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Guidelines / Manual

BTS256-LED Tester / Page 24

Version 01.2009-01

Specifications

BTS256-LED

Sensor Design

BiTec Sensor with fine photometric matching photodiode and 256 pixel CMOS photodiode array.
Integrated shutter for remote controlled offset compensation.

Integral Sensor

Integration time setting from 100µs to 6s. Nine (9) measurement ranges with correction range
transcending offset correction. 12Bit SAE ADC

Spectral response with fine CIE photometric matching

Luminous flux resolution 0.1mlm; Max luminous flux value 10000lm

Spectral Sensor

Integration time setting from 5.2ms to 60s. Shutter delay 100ms for open, 100ms for close

Spectral range 380 to 750nm. Pixel resolution 1.5nm. Other resolutions by interpolation or inte-
gration

Luminous flux measurement range (white light):

•

Minimum signal 100mlm [With 60s maximum integration time a flux of about 2mlm
(100mlm/60s) can be measured]

•

Maximum signal 2500lm (5.2ms integration time)

Wavelength peak +/- 1nm

Δ

x,

Δ

y +/- 0.005

Integrating Sphere

50mm diameter with ODM98 coating. Sealed window at sphere output port. Cone adapter with
rugged type ODP97 coating. Cone adapter measurement aperture diameter 10mm

White LED for use as auxiliary lamp. AUX LED delay 1ms. LED current peak max 350mA ca-
pacitance supported

Cone adapter ex-change effect /- 0.5%

Microcontroller

16Bit, 25ns instruction cycle time

Power

5VDC to 7VDC, 250mA peak during capacitance loading

Remote interface

RS232: 115200Baud, 8D, IS, N

Temperature

Operating: 10 to 30°C Storage: -10 to 50°C

Dimensions and Weight

160mm (6.3 in) L x 85mm (3.3) W x 60mm (2.4 in) H. Weight: 500g (1.1 lb)

xy DUT position error within cone adapter max. +/- 2%

z axis DUT position error within cone adapter max. +/-2% (1 to 11mm)

BTS256-LED sensitivity with add-on integrating spheres

UMBB-150

Integral sensor: 2.5mlm to 25000lm

1)

Spectral sensor: 41mlm to 65000lm

1)

Max measurement port diameter 50mm / 2 inch

UMBB-300

Integral sensor: 9mlm to 90000lm

1)

Spectral sensor: 150mlm to 230000lm

1)

Max measurement port diameter 75mm / 3 inch

UMBB-500

Integral sensor: 25mlm to 250000lm

1)

Spectral sensor: 410mlm to 650000lm

1)

Max measurement port diameter 125mm / 5 inch

1) Maximum measurable flux is not only limited by detector and amplifier dynamic range. Heat generated by the light source
under test can also limit measurement range. Stated specifications exclude range limitations caused by varying ambient con-
ditions!

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Содержание BTS256-LED

Страница 1: ...rtz optik com Gigahertz Optik Inc 5 Perry Way Newburyport MA 01950 4009 USA Tel 978 462 1818 Fax 978 462 3677 E mail b angelo gigahertz optik com www gigahertz optik com Operation Manual BTS256 LED Measurement Instrument for Luminous Flux Φ Spectral Distribution W nm and Color Data of LEDs Version 01 2009 01 ...

Страница 2: ...truments to others Gigahertz Optik GmbH Table of Contents Page 2 Table of Contents Page 3 4 General Information Warranty Safety Page 5 Product Specific Safety Information Page 6 8 About LED Measurements Page 9 10 BTS256 LED Tester Description Page 11 BTS256 LED 150 300 and 500 Tester for Large Size LEDs Page 12 20 G O O S Software for BTS256 LED Remote Control Measurement Device Set up Page 12 13 ...

Страница 3: ...o not operate the device in case if the instrument looks damaged in any way if the instrument has any loose parts if the instrument does not function Consider whether safe operation of the device is possible after prolonged storage under unfavorable conditions outdoors or in moist environments after excessive transportation stress e g due to poor packaging under severe environmental conditions hig...

Страница 4: ...ice is stored only with fully charged battery After three months or longer in storage the battery should be recharged to avoid a reduction in lifetime In case of re chargeable battery the battery will charge when the plug in power supply is connected to the device It is not necessary to switch on the device To charge the battery use only the plug in power supply supplied Any other power supply cou...

Страница 5: ...ch can cause eye damage Please check and follow safety in structions as provided by the manufacturer of the light source Health hazard guidelines are available from radia tion protection agencies and occupational health and safety protection offices Perils Clause Gigahertz Optik GmbH as manufacturer of the BTS256 LED measurement instrument has informed the owner and operator herein about the possi...

Страница 6: ...he electrical power Measurement of the total light output in lm instead of luminous intensity in cd pro duces much better reproducibility because it is independent of spatial light distribution picture 6 2 which may be influ enced by temperature humidity distance different viewing angles misalignment and other experimental error Measurement of luminous flux with a goniometric pho tometer is the mo...

Страница 7: ...ting area LED sources and LED arrays the only choice is large diame ter integrating spheres Besides light intensity spectral intensity distribution and color data are important test properties in LED testing The spectrometer is the most commonly used measurement de vice for these types of measurements However the photo diode array spectrometer employing low cost CCD sensors is limited by sensor in...

Страница 8: ...pensation Low light detection with CCD photodiode array technology can be achieved by employing offset com pensation in combination with very long integration times Due to thermal drift LEDs are often operated in pulse width controlled mode picture 8 1 The reduced average power under this mode produces a higher peak intensity in light output For accurate flux measurements at lower fre quency the l...

