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IM 51011-01EN

16

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

Battery

Main unit

Battery cover

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 function is enabled,

[AUTO POWER OFF] is displayed.

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Содержание 51011

Страница 1: ...User s Manual 51011 51012 51021 Digital Lux Meter IM 51011 01EN 4th Edition Oct 2017 YMI Store this manual in an easily accessible place for quick reference ...

Страница 2: ...ent for Korea Contact information of Yokogawa offices worldwide is provided on the following sheet PIM 113 01Z2 Inquiries List of worldwide contacts 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 b...

Страница 3: ...nd PostScript are either registered trademarks or trademarks of Adobe Systems Incorporated In this manual the and TM symbols do not accompany their respective registered trademark or trademark names Other company and product names are registered trademarks or trademarks of their respective companies Revisions February 2013 1st Edition October 2013 2nd Edition May 2013 3rd Edition October 2017 4th ...

Страница 4: ...me 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 2 Recorde...

Страница 5: ... to the user s manual for special instructions WARNING 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...

Страница 6: ... 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 lu...

Страница 7: ...he meter in an low temperature environment 10 C to 0 C may slow down the display s response Avoid using the meter in a dirty or dusty environment or in an environment with salt or corrosive gases 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 th...

Страница 8: ...ption Remarks CAT I For measurement performed on circuits not directly connected to MAINS CAT I EN 61010 1 2001 Circuits not connected to a mains power source CAT II For measurement performed on circuits directly connected to the low voltage installation Appliances portable equipment etc CAT III For measurement performed in the building installation Distribution board circuit breaker etc CAT IV Fo...

Страница 9: ... 25 8 Deviation Display Δ Key 27 9 Light Source Luminous Intensity cd Key 28 10 Totalized Intensity of Illumination ACC Key 29 11 Comparator COMP Key 32 12 Ripple Measurement S F Key 33 13 Communication Functions 36 13 1 Cable Connection and Interface Specifications 36 13 2 List of Commands 37 13 3 Detailed Description of Commands 38 14 Recorder Output Analog Output 41 15 Separating the Light Dete...

Страница 10: ...and strap Keys 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 USB port mini B type Use the USB cable to communicate to the PC and supply power POWER key Turns the power on and off ...

Страница 11: ...elow 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 Δ 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 h...

Страница 12: ...or 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 h...

Страница 13: ...er Hold switch Holds the measured data reading Response selector switch Switches the light detector response speed between FAST and SLOW Eject button Used to separate the light detector from the main unit Recorder output connector Connect to a recorder or oscilloscope with a dedicated cable ...

Страница 14: ...actor RCD Lights when a plug is inserted into the recorder output connector S F Ripple measurement Lo Go Hi COMP Lights in comparator mode R H Lights in range hold mode D H Lights in data hold and timer hold modes Lights when the battery voltage is low 1 2 3 4 C AVG MEMO Lights during average illuminance S F RSPS Response setting S Timer hold time unit seconds lx Unit for illuminance measurement h...

Страница 15: ...nce measurement Average luminance measurement Comparator function Light source luminous intensity measurement Totalized intensity of illumination 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 Turni...

Страница 16: ...n 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 position Response speed Application FAST Approx 10 ms Measurement of continuous light such as daylight and interior lighting fluorescent lamps incandescent lamps The display shows RSPS F SLOW Approx...

Страница 17: ...atic 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 ...

Страница 18: ...nd 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 ...

Страница 19: ...ing 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 response 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 Correctio...

Страница 20: ...ent 0 00 lx display appears 0 0 lx 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 F RSPS AUTO POWER OFF lx 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 a...

Страница 21: ...er defined color correction factors These factors remain even when the power is turned off Light source type and name Indication symbol Color correction factor typical 1 Daylight fluorescent lamp FLd 0 994 2 White fluorescent lamp FW 0 996 3 Three way fluorescent lamp FL3 1 007 4 High pressure mercury vapor lamp HGL 0 993 5 High pressure sodium vapor lamp nAL 0 988 6 Standard light source B Stb 0 ...

Страница 22: ...alue 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 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 i...

Страница 23: ...fied 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 a...

Страница 24: ... T H to start the timer D H starts blinking When the specified time elapses the meter beeps and holds the 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 ...

Страница 25: ... 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 rang...

Страница 26: ...ance Measurement Method measure the illuminance of location 1 and press 1 The measured value is stored Location number 1 2 3 4 4 point method 1 2 3 4 C 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 w...

Страница 27: ...elete measured values 5 To return to the normal illuminance measurement 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 d...

Страница 28: ...nce illuminance and then press Δ The measured value is stored as the reference value Δ R H appears and the measurement range is fixed Measured values are displayed as deviation values 2 Press Δ to change to the percentage display appears The display switches between deviation value display and percentage display each time you press Δ 3 To view the reference value hold down CALL 4 To return to the ...

Страница 29: ...ng light source in advance Setting the Distance 1 Press SET and then cd SET m appears 2 Press and 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 ...

Страница 30: ...tegral 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 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 ...

Страница 31: ...e top 5 digits and the remaining 7 digits 1 Press SET and then ACC SET lx h appears 2 First enter the top 5 digits Use and to enter the digits one by one After entering the 5 digits press to switch the display to enter the remaining digits Use and to set the limit value Example of how to set 1230000 Display for setting the top digits Display for setting the remaining lowest digits 3 After entering...

