l Serial numberl Technical datal Article numbers, documentationl SIL identification (with SIL rating ex works)With the serial number, you can access the delivery data of theinstrument via www.vega.com, "VEGA Tools" and "serial numbersearch". In addition to the type label outside, you can also find theserial number on the inside of the instrument.3.2 Principle of operationVEGAFLEX 65 is a level sensor with pipe probe for continuous levelmeasurement.It is designed for industrial use in all areas of process technology andcan be used in liquids.High frequency microwave pulses are guided along a steel rope or arod. Upon reaching the product surface, the microwave pulses arereflected. The running time is evaluated by the instrument andoutputted as distance.Four-wire electronics with separate power supply.The supply voltage range can differ depending on the instrumentversion.The data for power supply are specified in chapter "Technical data".Measured value transmission is carried out via the 4 … 20 mA/HARToutput separate from power supply.The background lighting of the indicating and adjustment module ispowered by the sensor. A certain level of operating voltage is requiredfor this. You can find the exact voltage specifications in chapter"Technical data".3.3 OperationThe instrument can be adjusted with the following adjustment media:l With indicating and adjustment modulel with the suitable VEGA DTM in conjunction with an adjustmentsoftware according to the FDT/DTM standard, e.g. PACTware andPCl with manufacturer-specific adjustment programs AMS™ or PDMl With a HART handheldApplication rangeFunctional principleVoltage supply8 VEGAFLEX 65 • 4 … 20 mA/HART - four-wire3 Product description31846-EN-120329