Tektronix j17 User's Manual
Contents
1. The RS 232D Port Figure 3 1 Location of the RS 232D Port An RS 232 cable is available as an optional accessory to the J17 refer to Appendix A Accessories for order ing information This cable has a 3 5 mm connector for the J17 and a DB 9 female connector for connection to the computer Another common RS 232 connector on computers and terminals is the DB 25 connector Adapters are commercially available to convert from the DB 9 connector to a DB 25 connector The RS 232 interface is connected to a VT100 or VT102 terminal or a personal computer with a terminal emulator installed Typical examples of VT100 and VT102 emulators are Kermit ProComm and the Windows Terminal communications software J17 Instruction Manual 3 1 RS 232D Interface The J17 operates with the RS 232 parameters shown in Table 3 1 The terminal must also be in the local echo mode to see text as it is entered Table 3 1 RS 232 Parameters Parameter Value Baud Rate 2400 Data Bits 8 Stop Bits 1 Data Type Asynchronous Operational Half duplex accepts software flow Mode control RS 232 Pin Connections Figure 3 2 shows the pin connections of the J17 RS 232 port and the optional RS 232 cable The RS 232D port is a 3 5 mm stereo phone plug 3 5 mm Stereo Phone Plug Ground 5 9 4 8 DB 9 Female Figure 3 2 RS 232 Pin Connections 3 2 Reference Command Set RS 232D Interface The J17 Photometer recognize2. To stop reporting a NEW CR will stop and sus pend the continuous reports NOTE When using the J1820 color head the values delivered by the report will only be the value of the last measurement The START button must be pressed each time a new measurement is taken If an off scale 999 9 reading is taken the J17 will suspend RS 232D reporting until the reading is within the measurement range of the instrument Reference RS 232D Interface Report Format The data format for measurements consists of two major fields the measurement units and the measure ment value s See Figure 3 3 WM 0 000E0 XYZ 0 000E0 0 000E0 0 000EO Measurement Exponential Units Multiplier sse Table 3 3 Measurement Value Figure 3 3 RS 232D Report Format Measurement unit abbreviations are listed in Table 3 3 Values are displayed with four significant digits and a one digit exponential multiplier with an optional minus sign For multiple values for example the three values reported for an XYZ reading commas separate the values Each line is terminated by a carriage return and line feed CR LF J17 Instruction Manual 3 5 RS 232D Interface Table 3 3 Measurement Units Abbreviation Used Meaning C candelas CM candelas meter FC foot candles FL foot lamberts K Kelvin LUM lumens LUX lux W watts WM watts meter WMS watts meter steradian XYZ tristimulus values Reference Color Measurements
3. This section is included to clarify the function of the COLOR and START buttons COLOR Button The J17 has a button labeled COLOR for use with certain heads Pressing this button and toggling through the separate colors does not give a readout of the color component of that source The button is used when measuring pure color sources to fine adjust the sensor calibration to that specific color For example the RED mode should be selected when measuring the output of a red LED When using heads for a broad spectrum of light sources us the WHITE setting Use the color settings only if you are measuring narrow spectrum light sources such as lasers and LEDs J1820 Measurements The J1820 is a true color head Set the COLOR button to WHITE and then press the START button to get an accurate reading of the composition of the source The default color coordinate system is the x y system To change to the u v system press the UNITS button To display the luminance value press the ALT DISP button The default luminance units are cd m NITs To change to fL footlamberts press the UNITS button J17 Instruction Manual 3 7 Color Measurements To display measurements in the XYZ color coordinate system press the ALT DISP button The display will show the X and Y values To display the Z value press the UNITS button Reference Specifications Specifications These characteristics are valid under the following conditions
4. m The J17 and sensor head must have been cali brated at an ambient temperature between 20 C and 30 C m The J17 and sensor head must be used in an environment within the limits described in Table 4 5 Warranted Environmental Characteristics m The J17 and sensor head must have had a warmup period of at least 10 minutes Optical measurements are referred to photometric radiometric and colorimetric standards traceable to NIST J17 Instruction Manual 4 1 Specifications Table 4 1 Warranted Electrical Characteristics Characteristic Standard Accuracy 196 of reading 2 Counts Excluding sensor head in cluding nonlinearity Table 4 2 Warranted Sensor Ranges Sensor Units Max Reading Min Reading J1803 fL 500 000 0 01 cd m Nits 1 500 000 0 03 J1805 100 0 00001 J1806 W m sr 1000 0 001 J1811 fc 5000 0 001 lux Im m 50 000 0 01 J1812 20 000 0 01 2mW 1 nW J1820 fL 100 000 0 1 Y cd m Nits 300 000 0 3 J1820 0 999 0 001 u v Xy J1823 fL 10 000 0 1 cd m Nits 30 000 0 3 41823 fL 10 000 1 Opt 01 g m Nits 30 000 3 Refer to sensor head documentation for detailed specifications 4 2 Specifications Specifications Table 4 3 Typical Electrical Characteristics Characteristic Standard Power Requirements Alkaline battery 7M to 10V IEC type 6LR61 NEDA type 1604 External Power Supply 9Vto12VDC Battery Life 30 hours IEC 6LR61 battery with backlight of
5. 690 0 0227 0 0082 0 0000 695 0 0158 0 0057 0 0000 700 0 0114 0 0041 0 0000 705 0 0081 0 0029 0 0000 710 0 0058 0 0021 0 0000 715 0 0041 0 0015 0 0000 720 0 0029 0 0010 0 0000 725 0 0020 0 0007 0 0000 730 0 0014 0 0005 0 0000 735 0 0010 0 0004 0 0000 740 0 0007 0 0002 0 0000 745 0 0005 0 0002 0 0000 750 0 0003 0 0001 0 0000 755 0 0002 0 0001 0 0000 760 0 0002 0 0001 0 0000 765 0 0001 0 0000 0 0000 770 0 0001 0 0000 0 0000 775 0 0001 0 0000 0 0000 780 0 0000 0 0000 0 0000 Totals 21 3714 21 3711 21 3715 J17 Instruction Manual C 11 Appendix C Chromaticity Reference Appendices Glossary and Index Glossary Area Source A light source of large angular size Blackbody Planckian Radiator A thermal light source having light produced by heating The intensity and color of a blackbody are primarily dependent on operating temperature Chromaticity The quality of color Based on wavelength distribu tion and purity Color Temperature The absolute temperature in Kelvin of a blackbody required to produce an equivalent chromaticity from a light source Correlated Color Temperature The absolute temperature of a blackbody required to most closely match the chromaticity of a light Source The amount of luminous flux received by a unit of surface area Usually measured in lux lumens me ter or foot candles with a sensor spectrally matched to the average human eye Inverse Square Law The fallof
