will attempt to null it out A Bad zero warning appears if a given power input is too large to null on the more sensitive ranges 15 3sigma User Manual If the Bad zero warning appears Press the Dismiss soft button for more information refer to Soft Buttons on page 17 a Select a new range Press the Zero button again The following section concerns only pyroelectric sensors Thermo pile and optical sensors are discussed above This discussion only pertains to 3sigma instruments using firm ware V1 07 and later Pyro zeroing refers to dynamically correcting the baseline voltage of a pyroelectric sensor There are three instances when this correction takes pl
50. ing language such as BASIC C or LabVIEW Refer to the documen tation of a particular language for information on how to embed host commands into the code and how to establish RS 232 communica tions This section presents two examples of how to collect measurements The simplest measurement is composed of an instrument setup followed by a read command that will yield a single measurement data point Step Command Action 1 TRIG LEV 5 Trigger level 5 2 CONF READ SEND PRI Collect primary units only 3 CONF RANG SEL 3E 3 Use 3 mJ range 4 Setup is complete 5 INIT Issue the initiate command 6 Wait for the ENQ service request marker 7 ABOR Disable data collection 8 FETC NEXT Query for the next data record which will give something like 0 950E 00 81 3sigma User Manual Collecting Measurement Data Collecting Error Information The host meters collection of available measurement data by first querying for the number of records available and then fetching the indicated number of records For this example assume the instru ment setup performed through the host interface is identical to the example explained under A Simple Measurement on page 81 Step Command 1 2 INIT 3 4 ABOR 5 FETC NREC 6 FETC ALL Action Setup as above Issue the initiate command Wait for the ENQ service request marker Disable data collection Query for the number of data records to read and possibly allocate
51. l Tune mode button bars When the button name displays Zoom the zoom selection is 1X which is full scale for the current range Pressing the Zoom button steps to the next highest zoom selection as shown in Table 4 Table 4 Zoom Settings SETTING ZOOM SELECTION Setup Pressing the Zoom button while it is displaying 4X automatically cycles the setting back to Zoom 1X When a zoom setting changes the name of the soft button automat ically updates to reflect the new setting Most instrument system configuration activities are performed in Setup mode You can confirm or edit system values by navigating among different parameter topics and then selecting a topic by pressing the corresponding soft button During navigation the following information displays in the center display section as shown in Figure 27 Probe Resp 6 720E 00 V J 248 nm Probe Cal Date Oct 23 2001 Wavelength Corr 248 nm Off Attenuation Corr 3 000E0 Off Area Corr 4 000 sq cm On Host Interface RS232 9600 Figure 27 Setup Screen Example 42 Setup Screen Details Navigation Methodology Operation Probe Resp The first part of this field indicates the responsivity value of the attached sensor and is expressed in the following units pyroelectric sensors V J thermopile sensors V W and optical sensors A W The second part after displays the sensor calibration wavelength Probe Cal Date This value shows
52. le The host may control the expression of data ID tags that precede each data item in a batch record If Statistics mode is inactive the host may control the data contents and the expression of data ID tags that precede each data item in a data record For more information refer to Data Value Headers and Data Value Set Send on page 66 Selects if data delivery for thermopile or optical probes is presented in a continuous stream of sampled data points or simply the last data point sampled If Statistics mode is active the continuous data delivery mode has no effect Command CONFigure READings CONTinuous DEFaultILASTISTREam Default is LAST Query CONFigure READings CONTinuous Reply LASTISTREam 65 3sigma User Manual Data Value Headers Data Value SetSend Selects if data value identification strings will prefix data values reported over the host interface Headers are in the form of lt header gt lt value gt The lt header gt is literally one of the IDs used in the data value send command Command CONFigure READings HEADers DEFaultIONIOFF Default is OFF Query CONFigure READings HEADers Reply ONIOFF As an example if headers is ON a data record could look like PRI 1 449E 03 If headers is OFF a data record could look like 1 449E 03 Selects which values are sent when non statistical measurement data is reported over the host interface One or more of the selections in the list below may be
53. ll be terminated Syntax Commands are specified using standard SCPI notation syntax Refer to the SCPI specification for more information Briefly the short form of a word is specified in upper case and the alternate long form is specified as the entire word Character case is ignored A command must be sent in either long or short form but not a combi nation of both For example the initiate command is specified as INTTiate The long form is initiate and the short form is init Sending either form is valid in either upper case or lower case or mixed case Sending initia is not valid The command delimiters are from the set of delimiters lt space gt lt tab gt Table5 shows the Backus Naur Form BNF notation used to describe commands and queries in this section Table 5 Backus Naur Form BNF Notation SYMBOL MEANING 49 3sigma User Manual HostCommand This section gives a brief description of all 3sigma commands For detailed information about a specific command go to the page refer Quick enced in the right hand column of Table 6 below Reference There are two types of commands ser and query A set command changes an instrument setting or performs a specific action A query command causes the instrument to return data and information about its status In the following table A set command appears as the basic command name only A query command consists of the basic command name
54. ll error clear 57 Analog output source 62 91 Aperture area 61 Area correction enable 61 Attenuation correction enable 61 Attenuation factor 62 Auto power off 72 Auto range enable 68 Backlight 72 Batch size 69 Baud rate 54 Calibration date instrument 58 Calibration date probe 58 Continuous data delivery mode 65 Data pacing 54 Data value headers 66 Data value setsend 66 Display clear 55 Display text 56 Error count 57 Fetch all available records 60 Fetch available record count 61 Fetch missing data records count 60 Fetch next available record s 60 Function switch position 62 Head temperature 59 Identification 70 Initiate 60 Model 58 Parity 55 Pulses 63 Range value select 68 Recall 71 Reset 70 Responsivity 59 Restart anew batch 70 Restart mode 70 Save 71 Self test 71 Serial number instrument 58 Serial number probe 59 Service request 55 Single error 57 Speedup 62 Statistics mode enable 69 Stop bits 55 System status 73 Thermopile and optical probe zero 63 Time 63 Trigger level 73 Type 59 3sigma User Manual Wavelength 68 Wavelength correction enable 67 Communication commands 54 Display commands Display clear 55 Display text 56 Serial port 54 Baud rate 54 Data pacing 54 Parity 55 Service request 55 Stopbits 55 Computer interface special considerations 48 Connections Analog out 19 Power 18 Probe 19 RS 232 18 Continuous data delivery mode command 65 D Data aver
