JES t/LUM-A Luminance Meter
Features
System
|
OperationThe requirements for tunnel lighting are determined by the nature of the human eye. How well the eye recognises vehicles and other obstacles in a tunnel depends on the lighting and visibility as well as the reflexion characteristics of the road surface and the tunnel walls. Tunnel lighting needs to be adapted to these environmental conditions. The tunnel lighting must be controlled such that users, both during the day and by night, can approach, pass through and exit the tunnel without changing direction or speed with a degree of safety equal to that on the approach road. Especially the lighting of a tunnel entrance should be adequate to avoid the “black hole effect” when a driver enters the tunnel. Luminance is the measure representing what a human being perceives as brightness and as such is the main control variable for the tunnel lighting. The luminance photometer comes with a zoom lens that is focussed to measure the relevant area. Light from this area through the lens is directed to the photo element de-tecting its intensity. The integrated evaluation unit then calculates the luminance and provides it through the analogue output(s) Advantanges
|
ApplicationTunnels are important infrastructure elements in road networks and facilitate the connection of regions. Environmental conditions in tunnels are influenced by fog, particles and emissions and need to be monitored to protect people on their passage through the tunnel from danger and impacts on their health. Accidents in tunnels, and particularly fires, can have dramatic consequences and can prove extremely costly in terms of human life, increased congestion, pollution and repair costs. At every time people in the tunnel need to be supplied with breathable air and sufficient visibility. Since 1990 JES Elektrotechnik GmbH develops, installs and maintains systems to monitor air characteristics and lighting conditions in tunnels. Our systems are robust, durable and resistant against the corrosive atmosphere in a tunnel. They operate reliably and have a high accuracy in measurement. All systems fulfil the requirements of the EC guideline 2004/54/EC (Minimum safety requirements for tunnels in the trans-European road network) and the more detailed national guidelines and provisions:
Our range of products for tunnel covers systems for monitoring of
|
Technical Specifications
Sensor device
| Luminance meter with 1 analogue output | ||
|---|---|---|
| Model | t/LUM-A1 |  |
| Measured value | Luminance | |
| Measuring range | Customisable (to be specified with the order) typically 0 .. 10,000 cd/m², 0 .. 6,000 cd/m² (for L20) or 0 .. 10 cd/m² (for Lfi) |
|
| Angle of view | 8° .. 34° | |
| Analogue output | 1 x 4 – 20 mA | |
| Relay contact | 1 x operation (closed) / fault (open) | |
| Operating voltage | 230 VAC or 115 VAC ± 10 % 50/60 Hz ± 10 % |
|
| Power consumption | approx. 50 W | |
| Overvoltage protection | varistors (mains) surge arrestor and varistors (analogue output) |
|
| Dimensions | 180 x 180 x 445 mm (stainless steel) 245 x 180 x 485 mm (polycarbonate) without mounting flange |
|
| IP rating | IP 67 | |
| Materials | Stainless steel 1.4404 (AISI 316L) or 1.4571 (AISI 316Ti) Polycarbonate MAKROTECH UV® (on request if Class II appliance is required) ZTV-ING Anforderungsklasse I (all of the above) Custom-made: Stainless steel 1.4547 (AISI 254SMO) ZTV-ING Anforderungsklasse II |
|
| Weight | Luminance meter: 9.6 kg (stainless steel), 6.2 kg (polycarbonate) Mounting console: 4.0 kg |
|
| Temperature range | -40°C … +70°C | |
| Luminance meter with 2 analogue outputs | ||
|---|---|---|
| Model | t/LUM-A2 | |
| Measured value | Luminance | |
| Measuring range 1 | Customisable (to be specified with the order) typically 0 .. 500 cd/m² (example for Lfe at daytime) |
|
| Measuring range 2 | Customisable (to be specified with the order) typically 0 .. 50 cd/m² (example for Lfe at night) |
|
| Angle of view | 8° .. 34° | |
| Analogue output | 2 x 4 – 20 mA | |
| Relay contact | 1 x operation (closed) / fault (open) | |
| Operating voltage | 230 VAC or 115 VAC ± 10 % 50/60 Hz ± 10 % |
|
| Power consumption | approx. 50 W | |
| Overvoltage protection | varistors (mains) surge arrestor and varistors (analogue output) |
|
| Dimensions | 180 x 180 x 445 mm (stainless steel) 245 x 180 x 485 mm (polycarbonate) without mounting flange |
|
| IP rating | IP 67 | |
| Materials | Stainless steel 1.4404 (AISI 316L) or 1.4571 (AISI 316Ti) Polycarbonate MAKROTECH UV® (on request if Class II appliance is required) ZTV-ING Anforderungsklasse I (all of the above) Custom-made: Stainless steel 1.4547 (AISI 254SMO) ZTV-ING Anforderungsklasse II |
|
| Weight | Luminance meter: 9.6 kg (stainless steel), 6.2 kg (polycarbonate) Mounting console: 4.0 kg |
|
| Temperature range | -40°C … +70°C | |
Conformities
| Conformities and applied standards | |
|---|---|
| Markings |  |
| EU guidelines | 2014/30/EU EMC directive 2014/35/EU Low voltage directive |
| Harmonised standards | EN 61000-2 Electromagnetic immunity EN 61000-3 Emission limits EN 61010-1 Safety requirements for electrical equipment for measurement, control and laboratory use EN 61326-1 Electrical equipment for measurement, control and laboratory use - EMC requirements |
| Tunnel safety | RVS 09.02.41 2014 RABT 2006 |
| Lighting standards | CIE 88:2004 CEN report CR14380 |