6. Abbreviations Abbreviations conform to American National Standards Institute ANSI standard Y1 1 J17 Instruction Manual 7 3 Replaceable Parts Figure 7 1 J17 Replaceable Parts 7 4 Replaceable Parts Replaceable Parts MgvO09LNIN OYOLML VIN8 O HVt O AG AHQ AH3LLIVG 00 4100 9vL l L0968E002 60008 OlLSV Td Qr1 AH3 LIVg SS300V HOOQ L oooozog 10 9688 00 009685002 60008 QI1AH3LIVS8 SS300V HOOG 6666109 0010109 00 968E 008 Zl 106501085 60008 Sav WOLLOd 41VH SNISNOH L 0000209 10 6601 088 00 6601 086 8LEXZ Sav WOLLOS JTVH ONISQOH 6666109 0010109 00 6E01 08E Ll 00 S700 98E OOvAS AZIGONV MOV 18 HOLO3NNOO O1NW 31V 1d 00 S700 98E 0L OS3Q H3QHO SELOML 711S HNd 881 0 X Op v 3NIHOVIA M3HOS 00 4000 112 6 001902129 60008 HOSS3OOHd ASSV LINDUIO 00 1902 179 8 Y3HLO 9 8 24 QN3 N3INn2OG MAL Yad 886041 Ot v M 109t 0 LS0d H3OVdS 00 19EL 6ZL 2 ZOddN SUg8 HNd 9830 Ad H3QHO 987031 S7 0 X 98 2 HHSM W3SSV HOS L 00 0810 112 9 006 bZ1 9 60008 AV1dSIQ ASSV LINDYIO 00 6 vz 179 S 9830 H3QHO Z6E0ML 71 MHL Z0 0 LIS 2 MOOT YSHSVM L 00 S00 012 t OS SLZL v4 Z dO 5 981 0 X 99 CX3H NIV 1d QN 00 90 0 012 lJ34SVO Y SdVO LOZEOLOSE 60008 XASSV ONISNOH dOL ASSV DNISNOH L 0000209 10 601 088 002 0L08 60008 L3YSV9 SdVOA3M N SV dOL ONISNOH 6666109 0010109 00 2E01 08E z 00 6820 L
7. Appendix A Optional Accessories A 1 Appendix B Photometry and Radiometry Reference 1 Appendix C Chromaticity Reference C 1 Glossary and Index J17 Instruction Manual iii Table of Contents iv List of Figures Figure 1 1 The J17 Photometer 1 2 Figure 1 2 Replacing the Battery 1 8 Figure 1 3 Location of J17 Power Adapter Connector 1 9 Figure 3 1 Location of the RS 232D Port 3 1 Figure 3 2 RS 232 Pin Connections 3 2 Figure 3 3 RS 232D Report Format 3 5 Figure 6 1 Test Point Locations on the Board nass en eee 6 8 Figure 7 1 J17 Replaceable Parts 7 4 Figure B 1 CIE Photopic Curve B 5 Figure C 1 The 1931 CIE Chromaticity Diagram C 3 Figure C 2 1931 CIE Chromaticity Diagram Showing Color Temperature C 4 Figure C 3 Correlated Color Temperature Diagram C 5 Figure C 4 1976 CIE UCS Chromaticity Diagram C 7 Figure C 5 Spectral Tristimulus Values for Equal Spectral Power Source CIE 1931 Standard 2 Observer C 8 Contents General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it Only qualified personnel should perform service proce dures While using this product you may need to access
8. Greenish Purplish sc purplish Red Blue Pink 200 100 Purplish Blue 000 100 200 300 400 500 600 700 Bluish Reddish Purple X Coordinate Purple Figure C 1 The 1931 CIE Chromaticity Diagram J17 Instruction Manual y Coordinate Appendix C Chromaticity Reference Figure C 2 shows the Planckian locus on the 1931 CIE diagram The numbers along this line indicate the color temperatures in degrees Kelvin for blackbody light sources 900 800 700 600 500 400 300 Infinity 200 100 000 100 200 300 400 500 600 700 x Coordinate Figure C 2 1931 CIE Chromaticity Diagram Showing Color Temperature C 4 Appendices 0 500 Appendix C Chromaticity Reference Figure C 3 shows selected isotemperature lines in the X y coordinate system A light source along one of the isotemperature lines will most nearly match the color temperature of a blackbody radiator indicated for that line 2854 2500 2000 3000 4000 0 450 0 400 5000 5500 6000 Planckian 6500 Locus 10000 7500 0 350 15000 20000 y Coordinate 0 300 0 250 0 200 0 200 0 250 0 300 0 350 0400 0 450 0 500 0 550 0 600 x Coordinate Figure C 3 Correlated Color Temperature Diagram J17 Instruction Although the colors displayed along an isotemperature line will appear similar there
9. 0 0580 0 1693 0 6162 490 0 0320 0 2080 0 4652 495 0 0147 0 2586 0 3533 500 0 0049 0 3230 0 2720 505 0 0024 0 4073 0 2123 510 0 0093 0 5030 0 1582 515 0 0291 0 6082 0 1117 520 0 0633 0 7100 0 0782 525 0 1096 0 7932 0 0573 J17 Instruction Manual C 9 Appendix C Chromaticity Reference Table C 1 Spectral Tristimulus Values for Equal Spectral Power Source CIE 1931 Standard 2 Observer Cont Wavelength nm x A y A z A 530 0 1655 0 8620 0 0422 535 0 2257 0 9149 0 0298 540 0 2904 0 9540 0 0203 545 0 3597 0 9803 0 0134 550 0 4334 0 9950 0 0087 555 0 5121 1 0000 0 0057 560 0 5945 0 9950 0 0039 565 0 6784 0 9786 0 0027 570 0 7621 0 9520 0 0021 575 0 8425 0 9154 0 0018 580 0 9163 0 8700 0 0017 585 0 9786 0 8163 0 0014 590 1 0263 0 7570 0 0011 595 1 0567 0 6949 0 0010 600 1 0622 0 6310 0 0008 605 1 0456 0 5668 0 0006 610 1 0026 0 5030 0 0003 615 0 9384 0 4412 0 0002 620 0 8544 0 3810 0 0002 625 0 7514 0 3210 0 0001 630 0 6424 0 2650 0 0000 635 0 5419 0 2170 0 0000 640 0 4479 0 1750 0 0000 645 0 3608 0 1382 0 0000 650 0 2835 0 1070 0 0000 655 0 2187 0 0816 0 0000 660 0 1649 0 0610 0 0000 665 0 1212 0 0446 0 0000 670 0 0874 0 0320 0 0000 675 0 0636 0 0232 0 0000 C 10 Appendices Appendix C Chromaticity Reference Table C 1 Spectral Tristimulus Values for Equal Spectral Power Source CIE 1931 Standard 2 Observer Cont Wavelength nm x ya z A 680 0 0468 0 0170 0 0000 685 0 0329 0 0119 0 0000
10. battery Install a fresh battery and ensure that it is seated correctly If the optional AC adapter is available use it to connect the J17 to a power source The Display Shows Err The word Err error appears on the display when you press a button that is not appropriate with the sensor head attached to the J17 or not appropriate in the chosen operating mode Measurements are Inaccurate If measurements taken with the J17 are inaccurate or inconsistent check the operating setup m Connect the sensor head to the J17 before powering on If not turn the J17 off then turn it back on The J17 will load data from a sensor head at power on m sure that the sensor head is positioned so that the measurement field is entirely filled This is important for luminance radiance and chroma ticity measurements m Make sure that the area being viewed by the sensor head is uniformly illuminated This is important for luminance radiance and chroma ticity measurements J17 Instruction Manual 6 3 Maintenance Position the sensor head so that it does not shadow the surface being measured Shadowing will occur if the surface is being measured from direction of the illumination Do not operate the head in contact with the surface Placing the head too close to the surface may cause shadowing Reflections may also occur between the front surface of the head and the surface to be measured The light shield or suction cup p
11. other parts of the system Read the General Safety Summary in other system manuals for warnings and cautions related to operating the system Injury Precautions Do Not Operate in Wet Damp Conditions To avoid electric shock do not operate this product in wet or damp conditions Do Not Operate in Explosive Atmosphere To avoid injury or fire hazard do not operate this product in an explosive atmosphere Wear Eye Protection To avoid eye injury wear eye protection if there is a possibility of exposure to high intensity rays J17 Instruction Manual General Safety Summary vi Product Damage Precautions Use Proper Power Source Do not operate this product from a power source that applies more than the voltage specified Do Not Operate With Suspected Failures If you suspect there is damage to this product have it inspected by qualified service personnel Do Not Immerse in Liquids Clean the probe using only a damp cloth Refer to cleaning instructions Safety Terms and Symbols Terms in This Manual These terms may appear in this manual Warning statements identify conditions or practices that could result in injury or loss of life Caution statements identify conditions or practices that could result in damage to this product or other property Safety General Safety Summary Static Sensitive Devices Terms on the Product These terms may appear on the product DANGER indicates an injury h
