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Technical specification |
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Measuring values |
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flow velocity, air temperature |
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Measuring range |
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-20…+20 m/s (-65.6 ... +65.6 ft/s) |
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Measuring principle |
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Ultrasonic time-of-flight difference |
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Protection category |
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Sender/receiver unit: IP66
MCU: IP 65
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Measured value output |
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analog output: 0 / 2 / 4 ... 20 mA |
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Interfaces |
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USB/RS232 (service), RS485 (option), Ethernet (option) |
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Satus / control signals |
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5 relay outputs for status signals |
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System components |
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2 sender/receiver units, 2 mounting brackets, 1 evaluation unit, 2 connection boxes, 2 connection cables, mounting sets |
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Bus protocol |
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option: TCP/IP (Ethernet), Profibus-DP (RS485) |
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Remarks |
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It is important to measure the air velocity in a very representative way - i.e. cross the whole tunnel. This is the only way to ensure cost optimized ventilation control under normal conditions and safe operation during fires in tunnels. |
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