55. ltage of the analog out The difference between zero and the voltage at the analog out is the offset You can subtract this offset from all future readings Analog out represents watts not energy when 3sigma is in single pulse thermopile energy from a thermopile pulse mode System Information The System Information data entry screen is a display screen only It shows the firmware version number the type of interface and the serial number of the instrument Setting the Function Select switch to Off immediately shuts down the instrument To restore power after Auto Power has automatically turned instrument power off you must rotate the Function Select switch to the Off position and then back to the appropriate mode 46 Computer Interface COMPUTER INTERFACE This section explains the commands and queries that allow you to control and operate 3sigma via an RS 232 interface Topics discussed in this section include Special considerations page 48 Syntax page 49 Host comand quick reference page 50 Communication commands page 54 Display commands page 55 Error commands page 56 Instrument and probe device information commands page 58 Measurement data collection commands page 59 Measurement setup commands page 61 SCPI mandatory commands page 70 SCPI optional commands page 71 System option commands page 72 Trigger commands page 73 Output data format page 74 Before attempting to communica
56. mopile silicon sensor Hertz Mode Off 85 3sigma User Manual Table 12 Factory Default Settings Continued Serial Stop Bits Speedup Enable Stat Mode Off Trend Size 10 min or 10 000 pulsed Wavelength Correction Off 86 Appendix C Specifications APPENDIX C SPECIFICATIONS Table 13 lists 3sigma specifications Table 13 Specifications PARAMETER DESCRIPTION Analog Output 0 to 1 V output 150 to 300 ohms output impedance Battery Operating time with full charge 7 hrs approx Recharging time with fully discharged battery 10 hrs approx Calibration Accuracy 1 NIST traceable Dimensions Height 6 4 in 162 6 mm Width 8 0 in 203 2 mm Depth 2 0 in 50 8 mm Linearity 1 instrument Measurement Ranges sensor dependent Pyroelectric 3 uJ to 300 J Thermopile 3mW to3 kW Optical 300 nW to 30 mW Power 100 to 240 VAC 50 to 60 Hz AC wall adapter included and rechargeable NiMH battery Regulations Met CE ISO 9000 Resolution sensor dependent Pyroelectric Thermopile Optical RS 232 Pinouts 1 GND Receive from computer to 3sigma Transmit from 3sigma to computer 87 3sigma User Manual Table 13 Specifications Continued PARAMETER DESCRIPTION Analog Output 0 to 1 V output 150 to 300 ohms output impedance Weight approx 2 6 Ibs 1 2 kg RS 232 Pinouts Table 14 shows the 3sigma RS 232 pinouts Table 14 RS 232 Pinouts Receive from computer to 3sigma Tr
57. mpliant In addition to the technological advantage we also strive to deliver the best service in the industry with a knowledgeable and respon sive staff and rapid turnaround Coherent Inc the Company warrants its laser power and energy meters and sensors products Products to the original purchaser the Customer that the product is free from defects in materials and workmanship and complies with all specifications active at the time of purchase for a period of twelve 12 months Coherent Inc will at its option repair or replace any product or component found to be defective during the warranty period This warranty applies only to the original purchaser and is not transfer able Coherent Inc the Company offers original purchasers the Customer purchasing laser power and energy meters and sensors products Products an extended lifetime warranty program which includes all parts and labor In order to qualify for this watranty a Customer must return the Product to the Company for recalibration and recertification traceable to NIST and MIL STD 45662A within one year from the date of purchase and annually thereafter The Company will recertify the Product provide software upgrades and perform any needed repairs for a fixed service fee as established by the Company from time to time and in effect at the time of service If the Product fails and is returned to the Company
58. nel RS 232 This is an RS 232 female miniature 6 pin DIN For a list of pin Connection assignments refer to Table 14 on page 88 Table 15 on page 89 shows the wiring configuration between the mini DIN 6 in connector and a DB 9 connector An RS 232 male miniature 6 pin DIN to 9 pin female D sub adapter is available from Coherent PowerConnection Connect the supplied power cord to this jack The 3sigma requires a custom AC adapter which is shipped with the unit If the adapter is lost contact Coherent for a replacement Description Left Side Panel Sensor and analog out locations are shown in Figure 9 Sensor Connection Analog Out Connection HAAA RARA Figure 9 Left Side Panel Sensor Use this connection to attach a DB 25 smart sensor Connection If your sensor has a BNC plug you will need to attach a 25 pin adapter available from Coherent Analog Out The Analog Out connection can be used to connect to another Connection device like an oscilloscope or an analog display This connection requires a cable with a SMB connector available from Coherent 19 3sigma User Manual 20 Display Data Invalid Data Stale Data Operation OPERATION This section discusses the following topics Display data this page Annunciators page 24 Range selection page 27 Baseline clip BCLIP page 28 Error displays page 28
59. nt instrument panel as shown in Table 16 Operational Modes ZERO OM OOD CO sigma _ coHERENT Figure 16 Operational Mode Settings Select the operational mode of the instrument by turning the Func tion Select switch When a mode is exited and then later reentered the button bar and all functional mode parameters discussed next relevant to that button bar are restored Functional mode is a setting within an operational mode Depending on which soft button is pressed selected the instrument will be in one of the following functional modes g No buttons pressed normal functional mode Avg button pressed average functional mode Stat button pressed statistics functional mode The user can set many of the activities available within these func tional modes The following sections describe all functional modes organized under the appropriate operational mode 33 3sigma User Manual Joules Energy joules measurements may be taken using pyroelectric sensors for pulsed lasers or thermopile sensors for long pulsed lasers Measurement data always displays in the Main Display section Joule measurements are not available with an optical sensor Table 2 lists the functional mode menus available in Joules mode Table 2 Functional Mode Menus Joules Mode FUNCTIONAL MODE THERMOPILE SENSOR PYROELECTRIC SENSOR Statistical Auto