12. power capacity and cell voltage will not support the J17 J17 Instruction Manual 1 7 Battery and Power Information 1 8 Low Battery Warning When battery voltage is below 7 2 volts the J17 Pho tometer displays the flashing warning BAT in the upper left corner of its display At this point you should re place the alkaline battery see below If the battery voltage is below 7 2 volts at initial power on the J17 will not proceed past the self test Replacing the Alkaline Battery To replace the alkaline battery refer to Figure 1 2 9 V Alkaline Figure 1 2 Replacing the Battery Step 1 Turn off the J17 Photometer L Step 2 Open the battery compartment located on the back cover of the J17 Step 3 Remove the used battery and replace it with a fresh one arranging the wires so that they will not interfere with the battery cover Step 4 Close the battery compartment Step 5 Turn on the J17 and make sure that the low battery BAT warning is no longer flashing Getting Started Battery and Power Information Using the Optional AC Power Adapter The J17 Photometer may be powered indefinitely by using the external AC power adapter available as an optional accessory The power adapter will override the alkaline battery if one is installed To use this adapter plug the adapter s pin connector into the EXT POWER connector on the side of the J17 see Figure 1 3 Plug the power adapter
13. 0 Step 9 While still connected to test point 32 ground check test point 31 for a voltage of 5 000 V 0 025 V If the voltages at test points 30 and 31 are correct the problem is not the power supply If these voltages are not correct the A1 board must be replaced Test Point 32 Test Point 30 Test Point 31 X Test Point 90 47 2 V or Higher Figure 6 1 Test Point Locations on the A1 Board Maintenance Ground 5 75 V 0 05 V Replaceable Parts Replaceable Parts This section contains a list of the modules that are replaceable for the J17 Photometer and the J1800 Se ries sensor heads Use this list to identify and order replacement parts Parts Ordering Information Replacement parts are available from or through your local Tektronix Inc service center or representative Changes to Tektronix instruments are sometimes made to accommodate improved components as they be come available and to give you the benefit of the latest circuit improvements Therefore when ordering parts it is important to include the following information in your order m Part number m Instrument type or model number m Instrument serial number m Instrument modification number if applicable If a part you order has been replaced with a different or improved part your local Tektronix service center or representative will contact you concerning any change in the part number Change information if any
14. 86 VM H3AnOONVA Ul6 AN V SLOLL ONI SOLLSV Id OSVM 8L X O9 DAW SLYVd NOLUSAV38 0 AIC 6299 2116 HO OHOS8STIIH MN SAV 1912 0081 SLONGOYd IWLAW XviHL 00v AS v 1226 HO GNV1ILYOd NVIAH3HS 3S 018 AlddNS U344NVLS LOAMO ccs 9018 0046 HO NOLH3AV38 JAIHA SNHUIO MS 26Z SOINOuLO3 13 H3MOd OHDIN 9MMAO 64805 CIN DOUNISUFHLIVDO LHVHOHOV38 218 3 14 YZI 968171 OO AHS L1V 16901 AN NMOLAHHVL AVMQVOHS ONI IVNOLIVNHAINI TISOVENG 09041 6116 HO HL9LZ MN 8221 SLONAOHd NOISIO3Hd IWSHSAINN 886041 Oc 60909 11 OOVOIHD AAV 3NIOVU 0057 OO SEVOAL 8v v9 90076 HO NOLH3AV38 SNHHIO MS c6Z ONI 5915 H3N3ISVd ISHMHIHON 665094 diz 1 1 AID Jonjoejnue y YAYNLOVANNVIN OL YAEINNN 3009 HAN X3QNI 55099 J17 Instruction Manual Replaceable Parts 7 8 Replaceable Parts Appendices Appendix A Optional Accessories In addition to the J1800 Series sensor heads the following items are available for use with the J17 Pho tometer m External DC power supply 120 VAC North American m External DC power supply 220 VAC European m RS 232D cable For part number information refer to the Replaceable Parts section For detailed information and prices or to obtain re placements see a Tektronix products catalog or con tact your local Tektronix field representative J17 Instruction Manu
15. IAL INCIDENTAL OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES Table of Contents General Safety Summary Injury Precautions Product Damage Precautions vi Safety Terms and Symbols vi olvide ix Getting Started Product Description 1 1 J17 Photometer Features 1 1 Unpacking the J17 Photometer 1 3 Repackaging for Shipment 1 3 Setup une ye 1 5 Battery and Power Information 1 7 Using Battery Power 1 7 Using the Optional AC Power Adapter 1 9 Operating Basics Functional Overview 2 1 The J17 2 2 The J17 Side Panel 2 3 J17 Instruction Manual i Table of Contents Reference RS 232D Interface 3 1 RS 232 Pin Connections 3 2 Command 3 3 Report Format 3 5 Color Measurements 3 7 COLOR Button 3 7 J1820 Measurements 3 7 Specifications Performance Verification Maintenance 4 na 6 1 Calibration eue enr 6 2 Replaceable Parts ii Contents Table of Contents Appendices
16. Instruction Manual Functional Overview Connect a J1800 Series sensor head here O TEK LUMACOLOR RANGING UNITS O The POWER aie switch turns the J17 on or off The J17 performs a brief self test at power on Press the RANGING button to switch from autoranging to manual ranging and to step through the manual ranges This feature cannot be used with the J1820 HOLD COLOR START EN Rear Panel Location of battery compartment Press UNITS to select the 17 Protometer alternate units if any displayed Colorimeter readings ktronix When using the J1820 Chromaticity head press START to initiate a new reading When using the J1820 Chromaticity head press ALT DISP to cycle among chromaticity coordinates luminance and raw XYZ tristimulus values Functional Overview The J17 Display The BAT icon flashes when the battery voltage drops below 7 2 V See page 1 8 One of WHT RED YEL GRN or BLU appears to show the selected correction factor White is the default The bar graph indicates the level of the input signal at the A D converter which affects the accuracy of the reading When using manual ranging choose the range that produces the longest bar graph for best accuracy The specified accuracy may not be available i
17. Instruction Manual Tektronix P4 J17 LumaColor Photometer 070 8531 04 This document applies for firmware version 1 00 and above Warning The servicing instructions are for use by qualified personnel only To avoid personal injury do not perform any servicing unless you are qualified to do so Refer to all safety summaries prior to performing service ce Copyright Tektronix Inc All rights reserved Tektronix products are covered by U S and foreign patents issued and pending Information in this publication supercedes that in all previously published material Specifications and price change privileges reserved Printed in the U S A Tektronix Inc PO Box 1000 Wilsonville OR 97070 1000 TEKTRONIX and TEK are registered trademarks of Tektronix Inc WARRANTY Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one 1 year from the date of shipment If any such product proves defective during this warranty period Tektronix at its option either will repair the defective product without charge for parts and labor or will provide a replacement in exchange for the defective product In order to obtain service under this warranty Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service Customer shall be responsible for packaging and shipping the defective prod
