The BTS256-LED light meter
In its standalone mode, the compact BTS256-LED meter is designed for the convenient measurement of luminous flux, spectrum, color, and color rendering index of single LEDs. A key feature is the conical measurement port at the entry of the internal integrating sphere which enables the measurement of onboard LEDs. The bayonet connector used to attach the conical adapter makes it possible to combine the BTS256-LED with other accessory components. Gigahertz-Optik offers different accessories as part of the BTS256-LED Plus Concept which greatly extends the measurement capabilities of the BTS256-LED.
Enhancement of the BTS256-LED using the ISD-100HF-V01 or ISD-100HF-V02 integrating sphere
The 100 cm diameter ISD-100HF-V01 integrating sphere makes it possible to measure the luminous flux, spectrum, color, and color rendering index of extra-large LED lamps with 2 pi and 4pi radiation characteristics inside the sphere. One half of the sphere can be opened in order to fix LED lamps onto the sample holder at the center of the sphere. The height of the sample holder can be adjusted. The ISD-100HF-V02 is offered as an alternative and has an additional measurement port with a 254 mm diameter for the measurement of 2pi lamps. This remains closed whenever it is not in use. Both variants are equipped with an auxiliary lamp. The BTS256-LED can still be used to measure single, onboard LEDs. A bayonet adapter enables connection of the device onto the ISD-100HF integrating sphere.
Calibration
One essential quality feature of photometric devices is their precise and traceable calibration. The ISD-100-HF with the BTS256-LED is calibrated by Gigahertz-Optik’s calibration laboratory that is accredited by DAkkS (D-K-15047-01-00) for the spectral responsivity and spectral irradiance according to ISO/IEC 17025. Calibration for the luminous flux is performed using a BN-LHSF-104, which is placed at the sphere center. Spheres with an additional measurement port require additional calibration with a BN-LHSF-2P-20 calibration lamp, which has 2pi radiation characteristics in the integrating sphere. Every device comes with its respective calibration certificate.
BTS256-LED spectroradiometer with integrating sphere ISD-100HF-V01 for 2pi and 4pi LED lamps inside the sphere
BTS256-LED spectroradiometer with ISD-100HF-V01 integrating sphere for 2pi and 4pi LED lamps inside the sphere
1) BTS256-LED 2) 50mm integrating spherel 3) Precision bayonet mount 4) BiTec sensor with Si photodiode, CMOS diode array spectrometer and shutter 5) Microprocessor 6) USB interface 7) ISD-21 integrating sphere 8) Bayonet mount 9) Baffle 10) Auxiliry lamp 11) Measurement port
BTS256-LED for measurement of the luminous flux, spectrum, color, and color rendering index of single LEDs
The S-BTS256 user software for the luminous flux with integrated and external sphere.
Full screen display of the luminous spectrum
CIE 1931 chromaticity diagram with binning fields
Substitution correction menu
| General | |||
| Short description |
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| Main features |
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| Range of measurement | 4 lm to 400,000 lm, 380 nm to 750 nm |
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| Typical applications | Inspection of incoming products (LED lamps), quality assurance in production processes, design |
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| Calibration | Factory calibration. Traceable to international standards |
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| Product | |||
| General | This device is based on the BTS256-LED, please find detailed specification there. |
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| Calibration uncertainty | Luminous flux calibration +/-8% |
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| Input optics - ISD-100HF-V01 | Integrating sphere with barium sulfate coating. 1000mm internal diameter. An openable hemisphere. UMSH-AP-1000 height-adjustable sample holder.. Baffle between the detector and teh sphere center for lamps with an extent of up to 300mm. 12V/100W Halogen auxiliary lamp. Table stand. |
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| Spectral Detector | |||
| Measurement Range and Measurement Time | BTS256-LED: max. 1000 lm ≤ 5 ms (white light) BTS256-LED: min. 10 mlm ≤ 30 s (white light)
BTS256-LED with ISD-100HF-V01: max. 400000 lm ≤ 5 ms (white light) BTS256-LED with ISD-100HF-V01: min. 4 lm ≤ 30 s (white light) |
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| Integral Detector | |||
| Max. measurable luminous flux | BTS256-LED typ. 70000 lm BTS256-LED with ISD-100 typ. 32000 klm |
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| Noise equivalent luminous flux | BTS256-LED Tester typ. 0.05 mlm |
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| Produktname | Product Image | Description | Show product |
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| UMLA-SHAP-E27 |  |
Bulbs measuring socket for the use with integrating spheres. Features: E27 socket. Quadrupole connecting the lamp to a galvanically isolated power supply and voltage measurement |
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| UMLA-SHAP-E14 |  |
Bulbs measuring socket for the use with integrating spheres. Features: E14 socket. Quadrupole connecting the lamp to a galvanically isolated power supply and voltage measurement |
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| UMLA-SHAP-G9 |  |
Bulbs measuring socket for the use with integrating spheres. Features: G9 socket. Four-line connection of the lamp socket for a separate power supply and voltage measurement. |
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| UMLA-SHAP-GU10 |  |
Bulbs measuring socket for the use with integrating spheres. Features: GU10 socket. Four-line connection of the lamp socket for a separate power supply and voltage measurement. |
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| UMLA-SHAP-GU5.3 |  |
Bulbs measuring socket for the use with integrating spheres. Features: GU5.3 socket. Four-line connection of the lamp socket for a separate power supply and voltage measurement. |
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| S-SDK-BTS256 |  |
Software Development Kit for BTS256 variants. |