60. obe connection 19 M Measurement Data collection commands 59 Data gating 59 Abort command 59 Initiate command 60 Data query 60 Fetch available record count 61 Fetch missing data records count 60 Fetch next available record s 60 Setup commands 61 Area correction 61 Aperture area 61 Area correction enable 61 Attenuation 61 Analog output source 62 Attenuation correction enable 61 Attenuation factor 62 Function switch position 62 Speedup 62 Thermopile and optical probe zero 63 Display data averaging 63 Pulses 63 Time 63 Measurement data format 64 Continuous data delivery mode 65 Data value headers 66 Data value set send 66 Probe wavelength correction 67 Wavelength 68 Wavelength correction enable 67 Range control 68 Auto range enable 68 Range value select 68 Statistical batch control 69 Batch size 69 Restart anew batch 70 Restart mode 70 Statistics mode enable 69 Model command 58 N Not available data 22 O Output data format 74 General data formats 74 Headers 74 Ordering 74 Units 74 P Parity command 55 Percent unit 23 Power connection 18 Probe Compatibility 12 Connection 19 Status annunciator 25 Wavelength correction commands 67 Product shipping instructions 80 93 Index Publication updates ix Pulse sampling annunciator 26 Pulses command 63 Q Quick Reference host command 50 Start 5 Pyroelectric probe average power measurement 6 R Range Annunciator 26 Buttons 17 Control commands 68 Err
61. ommands have an identical corresponding host command Sets the aperture area expressed in square centimeters cm2 Command CONFigure AREA APERture lt float of form m mmmE ee gt Default is not applicable Query CONFigure AREA APERture Reply float of form m mmmE ee Enables or disables area correction Command CONFigure AREA CORRection DEFaultIONIOFF Default is OFF Query CONFigure AREA CORRection Reply ONIOFF Enables or disables attenuation correction Command CONFigure ATTEnuation CORRection DEFaultIOFFION Default is OFF Query CONFigure ATTEnuation CORRection Reply OFFION 61 3sigma User Manual Attenuation Factor Analog Output Source Function Switch Position Speedup Sets the attenuation factor for the currently connected probe The attenuation factor has no units It must be greater than or equal to 1 0 otherwise an error will result Command CONFigure ATTEnuation FACTor DEFaultl lt float of form m mmmE ee gt Default 1 000E00 Query CONFigure ATTEnuation FACTor Reply lt float of form m mmmE ee gt Selects the voltage source of the analog output connector This command has no apparent effect when a thermopile or optical probe is attached Command CONFigure ANAlog SOURce DEFaultILIVEISAMPled Default is SAMP Query CONFigure ANAlog SOURce Reply LIVEISAMP Queries for the position of the function switch Command none Query CONFigure FUNC
62. on when the desired contrast level is found Firmware V1 07 and later Pressing and holding the Display Control button for more than second incrementally adjusts the LCD display contrast until it reaches either the minimum or the maximum contrast intensity At that point contrast begins adjusting towards the other extreme Example refer to Figure 7 Assuming that minimum lightest contrast intensity 1 and maximum darkest contrast intensity 10 the sequence of contrast changes is 1 2 3 4 5 6 7 8 9 10 9 8 7 6 5 4 3 2 1 2 3 4 5 lt 1 cycle approx 20 sec Figure 7 LCD Display Contrast Adjustment Function Select Switch Zero Button Description Whenever 3sigma powers up and the Display Control button is initially pressed and held contrast adjusts towards the minimum lightest contrast level Also whenever 3sigma first powers up contrast intensity is automatically set to the last contrast level previously used Turning this five position rotary switch allows selection of the following operational modes Setup used to set most instrument parameters and confirm or edit system values Tune provides an active view of measurement data s Watts measures power Joules measures energy e Off shuts down the instrument Refer to Instrument Modes on page 33 for detailed informa tion about each operational mode The following section concerns only thermopile and opt
63. ors 28 Selection 27 Range value select command 68 Ready annunciator 26 Recallcommand 71 Reset command 70 Responsivity Probe 59 Unit 23 Responsivity command 59 Restart anew batch command 70 Restart mode command 70 Right side panel 18 Power connection 18 RS 232 connection 18 RS 232 connection 18 S Save command 71 SCPI Mandatory commands 70 Identification 70 Reset 70 Self test 71 Optional commands 71 Recall 71 Save 71 SCPI identification command 70 SCPI recall command 71 SCPI reset command 70 SCPI save command 71 SCPI self test command 71 Self test command 71 Serial number instrument 58 Serial number probe 59 Service request command 55 Single errorcommand 57 Soft buttons 17 Special considerations 48 Data terminators 48 3sigma User Manual Data received by the instrument 48 Data sent by the instrument 48 Using an RS 232 interface 48 Data pacing 48 Kill output request 49 Service request 48 Specifications 87 Speedup annunciator 27 Speedup command 62 Stale data 21 Statistical batch control commands 69 Statistics mode enable command 69 Stop bits command 55 Syntax 49 System option commands 72 Auto power off 72 Backlight 72 System status 73 System status command 73 T Thermopile and optical probe zero command 63 94 Time command 63 Trigger Annunciator 27 Trigger levelcommand 73 Trigger levelcommand 73 Troubleshooting 75 Type command 59 U Unexpected errors 29 W Watts unit 23 Wavelength
64. ositive voltage that compensates for the negative voltage produced over the full scale operating range of the sensor A BCLIP error may indicate that 3sigma is not able to apply enough compensation under the current operating conditions That is the average power applied to the sensor is too high or there is a technical problem with the 3sigma Average power is computed as irradiance times frequency Example 1 J at 1 Hz 1 W average power Reducing the irradiance or the frequency of the laser can reduce average power The following factors may cause a BCLIP error to display Using a 3sigma that has a November 2001 or earlier calibration date Contact Coherent to arrange for a recalibration of your 3sigma Using a JSA sensor adapter with a defective input path Contact Coherent to arrange repair of your JSA sensor adapter Using an active sensor that has an incorrect value of DC offset stored in its EEPROM Contact Coherent for assistance Using a 3sigma unit that has a bad or corrupt calibration table which in turn causes the unit to incorrectly configure its offset control circuitry Contact Coherent for assistance For more information refer to Zero Button on page 15 Errors are classified as either range typical or unexpected These errors are discussed in the following paragraphs It is normal to put the instrument in an overrange baseline clip or sensor saturation condition while searching for the bes
