BTS256-EF - Laser 2000 Medienserver
Contents
1. 0 0002 at 2000cts peak output Ax Ay uncertainty Standard illuminant A 0 002 LED 0 004 CCT Measurement range 1700 to 17000 K ACCT Standard illuminant A 50K LED to 4 depending on the LED Spectrum Color rendering index Ra and R1 to R15 Microprocessor 16Bit 25ns instruction cycle time Charging voltage oVDC 450mA per USB Interface USB2 Mini USB Port Temperature Operation 10 to 30 C Storage 10 to 50 C Housing Splashproof Transport case Dimension weight 159 x 85 x 45mm LBH 500g Plastic hard top casing 333 x 280 x 70mm 6509 BTS256 EF data sheet Gigahertz Optik GmbH D 82299 Tuerkenfeld www gigahertz optik com Page Integration Sampling Upper Lower Frequency measurement FFT frequency time Rate cut off fre cut off fre uncertainty at acceptable Resolution quency quency S N ratio mm me ee mem Dmm me wu we o ume mae ume e Wee 1000ms 320us 0 6kHz 4Hz 1 0 5Hz 1 6Hz Effect of the photodiode s integration time on the cut off frequency 1 00E 02 __________ gt 1 00 01 min wire Counts S N 70 bei T max Integrationsz eit 1 00 00 ee von 30s amp 1 00 01 Lt E m2. 1 otandard version BTS256 E WIFi 102919 Additional to the BTS256 E WiFi interface BTS256 EF WIFi 102939 Additional to the BTS256 EF WiFi interface 5256 102947 Additional to the BTS256 E PAR effective function input function addi tional actinic spectral functions BTS256 PAR WiFi 102948 Additional to the BTS256 PAR WiFi interface BTS256 EF data sheet Gigahertz Optik GmbH D 82299 Tuerkenfeld www gigahertz optik com
3. Page 1 BTS256 EF mobile light meter for photopic and scotopic illuminance EVE factor luminous color color rendering index luminous spectrum and flicker The BTS256 EF is a high quality light meter that is well suited for illuminance and luminous color meas urements in all application areas thanks to its compact design high quality light sensor and precise cosine field of view function Another special feature of the device is its ability to perform flicker measurements BiTec light sensor for complex light measurements One of the outstanding properties of this mobile light meter is its BiTec light sensor This combines the characteristic properties of a silicon photodiode with those of a noise free CMOS diode array The BiTec sensor guarantees extremely precise photometric and spectral radiometric measurement values over a large dynamic range through mutual correction of the meas urement signals of both sensors Silicon photodiode detector fast and linear When taking into account the dynamic range linearity and speed silicon photodiodes have always been and are still the ultimate radiation detectors A silicon photodiode is therefore integrated in the BiTec light sensor of the BTS256 EF light meter Its matching to the photometric V A responsivity is improved by correction with the spectral measurement data of the diode array The photodiode is be used to determine the frequency of modulated light and thus evaluate the flic
4. ax Wim 2 Counts S M 3500 bei WER min Integrationsz eit on 5 2ms 1 00E 03 1 5 a 1 00 04 4 c f 350 450 550 550 750 W ellenl nge nm Typical spectral responsivity at different integration times BTS256 EF data sheet Gigahertz Optik GmbH D 82299 Tuerkenfeld www gigahertz optik com Page 8 __ 00 1 218i Pini Enc n eld pp E M I d ia H iini F ET LEETELELELLELLELE Tu LET oH He iue ii eei TONN it h Me TT Lo b qu LI E E ee ee Ee asucdsau soo Typical cosine field of view function zJ a angle Typical deviation of the cosine field of view function optik com www gigahertz D 82299 Tuerkenfeld Optik GmbH EF data sheet Gigahertz BTS256 Purchasing information Page 9 Model Item number Description BTS256 EF 102938 BTS256 EF user manual D or E S BTS256 user software CD USB cable for PC operation and battery charging using the PC USB power adapter EU USA or GB BHO 17 hard top casing S SDK BTS256 102777 Software Development Kit Software and handbook CD Recalibration K BTS256E I 301374 BTS256 E BTS256 EF recalibration with calibration certificate Other versions BI S256 E 102826
5. dard display showing the signal progression and signal frequency Standard display showing the illuminance and flicker parameters BTS256 EF data sheet Gigahertz Optik GmbH D 82299 Tuerkenfeld www gigahertz optik com and integration time Pulse Width Modulated PWM LED lamps The fast photodiode of the BiTec light sensor enables the BTS256 EF to automatically synchronize itself to the frequen cy of lamps operated in PWM mode Precise cosine corrected field of view A cosine corrected field of view is absolutely necessary for illuminance measurement devices For extended illuminance setups the cosine goodness of fit has significant influence on the measurement uncertainty of the light meter The BTS256 EF light meter is equipped with a diffuser window that has a 20mm diameter whose cosine matching ensures an f2 lt 3 uncertainty which corresponds to the DIN 5036 requirements for the quality class B Both detectors of the BiTec light sensor are centrally aligned behind the diffuser window and therefore have the same view angle DIN quality class A and B luxmeter Through the cutting edge Bi Technology sensor concept use of modern electronics online dark signal adjustment and the possibility to perform temperature compensation the device meets the conditions specified for two of the DIN 5036 quality classes e n terms of the f2 uncertainty i e lt 3 the device corre sponds to the quality class B DIN 5032 sectio
