Yokogawa 510 Series Light Meters Manual PDF
Contents
1. Command Description HD Sets whether to include a header in measured data sent from the lux meter to the PC Ic Enables or disables the comparator during the measurement of totalized intensity of illumination IL Reads the totalized intensity of illumination and time Is Starts and stops the measurement of the totalized intensity of illumination KC Selects the user area number of the color correction factor KS Enables the color correction factor LD Selects how to send data from the lux meter to the PC PO Enables automatic power off RA Sets auto range mode RD Requests to send measured data RH Sets the range hold function RS Checks unsent measured data in buffer TM Sets the transmitted delimiter IM 51011 01EN 37 13 3 Detailed Description of Commands Cc 51011 rer mand 51012 51021 Description HD Yes Yes Sets whether to include a header in measured data sent from the lux meter to the PC Set whether to include a header HDm lt delimiter gt m 0 no header 1 with header default Response O lt delimiter gt IC Yes Enables or disables the comparator during the measurement of totalized intensity of illumination Use the comparator IC m lt delimiter gt m 0 OFF 1 ON Note This applies only during the measurement of totalized intensity of illumination Response IC m lt delimiter gt m 0 successful 1 error IL Yes2. FRA UTRA SPAS WRB R MIGRANTS RM AR Ta Pe eel BRA OMRMERRIR FE RNR ERIE SHRM WS AE AAAS IM 51011 01EN 55
3. 0 60 50 40 30 20 10 0 10 20 30 40 50 60 70 80 Angle of oblique incidence IM 51011 01EN 51 21 Illuminance Measurement Method Extract from the JIS C 7612 standard For general lighting illuminance of a horizontal surface is typically measured and averaged Unless otherwise specified the height of the measured surface shall be within 85 cm from the floor 40 cm from the tatami floor in the case of a Japanese style room or the surface of the floor or ground in the case of a corridor or in outdoors if it is difficult to measure the illuminance on the floor or ground the height shall be within 15 cm from the floor or ground The location for measurement shall be divided into equal areas by vertical and horizontal partitioning lines and the average illuminance for each area shall be calculated The calculated average of the areas shall be the average illuminance of the total area measured There are two methods to determine the average illuminance for each area the 5 point method and 4 point method JIS Japanese Industrial Standards 5 point method The middle of each side the m point and the center of gravity the g point shall be measured to obtain illuminances Em and Eg and then the average illuminance for each area shall be determined according to the following expression 1 Eo 4 Em Em2 Ems Em4 2Eg 5 Em 2Eg m4 52 IM 51011 01EN IM 51011 01EN 4 point method The 4
4. Light detecting surface Main unit Turns the power on and off Keys Hand strap USB port mini B type Use the USB cable to communicate to the PC and supply power IM 51011 01EN 10 Keys 51021 51011 51012 single function model POWER RANGE eS res e gt POWER ON OFF RANGE T H RANGE Key Use this key to switch the range Press the key to switch to manual range mode The range changes each time you press the key To return to auto range mode hold the key down for at least 1 second T H Key Use this key to set the timer hold time or start the timer CALL Key Use this key to view settings Values shown below that are relevant to the measurement function that you are using are displayed while you hold the key down Color correction factor intensity measurement distance high and low comparator limits and ripple ratio Al Key Use to display deviation Press the key to display the deviation or percentage of measurement data in reference to a reference value To return to the normal luminance measurement hold the key down for at least 1 second K Key Use this key in color correction measurement Color corrected results are displayed A switch is made between normal measurement and color correction measurement each time you press this key You can also set the color correction factor IM 51011 01EN AVG Key Use this key in average illumin
5. Reads the totalized intensity of illumination and time Read the totalized intensity of illumination and time IL lt delimiter gt Response IL mmmEsn ttttt t lt delimiter gt m mantissa of totalized value 3 digits 000 to 999 sn exponent of totalized value 2 to 3 t integral time 00000 0 to 10000 0 h IS Yes Starts and stops the measurement of the totalized intensity of illumination Start totalized intensity of illumination IS m lt delimiter gt m 0 OFF 1 ON Response IS m lt delimiter gt m 0 successful 1 error 38 IM 51011 01EN KC Yes Selects the user area number of the color correction factor Select the user area KC mm lt delimiter gt m 01 to 20 Response KC m lt delimiter gt m 0 successful 1 error KS Yes Enables the color correction factor Use the color correction factor KS m lt delimiter gt m 0 OFF 1 ON Response KS m lt delimiter gt m 0 successful 1 error LD Yes Yes Selects how to send data from the lux meter to the PC Select how to send LD m lt delimiter gt m 0 every measurement 1 every data request RD command default Response LD n lt delimiter gt n 0 command successful 1 command error PO Yes Yes Enables automatic power off Enable automatic power off PO m lt delimiter gt m 0 disable automatic power off 1 enable automatic power
6. and try again An error will occur in the following circumstances e If the illuminance of ambient light is greater than or equal to that of the fluorescent lamps Err 3 e If the AC component is extremely small or large compared to the illuminance to be calculated Err 0 The set ripple ratio is retained even when the power is turned off the ratio is retained until it is changed Ripple Measurement 1 Press S F S F appears and measurement starts To view the ripple ratio hold down CALL 2 To return to normal measurement press S F S F disappears IM 51011 01EN 35 13 Communication Functions 13 1 Cable Connection and Interface Specifications You can configure the lux meter from a PC and view settings and measured values through USB communications serial communication via a virtual COM port Installing the USB Driver To connect the lux meter to a PC you must first install the appropriate USB driver USB specifications Conforms to version 1 1 Download the driver from the YOKOGAWA s lux meter website http tmi yokogawa com products portable and bench instruments luxmeters digital lux meters Communication settings Baud rate 9600 bps Parity None Stop bits 2 bits Data length 8 bits Handshaking None Received delimiter CrLf Lf 0x03 any of the above is acceptable Transmitted delimiter CrLf Lf 0x03 default CrLf selected with a command 36 IM 51011 01EN 13 2 List of Commands
