OKOndt GROUP Eddycon C Manual de usuario
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CONTENTS
P.
1 CONTROLLERS OF EDDYCON C FLAW DETECTOR ..........................................................3
2 SETTINGS OF «TEST» MENU ......................................................................................................5
3 INSTRUCTIONS FOR USE .............................................................................................................7
3.1 THRESHOLD LEVELS SETUP...............................................................................................7
3.2 SINGLE COIL PROBE ............................................................................................................10
3.3 REFLECTION, DIFFERENTIAL PROBE .........................................................................16
3.4 ROTATION PROBE................................................................................................................21
3.5 "CONDUCTIVITY" MEASUREMENT...............................................................................27
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1CONTROLLERS OF EDDYCON C FLAW DETECTOR
1.1 The flaw detector is operated by one operator who has a corresponding
level of qualification and has studied the present “Quick start guide”.
ASSIGNMENT OF KEYBOARD BUTTONS
-automatically puts a displayed signal from lift-off (or from any
interference) in horizontal position;
-in the mode of name editing –selects a digit/letter
-changes the parameter variation step;
-in the mode of name editing –selects a digit/letter
-increases the selected parameter;
-in the mode of name editing –selects a digit/letter
-changes the frequency;
-in the mode of name editing –selects a digit/letter
-moves up through the menu;
-in the mode of name editing –selects a digit/letter
-decreases the selected parameter;
-in the mode of name editing –selects a digit/letter
-cancels the selection;
-in the mode of name editing –selects a digit/letter;
-pressing the button results in displaying the firmware version
in"SETTINGS" menu;
-deletes point in “CALIBRATION" menu;
-freezes the display in the test menu
-moves down through the menu;
-in the mode of name editing –selects a digit/letter
-confirms the selection;
-in the mode of name editing –selects a digit/letter;
-pressing the button in "TEST" menu results in saving of current
setup as a default one (if the current item is above the ALARM item);
-adds point in “CALIBRATION" menu
-quick access to "TEST" menu
-quick access to "SETTINGS" menu
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-quick access to "VIEW" menu
-quick access to "MEMORY" menu;
-confirms the saving of the entered name of the file or folder while
operating in "MEMORY" menu
-quick access to "CALIBRATION" menu
-automatically sets the parameters of single coil (parametric) ECP
with switched on Single input;
-sets the number of rounds while operating with eddy current
rotary scanner
-switches On/Off the instrument
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2SETTINGS OF «TEST» MENU
FIGURE 1 - Settings of «TEST» menu
∎Navigation menu:
1. FREQ –test frequency. Operating frequency of ECP.
2. PRE AMP –preamplifier gain. It is used to amplify weak signals.
3. GAIN –main gain. It is used to amplify weak signals.
4. H GAIN –horizontal gain. It is used for visual separation: the signal
from the defect and the signals from the noises.
5. V GAIN –vertical gain. It is used for visual separation: the signal from
the defect and the signals from the noises.
6. DRIVE –probe drive level. It is used for electromagnetic field excitation
and formation of eddy currents in the object of testing. More often it is used the
voltage value of 4 V and 6 V is applied while carrying out testing through a layer of
nonconducting gap (for example –paint coating, etc.).
7. PHASE –phase adjustment. It is used for visual repositioning of eddy-
current signal in the complex plane.
8. FILTER –filter type. Filters are used to reduce various kinds of noise
and improve the quality of eddy-current signal for analysis.
AVRG –averaging filter (particular case of LP filter). It is used to reduce
noisiness and high-frequency noise impact. 17
LP –low pass filter. It is used to reduce noisiness of eddy-current signal and
filter out high-frequency noise.
HP –hight pass filter. It is used to filter out low frequency noise (eg - signals
that occur: 1) when changing the ECP turning angle at manual testing, 2) in case of
17
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changing the gap between ECP and the object of testing, 3) in case of change of
electromagnetic properties of the material, etc.).
BP –band pass filter. It is used to create bandwidth of useful eddy-current
signals - signals from defects and to filter out low-frequency and high-frequency
signals from noise. It is more often used at automated or mechanized testing with a
constant ECP moving speed relative to the object of testing.
