Gossen Photo M508G Offers

This high precision luminance meter for distance measurement with an acceptance angle of 1° is assigned to class B in accordance with DIN 5032-7, appendix B of IEC 13032-1 and CIE 69. It measures the perceived brightness of back-lighted surfaces in candelas per square meter (cd/m²) or foot-lamberts (fL) in consideration of ambient light.

MAVO-SPOT 2 USB Is equipped with an excellent adaptation to the spectral brightness sensitivity of the human eye and is highly precise with a minimal deviation of just f1' < 3 %, which is significantly better than specified in the standard. By means of the mirror reflex optics, the measuring subject may be targeted precisely in a 15° field of view and a sharply marked 1° measuring circle in the center of the viewfinder. Focus can be set for distances ranging from 1 meter to infinity. Shorter distances as of 34cm are made possible by means of optional close-up lenses. Alternatively, contact measurement can also be performed with an optional, top quality probe. The velvety coating on the adapter disc prevents scratching of self-luminous and back-lighted surfaces. Measurement functions are selected and measurements are started with convenient on-hand operation.

The display on the viewfinder is activated along with back-light by simply pressing a key. The comparative and ratio measurements are especially advantageous, by means of which deviation of measured value B from reference value A is evaluated and displayed. The relationship A/B is used for contrast measurement at workstations. Percentage deviation %A allows for an assessment of the consistency of monitor screens and projection screen lighting, and difference A-B is used to detect deviation during the production process.

Features

• High precision spotmetering of the luminance with a  measuring angle of 1° according to DIN 5032-7,Class B and DIN EN 13023-1, Appendix B
• SLR viewfinder with measuring circle of 1° and  viewing field of 15°
• Measuring from the distance from 1m to Infinity, with  close-up lenses (optional) down to 34cm
• Contact measurement with optional Measuring Probe
• Backlight display illumination with LCD read-out in the viewfinder
• The silicon photo diode is colour corrected, i.e. its  spectral responsivity is matched to the photopic daylight vision of the human eye V(λ)
• Remarkably easy, one hand use, with only four buttons and 1 sliding switch
• Configuration via DIP Switches in the battery compartment
• Automatic measuring range selection, total range 0.01cd/m2 to 99.990cd/m2 subdivided in four measuring ranges and 0.003 to 29.187 foot Lambert
• Data memory for up to 1000 single measuring values, or alternatively in 10 groups
• USB 2.0 Port
• Tripod socket
• CD Rom included with software for visualizing and processing  the values measured and controlling the meter

Applications

Ideal for the following applications: Monitors, TV Screens, Light Boxes, Light Panels, Traffic Signals, Accent Lighting, Medical Offices, Tunnel Lighting.