Страница 9: ...ultra com pact remote controlled shutter is provided for on line offset compensation of the diode array through dark signal meas urement For best signal to noise ratio the offset compensa tion is done in an on line mode for each measurement with identical integration time as that of the measurement picture 9 3 In applications where the flux level remains the same over a constant integration time a...

Страница 10: ...the required 5V operating voltage NOTE The BTS256 LED RS232 interface and the USB to RS232 adapter are custom modified to supply power to the LED tester Both devices should only be used with the BTS256 LED and not on any other conventional interface device To operate the BTS256 LED it needs to be connected to a laptop or PC with USB interface by using the USB RS232 adapter picture 10 2 supplied Th...

Страница 11: ... sive integrating sphere system programs available Worldwide acceptance is due to its modular design concept that allows the end user to set up the sphere according to his own application specifications and budget requirements Each integrating sphere is built to order from a large stock of standard components using an efficient cost effective production process Custom modifications of standard com...

Страница 12: ...ens the configuration window Before first measurement the available items must be configured or at least checked The setup configuration is stored for following measurements even if the G O O S is switched off Measurement Device includes the BTS256 LED tester set up The BTS256 LED offers an integral and spectral measuring sensor that need to be set up in the configuration window 1 Open the integra...

Страница 13: ...wn A fixed diode array integration time avoids very long measurement times that can reach up to 120s 2x60s in case of on line offset for low signals If manual gain is selected the integra tion time representing the diode array sensitivity must be set Select the same integration time as that displayed dur ing a measurement under autorange setting The array signal level is also displayed on the meas...

Страница 14: ...ues 7 color temperature in K 8 diode array signal level 100 indicates saturation 9 a Z correction factor 10 dominant wavelength 11 wavelength of peak intensity 12 peak intensity Information window displays measure ment set up conditions Measurement window after measure ment is stopped with activated CRI window Please note that CRI measurements require a 1nm spectral bandwidth set up for the diode ...

Страница 15: ...te Control Measurements and Documentation Continued Version 01 2009 01 2D graphic of spectral flux distribution with activated cursor for wavelength intensity indication CIE chromaticity diagram with xy coor dinates CIE chromaticity diagram with u v coor dinates ...

Страница 16: ...ed in the print out If the CIE xy or CIE u v are activated the 2D graph will be replaced by the selected one In the preview window the print out layout can be checked before printing the document Measurement data can also be stored in ASCI file format using the standard PC storage routines int includes all integral measurement data sp3 includes scaled wavelength and spec tral flux data Instruction...

Страница 17: ...09 01 The data logger mode enables meas urement and data storage in a user defined sequence Set up is done in the configuration window for the data log ger Data logger measurement is initiated with the start button Upon completion of the measurement sequence the data can be printed and or stored in ASCII file Print out preview ...

Страница 18: ...configuration screen After the start of the substitution correc tion routine 1 the operator is asked to ensure that the BTS256 LED tester measurement port is oriented toward a black background or set onto a black diffuse reflecting surface 2 The sur face must be black since colored sur faces will change the reference meas urement If not in a darkroom ambient light background is also not acceptable...

Страница 19: ...d Version 01 2009 01 6 If the evaluated substitution correc tion value is to be used for following measurements it needs to activated 7 The evaluation steps are displayed 8 Application of the substitution error correction must be activated 9 Stored substitution correction factors can be loaded for use 7 6 8 9 9 ...

Страница 20: ...n_white int the integral measurement data is stored Use Excel import function to import the data into Excel The Excel text conversion assistant will appear to handle the data separators The supplied G O O S version also supports Gigahertz Optik s X4 light analyzer which offers many more addi tional functions than the BTS256 LED tester BTS256 LED data shown az0 value0 unit peak lambda peakPower T x...

Страница 21: ...UX Power Supply button 2 opens the LPS 100 lamp power supply configuration window used to operate the auxiliary lamp Configuration of the power supply is done by the manufacturer during the instrument set up and should only be changed if a different power lamp is used The substitution correction button 3 opens the operation window First step is to switch on the auxiliary lamp 4 and confirm the lam...

Страница 22: ...red with the sphere set up as it is in calibra tion conditions This means no sample and no ambient light at the sphere measurement port 5 The measurement of the empty sphere is confirmed in the info window 6 Second auxiliary lamp flux as influ enced by the test sample DUT is measured The DUT including accesso ries e g mount adapter leads is placed in measurement position at the spheres measurement...

Страница 23: ...he file name To activate the substitution correction factor for following measurements check ON 1 under Substitution Cor rection Factor Several substitution correction factors for different DUT models can be evalu ated during one session To finish the substitution routine the auxiliary lamp should switched off Lamp will power off after a few seconds under the power supply off ramp func tion Do not...

Страница 24: ... ODP97 coating Cone adapter measurement aperture diameter 10mm White LED for use as auxiliary lamp AUX LED delay 1ms LED current peak max 350mA ca pacitance supported Cone adapter ex change effect within 0 5 Microcontroller 16Bit 25ns instruction cycle time Power 5VDC to 7VDC 250mA peak during capacitance loading Remote interface RS232 115200Baud 8D IS N Temperature Operating 10 to 30 C Storage 10...

Страница 25: ...23 EEC For the evalutation regarding the Electromagnetic Compatibility the following standards were applied EN 61326 1 2006 EN 61000 6 3 2007 EN 61000 6 2 2005 The following manufacturer is responsible for this declaration Name GIGAHERTZ OPTIK GmbH Address Fischerstraße 4 82178 Puchheim Germany Person responsible for making this declaration Name Anton Gugg Helminger Dipl Ing FH Position Chairman P...

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