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Pulse width : 25 ns to 350 ns adjustable
Decrease time : 10 ns from 90 to 10 %
The Receiver Circuit:
Bandwidth : 500 kHz to 20 MHz
Linearity : +/- 0.5 dB on the range 0 to 70
dB
Precision : +/- 0.5 dB on the range
D.A.C : gain correction from 0 to 70 dB
Programmable filters : 0.5, 1, 2, 4, 10, and broadband
20 MHz and 15 MHz
Gain : 0 to 70 dB adjustable, step : 0.1
dB
Input impedance : 50 Ω􀀀
Rectification : positive, negative or full wave
Measurement mode : reflection or transmission
Visualization : ASCAN, Filter ASCAN,
Retention, HF
The PC Instrument Case
The PC Instrument with easy programming
and clear visualisation
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ELISA NDT
5
EASY PROGRAMMING AND COMPREHENSIVE VISUALISATION
The PC software has been conceived to offer all the tuning capabilities required to program the parameters of a
scan by transmission . The screen ( see figure) displays clearly all the values of the operation .
PROGRAMMING AND VISUALISATION SCREEN
VISULISATION MODE WITH A RECALLED TRACE
HF VISUALISATION MODE
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ELISA NDT
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TRANSDUCERS
2 identical transducers are delivered specially chosen
for their performance in carbon damage
assessment.
SPECIFICATIONS
Direct contact.
Normal beam transducer.
Longitudinal wave.
Removable delay line.
Element diameter : 0.250’’ (6,35 mm) or larger
according to request
Frequency : 10 MHz
Medium bandwidth.
Thickness range : 0.006’’ to 0.500’’ (0.15 mm to 12.70
mm)
Connector : Microdot
Cables
Two cables are provided.
Specifications :
Cable : RG174 – impedance 50
Length : 6 Ft ( 1.8 m)
Connector 1 : Microdot (transducer)
Connector 2 : SMB (board).
COMPOSITE THICKNESS CALIBRATION SPECIMENS IN THE ELISA KIT
It is possible to offer the ELISA with a
complementary part of essential parts as a kit of carbon
part thickness specimens to allow easy calibration of
signals in terms of thickness.
The specimens made of laminates of carbon plies are
specified in ply numbers.
Each laminate specimen represents the structure as it
could appear to the operator:
- plain carbon,
- carbon with paint primary,
- carbon with paint,
- carbon with bronze grid.
Also sandwich specimens represent a structure with a
central debonding defect.
Two specimens are delivered painted, with and without
bronze metallisation grid
MOre details are given in the next chapter
The set of laminate specimens with sensor
Above , the set in a nice transport case .The
set is packaged in a case as above when sold
separately from the complete Elisa Console.
A full set of necessary accessories
The ELISA is built according to the same principle
as other repair equipment from GMI; which is to
offer all the equipment and accessories for an
operator to be independent in the field or in the
workshop.
One will find below the list of these accessories
- lamp,
- rectified rule,
- set of thickness gages,
- scissors,
- magnifier,
- water bottle,
- pissette,
- couplant,
- manual tap tap,
HOW TO ORDER :
- Complete Console with Set of Thickness Carbon
Specimens ( ATR structure Representative, described
hereafter)
P/N: GMIUCS87B02-42
- Complete Console without Set of Thickness Carbon
Specimens ( ATR structure Representative, described
hereafter)
P/N: GMIUCS87B02-00
COMPOSITION OF ELISA FULL KIT
- The ultrasonic instrument in a PC reinforced Laptop
- 2 sensors at 10 MHZ
- Set of accessories as above
- Methodological Manual
- In option,the Kit of Thickness Specimens as described
below.
-Dimensions: 100 x 45 x 20 cm
-Weight 25 Kg
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ELISA NDT
9
CARBON STRUCTURE THICKNESS CALIBRATION SPECIMENS
The Kit is built as a formidable set of carbon structure thickness specimens to allow reliable calibration of
ultrasonic signal characteristics in order to interpret nature and position of damages .
During the process of damage assessment by ultrasonic evaluation, it is necessary to produce a reference for
the position and amplitude signal for the back echo. This reference will serve for the interpretation of the
position and amplitude of the actual signal send back by the structure analysed.
Thus, the necessity to provide part specimens representative of the thicknesses met on composite structures
of aircrafts.
In this respect, the specimens are manufactured with materials as the ones used on the usual structures :
　
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