T/LUM
Photometer to measure the luminance in the access zone, threshold zone and interior zone of tunnels. Includes a zoom lens to adjust the focus areas.
Description
Luminance measurment
The requirements for tunnel lighting are determined by the nature of the human eye. 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 by day the human eye needs to adapt to the lower lighting levels in a tunnel. The threshold lighting needs to be controlled such that drivers can perceive obstacles in the tunnel early enough to stop the vehicle.
The 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. Luminance is the measure representing what a human being perceives as brightness and as such is the main control variable for the tunnel lighting.
Tunnel lighting needs to be adapted to these environmental conditions, following these national and international guidelines:
- CIE 88:2004 Guide for the lighting of road tunnels and underpasses
- CEN Report CR 14380 Lighting applications – Tunnel lighting
- DIN 67524 Beleuchtung von Straßentunneln und Unterführungen (DE)
- RVS 09.02.41 Tunnelausrüstung Lichttechnik Beleuchtung (AT)
If measurement of luminance is designated, luminance meters are deployed in front of the tunnel portal and inside the tunnel if necessary.
Features:
- Zoom lens to adjust the focus areas
- Sensor with V(λ) filter and silicon photo element
- Temperature compensated and long term stable amplifier for the photoelectric current using live zero
- Heated housing IP 67 made from stainless steel 1.4404
- Electronically controlled heating and temperature monitoring
- Mounting flange to adjust horizontal and vertical angle
- Fault indication by relay isolated (NC)
- Optional second outut channel for increased resolution at low lighting levels
- Surge protection
System:
- Lumincance meter for measuring luminance in access zone L20 mounted on a pole at tunnel entry
or - Luminance meter for measuring luminance in threshold zone Lfe mounted on the tunnel wall
or - Luminance meter for measuring luminance in interior zone Lfi mounted on the tunnel wall
- Power supply 230 or 115 VAC
- Signal outputs connected to lighting control system or tunnel control system
Advantages:
- Specifically deigned for tunnel applications
- Customisable measuring ranges
- Same luminance meter for all measuring ranges and applications
- No moving parts
- Sensor is easy to remove out of housing withoot any tools
- Housing resitant against corrosion, UV, oil and acid
Technical Specifications:
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| Type | t/LUM-A1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Measured value | Luminance | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Measuring range 1 | Customisable, typically 0 .. 10.000 cd/m² oder 0 .. 6.000 cd/m² | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Angle of view | 8° .. 34° | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Analogue outputs | 1 x 4 – 20 mA for each measuring range | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Relay contact | 1 x operation (closed) / fault (open) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| LUMINANCE METER WITH 2 ANALOGUE OUTPUT | |
|---|---|
| Type | t/LUM-A2 |
| Measured value | Luminance |
| Measuring range 1 | Customisable, typically 0 .. 10.000 cd/m² oder 0 .. 6.000 cd/m² |
| Measuring range 2 | Customisable, typically 0 .. 1.000 cd/m² oder 0 .. 600 cd/m² |
| Angle of view | 8° .. 34° |
| Analogue outputs | 2 x 4 – 20 mA (1 for each measurung range) |
| Relay | 1 x operation (closed) / fault (open) |
| POWER SUPPLY | |
|---|---|
| Operating voltage | 230 VAC / 50 Hz ± 10 % (115 VAC / 60 Hz ± 10 %) |
| Power consumption | approx. 50 W |
| HOUSING AND INSTALLATION | |
|---|---|
| Dimensions | 245 x 180 x 485 mm (polycarbonate) 200 x 180 x 450 mm (stainless steel) (withou mounting flange) |
| IP rating | IP 67 |
| Materials | Polycarbonate MAKROTECH UV® or stainless steel V4A 1.4571 (both ZTV-ING Anforderungsklasse I) |
| Mounting accessory | Mounting console (adjustable) Mounting console with mast clamps |
| CONFORMITIES | |
|---|---|
| Electrical standards | 2006/95/EG Niederspannungsrichtlinie (LVD) 2004/108/EG Elektromagnetische Verträglichkeit (EMV) IEC 61326-1:2012 IEC 61010-1:2010 |
| Tunnel safety | AT: RVS 09.02.41 2009 DE: RABT 2006, DIN 67524-2 CH: ASTRA FHB BSA |
| Lighting technology | CIE 88:2004 CEN Report CR 14380:2003 |
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