65. ping Instructions below Table 11 Coherent Service Centers LOCATION PHONE E MAIL Product Shipping Instructions To prepare the product for shipping to Coherent Contact Coherent Customer Service refer to Table 11 for a Return Material Authorization number 2 Attach a tag to the product that includes the name and address of the owner the person to contact the serial number and the RMA number you received from Coherent Customer Service 3 Wrap the product with polyethylene sheeting or equivalent material 4 Ifthe original packing material and carton are not available obtain a corrugated cardboard shipping carton with inside dimensions that are at least 6 in 15 cm taller wider and deeper than the product The shipping carton must be constructed of cardboard with a minimum of 375 lb 170 kg test strength Cushion the instrument in the shipping carton with packing material or urethane foam on all sides between the carton and the product Allow 3 in 7 5 cm on all sides top and bottom 5 Seat the shipping carton with shipping tape or an industrial stapler 6 Ship the product to Coherent Inc 7470 SW Bridgeport Rd Portland OR 97224 Attn RMA add the RMA number you received from Coherent Customer Service 80 Appendix A Programming Examples APPENDIX A PROGRAMMING EXAMPLES Measurement Operation A Simple Measurement The following examples can be utilized in a high level programm
66. rlocks defeated is always at the operator s risk Table of Contents TABLE OF CONTENTS PEA o een ix U S Export Control Laws Compliance une lee ee ix Product and Publication Updates an asussueitensnstennnne sine IH nt ix Symbols Used in This Document une Die x Say 1 O ame ee ae 1 Other Safety Wa MIOS unid incisi n 1 Declaration of Conformity A A E A ts aa 3 A O ie eevee OUR 5 Measuring Average Power With a Pyroelectric Sensor 0 ceeceeceeesceesseceseeeseeceaecnseeeseeeenees 6 Measuring Power With a Thermopile or Optical SenSOT ooooconnnocccnonccconcncnnonccnnnncconanccnnnncnnns 7 Measuring Energy With a Pyroelectric Sensor 222200220000ssnsenssnonssnnennsnnennnnnnsnnnnnns nennen 8 Measuring Energy With a Thermopile Sensor u 22200022000022s0nssnsennsnnennnnnennnnnennnn nennen 9 Description naeh 11 Sensor Compatibilidad Ru 12 O 13 Display unseres else l u 13 Display Control Button a ass nen 14 H netiom Select Wicca 15 Zero Button caes o dai 15 Auto DUO tai 17 Range BUON aa ara dis 17 Soft Buttons u ak et ee een ai 17 Rich Side Panel a HE E A O 18 RS 232 C nnecU ON a 18 Power COMMECIION pics 18 Left Side Panels ia u Ba 19 Sensor COME Mido 19 Analog Qut Conneelion seras dica atsuak use 19 Operation areas en et ale 21 Display Data E A E ek s 21 Invand Dalai steilen 21 Stale Data beatae lt 21 Not Ayalable Data su aa nes 22 A O 22 a O AR 22 Dale ae else seele 22 A eh khaki
67. s when damage to equipment is evident In this case the current data entry screen is automatically aborted and an error popup window and error button bar appear The following are unexpected error messages e Bad zero Zero on a selected range is unsuccessful the offset 1s too large to be nulled Re zero in a more stable environment or select a different range 29 3sigma User Manual Damage temperature exceeded The sensor has overheated Increase cooling or discontinue use If the Damage temperature exceeded error is not corrected continued sensor operation may cause permanent damage Initialization failed Fatal error Return the instrument to Coherent Invalid switch setting The switch is stuck between two posi tions Rotate the switch until it locks into position If that is unsuccessful return the instrument to Coherent NVRAM communication failure A failure has occurred while trying to read the internal EEPROM Return the instrument to Coherent Probe checksum error The sensor internal EEPROM checksum check has failed causing the instrument to give readings which are nominally close but not calibrated Contact Coherent for assistance Probe communication failure This may be due to a sensor and or instrument failure or possibly a sensor connector seating problem Disconnect and then reconnect the sensor If the problem persists return the instrument to Coherent Probe firmware v
68. selected bd Primary data value includes watts or joules specify tag PRI e Pulse rate in hertz if a pyroelectric probe is attached specify tag HZ Pulse period in tenths of microseconds if a pyroelectric probe is attached specify tag PER Flags specify tag FLAG The IDs may be specified in any order however the presentation of the data is in PRI HZ PER then FLAG order depending on which IDs were selected At least one ID must be selected Note that this command only affects data records sent when Statistics mode is inactive When Statistics mode is active the presentation of batch data is not configurable and is in AVG mean DEV standard devi ation MIN minimum then MAX maximum order Command CONFigure READings SEND PRI HZ PER FLAG Default is PRI Query CONFigure READings SEND Reply PRI HZ PER FLAG 66 Computer Interface The FLAG data item may be used so that accompanying qualifica tion information is reported with each data record Qualification information includes overrange and underrange conditions The flag word is reported in ASCH form of a 32 bit hexadecimal number Each bit has a qualification meaning as described in Table 8 Table 8 Data Value Set Send Bit Qualification Meaning QUALIFICATION DATA ERROR 14 00004000 Minimum baseline BCLIP error Unspecified bits are reserved As an example indicating to send PRI and FLAG the host interface could send the following data r
69. sigma instrument to select the best measurement range for the incoming signal In Auto mode the instrument automatically switches to either a lower range if available when the power drops below 8 of the full scale range or a higher range if available when the instrument overranges The Up and Down Range buttons manually select the measurement range Range Up selects the next higher full scale range but only if the new range is valid for the attached sensor a Range Down selects the next lower full scale range but only if the new range is valid for the attached sensor The operation currently being performed by the instrument defines the function of each of the five soft buttons These definitions display as text in the button bar directly above the buttons Text color and background color show if a particular function is available to the user normal video black lettering on a white background means that a button function is available Reverse video white text on a dark background indicates the function is currently selected 17 3sigma User Manual Right Side Panel Figure 8 shows the RS 232 and power connections on the 3sigma right side panel AS ul Bo Connection O Power Connection RS 232 12VDC Q 1 25A Oe O POWER Figure 8 Right Side Pa
