TOPCON Luminance Colorimeter BM-7A

Descrptions:

The bm-7 color luminance meter is a three-color photoelectric detection component with high stability and strict matching of spectral response curve Xr, rY and rZ, embedded single-chip microcomputer system, low power consumption with backlit liquid crystal display, and large capacity lithium battery. Therefore, it is not only suitable for laboratory use, but also very convenient for field measurement.The bm-7 color luminosity meter is equipped with a large aperture high quality telescopic objective lens, which can be used to measure the brightness and color aiming point of distant objects or light sources.Adding a close - up ring can be used to measure the brightness and color aiming point of a close - up small object or light source.

Features:

• luminance measurement range: 1 ~ 120 CD/m2 000 CD/m2
•  luminance measurement allows error: plus or minus 3% reading + 1 word (according to the national metrological verification regulations JJG211-89 method, index is higher than 5% of the permissible error requirement)
• color temperature measurement range: 1500 k - $25000 k
• color measurement accuracy: + / - 0.005 (brightness is more than 40 CD/m2, A light source conditions);
• + / - 0.02 (brightness is more than 40 CD/m2, JJG554-88 transmission type under the condition of the standard color plate)
• view: infinity when measuring field of less than 1., the viewfinder field is greater than 7.
• measuring distance: 1 m ~ infinity (add close-up answer the ring can be measured to 0.35 m)
• power supply: battery or 220 v ac adapter power supply
• observation of ocular diopter adjustment range: - 4 ~ + 2
  

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