CEMB S.p.A. - 23826 MANDELLO DEL LARIO (LC) I - Via Risorgimento 9 Tel. (+39)0341/706.111 - Telefax (+39)0341/735.678 www.cemb.com e-mail: [email protected] FUNCTION The transducer T5-LVDT/25/24 is used for performing the measurement of Absolute Displacement, the measurement is made by means of a position transducer system based on a linear variable differential transformer (LVDT) by mounting the transducer body on a fixed point and positioned so that the sensor tip of transducer T5-LVDT/50 presses permanently against one end of the movable part of the machine casing. The as picked-up signal is sent to the adapter part AD1-BOX (signal converter situated downstream of the transducer), which makes it suitable for processing by one CEMB T5 unit. PRINCIPLE OF OPERATION A rod in close contact with the movable part to be checked is strictly integral with a magnetic core moving within a fixed coil inside the transducer sensor body. The coil has one primary winding and two secondary windings connected in opposing phase; the output signal (secondary winding) is proportional to the mechanical displacement of the core and should, therefore, be sent to an adapter module (AD1) which makes it suitable for subsequent processing by CEMB instruments, of the “T” series.

TECHNICAL CHARACTERISTICS The sensor part carries a removable cover at the top. After removing this cover, it is possible to read the mechanical value of turbine casing expansion on a graduated scale.

TRANSDUCER POSITIONING Refer to drawing Nr. 55348. FOREWORD The sensor part carries a removable cover at the top. After removing this cover, it is possible to read the mechanical value of the displacement on a graduated scale. The transducer tip is fitted with a protective cap to protect against damage during transport. Hence such cap should be removed during assembly. The tip is held firmly in contact with the movable part of an internal spring device which also provides a preloading stroke of 3.0 mm of the tip. OPERATIONS TO Remove the protective cap from the tip and separate the sensor part...