18. L2 LOHMO 1LS D4S X3H 1 939007 v dvO M3HOS v 00 68 0 112 1 H3laWoloHd ZLf 1 4 ON Med YIN uonduoseg SbezL AD ossa ON Med YIN ON 8149S XJUOIM9L 3 bl J17 Instruction Manual Replaceable Parts 001171210 60008 10 2Z 318V9 e eSu NOOLNI318VO 00 17 60 6 9MId XVOO WIAS S M d18vO WO 8L ZHOS OVAOZZ aAFLVINDSHNN 0 dO M 80960 QV tZv2ML vW009 6 H3MOd 00 6 8 611 9MId XVOO GI WWO S M F1EVO WO 8L ZH0O9 OvAOcL Q31v 1n o3HNn S0 dO MOL2L QV vtZVoML VWOOL AZ LMZ EX1ddn s H3MOd 00 c 0S 6LL 8l S3lHOSS392V IVNOILLdAO 501598010 60008 LMKP NOLLOQHLSNEHO3L IVONVIW 0 1ES8 0Z0 SIIHOSSIIIV AUVANVLS N39880 0H890W IWOHd HOSS300HdOHOIIN 00958809 60008 8X8029VIIODITO 1 00 9588 09L Z 881 0 Iv AN3 H3HLO 9 S NAWNOOd MAL Had 88901 3NOGHLOP v W109r04SOd H3OvdS 00 19E1 621 94 9830 SEPOML 11S HNd 881 0 X Ot v INIHOYW MIHOS Z 00 4000 112 Sl 9830 AYALIVEWOIWLOATSdNO 00 09LL 1 L tl ON Hed YIN 8POD uonduoseq SpezL oosa eAnoep3 AN ON XiuOJ9L 3 bl Replaceable Parts Replaceable Parts 00S XO8 Od 1000 22026 HO NNVYd THVM MS 067 XINOH DI3 L 60008 6 26 9201 AM ONIHdS C109 Qu TVIHLSNANI LLL OO DAW 1viO3dS YIHOSI 57151 299
19. al A 1 Appendix A Optional Accessories Appendices Appendix B Photometry and Radiometry Reference This appendix summarizes convenient relationships and formulas used in photometry and radiometry Photometric Relationships In photometry the spectral sensitivity of the sensor is matched to the average human eye with a peak at 555 nm An isotropic light source a source that emits light uniformly in all directions of 12 6 lumens is 1 can dela 1 candle power A 1 candela source at a distance of 1 meter pro vides an illuminance of 1 lux on a surface regard less of the reflectance of the surface A 1 candela source at a distance of 1 foot provides an illuminance of 1 footcandle on a surface regard less of the reflectance of the surface Moving a light source further from a surface re duces the illuminance proportionally with the square of the distance inverse square law For example moving a 1 candela source from 1 foot to 2 feet will reduce the illuminance to footcandle A perfectly white diffuse surface illuminated by 1 footcandle has a surface luminance of 1 footlam bert J17 Instruction Manual B 1 Appendix B Photometry and Radiometry Reference m A diffuse surface that has a reflectance of less than 100 will have a surface luminance in footlam berts equal to the illuminance in footcandles multi plied by the reflectance factor m Measurement of the luminance of a large uniformly illumin
20. ated surface is essentially independent of distance since the area viewed by the sensor increases with the square of the distance exactly compensating for light falloff due to the inverse square law Photometric Formulas 10 764 footcandles lux lumens meter 3 426 footlamberts nits candela meter footcandles distance feet candelas lux distance in meters candelas footcandles surface reflectance factor footlamberts B 2 Appendices Appendix B Photometry and Radiometry Reference Radiometric Relationships In radiometry an ideal sensor has equal sensitivity to all wavelengths of light being measured An isotropic light source a source that emits light uniformly in all directions of 12 6 watts produces a radiant flux of 1 watt steradian 1 watt steradian at a distance of 1 meter produces an irradiance of 1 watt meter Moving a light source further from a surface re duces the irradiance proportionally with the square of the distance inverse square law For example moving a 1 watt steradian source from 1 meter to 2 meters will reduce the irradiance to 1 4 watt me ter A perfectly white diffuse surface illuminated by an irradiance of 1 watt meter has a surface radiance of 318 watt meter steradian irradiance divided by n A diffuse surface that has a reflectance of less than 10096 will have a surface radiance in watts me ter steradian equal to the irradiance multip
21. azard immediately acces sible as you read the marking WARNING indicates an injury hazard not immediately accessible as you read the marking CAUTION indicates a hazard to property including the product Symbols on the Product The following symbols may appear on the product 4 A a DANGER Protective ATTENTION Double High Voltage Ground Earth Refer to Insulated Terminal Manual J17 Instruction Manual vii General Safety Summary viii Safety Preface This is the Instruction Manual for the J17 LumaColor Digital Photometer Radiometer Colorimeter This manu al covers all operating instructions for the J17 This manual is divided into the following sections Getting Started contains a product description and initial setup information Operating Basics contains a functional overview of the photometer controls display and connections Reference provides information on the RS 232 interface and color measurement techniques Specifications Performance Verification Maintenance Replaceable Parts Appendices contains chromaticity reference in formation in the form of graphs and lookup tables It also contains descriptions of optional accesso ries Glossary Index For additional information on the operation and specifications of the sensor heads please refer to the Technical Reference manual that came with your sensors J17 Instruction Manual ix Preface X Preface Getting Started Product De
22. ecifications electrical 4 3 environmental 4 4 mechanical 4 3 operating conditions 4 1 sensors 4 2 warranted 4 2 Syntax RS 232 3 3 Index T Test Points 6 8 Testing 1 5 See also Performance Verification Tristimulus values C 8 Troubleshooting accuracy 6 3 backlight 6 3 basic 6 3 circuit boards 6 5 power 6 3 power supply 6 6 RS 232 6 4 test points 6 8 U UNITS button 2 7 X XYZ values C 8 Glossary and Index
23. er O Step 4 If you are shipping the product to a Tektro nix Service Center be sure to label the carton with the name of your company a person to contact at your company and a description of the problem J17 Instruction Manual 1 3 Product Description Getting Started Setup Follow this sequence when you set up the J17 Photometer 0 Step 1 Check that a nine volt alkaline battery is installed in the battery compartment see page 1 8 or use the optional AC adapter to con nect the J17 to an external power source see page 1 9 0 Step 2 Cover or shield the J1800 Series sensor head from ambient light The photometer self test period will be significantly shorter if the sensor is kept in the dark Step 3 Connect a J1800 Series sensor head to the J17 Always connect the sensor head to the J17 before turning on the power The J17 loads data from the sensor head at power on If you connect a new sensor head to the J17 while the power is on any measure ments you take may be inaccurate NOTE The J1810 sensor will not work with the J17 0 Step 4 Move the J17 POWER switch to the ON position When you turn the power on the J17 performs the following actions J17 Instruction Manual 1 5 Setup 1 6 The J17 performs a brief self test During the self test the J17 activates all elements of the display checks the battery voltage and performs the auto zero and auto range functions NOTE If no se