7. as a single single point light source you can set the distance from the light source to the measuring point and make the meter calculate and display the luminous intensity Luminous intensity cd illuminance Ix x distance m Set the distance to the measuring light source in advance Setting the Distance 1 Press SET and then cd SET m appears 2 Press A and gt to enter the distance from the light source under measurement to the reference plane of the lux meter The range is 00 00 to 99 99 m In unit of meter 3 Press SET SET m disappears and the setting is complete Measuring 1 Press cd cd appears 2 Face the light detecting surface of the lux meter towards the light source Take a measurement at the specified distance To view the distance that you have specified hold down CALL 3 Read the value 4 To return to normal measurement press cd cd disappears 28 IM 51011 01EN 10 Totalized Intensity of Illumination ACC Key This function is available on Model 51021 The meter calculates the totalized intensity of illumination and integral time The maximum totalized intensity of illumination is 9990000000 Ix h three significant digits and the maximum integral value is 10000 h In unit of hours If the comparator function is enabled and the totalized intensity of illumination reaches a preset value totalization stops at this point and the display is held You can read the integral time
8. display each time you press ACC h appears when the integral time is displayed 3 To pause totalization press HOLD D H appears and the integration of illuminance and time is paused To resume totalization press HOLD again If the comparator function is in use and the totalized value exceeds the limit value D H Hi appears and totalization stops The integral time is displayed 4 To view the limit value hold down CALL If the specified number of digits is greater than 7 the top and bottom digits are displayed alternately 5 To return to the normal illuminance measurement hold down ACC for at least 1 second Note If the totalized intensity of illumination or integral time reaches its maximum value totalization stops D H appears IM 51011 01EN 31 32 11 Comparator COMP Key This function is available on Model 51021 The comparator function determines whether the measured value displayed value is within the specified range greater than the high limit or less than the low limit Set the low limit Lo and high limit Hi to define the reference range The maximum number of digits available is 8 Of these digits 3 digits are significant and the rest are place holders fixed at 0 including 2 decimal digits The meter displays the comparison result Setting the Comparator Change 1 Press SET and then COMP SET COMP Lo appears Lo indicates the low limit 2 Set the low limit The top digit is displa
9. function is enabled AUTO POWER OFF is displayed IM 51011 01EN Releasing the Automatic Power Off Function Cover the light detecting surface with the cap Press the HOLD switch HOLD switch lock and then the POWER key to turn on the power After the initial display AUTO POWER OFF disappears and the automatic power off feature is released Press the HOLD switch again to release the HOLD state lock and perform measurements Reverting the Automatic Power Off Function Press the POWER key to turn the power off Cover the light detecting surface with the cap Check that the HOLD switch is not locked Press the POWER key again to turn on the power After the initial display AUTO POWER OFF appears and the automatic power off function returns IM 51011 01EN 17 2 6 Notes on Illuminance Measurement To make accurate measurements note the following items e Before starting measurement turn on the light bulb 5 minutes and the discharge lamp 30 minutes beforehand e Set the position and angle of the light detecting surface accurately The measuring reference plane is shown below Measurement reference plane 35 mm 1 e Be careful that measurements are not affected by where you are and what you are wearing e For accurate measurements perform color correction with a color correction factor that corresponds to the spectral distribution of the light source under measurement and the relative spectral r
10. has the following measurement functions 51011 51012 Single function model Normal luminance measurement e Deviation display 51021 e Normal luminance measurement e Deviation display e Color correction luminance measurement e Average luminance measurement Comparator function e Light source luminous intensity measurement e Totalized intensity of illumination e Ripple measurement Only the color correction function can be used in combination with another function Operation of other measurement functions are not allowed except for the normal luminance measurement and color correction measurement screens 2 2 Turning the Power On and Off CAUTION Check that the meter operates normally 14 IM 51011 01EN Cover the light detecting surface with the cap and press the POWER key to turn on the meter The initial display appears All the LED elements will light and CAL will appear automatic zero adjustment mode Then the display shows the luminance measurement 0 00 Ix display 0 0 Ix appears on Model 51011 and 51012 If you press the POWER key again the meter will turn off See chapter 3 Normal IIluminance Measurement and section 17 1 Error Messages 2 3 Setting the Response You can set the response speed of the light detector with the response selector switch Set the switch to FAST or SLOW according to your application Switch Response Appl
