G-3080 LVDT Demodulator

The G-3080 module is used to demodulator the signal from a 5 or 6 wire LVDT (LVDT = "Linear Variable Differential Transformer" or "Linear Variable Displacement Transducer"...) sensors, for accurate displacement/position measurement, at frequencies up to 20KHz. The board is using a special ratiometric measurement circuit, which is insensitive to noise and Temp. drift problems, common to other measurement techniques.
The module consists of a LVDT excitation and a LVDT demodulator circuitry which together form a high speed displacement measurement system. With an appropriate sensor it can measure displacement as small as 1 micron and at frequencies up to 20 KHz.
The module is assembled from high linearity and low drift components, and operates with most common LVDT sensors.
The amplifier can be operated by batteries and it's output signal can be transferred to the data acquisition system via the AFL-500 Analog Fiber optic Link for complete isolation of the system:
AFL-500 Analog Fiber Optic Link

Specifications

Bandwidth
up to 20KHz
Primary to Secondary phase shift:
 
Excitation Voltage
 
Power Supply
 
Linearity
better than 0.05% of FS
Transducer null voltage:
Insensitive
Rejection
100ppm/dB
Voltage Range
±7V to ±18V
Gain Drift
50ppm/ºC of FS max
Transducer cable length:
up to 30m
Output Current
30mA RMS
Current (@ no load)
18mA
Offset Drift
50ppm/ºC of FS max
Output cable length:
up to 100m
Short Circuit Current
60mA
Temperature range
0-70ºC
Output
Unipolar or Bipolar
Excitation
 
Frequency Range
20-20000Hz (with component change)
 
 
LVDT sensor type
any 5 or 6 wire sensor
Excitation range:
3-20V RMS
Excitation Frequency T.C.
200ppm/ºC
 
 
Supply Voltage
±15V
Excitation T.C.
600ppm/ºC
THD
-50dB
 
 
Output Voltage
±11V
 
 
 
 
 
 


Block Diagram




For more information about our Amplifiers and Signal Conditioner products , please click here.

Analog Fiber Optic Links




For more information please contact us at:

Head Office: 33 Hayetzira St., Ramat-Gan 52521, Israel. Tel:972-3-5756327, Fax:972-3-5756326

USA office: 9 Blossom drive, Kennett Square, PA19348.  Tel: (302)478-2881 Fax: (610)444-5544

Please note: New USA address and new fax number.
E-mail:info@lab-systems.com

©Copyright 2000, A.A.Lab Systems Ltd.

Back to Home Page       Back to Products Page       Back to Previous Page