6. ellation can easily be saved for future use Software Development Kit Gigahertz Optik offers programmers the S SDK BTS256 E Software Development Tool This can be used with LabView from National Instruments NET from Microsoft and C C The SDKs simplify integration of the BTS256 E in an internally developed software Page 4 Socket with tripod thread Hard top casing for safe transport and storage of the BTS256 E and accessories El 5075256 vo o1 jCtemp est database mew net saved F r View Dewirri Task T SS Lassen Lucas itj 144 1 shart stop ada bo container trem single meaunement dor 23 5 5256 1931 Y 1 S BTS256 user software with modular setup desktop BTS256 EF data sheet Gigahertz Optik GmbH D 82299 Tuerkenfeld www gigahertz optik com Page 5 19 5 67526 spectrum 1 The graphical display module can be zoomed to full screen BTS256 EF data sheet Gigahertz Optik GmbH D 82299 Tuerkenfeld www gigahertz optik com Specifications Light meter Page 6 DIN class B DIN 5032 part 7 DIN class A for f1 u f3 and f4 DIN 5032 part 7 Light sensor Bi Technology Sensor with a photodiode broadband sensor and a 256 pixel CMOS diode array Integrated aperture for automatic dark signal adjustment Input optic Br
7. es Observer Settings 2 Diode Messure Time 100ms Diode COREL E SUE Lon Ha Diode Offset DComrensation Diode Atz Correction Logger DiodetHrras Clock Loader Diode Clock Auto Auto E Data Index 0 1 27 Switch Off SOM ackliaht Off 4n amic 1 s 10m The measurement parameters protocol is saved toge ther with a measurement data file BTS256 EF data sheet Gigahertz Optik GmbH D 82299 Tuerkenfeld www gigahertz optik com Protective cap with chain The protective cap for the diffuser window is attached onto the device Use without PC The BTS256 EF has all the necessary functions enabling free operation of the device without having to depend on a com puter Furthermore the rechargeable batteries have a ty of more than 8 operation hours The USB power adapter enables recharging of the device without a PC Use with PC The BTS256 E has a USB2 and WiFi interface The USB interface enables both data exchange and battery charging User software The S BTS256 E software included in the device s price pro vides all the necessary functions for the measurements measurement data display and data transfer The cutting edge flexible desktop concept of the software offers the user an individual constellation of the required measurement val ues This can be a full screen filled with lux measurement val ues or a matrix with both numerical and graphical fields Each desktop const
8. ker risk Flicker measurement Flicker measurement entails identification of a possible AC component of the light signal with a 5kHz bandwidth Besides the flicker frequency other flicker parameters i e Flicker per cent and flicker index are also displayed The device addition ally performs a Fast Fourier Transformation so as to display other frequency components in the signal For more details see the technical article on flicker measurements under www gigahertz optik de 226 1 Flicker measurment with BTS256 EF html Diode array detector for spectral measurement data The CMOS diode array of the BiTec Light sensor provides precise measurement data required for the luminous spec trum This data is then used for calculation of the color values and scotopic illuminance as well as for optimization of the pho tometric responsivity Optimized Signal to Noise Ratio The noise signal from diode array detectors has significant effect on the signal to noise ratio SNR and hence on the quality of the measurement signal as well A remote controlled aperture in the BiTec light sensor enables online compensa tion of the dark signals that are dependent on the temperature LL LI i q ave a s mre uem o v r2 1 2248 ix OY SS 1117117 Compact splashproof light meter with flicker measure ment function for mobile use Stan