9. POSITION –spot position. Changing the position of the center of the
complex plane on the screen of the flaw detector. It is used to increase the usable
space on the screen of the flaw detector.
Can be set in the following positions: –complex plane center, –in the
right center of the screen, –in the right upper corner, –in the upper center
of the screen, –in the left upper corner, –in the left center of the screen,
–in the left bottom corner, –in the bottom center of the screen,
–in the right bottom corner, –per-channel display when operating in double
frequency mode.
10. GRID –grid. Different types of the screen markup to improve the visual
analysis of signals.
11. AXIS –axis. On / off position of the display of coordinate axes on the
screen of the flaw detector.
12. ALARM –activation and setting of frames (threshold levels). Types of
frames: –frames are switched off, –circle frame type, –threshold frame
type, –sector frame type, –trapezium frame type.
13. SWEEP –number of points in a screen scan.
14. PROBE –type of connector.
Single (Lemo 00) –for connection and operation with single coil probe.
Refl (Lemo 16) –for connection and operation with Reflection type probe.
Bridge (Lemo 16) –for connection and operation with Bridge type probes.
15. RPM –rounds per minute for the eddy current rotary scanner.
16. ROT PRESENT –type of connected rotary eddy current scanner.
17. Parameters of the occupancy of the input circuit.
Parameter "T: …/…/..." shows:
1) The value of a signal amplitude at the input of the receiving circuit
expressed in % of the maximum possible;
2) Input circuit is not balanced, after performing the balancing in %.
Current value of the occupancy of the input circuit expressed in % of the
maximum possible.
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3INSTRUCTIONS FOR USE
3.1 THRESHOLD LEVELS SETUP
∎Setup of "Circle" type frame
To set up circle type frame, operator should select "Type: " in special item of
settings ALARM –.
FIGURE 2 –Setup of "Type: " of threshold level
"R:" parameter variation allows changing of the inner radius of threshold
level.
∎Setup of "Level" type frame
To set up threshold type frame, operator should select "Type: " in special
item of settings ALARM –.
FIGURE 3 –Setup of "Type: " of threshold level
"H:" parameter variation allows changing of the height of the threshold level.
R
H
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∎Setup of "Sector" type frame
To set up sector type frame, operator should select "Type: " in special item
of settings ALARM –.
FIGURE 4 –Setup of "Type: " of threshold level
"R:" parameter variation allows changing of the inner radius of threshold
level.
"W:" parameter variation allows changing of the width of threshold level.
"α:" parameter variation allows changing of turning angle of threshold level
relative to the complex plane center.
"β:" parameter variation allows changing of turning angle of threshold level.
Select the frame polarity "Pol:", which makes the alarm trigger:
–the signal gets beyond the limits of the threshold level;
–the signal is within the limits of the threshold level.
If the symmetrical displaying of threshold level on the position “Symm:” with
, buttons is required, this parameter can be activated.
∎Setup of "Trapezium" type frame
To set up trapezium type frame, operator should select "Type: " in special
item of settings ALARM –.
R
W
β
α
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FIGURE 5 –Threshold level setup of "Type: "
"X1:" parameter variation allows changing of the angle position of threshold
level in X1-direction.
"X2:" parameter variation allows changing of the angle position of threshold
level in X2-direction.
"Y1:" parameter variation allows changing of the angle position of threshold
level in Y1-direction.
"Y2:" parameter variation allows changing of the angle position of threshold
level in Y2-direction.
Select the frame polarity "Pol:" which makes the alarm trigger:
–the signal gets beyond the limits of the threshold level;
–the signal is within the limits of the threshold level.
Y2
Х2
Х1
Y1
3.2 SINGLE COIL PROBE
3.2.1 Connect the ECP to the flaw detector using a connecting cable.
№
Connecting cable
Connector to
Eddycon C
Connector
to ECP
Connector view
1
Lemo 00-Lemo 00
Lemo 00
Lemo 00
Lemo 00
2
Microdot
Lemo 00
Microdot/M5
Microdot
3
Lemo 00-BNC
Lemo 00
BNC
BNC
FIGURE 6 –Eddycon C eddy current flaw detector. Right side panel
Single coil
(parametric) eddy
current probe (ECP)
connector
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