11. oscilloscope and use the recorder output function to record illuminance trends or observe light source waveforms Output Signal Specifications 999 mV 5 range fixed for full scale of each range Load resistance 100 KQ or more 1 Prepare a coated single core shielded wire and solder it to the recorder accessory output plug Connect the other end of the wire to the input of the monitoring instrument Soldered on the side Plug cover a Shielded wire Soldered on the side 2 Attach the cap turn on the lux meter and insert the plug into the recorder output connector REC R H appears and the range is fixed manual range mode The automatic power off function is disabled and AUTO POWER OFF disappears 3 Set the RESPONSE switch to FAST 4 1 mV of output voltage corresponds to a value of 1 in the least significant digit of the three significant digits Set the appropriate range For details on setting the range see chapter 6 Range Hold 5 Cover the light detecting surface with the cap and adjust the zero level of the monitoring instrument Remove the cap and start measuring IM 51011 01EN 41 15 Separating the Light Detector You can separate the light detector from the main unit for use Use the dedicated light detector extension cable sold separately 1 Turn off the power 2 Press the eject button to release the lock and separate the light detector from the main unit 3
12. point method is used when the variation in the illuminance is small The four corners the i points shall be measured to obtain illuminance Ei and then the average illuminance for each area shall be determined according to the following expression 1 1 Eo a Ei1 Ei2 Eis Eia 7 2Ei i1 i4 If you use Model 51021 measurements using the 4 point and 5 point methods are easy See chapter 7 Average Illuminance There is another method in which the average illuminance of multiple partitioned areas can be determined directly For details see JIS C 7612 53 54 IM 51011 01EN 22 Measure for Administration of the Pollution Control of Electronic Information Product of China The following are the provisions of Measure for Adminisration of the Pollution Control of Electronic Information Product of China They are applicable only in China mPhASALMALLANARRAS ABBAS RATER BBE A AR ta TNR SRA SRO ES che Gd Cr VI PBB aR BR ams ASSY O RBM MAY aa bHASA SWRA BME SJ T 11363 2006 rE PA MERIRELT x RRM EDM RTS RARA SANTA SJ T 11363 2006 IREM ALE BPRS ER lt H gt 91001 91002 vere Ce x _ seas assy x case x Ee cpu ARREA F 2006 2 A 28 Ath RFS SRSA UR SJ T 11364 2006 E FARRAH PAA ERE RENE SHER AV ARF A a AE RE A BR RECT MAAVREREE SSM ABSA
13. temperature environment 10 C to 0 C may slow down the display s response e Avoid using the meter in a dirty or dusty environment or in an environment with salt or corrosive gases e Do not wipe the meter with organic solvents Dirt or dust adhering to the light detecting surface of the meter decreases measurement accuracy Wipe the surface clean with a soft dry cloth Do not separate the light detector from the main unit with the power on IM 51011 01EN Conventions Used in This Manual Notes and Cautions The notes and cautions in this manual are categorized using the following symbols A Improper handling or use can lead to injury to the user or damage to the instrument This symbol appears on the instrument to indicate that the user must refer to the user s manual for special instructions Calls attention to actions or conditions that could cause serious or fatal injury to the user and precautions that can be taken to prevent such occurrences CAUTION Calls attention to actions or conditions that could cause light injury to the user or cause damage to the instrument or user s data and precautions that can be taken to prevent such occurrences Note Calls attention to information that is important for the proper operation of the instrument IM 51011 01EN Measurement Category WARNING e Do not use the meter for measurements in locations falling that fall under Measurement Categories Il Ill and
14. IV e Do not use the meter to measure voltage or current The meter is designed for measurement category I EN 61010 1 2001 Measurement Category CAT III IM 51011 01EN Description For measurement performed on circuits not directly connected to MAINS CAT I EN 61010 1 2001 For measurement performed on circuits directly connected to the low voltage installation For measurement performed in the building installation For measurement performed at the source of the low voltage installation Circuits not connected to a mains power source Appliances portable equipment etc Distribution board circuit breaker etc Overhead wire cable systems etc Contents Checking the Contents of the Package Safety Precautions ss casai misaia wee actin Se dhe Conventions Used in This Manual Measurement Category 000 eee eee eae 1 Component Names and Functions 2 Before Operations a dst sees and se PAs gong aah ai eels 2 2 1 Measurement Functions 0 2 2 Turning the Power On and Off 2 3 Setting the Response 20005 2 4 Checking and Replacing Batteries 2 5 Automatic Power Off 0000 2 6 Notes on Illuminance Measurement 3 Normal Illuminance Measurement 4 Color Correction Measurement K Key 5 Timer Hold HOLD
15. Insert the extension cable connector the end with the eject pin to the main unit and check that it is locked in place 4 Connect the other end the end with the Logo to the light detector and check that it is locked in place 5 Turn on the power and start measuring To disconnect the extension cable press the eject button to release the lock first Extension cable Extension cable Main unit eject button eject button 16 Supplying Power through USB You can supply power through USB 5 VDC 5 from external by connecting a off the shelf USB cable mini B type to the USB port of the lux meter Note You can supply power through USB even when batteries are installed 42 IM 51011 01EN 17 After Sales Service 17 1 Error Messages Errors when setting the ripple ratio Err 0 Err 3 see chapter 12 Ripple Measurement If any of the following errors occur repair may be necessary Err 1 Light detector error Err 2 Offset error Err 4 Main unit memory error If the error persists even after checking the following items repair is necessary e Is the light detector securely connected to the main unit is the eject pin locked correctly e Was the cap attached properly during zero adjustment e Was the cap broken during zero adjustment e Is the battery voltage appropriate Does Err 2 occur even when the batteries are replaced with new ones 17 2 Calibration If repair or calibration is necessar