24. f and RS 232 unplugged Battery Low Indication 7 2V Table 4 4 Typical Mechanical Characteristics Characteristic Standard Height 198 mm 7 8 inches Without sensor Width 93 mm 3 7 inches Depth 34 mm 1 3 inches Shipping Weight 1 4 kg 3 Ibs Includes battery manual and packaging J17 Instruction Manual 4 3 Specifications Table 4 5 Warranted Environmental Characteristics Characteristic Standard Temperature Nonoperating 55 Cto 85 C Operating 15 55 C Humidity operating and J17 Meets MIL Std 28800E Class 3 nonoperating Refer to the Environmental Character istics for each J1800 Series sensor head Table 4 6 Certifications and compliances EC Declaration of Meets intent of Directive 89 336 EEC for Conformity Electromagnetic Compatibility Compliance was demonstrated to the following specifica tions as listed in the Official Journal of the European Communities EN 55011 Class B Radiated and Conducted Emissions EN 50081 1 Emissions EN 60555 2 Power Line Harmonic Emissions EN 50082 1 Immunity IEC 801 2 Electrostatic Discharge Immunity IEC 801 3 RF Electromagnetic Field Immunity IEC 801 4 Electrical Fast Transient Burst Immunity IEC 801 5 Power Line Surge Immunity FCC Compliance Emissions comply with FCC Code of Federal Regulations 47 Part 15 Subpart B Class A Limits 4 4 Specifications The following servicing instructions are for use only b
25. f of light with distance light varies inverse ly with the square of the distance from the source Irradiance The amount of radiant flux received by a unit of surface area Usually measured in watts meter or watts cm with a sensor having equal spectral sensitivity to the wavelengths being measured J17 Instruction Manual G 1 Glossary Isotropic Source A light source that emits light uniformly in all direc tions Luminance The amount of light emitted or scattered by a surface Usually measured in candelas meter nits or foot lamberts with a sensor spectrally matched to the average human eye Luminous Flux The total light from a source measured in lumens with a sensor spectrally matched to the average human eye Luminous Intensity The luminous flux through a unit of solid angle Usually measured in candelas lumens steradian with a sensor spectrally matched to the average human eye Photometry Measurement of light as seen by the human eye Photopic Correction The correction of a sensor to match the CIE sensi tivity function of the average human eye Point Source A light source of small angular size such that light appears to come from a point Radiance The amount of radiant energy emitted or scattered by a surface Usually measured in watts me ter steradian with a sensor having equal spectral sensitivity to all wavelengths being measured Radiant Flux The total radiation from a source measured in watts
26. f the graph is at the low end of the scale The MAN icon shows that manual ranging is selected The SAV icon indicates that the displayed reading is not being updated the HOLD button has been pressed WH 0 bai X YEL GRN a BLU Y t a au nm W m 2 H AV sr u cdkK kluxlm kcd m Measurement readouts are displayed as numerical values in the center of the display with the appropriate units shown along the left or right side Additional items may appear on the display during self test Operating Basics The J17 Side Panel Functional Overview 9 to 12VDC 50 MAX BACKLIGHT O INTENSITY RS232D er a Connect the optional Use the BACKLIGHT Connect an RS 232 AC adapter here INTENSITY control to cable here for data See page 1 9 vary the brightness of logging to a computer the display backlight See page 3 1 2 3 J17 Instruction Manual Functional Overview Operating Basics Reference RS 232D Interface You can use the J17 Photometer s RS 232D port to read measurements to a remote terminal or to save measurement readings to a file on a computer Any ASCII terminal or communications software may com municate with the J17 via the RS 232D port 9 to 12VDC 50 BACKLIGHT O INTENSITY RS232D
27. gt 300 Purple gt Blue Purple 200 100 000 100 200 300 400 500 600 Purplish Blue u Coordinate Figure C 4 1976 CIE UCS Chromaticity Diagram J17 Instruction Manual C 7 Appendix C Chromaticity Reference Spectral Tristimulus Values Figure C 5 shows the spectral tristimulus XYZ values for a light source of equal spectral power Table C 1 lists the same data in tabular format z A y x A 0 8 0 6 0 4 0 2 380 430 480 530 580 630 680 730 780 Wavelength nm Figure C 5 Spectral Tristimulus Values for Equal Spectral Power Source CIE 1931 Standard 2 Observer Note that y A is also the photopic curve that represents the relative sensitivity of the average human eye c 8 Appendices Appendix C Chromaticity Reference Table C 1 Spectral Tristimulus Values for Equal Spectral Power Source CIE 1931 Standard 2 Observer Wavelength nm x ya z A 380 0 0014 0 0000 0 0065 385 0 0022 0 0001 0 0105 390 0 0042 0 0001 0 0201 395 0 0076 0 0002 0 0362 400 0 0143 0 0004 0 0679 405 0 0232 0 0006 0 1102 410 0 0435 0 0012 0 2074 415 0 0776 0 0022 0 3713 420 0 1344 0 0040 0 6456 425 0 2148 0 0073 1 0391 430 0 2839 0 0116 1 3856 435 0 3285 0 0168 1 6230 440 0 3483 0 0230 1 7471 445 0 3481 0 0298 1 7826 450 0 3362 0 0380 1 7721 455 0 3187 0 0480 1 7441 460 0 2908 0 0600 1 6692 465 0 2511 0 0739 1 5281 470 0 1954 0 0910 1 2876 475 0 1421 0 1126 1 0419 480 0 0956 0 1390 0 8130 485
28. into an exter nal AC power outlet providing 120 VAC at 60 Hz 9 to 12VDC 50 MAX BACKLIGHT O INTENSITY RS232D Q 00 Figure 1 3 Location of J17 Power Adapter Connector The AC power adapter supplies approximately 12 VDC at a minimum of 50 mA Be sure that any power supply you use with the J17 provides power within the range of 9 to 12 VDC and that the center contact polarity of the adapter is positive A power supply that does not meet these requirements may dam age the J17 J17 Instruction Manual 1 9 Battery and Power Information The backlight will be illuminated at power on when the J17 is powered by the AC power adapter The backlight may be turned off if desired by pressing the BACK LIGHT button NOTE Power supplies that provide less than 12 volts DC may not automatically turn on the back light 1 10 Getting Started Operating Basics All readings appear on the display See page 2 2 Press the BACKLIGHT button to light the display Use the BACKLIGHT INTENSITY control on the right side of the J17 to adjust the backlight Press HOLD to keep the current measurement reading on the display This stops measure ment updating until you press HOLD again Press COLOR to cycle among white red yellow green and blue correction factors to maximize accuracy for narrow band light sources such as LEDs J17
