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Siemens SITRANS LG270 Operating Instructions Manual
Also see for SITRANS LG270: Operating instructionsOperating instructionsOperating instructionsOperating instructions
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9PBD-51041064 SITRANS LG270 - Operating Instructions44293-EN-171021– Operating instructions SITRANS LG270– Instructions for optional instrument features– Ex-specific "Safety instructions" (with Ex versions)– If necessary, further certificatesInformation:In this operating instructions manual, the optional instrument featuresare described. The respective scope of delivery results from the orderspecification.3.2 Principle of operationThe SITRANS LG270 is a level sensor with cable or rod probe forcontinuous level or interface measurement, particularly suitable forapplications in high temperatures up to +450 °C (842 °F).High frequency microwave pulses are guided along a steel cable ora rod. Upon reaching the product surface, the microwave pulses arereflected. The running time is evaluated by the instrument and output-ted as level.dh1Fig. 2: Level measurement1 Sensor reference plane (seal surface of the process fitting)d Distance to the levelh Height - LevelHigh frequency microwave impulses are guided along a steel cable orrod. Upon reaching the product surface, a part of the microwave im-pulses is reflected. The other part passes through the upper productand is reflected by the interface. The running times to the two productlayers are processed by the instrument.Application areaFunctional principle -level measurementFunctional principle - in-terface measurement |
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