New International Standards< CIE S 02 6/E:2018 CIE System for Metrology of Optical Radiation for ipRGC-Influenced Responses to Light> A quantification of the spectral impact is given, expressed using the retinoid equivalent daylight (D65) illuminance, Melanopic EDI (lx).
Biological rhythms are controlled by rhythmic genes in the organism. At present, researchers generally believe that the main influencing factors of biological rhythm are time and light, time is unchangeable, while light can be regulated by human beings, with different light quality and light quantity at different times of scientific distribution, so that most of the time people are in a healthy and good rhythm level, as one of the design goals of human-centered lighting.
Functional features£º
• Measurement of strobe/fluctuation depth
• Measurement of bright visual illuminance
• Measure non-visual illuminance
• Diagonal angle can be set
Strobe (fluctuation depth)
Strobe or flicker in recent years has gradually been paid attention to and understood by the industry, thanks to the development of a variety of professional instruments that can be specifically analyzed from data on the impact of flicker on vision or health. Strobe hazards despite the controversy, there are different standards, different periods, different institutions proposed different evaluation methods, at present, we are more concerned about the strobe fluctuation depth strobe frequency (Par 1789), SVM and Pst (CIE), fluctuation depth as shown in the figure below right is a 100Hz strobe waveform graph: the peak value is Max, the valley value is Min,
Depth of fluctuation = =(Max-Min)/(Max+min) *100%
The fluctuation depth is the main indicator measured by this machine. The figure below is very typical of the strobe fluctuation waveform, and the last column evaluates the severity of the strobe: this case is more serious (8.2).
Other parameters description:
• Stroboscopic index: the sum of the area of the fluctuation chart beyond the average value and the ratio of the total area.
• Strobe frequency: the frequency of the strobe, when DC or close to DC, the frequency is 0Hz.
• Scan: the actual scanning frequency, scanning frequency range:5-200KHz.
• Channel: signal sampling channel, C0-C7, the higher the illumination channel is smaller, the smaller the sampling time constant, the channel is small suitable for high-frequency measurement, the channel is large high-frequency measurement error will become larger.
Spectrum
Press the right button to start measuring the spectral value of the target immediately, the red light on the left side will start to go off, the device will start to match the test parameters and take samples, when the sampling is completed, the red light will come on and the spectral graph will be output, and the color parameters will be output, as shown in the figure below left.
To view the detailed results, press the middle key, first display the lower right graph, color rendering index Ra, R1-R15. press the middle key again, switch to the spectral energy statistics and illuminance, irradiance, EML EDI value; PPFD is the optical quantum density graph in which the data is 18.571 umol/m^2/S. Blue light irradiance is the weighting function of blue light hazard spectrum according to IEC 62471:2006 The result of the convolution with the spectral energy distribution. To facilitate the application of the spectrum, the percentage energy distribution is given for the wavelength interval between UVA and 100 nm.
Right click to enter the spectral measurement mode, then press the right button to execute the spectral measurement, view the detailed measurement results by the middle button Left click to exit the spectral mode and return to the main page.
Technical parameters of EDI illuminance meter
1. Based on standards or literature
• <CIE S 02 6/E:2018 CIE System for Metrology of Optical Radiation for ipRGC-Influenced Responses to Light>
• [The WELL Building Standard Q2 2020 version]
• Group standards: T/SIEATA000001-2020
• <Ranking evaluation for classroom lighting quality in primary and middle schools >
• Calculation method (Robert. Lucas et al.):
EML value = Km∫Ee(λ). Nz(λ)dλ. ∫ V(λ)dλ/ ∫ Nz(λ)dλ
EML - equivalent lux of retinoid
Km - constant, the maximum spectral photopic efficacy of bright vision
V(λ) - bright vision spectral photopic energy function
Ee(λ) - absolute spectral energy distribution
Nz(λ) - black-optics spectral photopic energy function
λ --spectral wavelength range: 380-780nm
Melanopic EDI - retinotopic equivalent daylight (D65) illuminance
Melanopic EDI=EML×γ (γ is a constant, γ=0.9063)
2. Measurement method: spectroscopic method
3. Measurement parameters:
o EDI illumination:
o Measurement range 0.5 - 200 000 edi
o Repeatability: ±0.5% FS
o Measurement accuracy: ±5.0% FS
o Reading resolution: 0.1 edi
*Minded visual illumination.
o Measurement range 0.5 - 200 000 lx
o Repeatability: ±0.5% FS
o Measurement accuracy: ±5.0% FS
o Inclination measurements:
Measurement range 0-180 degrees
Measurement accuracy: ±1.5 degrees
Take the value of the allowable angle error: ± 5 degrees
4. Electrical parameters:
Lithium battery specification 18650, rated voltage 3.7V,
Capacity 2200mAh, certified UN38.3.
Charging requirement: 5 ±0.4V, 1.0-3.0A
mini USB-US
Models and Functions:
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