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-50-V01 integrating sphere
The ISD-50-V01 integrating sphere makes it possible to measure the luminous flux, spectrum, color, and color rendering index of LED arrays and LED spot lamps with diameters of up to 127 mm as well as single LEDs with diameters of up to 10 mm (BTS256-LED without additional integrating sphere).. The integrating sphere is equipped with an auxiliary lamp for self-absorption correction. The BTS256-LED can still be used for single, onboard LEDs. A bayonet adapter enables connection of the device onto the ISD-50-V01 integrating sphere.
One essential quality feature of photometric devices is their precise and traceable calibration. The ISD-50-V01 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 of the luminous flux is done using a BN-LHSF-2P-20 calibration lamp that has 2pi radiation characteristics in the sphere. Every device is delivered with its respective calibration certificate.
Spectroradiometer for efficient measurement of the luminous flux, spectrum, color, and Color rendering index of LED spot lamps with diameters of up to 127 mm
Integrating sphere with a 50 cm diameter and 127 mm measurement port. Spectroradiometer can be used without the integrating sphere – for measurement of single LEDs
1.2 lm to 120,000 lm, 360 nm to 830 nm
Inspection of incoming products (single LEDs), LED spot lamps with a diameter of up to 127 mm, quality assurance in production processes, design
Factory calibration. Traceable to international standards
Luminous flux calibration +/-8%
|Input optic - ISD-50-V01||
Integrating sphere with barium sulfate coating. Measurement port with 127mm diameter. Port reducer with 50.8mm diameter and knife-edges. 12V/20W Halogen auxiliary lamp. Table stand.
This device is based on the BTS256-LED, please find detailed specification there.
|typical measurement time||
BTS256-LED: max. 1000 lm ≤ 5 ms (white light)
BTS256-LED: min. 10 mlm ≤ 30 s (white light)
BTS256-LED with ISD-50-V01: max. 120000 lm ≤ 5 ms (white light)
BTS256-LED with ISD-50-V01: min. 1,2 lm ≤ 30 s (white light)
|max. luminous flux||
BTS256-LED typ. 70000 lm
BTS256-LED with ISD-50 typ. 8000 klm
|Noise equivalent luminous flux||
BTS256-LED Tester typ. 0.05 mlm
|Dimensions||BTS256-LED + ISD-50-V01|
|Produktname||Product Image||Description||Show product|
|S-SDK-BTS256||Software Development Kit for BTS256 variants.|