Страница 32: ...ion 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 di...

Страница 33: ...ay Condition Hi high limit Hi measured value Go low limit Lo measured value high limit Hi Lo measured value low limit Lo 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 displayed so use to set the number Press Set the remaining digits Use and to enter the digits one by one Example of how to set 1230 Display...

Страница 34: ...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 fluorescent 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 measure...

Страница 35: ...ow Ripple ratio DC component Ld AC component Lr Ambient light Lg AC component Lr Total illuminance of the room Florescent lamp waveform DC component average Ld Total illuminance of the room Ambient light Lg AC component ripple Lr Thus the illuminance DC component Ld can be determined with the following equation Illuminance DC component Lr Ripple ratio The ripple ratio must be determined in advance...

Страница 36: ...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 and try again An error will occur...

Страница 37: ...ter 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 ...

Страница 38: ... 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 Ch...

Страница 39: ...0 OFF 1 ON Note This applies only during the measurement of totalized intensity of illumination Response IC m delimiter m 0 successful 1 error IL Yes Reads the totalized intensity of illumination and time Read the totalized intensity of illumination and time IL delimiter Response IL mmmEsn ttttt t delimiter m mantissa of totalized value 3 digits 000 to 999 sn exponent of totalized value 2 to 3 t i...

Страница 40: ...from the lux meter to the PC Select how to send LD m delimiter m 0 every measurement 1 every data request RD command default Response LD n delimiter n 0 command successful 1 command error PO Yes Yes Enables automatic power off Enable automatic power off PO m delimiter m 0 disable automatic power off 1 enable automatic power off Note If this command is received while totalized intensity of illumina...

Страница 41: ...nction Set range hold RH m delimiter m 0 9 99 1 99 9 2 999 3 9 990 4 99 900 5 999 000 Model 51021 only Response RH m delimiter m 0 successful 1 error RS Yes Yes Checks unsent measured data in buffer Check RS delimiter Response RS m n delimiter m 0 command successful 1 command error n 0 no unsent data 1 unsent data available TM Yes Yes Sets the transmitted delimiter Set the delimiter TM m delimiter...

Страница 42: ...ing instrument Shielded wire Plug cover Soldered on the side 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 th...

Страница 43: ...ocked 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 eject button Main unit eject button Eject pin Logo USB port Light detector Main unit Extension cable 16 Supplying Power through USB You can s...

Страница 44: ...ry error If the error persists even after checking the following items repair is necessary Is the light detector securely connected to the main unit is the eject pin locked correctly Was the cap attached properly during zero adjustment Was the cap broken during zero adjustment Is the battery voltage appropriate Does Err 2 occur even when the batteries are replaced with new ones 17 2 Calibration If...

Страница 45: ... greater than 3000 lx 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 characterist...

Страница 46: ...than 3000 lx 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 a...

Страница 47: ...ess 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 Il...

Страница 48: ...urement cycle Twice per second Recorder output 999 mV 5 range fixed for full scale of each range Load resistance 100 kΩ 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 conde...

Страница 49: ...onformity Standard 한국 전자파적합성기준 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 177 H 38 D mm Weight Appro...

Страница 50: ...racteristics 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 λ is measured at 5 nm intervals for 95 wavelengths to calculate the deviation f1 from V λ This method of evaluation is based on the performance evaluation of the Commission Internationale de l Eclairage International Commission on Illu...

Страница 51: ...adings by multiplying the color correction factor of the light source under measurement The following figure shows the characteristics of the relative spectral response 0 8 1 0 0 6 0 4 0 2 0 0 350 400 450 500 550 600 650 700 750 800 850 Wavelength nm Relative spectral response Standard spectral luminous efficiency Relative spectral response ...

Страница 52: ...tween the incident light and the line perpendicular to the illuminated surface is defined to be θ the illuminance of the surface is proportional to cos θ 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 80 70 60 50 40 30 20 10 0 ...

Страница 53: ...m 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 ...

Страница 54: ... average illuminance for each area shall be determined according to the following expression E0 Ei1 Ei2 Ei3 Ei4 Ei 1 4 1 4 i2 i3 i4 i1 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 ...

Страница 55: ...IM 51011 01EN 54 ...

Страница 56: ...质铅 Pb 汞 Hg 镉 Cd 六价铬 Cr VI 多溴联苯 PBB 多溴二苯醚 PBDE 框架塑料线路板 ASSY 电池 Plug JC017 表示该有害物质在该部件所有均质材料中的含量均在 GB T 26572 规定的限量要求以下表示该有害物质至少在该部件的某一均质材料中的含量超出 GB T 26572 规定的限量要求选购 91001 91002 框架塑料线路板 ASSY CABLE 环保使用期限该标识适用于 SJ T 11364 中所述在中华人民共和国销售的电子电气产品的环保使用期限只要您遵守该产品相关的安全及使用注意事项在自制造日起算的年限内则不会因产品中有害物质泄漏或突发变异而造成对环境的污染或对人体及财产产生恶劣影响注该年数为环保使用期限并非产品的质量保证期零件更换的推荐周期请参照使用说明书 ...

Страница 57: ......

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