70. ssessssecececccecsesessceceecesesensnssaeeeseeeens 60 Fetch Available Record Contra He 61 Measurement Setup COMME OS 61 Area C rrect on merren sclaak E a Ea E A EE EEES 61 IPErEUrE A E ON ead a 61 Area Correction Enable vinil kn hl ih 61 PPE MUA ON ee ae O E REID 61 3sigma User Manual Attenuation Correction Enable ondaa 61 Attenuation Eco ita 62 Analog Qufput Souree resorni i o se 62 P nection Switch POSTE On a aia 62 Speedupr nnnsunnkeke Hal E aaa be 62 Thermopile and Optical Probe Zero 22u0220000ssnsesnsnnesnnnnensnnennnnnennn nen 63 Display Data Averaging voii aire 63 PULSES A EER 63 Timer een 63 Measurement Data Pommala cs ee 64 Continuous Data Delivery Mode gsuuueitsunheknesinnehenten tes 65 Data Value Header usina tido si 66 Data Valle ESO ni tos a ae 66 Probe Wavelength Correction a dai 67 Wavelength Correction Enable it 2 67 WAV CIE TOU one 68 Range Control u a Reini 68 Auto Range Enables arena 68 Range Value Select ini il ie IR a Ustaceastivads 68 Statistical Batch Control ee a 69 Batch Be ernsten 69 States Mode Prablei sa a een 69 Restan Modernes esse 70 Restart a New Batch ai Eiskslebsssihlakeisee 70 SCPI Mandatory Command Sesostris t r ee eiaei aietan 70 Identification ensure 70 RES ssc acs E E A E E A N meee Le 70 S TE EE EEEE N le 71 SCPI Optional CommandSissieissisn iaa n a i aatis 71 O 71 IU ais 71 System Option Commands ao a seen A A vee ce 72 O 12 Auto FOWEROR a
71. starts the auto power off timer To restore power after Auto Power has automatically turned instrument power off you must turn the Function Select switch to the OFF position and then back to the appropriate mode Command SYSTem OPTion POWer AUTOoff DEFaultlOFFI10 60 Default is 10 Query SYSTem OPTion POWer AUTOoff Reply OFFI10 60 72 System Status Computer Interface Queries the system status Status is returned in a string expressed in hexadecimal integer form The 32 status word is a bit mapped status indicator If a bit is set the associated status is active otherwise it is inactive Table 9 describes the status bit mapping Table 9 Status Bit Mapping 00000001 Battery is low if the bit is set 1 00000002 Probe damage temperature is exceeded Unspecified bits are reserved Tigger Commands Tigger Level Command None Query SYSTem STATus Reply hexadecimal integer Example If the battery is low and the probe damage temperature has been exceeded the query returns 00000003 Battery is low and probe damage temperature is exceeded Sets the trigger level expressed as a percentage of full scale capa bility for pyroelectric probes Thermopile and optical probe trigger levels are fixed Command TRIGger LEVel DEFaultl2 20 Default is 10 Query TRIGger LEVel Reply 2 20 73 3sigma User Manual Output Data Format General Data Formats Units Headers Ordering Output data
72. storage to hold the data that will be queried later Query for all data records Go to step 3 to wait for more data records or go to step 7 to quit The host meters collection error information in the same way it meters collection of available measurement data Step Command 1 3 SYST ERR COUNT 4 SYST ERR ALL 82 Action ENQ service request marker is received FETC NREC Query reveals there are no data records available so there must be error records to read Query for the number of error records to read and possibly allocate storage to hold the records that will be queried later Query for all error records Parse decode the error records Appendix A Programming Examples The error collection handling commands should be integrated into the host s normal operational code so that error information can be constantly collected 83 3sigma User Manual 84 Appendix B Default Settings APPENDIX B DEFAULT SETTINGS Default settings are set at the Factory You can restore the default settings at any time by going to the Setup Recall screen and selecting Factory default Table 12 Factory Default Settings SETTING DEFAULT Area Correction Off Area Value Attenuation Correction Attenuation Value Auto Batch Auto Power Mode Auto Power Timeout Auto Range Avg Mode Avg Window Size pyroelectric sensor Avg Window Size thermopile silicon sensor Batch Size pyroelectric sensor Batch Size ther
73. surement values consumed by the instrument in one Tune mode display refresh cycle The Max line shown as a dashed line on the display reflects the peak value of the pulses received and that is why on 39 3sigma User Manual occasion the trace line may be some distance from the Max line When the trace arrives at the right edge of the Tune chart the trace is cleared and a new trace starts at the left edge A numeric scale having four reference points is on the outside of the left edge of the chart see Figure 25 A maximum level dashed line appears above the maximum value measured since the Tune mode was either started or cleared The live and maximum measurement values are displayed in the annunciator bar If the attached sensor is a pyroelectric sensor the trace will not proceed unless there is trig gering 3 00 2 00 1 00 0 00 Figure 25 Tune Display Example Pressing the Zoom button advances to the next zoom selection with the chart appropriately scaled see Zoom Selections on page 42 for more information Pressing the Freeze button toggles the freeze state of the Tune chart When the chart is frozen the Freeze button definition text displays in reverse video Freezing the chart causes the trace to stop although chart data collection continues in the background Unfreezing the chart causes the chart to instantly jump ahead to its most current representation of measurement
74. t in Setup mode see Setup on page 42 Otherwise the batch count must be manually restarted 37 3sigma User Manual Avg You may apply data smoothing by configuring the instrument on the Setup screen Avg gt Setup Data smoothing reduces the rapid changing of the measurements on the screen as each new data value updates the measurement values Window size is available from 2 to 999 pulses for a pyroelectric sensor or 2 to 999 seconds for a ther mopile or optical sensor Hz Use this mode to display frequency Setup This mode allows you to set up the appropriate statistical batch size for taking a watts reading Batch size has a range of 2 to 99 999 pulses for a pyroelectric sensor or 2 to 9 999 seconds for a ther mopile or optical sensor Speed up thermopile sensor only This mode is used to obtain quicker measurement data as the sensor initially heats up For more informa tion about this functional mode refer to Setup Topics on page 44 Start Use this mode to manually start the batch count according to the batch size previously determined in Setup mode discussed under Setup on page 42 Stat The statistics Watts mode display shows a series of four digit fixed point values with the appropriate units always in some form of watts Statistical data for a pyroelectric sensor is generated on a pulse by pulse basis Statistical data for thermopile or optical sensors is generated over
75. t measure ment range When the instrument detects an overrange condition measurement values are replaced by the letters OVR When the instrument detects a baseline clip condition measurement values are 28 Typical Errors Unexpected Errors Operation replaced by the letters BCLIP When the instrument detects a sensor saturation condition measurement values are replaced by the letters PSAT The Tune mode graphical display is undefined when a range error occurs However the numeric display values in the annunciator bar display the error when a range error occurs For more information about Tune display refer to Tune Display on page 39 Text indicating typical errors displays in the center display section In data entry screens the error is suppressed until the data entry screen is completed The following are typical error messages No Probe A valid sensor has not been detected Not available The requested function is not available You can dismiss the error by correcting the condition that caused the error Unexpected errors display in a new window that covers the entire center display section as shown in Figure 14 Dismiss Figure 14 Error Window You can dismiss the error window by pressing the Dismiss button Upon error dismissal the display is restored to its previous state In data entry screens errors are suppressed until the data entry screen is completed An exception to this i
