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Distance measurement of luminance
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MavoSpot 2 USB
The MAVO-SPOT 2 is a high-precision measuring instrument with a measuring angle of 1° for measuring light-source and surface brightness. Luminance measurements at distances of 1 meter to infinity can be performed with the instrument. The MAVO-SPOT 2 features mirror reflex optics with a 15° field of view in the viewfinder display, a sharply marked 1° measuring circle at the center and a focusing mechanism. Examples for the application of MAVO-SPOT 2 are luminance measurements of monitors, e.g. approval and consistency testing in the field of medical technology in accordance with DIN 6868-57 and IEC 61223-2-5, street, tunnel and airport illumination, illumination at sports facilities, in museums and public buildings, contrast measurements at workstations or contrast distribution of projection screens.
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Measurement according to DIN 5032 part 7 and DIN EN 13032
The close-up lenses available as accessories make it possible to shorten measuring distance to 34 cm. Luminance can be measured directly at displays with the help of the attachment for contact measurements. The light sensitive sensor is color corrected, that is its spectral sensitivity is matched to the spectral luminous efficiency of the human eye in daylight V(λ). Classification of luminance meters is specified in DIN 5032, part 7, and in DIN EN 13032, appendix B. The MAVO-SPOT 2 fulfills class B requirements in accordance with these standards. The instrument is equipped with a measured value memory module with up to 1000 memory locations which can be read out and processed either directly via the keypad and display, or via the integrated USB port with the help of the included standard software. Furthermore the memory locations can be grouped.
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Technical features of the device:
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gLUx evaluation software
The evaluation software gLux enables to measure at a specified intervall and measuring unit and to list or to chart these measured values. Measurement values can be saved as .txt-file, so that the result can be evaluated using a data base or a spreadsheet application.
gLux features additional functions to adjust weighting factors and measured variables, measurement ranges and sampling intervals to continuous measurements. Furthermore gLux offers the rendition of a test pattern with the densities of the SMPTE color bars for acceptance inspections and constancy tests according to IEC 61223-2-5.
The language of the user interface of gLux, german, english, spanish or french, can be chosen by the user on start of the program. p>
Data communication and
evaluation with gLux
Technical data
- Distance (contact-free) measurement
- Measuring angle 1°, field of view 15° diagonal
- Display viewfinder with back-lit LCD, measured value display with 4-digit precision
- Controls easy use with 4 keys and 1 slide switch
- Classification Class B per DIN 5032, part 7, and DIN EN 13032, appendix B, CIE 69
- Optical system 77 mm, flare factor f2 < 2%
- Focusing distance 1 m bis ∞, focusing with adjustment ring
- Light receiver Silicon photocell with V(λ) filter - f1 < 3%
- Measuring modes Luminance cd/m² or fL
- Luminance ratio A/B, deviation %A, difference A-B
- Measuring range 0.01 cd/m² to 99990 cd/m², 0.01 fL to 30000 fL
- Automatic range selection
- Memory function MEM, Measured value memory up to 1000 individual values or 10 groups with 100 individual values each (switchable)
- Battery indicator: multi-segment
- Interface USB 2.0 (compatible with USB 1.1)
- Tripod socket 1/4''
- Service life: app. 5000 measurements (with alkaline batteries)
- Power supply: two 1.5 V batteries (IEC LR6, AA type), external power is supplied from USB host when operated in PC-mode
- Operating temperature 0 °C to 50 °C
- Dimensions 190 x 90 x 57 mm
- Weight Approx. 400 g (without batteries)
Included with the instrument:
- MavoSpot 2 USB (GOLxxx) - Measuring device, protective filter, CD ROM, operating instructions, batteries, transport case, protective lens cap, protective eyepiece cap
Optional accessories:
- Close-up lenses for shorter distances as little as 34cm (optional):
- Close-up lens 1: reduces measuring distance to a range of approx. 51 cm to 1 m
- Close-up lens 2: reduces measuring distance to a range of approx. 34 cm to 51 cm
- Attachment for contact measurement (optional)
- GOSSEN Reflection Standard for illuminance measurement in Lux (optional)
- Baffle (optional)
- Carrying strap (optional)
- Factory certificate upon request (optional)
Subject to technical alterations