16. N 19 Characteristics of Relative Visible spectrum Response The visible spectrum of light for human beings is from approximately 360 nm to 830 nm Even within this narrow range the sensitivity to light varies greatly depending on the wavelength This phenomenon is called the standard spectral luminous efficiency and is indicated by V A The characteristics of relative visible spectrum response of lux meters play an important role in illuminance measurement It is important to approximate the relative visible spectrum response to V A These characteristics are stipulated in engineering standards JIS C 1609 2 for certified lux meters and JIS C 1609 1 The relative spectral response of an illuminance meter S A is measured at 5 nm intervals for 95 wavelengths to calculate the deviation f1 from V A This method of evaluation is based on the performance evaluation of the Commission Internationale de Eclairage International Commission on Illumination CIE There are various light sources such as white light fluorescent lamps and mercury lamps on the market Normally the relative spectral response of a lux meter is slightly off from V A So when a light source with a different spectral distribution than the source that was used to calibrate the lux meter is measured the readings will be slightly off IM 51011 01EN 49 50 The color correction factor is used to correct this error To make accurate measurements we recomme
17. SSS SS SS SS SSS User s 51011 51012 51021 Manual Digital Lux Meter Keep this manual in a safe place so that you can refer to it when necessary YOKOGAWA IM 51011 01EN Yokogawa Meters amp Instruments Corporation 2nd Edition Oct 2013 YMI Thank you for purchasing the digital lux meter This user s manual primarily explains the handling precautions and basic operations of the digital lux meter To ensure correct use please read this manual thoroughly before beginning operation After reading this manual keep it in a safe place Notes The contents of this manual are subject to change without prior notice as a result of continuing improvements to the instrument s performance and functionality The figures given in this manual may differ from the actual screen Every effort has been made in the preparation of this manual to ensure the accuracy of its contents However should you have any questions or find any errors please contact your nearest YOKOGAWVA dealer Copying or reproducing all or any part of the contents of this manual without the permission of YOKOGAWVA is strictly prohibited Trademarks e Adobe Acrobat and PostScript are either registered trademarks or trademarks of Adobe Systems Incorporated e In this manual the and TM symbols do not accompany their respective registered trademark or trademark names e Other company and product names are registered trademarks or trademarks of their
18. ance measurement To return to the normal illuminance measurement hold the key down for at least 1 second 1 2 3 4 and C Keys Use this key in average illuminance measurement You can store location data for the 4 point method and 5 point method Location number display COMP Key Use this key to set the high and low comparator limits and to start the comparator function To return to the normal illuminance measurement hold the key down for at least 1 second cd Key Use this key to set the light intensity distance and to display the intensity A switch is made between normal measurement and light source intensity measurement each time you press the key ACC Key Use this key to set the limit for the totalized intensity of illumination and to display the integral time and integral value To return to the normal illuminance measurement hold the key down for at least 1 second S F Key Use this key in ripple measurement A switch is made between normal measurement and ripple measurement each time you press the key SET Key Use this key to configure various settings Key and Key Use these keys to move the setting position and change values IM 51011 01EN 11 Measurement reference plane indication Recorder output Tripod mounting screw connector Connect to a recorder or oscilloscope with a dedicated cable G Eject button J Used
19. and T H Keys 6 Range Hold RANGE Key 2 2 000 7 Average Illuminance AVG Key 8 Deviation Display A Key 0000 9 Light Source Luminous Intensity cd Key 10 Totalized Intensity of Illumination ACC Key 11 Comparator COMP Key 2022000000 12 Ripple Measurement S F Key 045 13 Communication Functions 000 13 1 Cable Connection and Interface Specifications 13 2 List of COMMANAS g 655 5 scenes eae we 13 3 Detailed Description of Commands 14 Recorder Output Analog Output 15 Separating the Light Detector 16 Supplying Power through USB 17 After Sales Service csi cca es ede oe eae ee ears 17 1 Error Messages 00020 eee eeeee IAZ Calibration a E EEE 18 Specifications sra sae sate des oda a a ewe 19 Characteristics of Relative Visible spectrum Response 20 Characteristic of Oblique Incident Light 21 Illuminance Measurement Method 22 Measure for Administration of the Pollution Control of Electronic Information Product of China IM 51011 01EN 1 Component Names and Functions Cap Protects the light detecting surface Used also during automatic zero adjustment Light detector Can be separated from the main unit using an extension cable
20. ated using the 4 point or 5 point method See chapter 3 Normal IIluminance Measurement The meter can save the measured values of up to five measurement points When the measurement of all the points is complete the meter calculates the average illuminance and displays the result Measuring 1 Press AVG AVG MEMO appears 2 In accordance with the description in chapter 22 IIluminance Measurement Method measure the illuminance of location 1 and press 1 The measured value is stored Location number 4 point method 5 point method 3 Repeat step 2 at each of the locations For the 5 point method measure the illuminance at the center of the room median point and press C You can measure the locations in any order The display shows the numbers of the locations in which values are stored after AVG MEMO If you press a number key for a location in which a value is stored the value will be overwritten If you hold down a number key for a location in which a value is stored for more than 1 second the value is deleted and the location number disappears from the display IM 51011 01EN 25 26 4 After storing the measured values for all locations press AVG AVG appears and the calculated result average illuminance is displayed If you press AVG again AVG MEMO appears and you will be able to overwrite or delete measured values 5 To return to the normal illuminance measurement