29. ion factors 2 1 J1820 3 7 LEDs 3 7 measurements 3 7 COLOR button 2 1 3 7 Color temperature diagram C 5 Commands INEW 3 4 RS 232 3 3 Controls 2 1 Correlated color temperature dia gram C 5 Index D J Data logging RS 232 3 1 J17 front panel controls 2 7 Display BAT 2 2 MAN 2 2 SAV 2 2 K updating 2 1 Kelly chart C 2 E Err 6 3 L LEDs color correction 2 1 F Features 1 1 M Maintenance calibration 6 2 H cleaning 6 1 MAN icon 2 2 HOLD button 2 1 Manual ranging 2 7 Measurements 1 5 Isotemperature lines diagram 5 1 2 Glossary and Index N INEW command continuous data logging 3 4 data format 3 5 definition 3 4 P Packaging 1 3 Parts ordering 7 1 Photometry formulas B 2 reference B 1 4 Power AC adapter 2 3 battery 1 7 switch location 2 1 Power supply troubleshooting Power on sequence 1 3 R Radiometry formulas B 3 reference B 3 4 Ranging manual 2 1 J17 Instruction Manual Index RANGING button 2 Replaceable Parts ordering 7 1 RS 232 baud rate 3 2 cable 3 1 commands 3 3 connection 2 3 3 1 data bits 3 2 data format 3 5 data logging 3 1 3 4 data type 3 2 flow control 3 2 parameters 3 2 stop bits 3 2 syntax 3 3 troubleshooting 6 4 S SAV icon 2 2 Setup 1 5 Shipping 1 3 Side panel 2 3 Sp
30. is located at the rear of this manual J17 Instruction Manual 7 1 Replaceable Parts Using the Replaceable Parts List The tabular information in the Replaceable Parts List is arranged for quick retrieval Understanding the struc ture and features of the list will help you find the all the information you need for ordering replacement parts Item Names In the Replaceable Parts List an Item Name is sepa rated from the description by a colon Because of space limitations an Item Name may sometimes ap pear as incomplete For further Item Name identifica tion U S Federal Cataloging Handbook H6 1 can be used where possible Indentation System This parts list is indented to show the relationship between items The following example is of the indenta tion system used in the Description column 1 2 3 4 5 Name amp Description Assembly and or Component Attaching parts for Assembly and or Component END ATTACHING PARTS Detail Part of Assembly and or Component Attaching parts for Detail Part END ATTACHING PARTS Parts of Detail Part Attaching parts for Parts of Detail Part END ATTACHING PARTS Attaching parts always appear at the same indentation as the item it mounts while the detail parts are in dented to the right Indented items are part of and included with the next higher indentation Attaching parts must be purchased separately unless otherwise specified Replaceable Parts Replaceable Parts
31. lied by the reflectance factor and divided by Measurement of the radiance of a large uniformly illuminated surface is essentially independent of distance since the area viewed by the sensor increases with the square of the distance exactly compensating for light falloff due to the inverse square law Radiometric Formulas watt cm 10000 watt meter watt meter distance in meters watt steradian J17 Instruction Manual B 3 Appendix B Photometry and Radiometry Reference A Note on the Relation of Photometric and Radiometric Data Note that it is not possible to convert photometric units to radiometric units or the reverse except under pre cisely specified conditions This is due to the greatly differing spectral sensitivity curves between photomet ric and radiometric sensors For a 555 nanometer monochromatic source 1 watt is equal to 683 lumens Conversion of photometric data to radiometric data for monochromatic sources of other wavelengths may be calculated using the relative sensitivity of the photopic response curve at that wave length y A in Table C 1 Broader sources must be converted using mathematical integrations of their intensity and the photopic curve at each wavelength Appendices Appendix B Photometry and Radiometry Reference CIE Photopic Curve The CIE photopic curve is an international standard for the color response of the average human eye By definition footcandles footlamber
32. nsor head is connected to the J17 the J17 will not proceed past the self test display Low battery voltage is indicated by a flashing BAT indicator If this icon appears replace the battery with a fresh one before taking any measurements The J17 will display the default measurement units for the type of sensor head attached If measure ments are continuously updated as with the J1803 Luminance Head the J17 begins displaying mea surement readings automatically With the J1820 Chromaticity Head the J17 will complete one measurement cycle and stop Pressing the START button initiates a new measurement cycle Getting Started Battery and Power Information The J17 Photometer may be powered by either of the following sources m Anon rechargeable nine volt alkaline battery m An external AC power adapter available as an optional accessory See Replaceable Parts for information about available accessories Using Battery Power The J17 Photometer provides a low battery warning to help prevent incorrect readings due to low battery power Refer to Specifications for details on expected battery life and environmental concerns Use the Correct Battery Use only a nine volt alkaline battery IEC type 6LR61 NEDA type 1604 A carbon zinc nine volt battery may be used safely but the operating life will be one third to one half that of an alkaline battery Do not use rechargeable NiCd nickel cadmium batter ies Their low
33. ower Supply To check the power supply you will need m 3 52 inch hex wrench m Posidriv screwdriver m aDC voltmeter for voltages in the range 0 to 15 V m Nine volt IEC 6LR61 type alkaline battery Maintenance Maintenance O Step 1 Remove the battery from the battery compartment To avoid equipment damage do not apply power to the J17 while disassembling it Static electricity can damage the circuit boards of the J17 Observe static precau tions when the covers of the J17 are re moved O Step 2 Using the hex wrench remove the four screws from the J17 front panel 0 Step 3 Remove the back cover of the J17 0 Step 4 Remove the five screws that attach the A1 board to the A2 board Step 5 Gently pull the two boards apart taking care not to bend the connector pins on the A1 board Step 6 Connect the battery to the A1 board and turn on the power switch Step 7 Connect the voltmeter to test point 90 and test point 32 ground Check test point 90 for a voltage of 7 2 V or higher Refer to Fig ure 6 1 for test point locations J17 Instruction Manual 6 7 Maintenance 5 000 V 0 025 V 4 Em If the voltage at test point 90 is less than 7 2 V the problem is the battery not the power supply If the voltage is 7 2 V or greater proceed to Step 8 Step 8 Hold the connection to test point 32 ground and check for a voltage of 5 75 V 0 05 V at test point 3
