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Retroreflection Measuring Unit RETRO 1000 (100 ft.)
Measurement of the coefficient of luminous intensity of retro reflectors
according to
- CIE Publ. No. 54.2-2001
- DIN 67520
- EN 471 High-visibility clothing
- ECE regulations R 3, R 27, R 69, R 70, R 104 (at 100 ft measuring distance)
- SAE Standard J 594, J 774, J 943, J 2041
Projector
- Projector with color temperature acc. to Standard Illuminant A
- Measuring distance 100 ft
- Projector aperture 48 mm diameter (corresponding to 5.4')
- Measuring field approx. 10 in (250 mm) diameter
- Uniformity of illuminance < ± 2 % with 200 mm diameter
- Adjustable lamp socket
- Lamp dimmer for visual control of filament position during adjustment of uniformity of illuminance
- Luminous flux control via beam splitter, photometer head, and electronic circuit
- Housing with adjusting screws to direct the illuminant axis to the reference point of the measuring object
- Built-in power supply for 230 V, 50-60 Hz
Photometer heads
- Two photometer heads with Si-photoelements, fine approximation to the V(λ) function, for the observation angles 12' and 1°30'
- Aperture 1 x 1/2 sq.in. (25 mm x 13 mm, corresponding to 2.9' x 1.4')
- V(λ) match ≤ 3 % according to DIN 5032 part 6 and CIE Publ. No. 69 (1987)
- Individual measuring protocol of the photometer heads
- Optical system and built-in baffles for straylight reduction
- Precision operational amplifiers with additional voltage/current converters to produce an impressed output current
- Projector and photometer heads are built in one housing and adjusted within the observation half-plane
Electronic display and control unit
- 3½-digit display of measuring values
- Display range 0.1 mcd/lx (last digit) to 199 900 mcd/lx (maximum)
- For samples with a size of 10 x 10 cm, the corresponding range of the coefficient of retroreflection is R' = 0.01 - 19 990 cd/lx/m2
- Range selection automatically or manually
- Resolution 0.05 % of maximum in the selected range
- Absolute measuring error < ± 1.5 % ± 1 digit against PTB standard at Standard Illuminant A
- Repeatability error < ± 0.2 % ± 1 digit
- Linearity error < ± 0.15 % ± 1 digit
- Changeover switch for both photometer heads
- Switch for projector lamp for zero-setting
- Warning sign for luminous flux control
- Analog output 0 - 2 V
- BCD output
- Connection cable to projector
- Built-in power supply for 230 V, 50-60 Hz
- Calibration of RETRO 1000 (10 m), traceable to PTB standard, with LMT calibration certificate
Illuminance meter POCKET-LUX 2
- 4½-digit LED display
- analog output 0-2 V
- separate photometer head P 10 FC0 with 2 m connection cable
- light sensitive surface 10 mm dia.
- fine V(λ)-approximation
- cos-correction
- adapter for photometer head, battery pack, carrying case
- calibration, traceable to PTB standard, with LMT calibration certificate
- individual test report for V(λ)-approximation and cos-correction
- class B according to DIN 5032 part 7
- Version B display range 0.01 lx to 19 999 lx
- Additional photometer head with Si-photoelement, fine approximation to the V(λ) function, for the observation angle 20' according to ECE Aperture 1 x 1/2 sq.in. (25 mm x 13 mm, corresponding to 2.9' x 1.4'))
- IEEE-488 Bus Interface, Listener and Talker, (instead of BCD output) to connect the retroreflection measuring unit to a computer
- Power supplies for 115 V, 60 Hz, for projector as well as for electronic display and control unit (instead of 230 V)
- Mounting base
- Software LMT LIMES 2000
- Goniometer
- Installation and training
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