21. e display for illuminance measurement 999 0 s for place holders Overrange display OL Low battery voltage display 4 Measurement cycle Twice per second Recorder output 999 mV 5 range fixed for full scale of each range Load resistance 100 kQ or more Automatic power off Disabled for totalized measurement and comparator measurement and when the recorder output plug is inserted approx 30 minutes after the last key activity Can be extended or disabled Operating temperature and humidity 10 C to 40 C 80 RH or less no condensation Storage temperature and humidity 25 C to 70 C 5 to 95 RH no condensation Measurement cycle Twice per second IM 51011 01EN 47 Safety standards EN 61010 1 2001 CAT Pollution degree 2 Indoor use Altitude 2000 m or less EMC standards EN 61326 1 Class B EMC Regulatory Arrangement in Australia and New Zealand EN 55011 Class B Group 1 Korea Electromagnetic Conformity Standard StS AUS SA IF Influence in the immunity environment 10 or less of range Recorder output 15 or less of range Cable condition Use a USB cable that is 3 m or less in length Power supply Two AA dry cells or power supply through USB Battery life Approx 40 h when using alkaline dry cells Input rating Battery 3 VDC 0 3 W USB 5 VDC 5 0 5 W Dimensions Approx 67 W x 177 H x 38 D mm Weight Approx 260 g including batteries USB port mini B type 48 IM 51011 01E
22. es of operation If the instrument is used in a manner not specified in this manual the protection provided by the instrument may be impaired YOKOGAWA assumes no liability for the customer s failure to comply with these requirements The following symbols are used on this instrument A Warning handle with care Refer to the user s manual or service manual This symbol appears on dangerous locations on the instrument which require special instructions for proper handling or use The same symbol appears in the corresponding place in the manual to identify those instructions Make sure to comply with the precautions below Not complying might result injury or death WARNING Use the instrument Only for Its Intended Purpose The lux meter is for measuring illuminances Do not use this meter for any other purpose Check the Physical Appearance Do not use the meter if there is a problem with its physical appearance Do Not Disassemble Only qualified YOKOGAWA personnel may disassemble this product Do Not Operate in an Explosive Atmosphere Do not use this meter in the presence of flammable gases or vapors Doing so is extremely dangerous IM 51011 01EN CAUTION e The meter is for domestic use Class B and meets the electromagnetic compatibility requirements e Do not drop the meter or strike it against hard objects e Avoid storing the meter in direct sunlight or in a humid environment e Using the meter in an low
23. escent lamps with the sunlight first measure the sunlight without the fluorescent lamps ambient light only second and take the difference However this method requires you to turn on and off the lamps at each measurement point wait for the lamps to stabilize each time they are turned on and so forth In other words this method takes trouble and time Another method is to measure all the measurement points first with the fluorescent lamps turned on then measure the same points with the lamps turned off second and then take the differences This method is disadvantageous in that taking measurements at the same location and height when the lamps are turned on and when they are turned off is difficult which results in errors IM 51011 01EN 33 Measurement Principle The lux meter can calculate the illuminance by using the AC component characteristics of the radiation of fluorescent lamps illuminating at the commercial power frequency The AC component is related to the DC component average value at a constant ratio ripple ratio The relationship between the ripple ratio and illuminance is shown below Total illuminance F i Ripoiera DC component Ld ofthe room Ambient light Lg ipple ratio AC component Lr AC component Lr AC component ripple Lr IA Florescent lamp DC component waveform average Ld Total illuminance of the room Ambient light Lg Thus the illuminance DC component Ld ca
24. esponse of the meter The meter has color correction factors for typical light sources You can also register up to 21 correction factors that you can use for color correction See chapter 4 Color Correction Measurement e When you measure for long period of time the zero point may change due to large changes in the ambient temperature In such a case turn off the power once and then turn it on again See the procedure in chapter 3 Normal IIluminance Measurement 18 IM 51011 01EN 3 Normal Illuminance Measurement Automatic Zero Adjustment 1 Cover the light detecting surface with the cap Check that the HOLD switch is not locked 2 Press the POWER key to turn on the power After all the elements light automatic zero adjustment is executed CAL is displayed When the adjustment is finished CAL disappears Initial display end The illuminance measurement 0 00 Ix display appears 0 0 Ix appears on Model 51011 and 51012 Note If the CAP display persists the cap may not be on correctly Put the cap on correctly The cap may be broken Starting to Measure 3 Remove the cap and start measuring AUTO POWER OFF tt x LAO RSPS 4 When you are finished measuring press the POWER key to turn off the power Cover the light detecting surface for protection Note If Err appears during measurement check that the light detector is connected correctly to the main unit and t
25. hat the cap is off and then start from the beginning See section 17 1 Error Messages IM 51011 01EN 19 20 4 Color Correction Measurement K Key This function is available on Model 51021 Each meter product is pre configured with color correction factors for standard illuminant A that have been calculated on the basis of the spectral distribution characteristics and relative spectral response characteristics spectral sensitivity for various light sources The meter automatically multiplies a color correction factor that has been selected according to what is being measured and displays the result In addition to the preset color correction factors you can set up to 21 user defined color correction factors These factors remain even when the power is turned off Indication Color correction symbol factor typical 1 Daylight fluorescent lamp 5 High pressure sodium vapor lamp 0 988 6 Standard light source B 0 996 7 Standard light source C 0 995 8 Equal energy source 400 to 760 nm wi 0 991 9 User area U1 to U21 User definition The color correction factors are calculated based on the relative spectral distribution values of JIS Z 8719 JIS Z 8720 and CIE No 53TC 2 lamps JIS Japanese Industrial Standards CIE Commission Internationale de l clairage International Commission on Illumination IM 51011 01EN Setting the Color Correction Factor 1 Press SET and then K SET K appear