9. n 7 e n applications where limitation of the viewing angle is ac ceptable the BTS256 EF with its f1 u and f4 val ues corresponds to the quality class A DIN 5032 section 7 Diverse photometric and colorimetric measurands A much broader diversity of measurands as the one offered by conventional light meters is required for verification and testing of LED lamps The BTS256 EF offers fourteen measurands and thereby meets all the requirements for a modern light meter Ep photopic illuminance Es scotopic illuminance Es Ep ratio of night and daylight vision EVE Equivalent Visual Efficiency factor Ee irradiance spectral irradiance x y CIE 1931 color coordinates u v CIE 1976 color coordinates CT color temperature Au deviation from the blackbody locus dominant wavelength intensity wavelength os Spectral half width Purity color purity Page 2 Standard display showing frequency components de termined through Fast Fourier Transformation Light meter with precise cosine field of view function E amp Scotoric Fhotaoric EO ers 623 6 lx 034 7 1 1 3011 0 9431 C EVE Data Index 0 Display showing the scotopic and photopic illuminance and the S P ratio as per IES TM 24 13 BTS256 EF data sheet Gigahertz Optik GmbH D 82299 Tuerkenfeld www gigahertz optik com e CRI Ra and R1 to R15 Colo
10. oadband Sensor Diffuser window with 20mm diameter cosine corrected field of view F2 Error lt 3 Silicon photodiode with photometric correction filter 1 lt 6 f1 A z corrected lt 3 Transimpedance amplifier with adjustable integration time from 100us to 6s Seven 7 measurement ranges with offset correction 16 Bit ADC Maximum measurable illuminance value 2199 999 Ix Noise equivalent illuminance value lt 0 011 Calibration uncertainty of photopic Illuminance 2 2 Flicker measurands Frequency Index Percentage Measurement Range OHz 5kHz Uncertainty 196 0 5 Hz at sufficient S N e g 100Ix at max frequency 5kHz For more information see www gigahertz optik com Spectral sensor CMOS diode array spectral radiometer Spectral range from 380 to 750nm Pixel reso lution 1 5nm Optical resolution 10nm 5 2ms to 30s integration time manual or automatic control Automatic shutter for dark signal measurements with an integration time similar to that of the bright measurement Shutter on off response time 100ms Measurement time by 199 999 Ix x 5ms white light Measurement time by 100 Ix lt 1s white light Scotopic measurement range spectral 1 to gt 199999 Ix Calibration uncertainty of scotopic 2 2 Color measurement range spectral 1 to gt 199999 Ix Peak wavelength 1nm Dominant wavelength 1nm Ax Ay reproduce Standard illuminant A 0 0001 LEDs
11. r Rendering Index Display modes for standard measurements The BTS256 EF Bi Tec sensor luxmeter has several display modes where the necessary measurands for the common photometric measurements are incorpo rated The cursor buttons can be used to switch be tween the displays User display modes The BTS256 EF enables users to individually config ure and save display modes The required measur ands can hereby be selected Info display for measurement parameters An incorporated Info Display shows all the relevant measurement parameters Easy operation and handling Three control buttons and the diligently structured menu navi gation make the device easy and safe to operate the device For instance in the standard measurement mode the user does not have to manually set the measurement parameters since these are automatically and perfectly adjusted to match the measurement conditions In the expert mode the user has access to all measurement parameters Many useful extra functions Ifthe user wants to distance himself from the device s field of view he she can set a time delayed measurement o The display can automatically be dimmed during the measurement o An acoustic signal can be set to mark the end of a meas urement o A layout created using a PC with the support points for the single measurements can be adopted in the device for measurement of the illuminance distribution The meas urement points can be progressi
12. vely processed and saved 9 Fast data logger measurement mode where time clocked readings of the photodiode can be recorded at a maxi mum measurement rate of up to 100ms o A second data logger measurement mode that enables time clocked recording of all measurands including the spectral measurement data o Dateand time in real time can also be set Tripod mount The measurement device has a tripod stand socket on the bottom side Other standard displays E 5347 Ix Data Index Spectral illuminance Ix 534 7 lx Dats Ind Protea illuminance Page 3 Series E TIT E 30 750n4 Data Index O Spectral irradiance W m 1683 mbm E SooLorp1cl m BSX 695 6 lx Data Index 0 Scotopic illuminance x ET Puritu B u ALI CT 672 E 534 7 lx E 534 7 lx x 2 4396 0 2504 4086 675255 CT 2990 ouv 0 0013 Purity 0 5460 CT 2990K Data Index 0 Data Index 0 x y color coordinates color coordinates CRI Data x 67x EM EDO Ery di R2 Ba 292215 96 11 80 0 7828 R4 81 12 74 80 p13 81 Z 0 2908 R6 86 14 98 R7 85 R15 73 Data Index O index 0 Color Rendering Index Normal color values EL Array Signal Rezolution Low Array Exposure Time Mode Pre Measure Arrays Act ExrPozure Time 0 3335 Arras Max Exposure Time 10 000s Shutter Function Active Array Scale to Diode Y
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