76. te with the 3sigma via the RS 232 interface verify that all host communication settings match the 3sigma settings RS 232 baud rate parity etc Normally flow control is not used however Xon and Xoff may be used as an option Data width is 8 bits 47 3sigma User Manual Special Considerations Data Teminators Data Received by the Instrument Data Sentby the Instrument Using an RS 232 Interface Data Pacing Service Request All data passing through the host interface must be properly termi nated This is especially important when using the RS 232 host interface because there is no low level signaling mechanism to indi cate the end of a data transmission Data received by the instrument must be terminated by a carriage return decimal 13 byte A line feed decimal 10 byte following the carriage return is ignored so strings can be terminated with a carriage return and line feed pair A command or query is considered incomplete without the terminator All data sent by the instrument is terminated by a carriage return decimal 13 byte and line feed decimal 10 byte pair The host can control the pace of data from the instrument using the popular XON XOFF method for serial communication software flow control The host can stop the instrument from sending data by sending ASCH XOFF decimal 17 byte The host can enable the instrument to send data by sending ASCII XON decimal 19 byte Sending XOFF while disable
77. ted incremented value could result in a final value that is out of range the increment is prevented 6 If the decremented digit rolls over from 0 to 9 the next most significant digit is also decremented by one When the next most significant digit rolls over from 0 to 9 the same rollover rules cascade to the next most significant digit and so forth If the expected decremented value could result in a final value that is out of range the decrement is prevented Rollover rules extend to the exponent when editing a scientific notation value base component The soft button farthest to the right is usually defined as the Enter button When a selection requires multiple button presses the Enter button is generally used to commit a selection For example a data entry screen requires the user to increment or decrement digits of a number By pressing the Enter button you commit the currently displayed number to use All data entry screens include a Cancel field If the Cancel field is selected when the Enter button is pressed the data entry is aborted the data entry screen goes away and no changes take effect 32 Operation Instrument This section discusses the operational and functional instrument Modes modes available with 3sigma Let s start by defining those terms Operational mode refers to the Setup Tune W atts J oul es and Off instrument settings These settings appear next to the Function Select switch on the fro
78. tes the measurement values Window size is available from 2 to 999 pulses for a pyroelectric sensor or 2 to 999 seconds for a thermopile sensor Hz pyroelectric sensor only Use this mode to display frequency Setup This mode allows you to set up the appropriate statistical batch size for taking a joules reading Batch size has a range of 2 to 99 999 pulses for a pyroelectric sensor or 2 to 9 999 seconds for a ther mopile sensor 35 3sigma User Manual Start Use this mode to manually start the batch count according to the batch size previously determined in Setup mode see Setup on page 42 Stat The Statistics Joules mode display refer to Figure 20 shows a series of four digit fixed point values with the appropriate unit always in some form of joules Statistical data for a pyroelectric sensor is generated on a pulse by pulse basis while statistical data for a thermopile sensor is generated over time Each quantity is labeled above the values with Mean Std Dev standard deviation Min minimum and Max maximum The current batch count expressed without units is always displayed in slightly smaller text at the bottom center of the center display section Mean Std Dev 032 4 uJ 003 7 uJ Min Max 025 3 uJ 045 0 uJ Count 100 Figure 20 Joules Mode Statistics Display With Pyroelectric Sensors Example MeasurementDisplay Screens Trig pyroelectric sensor only The trigger lev
79. the display Note that the literal text in the measurement data display area is referenced and this may not neces sarily represent valid measurement data Clears the display text and enables measurement data to be displayed live Command DISPlay CLEar Query none 55 3sigma User Manual Display Text Enor Commands Sets the display text in the measurement display area the center section of the display When text is displayed through the host inter face it remains until it is cleared from the front panel changed again from the host interface or a display clear DISP CLE is sent The amount of text that can be displayed is limited to the space required to fit one line across the center section of the display about 30 char acters The string is centered in the display Oversized strings are left and right truncated All text within the quoted string is displayed Command DISPlay TEXT lt quoted display text gt Query none Programming errors occasionally occur while testing or debugging remote programs and less often during measurement Errors are returned in ASCII string form Error strings follow the SCPI stan dard for error record definition lt error code gt lt quoted error string gt lt CR gt lt LF gt The host must query for errors in two steps First query for the number of error records available N Second query N times for the error records Errors are stacked up to 20 deep With error overflo
80. the sensor calibration date Wavelength Corr The first part indicates the value you entered for wavelength of oper ation The second part of this field after indicates if the wave length correction for this wavelength is enabled The valid selections for the second part are On and Off Attenuation Corr The first part of this field indicates the value you entered for attenu ation The second part after shows if attenuation correction is enabled The valid selections for the second part are On and Off Area Corr The first part indicates the value you entered for beam area The second part after the shows if area correction is enabled The valid selections for the second part are On and Off Host Interface This field indicates the type of host interface installed in the instru ment and the current baud rate Setup topics are arranged in a list Items in the list are accessible by paging through the list visible in the bottom display section The topics are distributed among multiple pages with up to four topics per page Paging is accomplished by pressing the lt more gt soft button always the last soft button on the right When you are on the last page pressing the lt more gt soft button causes wrapping back to the first page of topics Press the appropriate soft button to select the topic to edit From there the normal data entry screen is presented 43 3sigma User Manual Setup Topics Pressing a Setup