26. he measured value at that point D H stops blinking To make another measurement press T H again 3 To release the timer hold press HOLD again D H disappears and the meter returns to normal measurement mode IM 51011 01EN 23 6 Range Hold RANGE Key You can switch between auto range and manual range modes In manual range mode you can specify a fixed range If measured values are known to be within a particular range you can use a fixed range to increase the meter response Range configurations 51021 51011 51012 0 00 to 9 99 0 0 to 99 9 0 0 to 99 9 0 to 999 0 to 999 00 to 9 990 0o to 9 990 000 to 99 900 000 to 99 900 0 000 to 999 000 0 000 to 999 000 The small zeros in the table are fixed they are for indicating digits Setting the Range 1 Press RANGE The range is set to manual range mode and is fixed at the current range R H appears 2 Press RANGE to set the range you want The range increases each time you press the key Pressing the key at the maximum range causes the range to be set to the minimum range 3 To return to auto range mode hold down RANGE for at least 1 second R H disappears Note ____ SSS To view the range during measurement cover the light detecting surface with the cap so that the illuminance is zero 24 IM 51011 01EN 7 Average Illuminance AVG Key This function is available on Model 51021 The average illuminance can be calcul
27. hold down AVG for at least 1 second All the stored values will be deleted Note To repeat average illuminance measurements we recommend that you return to normal illuminance measurement once or delete all stored data before making the next measurement To view the value of a location while the measured result is displayed hold down the number for the location IM 51011 01EN 8 Deviation Display A Key You can display measurement deviation Set a reference illuminance and the meter will display the deviation based on the reference There are two display modes Deviation value display A measured value reference value Percentage display deviation reference value x 100 Measuring 1 Measure the reference illuminance and then press A The measured value is stored as the reference value A R H appears and the measurement range is fixed Measured values are displayed as deviation values 2 Press A to change to the percentage display appears The display switches between deviation value display and percentage display each time you press A 3 To view the reference value hold down CALL 4 To return to the normal measurement display hold down A for at least 1 second Note If the measured value falls outside the measurement range OL will appear IM 51011 01EN 27 9 Light Source Luminous Intensity cd Key This function is available on Model 51021 If the light source can be regarded
28. ication position speed E FAST Approx Measurement of continuous light such as 10 ms daylight and interior lighting fluorescent lamps incandescent lamps The display shows RSPS i SLOW Approx Measurement of the average illuminance 500 ms Jof flickering lights or a light that varies over time such as that from a TV screen The display shows RSPS N Note If the recorder output is used for waveform observation set the switch to FAST IM 51011 01EN 15 2 4 Checking and Replacing Batteries When the battery voltage drops the display area shows a mark When this mark appears replace the batteries with new ones Turn off the power and remove the battery cover Check the polarity markings and insert the new batteries in the correct orientation Close the battery cover completely Battery type Two AA dry cells LP Battery Main unit 2 5 Automatic Power Off The meter has an automatic power off function to prevent unnecessary battery usage when you forget to turn off the power If there is no key activity for about 30 minutes the meter beeps twice and automatically turns off Pressing any key while the meter is beeping extends the time until the power turns off for another 30 minutes The automatic power off function is disabled while the totalized intensity of illumination or comparator function is being executed or when a plug is inserted in the recorder output connector When the automatic power off
29. lues which have been memorized before shipping according to its characteristics IM 51011 01EN 21 22 Holding Data HOLD Switch You can hold the measured value You can use this function when the measured value is hard to read such as when you are measuring in a dark place Measuring 1 Press HOLD to lock the switch The measured value is held and D H appears 2 To release the hold lock press HOLD D H disappears Timer Hold HOLD and T H Keys The timer hold function makes measurements holds the value after the specified time elapses If where you are or what you are wearing is going to affect the measurement you must move away from the meter This function enables you to set the time needed for you to move away from the meter so that you can make accurate measurements 51011 and 51012 timer setting 5 seconds fixed 51021 timer setting 000 to 999 seconds as specified Setting the Timer on Model 51021 1 Press SET and then T H SET D H S appears 2 Press A and gt to enter the time value The range is 000 to 999 seconds 3 Press SET to finish setting the timer SET D H S disappears The timer value will be memorized retained even if you turn off the power IM 51011 01EN Measuring 1 Press HOLD the switch will be held in the pressed state D H appears 2 Press T H to start the timer D H starts blinking When the specified time elapses the meter beeps and holds t
