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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-50HF-V01 or ISD-50HF-V02 integrating sphere

The 50 cm diameter ISD-50HF-V01 integrating sphere makes it possible to measure the luminous flux, spectrum, color, and color rendering index of extra-large LED lamps with 2pi and 4pi radiation characteristics. 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-50HF-V02 is offered as an alternative and has an additional 2pi measurement port with a 127 mm diameter. 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-50HF integrating sphere.


Calibration

One essential quality feature of photometric devices is their precise and traceable calibration. The ISD-50-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 ISD-50HF-V01 integrating sphere for 2pi and 4pi LED lamps inside the sphere

BTS256-LED spectroradiometer with integrating sphere for 1pi and 4pi LED lamps inside the sphere and additional measurement port with plug

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

- ISD-50HF-V01-BTS256-LED: Spectroradiometer for measurement of the luminous flux, spectrum, color, and color rendering index. Operation with the LED lamps at the center of the sphere

- ISD-50HF-V02-BTS256-LED: spectroradiometer for measurement of the luminous flux, spectrum, color, and color rendering index. Operation with the LED lamps at the center of the sphere or outside the sphere

Main features

- ISD-50HF-V01-BTS256-LED: Integrating sphere with a 50 cm diameter. Height-adjustable sample holder. Spectroradiometer can be used without the integrating sphere to measure single LEDs

- ISD-50HF-V02-BTS256-LED: Integrating sphere with a 50 cm diameter. One openable hemisphere. Additional measurement port with a 127 mm diameter. Height-adjustable sample holder. Spectroradiometer can be used without the integrating sphere to measure single LEDs

Range of measurement

1.2 lm to 120,000 lm, 380 nm to 750 nm 

Typical applications

Inspection of incoming products (LED lamps), quality assurance in production processes, design

Calibration

Factory calibration. Traceable to international standards

Product
General

This device is based on the BTS256-LED, please find detailed specification there.

Calibration uncertainty

Luminous flux calibration +/-8%

Input optics - ISD-50HF-V01

Integrating sphere with barium sulfate coating. Measurement port with 63.5mm diameter. Port reducer with 50.8mm diameter and knife-edges. 12V/20W Halogen auxiliary lamp. Table stand.

Input optics - ISD-50HF-V02

Integrating sphere with barium sulfate coating. 500mm internal diameter. An openable hemisphere. Additional measurement port with a 127mm diameter in the fixed hemisphere. Port plugs for closure of the measurement port. UMSH-AP-500 height-adjustable sample holder. Two-way baffle between the detector and the sphere center as well as the detector and measurement port. Shadowing to the sphere meter for lamps with an extent of up to 100mm. 12V/50W Halogen auxiliary lamp. Table stand.

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-50HF-V01: max. 120000 lm ≤ 5 ms (white light)

BTS256-LED with ISD-50HF-V01: min. 1.2 lm ≤ 30 s (white light)

Integral Detector
Max. measurable 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
BTS256-LED Tester with ISD-50-V01 typ. 10 mlm

Type Description File-Type Download
Datasheet ISD-50HF-BTS256-LED PDF
Produktname Product Image Description Show product
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
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
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.
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.
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.
S-SDK-BTS256 Software Development Kit for BTS256 variants.
Article-Nr Modell Description Request / Compare
Product
15298101 ISD-50HF-V01

Integrating sphere with 500mm diameter. One hemisphere can be opened. Height-adjustable sample holder. Detector port for the BTS256-LED. Two-direction baffle for shadowing the sphere center and measurement port. Auxiliary lamp, table stand.

15298102 ISD-50HF-V02

Integrating sphere with 500mm diameter. One hemisphere can be opened. Height-adjustable sample holder. Measurement port with 127mm diameter. Removable port plug. Detector port for the BTS256-LED. Two-direction baffle for shadowing the sphere center and measurement port. Auxiliary lamp, table stand.

15297817 BTS256-LED

Measurement device, BTS256-LED-CA10 cone adapter, USB cable, hard-top casing, operation manual, software CD, calibration certificate.

Calibration
15300227 K-BTS256-LED-U-I

Calibration of the BTS256-LED with external integrating sphere

Re-calibration
15300226 K-BTS256-LED-I

Recalibration of the BTS256-LED Tester. Only possible with the 10mm cone adapter.

15300227 K-BTS256-LED-U-I

Calibration of the BTS256-LED with external integrating sphere

Software
15298218 S-SDK-BTS256

Software Development Kit for the implementation of the BTS256 or variants into custom made software

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