81. time Each quantity is tagged above the values with Mean Std Dev standard deviation appears only when using a pyroelectric sensor Min minimum and Max 38 Operation maximum The current batch count expressed with no units is always displayed in slightly smaller text at the bottom center of the center display section as shown in Figure 23 Mean Std Dev 35 14 mW 65 13 mW Min Max 03 87 mW 533 1 mW Count 100 Figure 23 Watts Mode Statistics Display With Pyroelectric Sensors Example When a thermopile or optical sensor is installed the count is expressed in seconds as shown in Figure 24 Mean 007 3 mW Min Max 007 1 mW 007 5 mW Count 9999s Figure 24 Watts Mode Statistics Display With Thermopile or Optical Sensors Example Tune Tune Display Trig pyroelectric sensor only The trigger level is the percentage of the full scale value of the current range at which a trigger is detected Trigger level can be set from 2 to 20 percent Tune mode charts provide an active view of measurement data Measurement units are either joules when a pyroelectric sensor is attached or watts when a thermopile or optical sensor is attached The Tune display resembles an oscilloscope trace As the trace progresses from left to right each new trace is added to it The chart display is refreshed at the Tune mode display refresh rate of 9 Hz Each trace point is composed of the average of all the mea
82. tion Reply JIWITUNEISETUP Selects the speedup mode Command CONFigure SPEEDup DEFaultIOFFIFULLIPARTial Default is PARTial Query CONFigure SPEEDup Reply OFFIFULLIPART 62 Thermopile and Optical Probe Zero Display Data Averaging Pulses Time Computer Interface thermopile and optical probes only Sets the current probe input voltage as the zero baseline voltage The completion of this command can take up to 30 seconds If auto ranging is active the probe is zeroed for all usable ranges otherwise the probe is zeroed for the current range Command CONFigure ZERO Query CONFigure ZERO Reply BUSYIREADYIERROR BUSY indicates a zero procedure is in process READY indicates the last zero procedure if any was successful ERROR indicates the last zero procedure if any failed Depending on the type of probe attached the data averaging window is expressed differently Data Averaging cannot be enabled if Statistics is enabled Sets the data averaging window size expressed in number of pulses The data averaging feature applies a moving average algorithm to the measurement data This command only applies when a pyroelec tric probe is attached Command CONFigure AVErage PULSe DEFaultIOFFI2 999 Default is OFF Query CONFigure AVErage PULSe Reply OFFI2 999 Sets the data averaging window size expressed in seconds The data averaging feature applies a moving average algorithm to the m
83. tric sensor The function mode changes and no pulse triggers are detected with a pyroelectric sensor E Statistics mode is entered and batch data is not compiled a The instrument is in Joules mode and no pulse measurements have been taken with a thermopile sensor Not available data displays as a string of five dashes Measurement and display values are displayed using one of the following specific formats Area is expressed in cm centimeters squared The calendar date displays in month three letters day two digits year four digits format Example Oct 23 1948 Frequency is expressed in Hz hertz Joules are expressed in fJ femtojoules s pJ picojoules nJ nanojoules mJ microjoules s mJ millijoules J joules KJ kilojoules MJ megajoules 22 Percent Responsivity Wavelength Operation GJ gigajoules TJ terajoules When area correction is enabled all units are expressed in terms of joules per cm In other words the cm suffix is always appended to the joules units Percent units are expressed using the sign following a one two or three digit percentage value Responsivity is expressed in V J volts per joule for pyroelectric sensors V W volts per watt for thermopile sensors A W amperes per watt for optical sensors Watts are expressed in fW femtowatts pW picowatts nW nanowatts mW microwatts
84. trument setup to the indicated setup location in nonvolatile memory Up to five instrument setups can be saved in nonvolatile memory for later recall Command SAV 112131415 Query None 71 3sigma User Manual System Option Commands Backlight Auto Power Off The system option commands control functionality that is exclusive of instrument measurement functions These commands can be sent at any time without affecting a measurement in progress Controls the Backlight mode of the LCD Battery charge is conserved when the backlight is off The instrument can be config ured to automatically turn off the backlight after a specific period of front panel inactivity Selecting timed mode enables the backlight timer to automatically turn off the backlight when the backlight timer expires Timed mode is selected by specifying a timeout value in minutes Any button press or function switch change automati cally restarts the backlight timer if the selected mode is timed Command SYSTem OPTion BACKlight DEFaultINORMall1 20 Default is NORMal Query SYSTem OPTion BACKlight Reply NORMI1 20 Sets the auto power off timeout expressed in minutes Battery charge is conserved when this feature is active The instrument can be configured to automatically power off after a specified period of front panel inactivity Setting the timeout to OFF disables the auto power off function Any button press or function switch change automatically re
85. utlines how to set up a pyroelectric sensor to take an Energy With a energy measurement Pyroelec tric Sensor Connect a pyroelectric sensor to the 25 pin connector Note If your sensor has a BNC plug you will need to attach a 25 pin adapter O Turn the Function Select switch to the J position 00000 CoHeRENT Press either the Up or Down RANGE button to manually select the range Note Auto selection is not available for this type of sensor Take the measurement and observe the result on the LCD Figure 3 Measuring Energy With a Pyroelectric Sensor Quick Start Measuring Figure 4 explains how to take an energy measurement using a Energy With a thermal sensor Thermopile Sensor Connect a thermopile sensor to the 25 pin connector Turn the Function Select switch to the W position and then find the appropriate W range by taking a couple of sample measurements The appropriate range is the lowest range available that does not give an overrange error during the test measurement coerent Block the beam and then press the ZERO button to set the baseline for your new measurement Turn the Function Select switch to the J position The RANGE buttons ZERO button and AUTO RANGE function should not be used during this type of measurement If