30. n be determined with the following equation Illuminance DC component Lr x Ripple ratio The ripple ratio must be determined in advance through the measurement of the total illuminance of the room and ambient light Lg The lux meter can use the ripple ratio and AC component measurements to calculate illuminance IM 51011 01EN Setting the Ripple Ratio The ripple ratio must be set prior to ripple measurements As long as the conditions remain the same same type of fluorescent lamp you do not have to reset the ripple ratio Fluorescent lamps are unstable immediately after they are turned on Set the ripple ratio after at least 30 minutes elapses after the lamps are turned on Select a location in the room where there is little ambient light and also directly below the fluorescent lamps Never move the lux meter during this procedure 1 Face the light detecting surface of the lux meter to the fluorescent lamps to be measured and then press SET and then S F The total illuminance will be measured After about 5 seconds appears 2 When L OFF appears turn off the fluorescent lamps 3 Press SET The ambient light will be measured After about 3 seconds appears When the ripple ratio is set properly the meter returns to normal illuminance measurement If Err appears the ripple ratio is not set If this occurs press SET to return to normal illuminance measurement change the location
31. nd that you correct the readings by multiplying the color correction factor of the light source under measurement The following figure shows the characteristics of the relative spectral response oO 7 A N o 0 Standard spectral luminous efficiency f Relative spectral o D response o P S N Relative spectral response 0 0 N 3 t 350 400 450 500 550 600 650 700 750 800 850 Wavelength nm IM 51011 01EN 20 Characteristic of Oblique Incident Light When reading a book at night the brightness differs between reading under a light and reading a little farther from the light In such a case you probably noticed that the book was easier to read when you faced the book toward the light If the angle between the incident light and the line perpendicular to the illuminated surface is defined to be 9 the illuminance of the surface is proportional to cos 8 This characteristic is standardized If the lux meter does not meet the standard illuminance of oblique incident light cannot be measured accurately The following figure shows the characteristic of oblique incident light Ny A ne Tolerance for Class AA 81 Ag c niet a o p n oe E m van o a p N 7 NI oO E a a tt
32. off Note If this command is received while totalized intensity of illumination or comparator measurement is in progress the command will be executed after the meter returns to normal measurement Response PO m lt delimiter gt m 0 successful 1 error IM 51011 01EN 39 RA Yes Yes Sets auto range mode Set auto range mode RA lt delimiter gt Response RA m lt delimiter gt m 0 successful 1 error RD Yes Yes Requests to send measured data Request to send RD lt delimiter gt Response RD m lt delimiter gt m 0 command successful 1 command error RH Yes Yes Sets the range hold function Set range hold RH m lt delimiter gt m 0 9 99 1 99 9 2 999 3 9 990 4 99 900 5 999 000 Model 51021 only Response RH m lt delimiter gt m 0 successful 1 error RS Yes Yes Checks unsent measured data in buffer Check RS lt delimiter gt Response RS m n lt delimiter gt m 0 command successful 1 command error n 0O no unsent data 1 unsent data available TM Yes Yes Sets the transmitted delimiter Set the delimiter TM m lt delimiter gt m 0 CRLF default 1 LF 2 0x03 Response O lt delimiter that was set before the TM command was received gt 40 IM 51011 01EN 14 Recorder Output Analog Output You can connect the lux meter to a recorder or
33. respective companies IM 51011 01EN 1 Revisions e February 2013 1st Edition e October 2013 2nd Edition 2ndEdition October 2013 YMI All Rights Reserved Copyright 2013 Yokogawa Meters amp Instruments Corporation Printed in Japan IM 51011 01EN Checking the Contents of the Package Unpack the box and check the contents before operating the instrument If the wrong items have been delivered if items are missing or if there is a problem with the appearance of the items contact your nearest YOKOGAWA dealer Digital Lux Meter Check that the product that you received is what you ordered by referring to the model name on the name plate MODEL Specifications 51011 JIS Class A Measurement ranges 99 9 999 9 990 99 900 999 000 51012 JIS Class AA Measurement ranges 99 9 999 9 990 99 900 999 000 51021 JIS Class AA Measurement ranges 9 99 99 9 999 9 990 99 900 999 000 51011 51012 Single function model Compliant standard JIS C 1609 1 2006 JIS Japanese Industrial Standards Standard Accessories AA size alkaline batteries 00 2 eee 2 Recorder output plug JCO17A 0 0000 e eee 1 Soft sided case RBO38A 00000 cee eee 1 User s Manual Japanese and English 2 Optional Accessories Sold separately Light detector extension 91001 IM 51011 01EN Safety Precautions The general safety precautions described herein must be observed during all phas
34. response Deviation from the standard spectrum luminous efficiency f1 within 6 Fatigue characteristics 1 Temperature characteristics 3 at 23 C reference and a range of 10 to 40 C Humidity characteristics 3 IM 51011 01EN 45 46 51021 Class Conforms to Class AA in JIS C 1609 1 2006 Measurement ranges 0 00 to 9 99 99 9 999 9 990 99 900 999 000 Ix automatic and manual range mode switching Linearity accuracy at 23 C 2 C Reading of 3000 Ix or less 2 of reading 1 digit Reading greater than 3000 Ix 3 of reading 1 digit Response time 5 sec or less in auto range mode 2 sec or less in manual range mode Characteristics of oblique incident light Deviation from the cosine law Angle 10 1 30 2 50 6 60 7 80 25 Characteristics of relative visible spectrum response Deviation from the standard spectrum luminous efficiency f1 within 6 Fatigue characteristics 1 Temperature characteristics 3 at 23 C reference and a range of 10 to 40 C Humidity characteristics 3 Ripple measurement Illuminance measurement of fluorescent lamps except for high frequency lighting in the daytime Measuring range 100 to 3000 Ix Accuracy at 23 C 2 C 7 of reading 1 digit IM 51011 01EN Common Specifications for 51011 51012 and 51021 Photoelectric element Silicon photodiode Display 7 digit liquid crystal display LCD with function and unit displays Maximum effectiv