34. ping it with a damp cloth Follow these important guidelines m Dampen a soft cloth and wipe the dirt off Do not spray cleaner directly onto the photometer m Useamild detergent or isopropal alcohol Do not clean the case with strong solvents that may etch the plastic or remove the lettering J17 Instruction Manual 6 1 Maintenance Sensor Cleaning Clean the sensor case by wiping it with a soft damp cloth Do not attempt to cleaning the internal optics Follow these important guidelines m Follow the guidelines for cleaning the photometer case m Clean external lenses using a lens cloth damp ened with lens cleaning solution Do not apply lens cleaning solution directly to the lens m Use clean compressed air to blow dust out of sensors Calibration An annual recalibration of the heads will ensure best accuracy The Performance Verification section in the manual that is shipped with the sensor head details the procedures for checking the sensor heads There are no calibration adjustments within the photometer or sensors Calibration values are stored in an EEPROM circuit located in the sensor head Contact you local Tektronix representative for assis tance if either product does not pass a performance verification check 6 2 Maintenance Maintenance Basic Troubleshooting This section lists some common problems and their most likely causes The J17 Does Not Power On or Backlight Does Not Light Check the
35. rovides adequate spacing between the head and the surface to prevent reflection on backlighted surfaces Check for cable damage where the cable enters the photometer plug and sensor head Be careful not to stress the sensor cable and damage it Do not flex the sensor head cable when taking low light measurements The high sensitivity of the photometer will detect charges generated in the cable when used at high sensitivity ranges If measurements are still incorrect the sensor head may require calibration Contact your Tektronix repre sentative RS 232 Port Does Not Work Check the following to make sure that you are prop erly connected to the RS 232 port Check the terminal software to make sure it is addressing the correct COM port Check the communication protocols to make sure they agree with those in the Specifications section Maintenance Maintenance m Turn on the backlight and see if it goes out when entering a command via the RS 232 port The backlight will come back on when the command is ended or if it is invalid m Make sure that any adapters that you are using are correctly wired Board level Troubleshooting The two circuit boards in the J17 may be replaced If the J17 does not function you can use these proce dures to isolate the problem to one of the boards Refer to Replaceable Parts for ordering information Static electricity can damage the circuit boards of the J17 Observe static preca
36. s a single command NEW which causes it to report a measurement or a series of measurements The J17 is case sensitive so the command must be in all capital upper case let ters Table 3 2 summarizes the syntax conventions of the command set Table 3 2 Elements of J17 Command Syntax Symbol CR LF white space italics J17 Instruction Manual Meaning Begins command All commands should be prefaced with an exclama tion point Carriage return ASCII 13 recog nized as an end of command delimit er Line feed ASCII 10 also recognized as an end of command delimiter A space act as a parameter delimiter within commands The J17 also rec ognizes a comma as a parameter delimiter these two characters may be used interchangeably Use only one space or comma as a delimiter multiple delimiters will result in a null statement Items in italics are names of parame ters Specify the appropriate value when entering the command RS 232D Interface NEW causes the J17 to report a measurement or a series of measurements NE 2 NE W CR causes the J17 to transmit the a single reading the one currently displayed W n CR causes the J17 to transmit multiple readings as they are taken Any value for n greater than 128 causes the J17 to report measurements continuously until another command is sent To interrupt the reporting a single will hold re ports
37. s values X Y Z by the following equations E X Y XY Ee EXE EZ The main features of the 1931 CIE chromaticity diagram include m All colors perceptible to the average human eye fall within the bounded area of the chart m A straight line drawn through two colors and passing through the equal energy point x 0 333 y 0 333 indicates complimentary colors m Saturated colors which are located on the periph ery of the bounded area are monochromatic except on the purple to red boundary Colors become progressively less saturated toward the white achromatic region in the center The degree of saturation is a measure of color purity m Boundaries between colors are not distinct one color blends gradually into the next m The ratio of distances between two colors to a third color located on a line drawn between them is proportional to the ratio of intensities of a mixture of those two colors required to produce the third color The principal disadvantage of the x y chart is that equal distances on the diagram do not represent equal perceived color distances Appendices Appendix C Chromaticity Reference 900 800 700 Yellowish Greenish Yellow 600 Green Yellow Yellowish Green Orange 500 Reddish E Orange 5 O g 400 range gt Pas cud gt Pink Blue 300 Green
38. scription The J17 is a handheld digital light measurement device The interchangeable J1800 Series sensor heads designed for use with the J17 Photometer provide the ability to make photometric radiometric and colorimetric measurements J17 Photometer Features The J17 provides the following features Autoranging Auto zero Readings in either English or metric units RS 232D interface Interchangeable heads for future expansion Battery or AC powered operation AC adapter available as an optional accessory Backlighted display J17 Instruction Manual 1 1 Product Description J17 Photometer Radiometer Colorimeter Tektronix O Figure 1 1 The J17 Photometer 1 2 Getting Started Product Description Unpacking the J17 Photometer The J17 Photometer is shipped with the following equipment m J17 Photometer m Instruction Manual m Alkaline battery already installed in the J17 Repackaging for Shipment If you must ship the J17 package it as follows O Step 1 Use the original carton or an equivalent carton with dimensions at least three inches greater than the instrument to allow for proper cushioning Step 2 Cover the instrument with a polyethylene bag to protect its finish Step 3 Cushion the instrument on all sides with packing material Seal the carton with shipping tape or with an industrial stapl
39. ts lux and nits are based on a detctor having a color response identical to the CIE photopic curve Tektronix photopic sensors have response curves that match the CIE photopic curve Refer to Figure B 1 100 80 60 40 20 Relative Spectral Response 96 380 420 460 500 540 580 620 680 700 nm Figure B 1 CIE Photopic Curve J17 Instruction Manual B 5 Appendix B Photometry and Radiometry Reference Appendices Appendix C Chromaticity Reference The reference material in this appendix can help you categorize and understand chromaticity measurements taken using the J1820 Chromaticity head This appen dix includes m the 1931 CIE Chromaticity diagram for x y readings m the 1976 CIE UCS chromaticity diagram for u v readings m Spectral tristimulus X Y Z values for an equal spectral power source in both graphical and tabular format For additional information we recommend the article Standardizing CRT Measurements by Peter Keller in the April 1984 issue of Test and Measurement World J17 Instruction Manual C 1 Appendix C Chromaticity Reference The 1931 CIE Chromaticity Diagram The 1931 CIE chromaticity diagram also known as a Kelly chart is shown in Figure C 1 The diagram can be used to categorize chromaticity measurements ex pressed as x y values The x y values are determined from the spectral tristimulu
