Practical Hand-Held LED Tester For Complete LED & Light Source Color, Light Intensity & Light Spectrum Measurements

BTS256-LED Tester for LED Measuremnt from Gigahertz-Optic

Measure Single LEDs, Arrays or Modules & Light Sources

Under Real Application Conditions

With This Cost Effective LED Color & Light Meter

Easily Measure Narrow Beam Emitting Light Sources & Light Guides
Gigahertz-Optik's BTS256-LED Tester is designed to measure the luminous flux, color and spectral characteristics of individual pc board mounted LEDs, discrete LEDs within a module, miniature lamps, endoscopes and any narrow beam emitting light source.

Measure Directional & Omnidirectional Light Sources and Fixtures
Light intensity in lumens, color and spectral distribution of larger size light sources and fixtures can be measured by attaching the LED tester to a Gigahertz-Optik integrating sphere. Plus illuminance in lux can be measured with the optional diffuser window attachment.

Radiometric, Photometric, Colorimetric Measurands:

  • Φe (λ) spectral radiant power
  • Φv luminous flux
  • Φe radiant power
  • Es/Ev scotopic / photopic ratio
  • x; y    CIE 1931 color coordiantes
  • u'; v'  CIE 1976 color coordiantes
  • CCT   correlated color temperature
  • Δuv    deviation from the blackbody locus
  • X; Y; Z CIE color
  • Ra; R1..15   CRI - color rendering index
  • λdom dominant wavelength
  • pe purity
  • CIE 1931 color graphic
  • CIE 1976 color graphic
  • CRI Bar Plot
  • λp peak wavelength
  • λc center wavelength
  • λs centroid wavelength
  • λ0.5 spectral half-width (FWHM)
  • TM-30-15 Rf fidelity index
  • TM-30-15 Rg gamut index
  • TM-30-15 Rf,h1..16 hue fidelity indices
  • TM-30-15 Rcs,h1..16 chroma change by hue indices
  • TM-30-15 color vector graphic
  • TM-30-15 Rf, Rg graphic

Extra Measurands with BTS256-LED-DA Diffuser Option

  • Ee (λ) spectral irradiance
  • Ev illuminance (fc & lux)
  • Es scotopic illuminance (fc & lux)
  • Ee integral irradiance
  • Ez melanopic illuminance
  • Ee,z melanopic irradiance
  • Ev,mel melanopic daylight equivalent illuminance
  • Esc cyanopic illuminance
  • Ee,sc cyanopic irradiance
  • Emc chloropic illuminance
  • Ee,mc chloropic irradiance
  • Elc erythropic illuminance
  • Ee,lc erythropic irradiance
  • Er rhodopic illuminance
  • Ee,r rhodopic irradiance

Key Components of the LED Measurement Tester
Key components of the BTS256-LED Tester include a built-in 50mm diameter integrating sphere with a unique exchangeable cone adapter input optic nozzle designed to minimize positional error, auxiliary LED for test sample absorption error factor correction, remote controlled shutter for on-line offset compensation of the diode array and Gigahertz-Optik's innovative Bi-Tech Sensor LED measurement technology.

Built-In Integrating Sphere with Exchangeable Input Nozzle
BTS256-LED Sphere from Gigahertz-OpticThe integrating sphere is made out of GO's ODM98 white diffuse plastic and includes a sealed window light output port. Interchangeable different size input nozzles (placed over the board mounted test LED) screw onto the port.

Different size integrating sphere set-ups for use with the BTS256-LED Tester are available for larger size light source measurement.

High Precision Photodiode/Compact Spectrometer
The Bi-Technology BTS256P light sensor houses both a high precision photometric filtered photodiode for accurate luminous flux detection over a wide dynamic range and a compact low stray light design spectrometer. To achieve more stable readings in low frequency modulated light applications, the fast integral sensor (filtered photodiode) detects the frequency of the AC component of the light signal. Both sensors (integral and diode array) are then synchronized to that frequency.

Ultra Compact Electronically Controlled Shutter
Another important component is the ultra compact electronically controlled shutter for on-line offset compensation of the diode array through dark signal measurement and Gigahertz-Optik's Bi-Tech sensor.

Measure Wavelength Spectral Flux Distribution
Measure and display the spectral flux distribution in W/nm as well as peak intensity wavelength, dominant wavelength, xy and u'v' color coordinates, color temperature and color rendering index. The measured spectral data is also used for on-line correction of the photometric detector for any photopic spectral mismatch error.

Auxiliary LED Lamp
A white LED auxiliary lamp is included to compensate test sample absorbance errors. The PC operated LED measurement tester, auxiliary lamp function and calibration correction for different size input nozzles are all under control of the supplied G.O.O.S. software.

The optional BTS256-LED-ALP Lamp Power Supply is recommended for operation of the integrating sphere's built-in auxiliary lamp. Contact the factory for more power supply options.

Product Specifications
For product specifications and configurable options for the BTS256-LED Tester, please visit the Gigahertz-Optik main website here.

To Order The BTS256-LED Measurement Tester, Call Us Today At 1-978-462-1818.

See this LED Color & Light Meter in Action

Video of the BTS256-LED for LED Measurment from Gigahertz-Optic

Our 10 minute product video demonstrates all aspects of the BTS256-LED, including software and optional attachments.

Practical Solutions To Real LED Measurement Problems

Here's The Problem:
#1: You measure the luminous flux and color parameters of different color and white LEDs in your lab. The data looks good but was the job done right? The LEDs are then mounted into LED modules. Upon final QC, some LEDs appear brighter or a different color than others so you're called back in to recheck your LED light and color measurements. However, you really don't have the right LED tool to do on-board light intensity and color spectrum measurements that can detect the slight variations in color and intensity between the discrete LEDs.

#2: You need to implement a means of quality control for finished LED fixtures. QC decisions are to be based on light quality parameters requiring fast accurate light intensity, color and spectral measurements with reproducible and repeatable results. Since the finished product will be shipped worldwide, internationally accepted calibration traceability and certification of the LED measurement instrument would be a competitive advantage.

Here Are The Requirements:

  • LED color meter / LED light meter specifically designed for on-board LED analysis
  • Prohibit 'cross-talk' contamination of readings from adjacent LEDs
  • Ability to measure all color parameters and luminous flux (total lumens)
  • PC compatibility and data logging function
  • Portable hand-held unit for ease in maneuvering into position
  • Low cost due to requirement for multiple units for QC & LED engineering
  • Traceable calibration to the latest international LED test standards
  • Add-on capability to measure finished product LED arrays, modules and fixtures with larger integrating sphere
  • Ability to measure illuminance in lux like a standard photometer but with full color and light spectrum data included

Here's The Solution:
The portable BTS256-LED Tester with add-on integrating sphere for light & color & spectral measurement of individual, array and module LED packages.

BTS256-LED Sphere from Gigahertz-Optic
Click to see a larger image.

Interested in discussing your LED measurement application? Give us a call!

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