35. s The light source symbol and color correction factor appear 2 Press A to select the color correction factor symbol that you want to set The light source symbol and color correction factor appear If you select a factor from U1 to U21 set any value up to 9 999 that you want Press gt and A to set the value 3 Press SET to apply the selected color factor The setting is complete SET K disappears The color correction factor will be retained even if you turn off the power Measuring 1 Press K K appears While K is displayed the meter multiplies the specified color correction factor to the measured value to show the illuminance 2 To view the color correction factor hold down CALL 3 To return to normal illuminance measurement press K again K disappears Note e The color correction measurement can be executed in combination with another measurement function However if another measurement function is already in execution color correction measurement is not possible In such a case return to normal illuminance measurement start color correction measurement and then the other measurement function Note that if color correction measurement is being executed with another function you cannot view the color correction factor The color correction factors on the previous page 1 FLd 0 994 to 8 Wt 0 997 are typical values Each meter product has its own color correction factors different from typical va
36. to separate a the light detector from the main unit 2 Hold switch Battery cover Response selector Holds the measured switch data reading Switches the light detector response speed between FAST and SLOW 12 IM 51011 01EN Display Va CALL Ne AUTO POWER OFF a ATA A A A T i t L AVG MEMO BABAG kses BE S SET K S F R H aint ieee J When every element is showing some elements are not used Element Description 8 8 8 8 8 8 8 Digital display of measured calculated and set values AUTO POWER OFF Lights in automatic power off mode 4 Deviation CALL Lights when CALL is pressed SET Lights in setting mode K Color correction factor RCD Lights when a plug is inserted into the recorder output connector S F Ripple measurement comP I es Gil R H Lights in comparator mode s in range hold mode s in data hold and timer hold modes s when the battery voltage is low AVG MEMO RSPS s during average illuminance Response setting Timer hold time unit seconds Unit for illuminance measurement Unit for integral time of totalized intensity of illumination Deviation display Unit for the distance to the light source IM 51011 01EN Unit for luminous intensity lights during light source luminous intensity measurement 13 2 Before Operation 2 1 Measurement Functions The meter
37. when totalization stopped To use the comparator function set the limit value Note If the battery runs low during long term totalization an error may be introduced in the calculation To perform long term totalization we recommend that you supply power through USB IM 51011 01EN 29 30 Setting the Limit Value Only When Using the Comparator The maximum number of digits available is 12 Of these digits 3 digits are significant and the rest are place holders fixed at 0 including 2 decimal digits A value is entered in two parts the top 5 digits and the remaining 7 digits 1 Press SET and then ACC SET Ix h appears 2 First enter the top 5 digits Use and gt to enter the digits one by one After entering the 5 digits press gt to switch the display to enter the remaining digits Use A and gt to set the limit value Example of how to set 1230000 wir t MILL L Display for setting L Display for setting the top digits the remaining lowest digits 3 After entering the value press SET SET disappears and the setting is complete IM 51011 01EN Measuring 1 Press ACC Totalization starts and lx h appears The automatic power off function is disabled and AUTO POWER OFF disappears To use the comparator function press COMP COMP Go appears Go indicates that totalization is in progress 2 The display switches between integral time display and totalized value
38. y contact your nearest YOKOGAWA dealer IM 51011 01EN 43 18 Specifications 51011 Class Conforms to Class A in JIS C 1609 1 2006 Measurement ranges 0 0 to 99 9 999 9 990 99 900 999 000 Ix automatic and manual range mode switching Linearity accuracy at 23 C 2 C Reading of 3000 Ix or less 4 of reading 1 digit Reading greater than 3000 Ix 6 of reading 1 digit Response time 5 sec or less in auto range mode 2 sec or less in manual range mode Characteristics of oblique incident light Deviation from the cosine law Angle 10 1 5 30 3 60 10 80 30 Characteristics of relative visible spectrum response Deviation from the standard spectrum luminous efficiency f1 within 9 Fatigue characteristics 2 Temperature characteristics 5 at 23 C reference and a range of 10 to 40 C Humidity characteristics 3 44 IM 51011 01EN 51012 Class Conforms to Class AA in JIS C 1609 1 2006 Measurement ranges 0 0 to 99 9 999 9 990 99 900 999 000 Ix automatic and manual range mode switching Linearity accuracy at 23 C 2 C Reading of 3000 Ix or less 2 of reading 1 digit Reading greater than 3000 Ix 3 of reading 1 digit Response time 5 sec or less in auto range mode 2 sec or less in manual range mode Characteristics of oblique incident light Deviation from the cosine law Angle 10 41 30 2 50 6 60 7 80 25 Characteristics of relative visible spectrum
39. yed so use A to set the number Press gt Set the remaining digits Use and gt to enter the digits one by one Example of how to set 1230 L Display for setting Display for setting the top digit the remaining lowest digits L 3 Press COMP The display for setting the high limit appears Set the high limit in the same manner as in step 2 Press COMP to switch between high and low limits 4 After entering the values press SET The setting is complete and SET disappears IM 51011 01EN Measuring 1 While normal illuminance measurement or color correction measurement is in progress press COMP The comparator function is enabled and COMP Lo COMP Hi or COMP Go is displayed The automatic power off function is disabled and AUTO POWER OFF disappears 2 To view the high and low limits hold down CALL The high and low limits are displayed alternately at 1 5 second intervals 3 To return to the normal illuminance measurement hold down COMP for at least 1 second COMP Lo COMP Hi or COMP Go disappears 12 Ripple Measurement S F Key This function is available on Model 51021 The ripple measurement function facilitates the measurement of indoor fluorescent lamps during the daytime When the illuminance of fluorescent lamps is measured with a lux meter during the daytime the sunlight influence is large A typical method to overcome this phenomenon is to measure the fluor
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