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| | | Tank Level Indicating Systems | | |
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| | | Installation and Maintenance | | |
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| | | The transmitters can be installed from outside through the tank top or tank bottom by using a mounting plug or flange. The mounting position is vertical with a maximum angle of inclination of 30 degrees. The level sensor and additional instruments are maintenance free in applications in clean media. The maintenance of the level sensor consists of an occasional „wipe-off" cleaning from time to time in excessively contaminated liquids. For the sensor connection shielded cable or wiring is recommended but not necessary. The level sensors are available with terminal box, plug or PVC-cable. If the distance between sensor and display exceeds 15 m, a 4...20 mA 2-wire connection should be used for signal transmission (please see also page 18 / 19: Transducer). The cable length between sensor and receiver can be up to five kilometers using a transducer, depending on the cable diameter. Fig. 4 shows a typical application with pump control, additional display and recorder. | | |
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| | | Fig. 4 | | |
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| | | Technical Advantages | | |
| | | Constant level monitoring with <0,5 mm repeatability. | | |
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| | | • Independent on foam formation, variable dielectric, conductivity, pressure and temperature of the liquid. | | |
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| | | • Remote level indication via extremely long cables between le\ Indicating system and level sensing element (container). | | |
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| | | • Interfacial level indication possible by different float weights. | | |
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| | | • Linear level indication independent of the shape of the container by transducer linearization via PC. | | |
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| | | • The level sensors can be inserted in protection and bypass tubes in extremely turbulent or contaminated liquids. | | |
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| | | • Continuously adjustable setting of the electronic maximum and minimum level value relays without moving the float or filling / emptying the container. | | |
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| | | • Dotted line industrial recorders, trip amplifiers and other additional instruments can be connected to the level indicating system with analog output. | | |
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