CEMB USA T7-LVDT-120-24 User Manual

CEMB S.p.A. - 23826 MANDELLO DEL LARIO (LC) I - Via Risorgimento 9

Tel. [phone] - Telefax (+39)0341/735.678

www.cemb.com e-mail: [e-mail]

TRANSDUCER T7-LVDT/120/24

FUNCTION

Transducer T7-LVDT/120/24 is used for measuring, through the position transducer system
with linear variable differential transformer (LVDT), the OPENING POSITION of steam
VALVES in a turbine; the measurement is performed by keying the transducer shaft
integrally with the valve opening control device in order to measure the rotation of
such device. The signal picked up should be sent to a measuring channel CEMB /T7 units
for processing.

PRINCIPLE OF OPERATION

Transformer T7-LVDT/120 allows transforming the rotational movement of the valve
control device into a linear movement measured by a magnetic core which is displaced
within a fixed coil in the transducer 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, therefore, to the angle
of rotation performed by the valve control device.

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TECHNICAL CHARACTERISTICS

Range of measurement : 0 to 120°

Sensitivity : 5 mV/°

Transformer LVDT : . Range = ±5.08 mm

: . Max linearity error = ± 0.5% f.s.

Range of application : . Temperature = -55°C to +95°C

: . Ambient = IP55 EN60529/10.90 standards

Composition : . Transducer T5-LVDT/25

Power supply : . Transducer = ± 15 Vdc, GND

Connection : . Transducer = connector 7-pin MIL C-5015
series 3106/16, standard kit
. Converter = connector 5-pin MIL C-5015
series 3106/16, standard kit

Conn. shaft diameter : Dia.6.0 h6 x L.18.0 mm

Outer casing material : Aluminium

Weight : Kg 8 approx.

Maintenance : none

: . Impedance, primary winding = 970 ohm/2500 Hz
: . Impedance, secondary windings = 1010 ohm/2500 Hz

: . Nominal sensitivity = 63 mV/mm
: . Frequency range = 50 Hz to 10 kHz
: . Supply voltage = 3 V rms (rated)

: . Humidity = max 95% not condensing
: . Vibrations = max 20 g / 2 KHz

. Converter AD1

. Converter AD1 = +15 to 24 Vdc, GND

Drawings enclosed : 61033 = Overall dimensions, mounting, connections

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