40. u tions when the covers of the J17 are re moved Servicing should be performed by qualified personnel only Most functions of the J17 are located on the A1 board The A2 Display board controls the display backlight and keyboard The general troubleshoot ing sequence for the J17 is 1 Verify that the problem is not covered in Basic Troubleshooting 2 Check for a display backlight or keyboard problem indicating the A2 board If there ap pears to be a display problem also check the power supply on the A1 board which could be at fault J17 Instruction Manual 6 5 Maintenance 3 Other problems are typically due to the A1 board If a power supply problem is suspected perform the procedure in Checking the Power Supply on page 6 6 to verify that the power supply and not the battery is at fault The A1 Board Most functions of the J17 are located on the A1 board Checking the Power Supply on page 6 6 will allow you to determine whether there is a power supply problem The A2 Display Board The A2 Display board is probably at fault if m segments of the display are missing m the backlight does not operate To check the display power on the J17 without a sensor head attached and note whether all seg ments of the display are activated If the entire display is inactive or if the backlight does not operate proceed to Checking the Power Supply to rule out a problem with the power supply Checking the P
41. uct to the service center designated by Tektronix with shipping charges prepaid Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located Customer shall be responsible for paying all shipping charges duties taxes and any other charges for products returned to any other locations This warranty shall not apply to any defect failure or damage caused by improper use or improper or inadequate maintenance and care Tektronix shall not be obligated to furnish service under this warranty a to repair damage resulting from attempts by personnel other than Tektronix representatives to install repair or service the product b to repair damage resulting from improper use or connection to incompatible equipment or c to service a product that has been modified or integrated with other products when the effect of such modification or integration increases the time or difficulty of servicing the product THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU OF ANY OTHER WARRANTIES EXPRESSED OR IMPLIED TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE TEKTRONIX RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT SPEC
42. will be noticable differ ences For the best results when setting display color balance use the precise color coordinates of the crossing of the Planckian Locus by the desired color temperature For example x 0 318 and Y 0 332 is the location of D65 6500 K Do not use correlated color temperature alone Manual C 5 Appendix C Chromaticity Reference The 1976 CIE UCS Chromaticity Diagram The 1976 CIE UCS Uniform Chromaticity Scale dia gram shown in Figure C 4 can be used to categorize chromaticity measurements expressed as u v values u and v are related to the x and y values of the 1931 CIE chromaticity diagram by the following equations 4x 9y 10 3 TX 10 3 This diagram is similar to the 1931 CIE chromaticity diagram except for the following m Equal distances on the diagram represent approxi mately equal perceived color differences m The equal energy point is u 0 210 v 0 473 The primary disadvantage of the 1976 CIE UCS dia gram is that color mixtures cannot be determined easily from the coordinates and intensities of their compo nents Appendices Appendix C Chromaticity Reference Yellowish Greenish Orange Yellow Green vel Yellow Orange ellow F Green Yellow Yellowish Pink Reddish Orange 600 Green 500 Pink Red Bluish White Green Purplish 400 Pink Purplish Red 2 Greenish 3 Blue 8 Reddish
43. with a sensor having equal spectral sensitivity to the wavelengths being measured Glossary and Index Glossary Radiant Intensity The radiant flux through a unit of solid angle Usual ly measured in watts steradian with a sensor having equal spectral sensitivity to the wavelengths being measured Radiometry The measurement of radiant power A radiometric sensor is equally sensitive to all wavelengths pres ent in the light being measured Reflectance Factor The ratio of reflected light to received light on a surface Tristimulus Values X Y Z The amounts of each of three color primaries required to match the color of a light J17 Instruction Manual G 3 Glossary Glossary and Index A AC Adapter 1 9 Accessories 1 3 optional 7 6 A 1 ordering 7 1 standard 7 6 ALT DISP button 2 1 B Backlight intensity adjust 2 3 BACKLIGHT button 2 BAT icon 1 8 2 2 Battery adapter 1 9 low battery warning 7 8 replacement 1 8 type 1 7 Buttons ALT DISP 2 1 BACKLIGHT 2 1 COLOR 2 1 HOLD 2 7 RANGING 2 7 UNITS 2 1 J17 Instruction Manual index C Cable RS 232 3 1 Calibration 1 5 6 2 See also Performance Verification Characteristics See Specifications Chromaticity C 1 1931 CIE diagram 2 C 3 1976 CIE UCS diagram C 6 complimentary colors 2 Kelly chart C 2 tristimulus values 8 XYZ values C 8 Cleaning See Maintenance Color correct
44. y qualified personnel To avoid injury do not perform any servicing other than that stated in the operating instructions unless you are qualified to do so Refer to all Safety VM Performance Verification Performance Verification Performance verification procedures are included in the manual shipped with the J1800 series sensor heads NOTE The J1810 chromaticity sensor will not work with the J17 The J1810 sensor will only work with the J18 LumaColor II photometer If the sensor and photometer do not pass the perfor mance verification contact your local Tektronix repre sentative for support J17 Instruction Manual 5 1 Performance Verification Performance Verification Maintenance Maintenance The J17 Photometer and J1800 Series heads do not require periodic maintenance Clean the instrument case and sensors as directed in the Cleaning section If the J17 Photometer or one of the J1800 Series sensor heads does not appear to function correctly the information in this section will help you isolate the problem Basic Troubleshooting lists some operating condi tions to check for if you believe the J17 or the sensor head is not operating correctly Board level Troubleshooting will allow you to isolate most problems to one of the two replaceable circuit boards in the J17 Use these procedures if you want to repair the J17 yourself Cleaning Instrument Cleaning Clean the instrument case by wi
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