86. w the last error in the error list is an indication of error overflow An error overflow usually indicates that a previous error has cascaded thereby causing other errors which you can ignore Error record queries are destructive reads As each error record is read by the host the error count automatically decrements by one Possible errors include Error queue full Invalid parameter Not implemented Password required System error Unknown error Unrecognized command If no errors have occurred an error query will return a response of 0 No errors 56 All Enor All Enor Clear Error Count Single Error Computer Interface Queries for all error records in the error queue at the time of the query Command none Query SYSTem ERRor ALL Reply lt all available error record s gt Clears all error records in the error queue Command SYSTem ERRor CLEar Query none Queries for the number of error records in the error queue at the time of the query Command none Query SYSTem ERRor COUNT Reply lt count of error records stored gt Queries for the next error record in the error queue More than one error record may be queried using the optional lt error record count gt parameter Command none Query SYSTem ERRor NEXT lt error record count gt Default for lt error count gt is 1 Reply lt next available error record s gt 57 3sigma User Manual Instrument and
87. website www coherent com You can obtain additional support by either telephoning our Technical Support Hotline at 1 800 343 4912 or e mailing our Support Team at support instruments coherent com Telephone coverage is available Monday through Friday except U S holidays If you call outside our office hours your call will be taken by our answering system and will be returned when the office reopens If there are technical difficulties with your product that cannot be resolved by support mechanisms outlined above please e mail or telephone Coherent Technical Support with a description of the problem and the corrective steps attempted When communicating with our Technical Support Department via the web or telephone the model and serial number of the product will be required by the Support Engineer responding to your request Outside the U S If you are located outside the U S visit our website for technical assistance or telephone our local Service Representative Representative phone numbers and addresses can be found on the Coherent website www coherent com Coherent provides web and telephone technical assistance as a service to its customers and assumes no liability thereby for any injury or damage that may occur contemporaneous with such services These support services do not under any circumstances affect the terms of any warranty agreement between Coherent and the buyer Operating a Coherent product with any of its inte
88. within one year following the date of recalibration service the Company will at its option repair or replace the Product or any component found to be defective This warranty applies only to the original purchaser and is not transferable If the Product is not returned for recalibration or service prior to the one year anniversary the lifetime warranty program expires The lifetime warranty program may be reinstated at Coherent s option after completion of a fee based product evaluation and repair and subsequent recalibration and recertification service 78 Wananty Limitations Obtaining Service Calibration and Warranty The foregoing warranties shall not apply and Coherent reserves the right to refuse warranty service should malfunction or failure result from Damage caused by improper installation handling or use Laser damage including sensor elements damaged beyond repair Failure to follow recommended maintenance procedures Unauthorized product modification or repair Operation outside the environmental specifications of the product Coherent assumes no liability for Customer supplied material returned with Products for warranty service or recalibration THIS WARRANTY IS EXCLUSIVE IN LIEU OF ALL OTHER WARRANTIES WHETHER WRITTEN ORAL OR IMPLIED COHERENT SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE IN NO EVENT SHALL THE COMPANY BE LIA
89. y Product Family Standard for Measurement Control and Laboratory Equipment to include the following test specifications as of July 2001 ENSS011 Class A Radiated Emissions EN55011 Class A Conducted Emissions EN61000 4 2 Electrostatic Discharge Performance Criteria B Un may respond to an ESO event but wil etum to normal without user intervention EN61000 4 3 Radiated Immunity Performance Criteria A EN61000 4 4 Electrical Fast Transient Immunity Performance Criteria A EN61000 4 5 Electrical Slow Transient Immunity Performance Criteria A EN61000 4 6 Conducted RF Immunity Performance Criteria A EN61000 4 11 Power Line Dropout Performance Criteria A if Med Date 4 02 04 Senior nei Manager Instruments Jam Mer Date Hlozlod neral Manager LMC Cohen Ine Pare of 1 3sigma User Manual Quick Start QuicK START This section presents a series of mini tutorials explaining how to connect a sensor to your 3sigma and begin taking measurements within minutes For more in depth information refer to Operation on page 21 Follow all laser safety procedures The laser must be blocked or switched OFF before beginning any of the procedures described in this section Power to the 3sigma instrument must be OFF before beginning any of the procedures described in this section Do not exceed the power energy density limits of the sensor 3sigma User Manual Measuring Figure 1 shows how to set up a pyroelectr
90. y Status Display Average Sensor Status Operation The Auto Range indicator annunciates the state of the auto ranging of the instrument Auto displays when auto ranging is active Other wise nothing displays in this position A blinking Battery Status annunciator displays only when the battery needs recharging otherwise nothing appears in this posi tion It is important to note that during this low battery condition setup parameters cannot be saved Battery energy can be conserved by turning off the back light It takes approximately ten hours to fully charge a battery that has been completely discharged Should a battery replacement become necessary return the unit to Coherent for servicing Display values are averaged either by samples for pyroelectric sensors or time for thermopile and optical sensors When display averaging is enabled and a pyroelectric sensor is attached to the instrument AVG followed by the number of pulses expressed without units appears in the Display Average annunciator position Example AVG 1234 When display averaging is enabled and a thermopile or optical sensor is attached to the instrument AVG followed by the number of seconds and the letter s appears in the Display Average annunciator position Example AVG 994 s When display averaging is not enabled the Display Average annun ciator position is blank The Sensor Status annunciator position reports a sensor conne

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