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VICOTEC450
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Extractive visibility measurement The VICOTEC450 offers optimal solution for visibility measurement if
- fixtures in the tunnel tube are not permitted or not possible due to lack of space
- fog should not be included in the visibility measurement
The VICOTEC450 regularly and automatically carries out a functional test including the control point, zero point, the function of the laser and receiver as well as the contamination of the optical surfaces.
Maintenance requirements for cleaning and filter exchange are automatically registered and signalled in good time by the VICOTEC450 due to contamination monitoring of the front panel and measurement of the air flow rate (optional). |
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| Technical specification |
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Measuring values |
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Visibility |
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Measuring range |
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0
15 1/km |
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Repeatability |
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±2 % of measuring range |
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Measuring principle |
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Laser light forward scattering below 25°
in the extracted heated air |
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Ambient temperature |
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30
+55 șC |
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Protection category |
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IP 66 |
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Measured value output |
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0
20 mA |
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Interfaces |
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USB, RS232
option: Profibus DP (uni-directional), LAN, RS485, RS422, fibre optics |
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Status-/control signals |
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5 relay outputs, 2 analog inputs, 4 digital inputs
optional: modules for further inputs and outputs |
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System components |
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Measurement unit VCME with integrated suction, control unit MCU |
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Test function |
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Automatic self test for linearity, contamination, drift and aging |
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Remarks |
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The VICOTEC450 draws air from inside the tunnel, heats it over the dew point and determins the visibility by using scattered light technology. |
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Tunnel Sensors
VICOTEC450;)
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