Vsec

Vrms

Vout

+5

P

d=-100mm

d=+100mm

d=0

+0.1d

-0.1d

+10Va

Vb

XX

1s+

A-308Signal Conditioner / Demodulator

for LVDT sensors

The A-308 is a high accuracy, low cost signal conditioner board, for use with most commercial LVDT sensors for accurate distance/position measurement. Its small size and high accuracy makes it and ideal solution for various applications.

FEATURES

Small size

No adjustment required

High linearity: 0.05%

Low drift:<50ppm /C of F.S.

High frequency response: up to 20 KHz

Operates with remote sensor: up to 100m

DC output proportional to position

Single or dual supply voltage

Built-in controls of frequency, filter offset, gain, excitation

APPLICATIONS

Linear displacement measurement

Dynamic position measurement

Vibrations

50mm

50m

m

4/5/6 WIRES

36.2

5m

m

45mm

5/6 WIRES

18mm

46m

m

5/6 WIRES

Vsec

Vrms

Vout

+5

P

d=-100mm

d=+100mm

d=0

+0.1d

-0.1d

+10Va

Vb

XX

1s+

Head office: 33 Hayetzira st. Ramat-Gan 52521, ISRAEL,Tel:972-3-5756327/8 Fax:972-3-5756326

U.S.A office: 9 Blossom Drive, Kennett Square, PA19348, Tel:(302)478-2881 Fax:(610)444-5544

DEMODULATOR

Bandwidth up to 20KHz.

Linearity better than 0.05% of FS

Gain drift 50ppm / C of FS max.

Offset drift 50ppm / C of FS max.

Output Unipolar or Bipolar

LVDT sensor type Any sensor with 1Excitation coil and 2 output coils

Supply voltage ±15V

Output voltage ±11V

GENERAL

Primary to secondary phase shift

Insensitive

Transducer null voltage Insensitive

Transducer cable length up to 30m.

Output cable length up to 100m.

EXCITATION

Excitation range 3-20 V RMS

Excitation T.C. 600 ppm / C max.

Excitation voltage reject. 100 ppm / dB

Output current 30 mA RMA

Frequency range 60 mA

Excitation frequency T.C. 20-20000 Hz (with component change)

THD -50 dB

POWER SUPPLY

Voltage range ± ±7V / to 18V

Current (@ no load) 18 mA

Temperature range 0-70 C

Ordering Information:A-308- 5-3000W-

Size: W=wide board with frequency screw terminal T = Tiny board with soldering pins Excitation

Frequency

Technical Specifications Connection Diagram

Side Cap

Steel Housing

Core

Secondary Winding A

Secondary Winding B

Primary Winding

Coil Form

5/6 WIRES

LVDT SENSOR

OUT

GND

Va

Vb

EXC1

EXC2

C4

C3

C1 C2

U2

LVD

T

POWERSUPPLY

GN

D

+15V

-15V

GAIN

EXCITATION

OFFSET

4/5/6 WIRES

Va

GND

Vb

EXC1

EXC2-15V

LVD

T

C3

+

+C2

C1

R4

R3

R2

R1

+15V

OUT

U1

5/6 WIRES

LVD

T

12

OUT

GND

Va

GND

Vb

EXC1

EXC2

++

C4

C3

C1 C2

J1

U2

U1

POWERSUPPLY

GN

D

+15V

-15V

GAIN

EXCITATION

OFFSET

No. of Wires