1. CHARACTERISTICS:-_ PRESENTED BY SANJEEV RATHORE S.S.E.(PWAY/USFD/DHG
9/16/2018
CHARACTERISTICS:-_
THE PERFORMANCE OF AN ULTRASONIC FLAW DETECTOR,THE FOLLOWING IMPORTANT CHARACTERISTICS ARE STUDIED IN DETAIL IT HAS BEEN DISCUSSED AS PER IS: TO VERIFY THE SUITABILITY OF EQUIPMENT&PROBES
LINEARITY OF TIME BASE(UFD)
LINEARITY OF AMPLIFICATION(UFD)
DEAD ZONE(UFD)
RESOLUTION(UFD)
MAXIMUM PENITRATION POWE(UFD)
PROBE INDEX(PROBE)
PROBE ANGLE.(PROBE)
PRESENTED BY
SANJEEV RATHORE
S.S.E.(PWAY/USFD/DHG

2. PRESENTED BY SANJEEV RATHORE S.S.E.(PWAY/USFD/DHG
9/16/2018
1.LINEARITY OF TIME BASE
THIS INVOLVE THE MEASUREMENT OF SUCCESSIVE BOTTOM ECHOES FROM A TEST BLOCK OF A KNOWN LENGTH ON HORZONTAL SCALE OF CRT.THE DISTANCE BETWEEN TWO SUCCESSIVEE CHOES SHOULD BE CONSTANT.
LINEARITY OF TIME BASE DEPENDS ONLY UPON FLAW DETECTOR
PROBE USED=0DEGREE
MODE=SINGLE CRYSTAL
FREQUENCY=2MHZ
DIA=20X20
RANGE=100/500
REMARK=FOR RANG 100MM,PROBE USED ,ANY DIA &ANY FRQUENCY
CONTINUED…….. …………

3. PRESENTED BY SANJEEV RATHORE S.S.E.(PWAY/USFD/DHG
LINEARITY OF TIME BASE
PROCEDURE
PLACE THE PROBE ON TEST BLOCK AT PROPER POSITION
SET FIRST AND LAST ECHO AT START &LAST OF CRT SCREEN
READ THE OTHER INDICATION WITH PARTICULAR
APPLY THE FORMULA
.amax .100
.8b
.amax=maximum deviation=1.1(suppose)
B=full scale time base=500mm
ALLOWED LIMITS=
ANALOGUE=+/--2.0%
DIGITAL=+/ %
A POSITION=FOR 100MM RANGE
B POSITION-FOR 500MM RANGE
9/16/2018
PRESENTED BY SANJEEV RATHORE S.S.E.(PWAY/USFD/DHG

4. 2.LINEARITY OF AMPLIFICATION
IT DEPENDS UPON THE FREQUENCY,OF PROBE,GAIN,RANGES&TIME BASE
PROBE=0 DEGREE,2MHZ,SINGLE CRYSTAL
RANGE=250/500
PROBE DIA=20x20
PROCEDURE
PLACE THE PROBE AT POSITION “A”(250 RANGE)
PLACE PRFOR TIME BASE 250M.M. RANGE
OBE AT POSITION “B”(500MM RANGE)
SELECT ANY SIGNAL&SET IT TO FSH ON VERTICAL SCALE
REJECTION SHALL BE MINIMUM
OBSERVE THE HEIGHT OF FOLLOWING ECHO(LET IT BE h-1)
9/16/2018
PRESENTED BY SANJEEV RATHORE S.S.E.(PWAY/USFD/DHG

5. 7.REDUCE THE GAIN TO GET OF 50% OF SELECTED SIGNAL 8.APPLY THE FORMULA
PRESENTED BY SANJEEV RATHORE S.S.E.(PWAY/USFD/DHG
9/16/2018
7.REDUCE THE GAIN TO GET OF 50% OF SELECTED SIGNAL 8.APPLY THE FORMULA
h1-2h2)X100 h1
ALLOWED LIMIT
+5%=ANALOGUE
+3%=DIGTAL
(SELECT ANY TWO ECHOES& SET 1ST PEAK FSH AND READ 2ND PEAK, IT IS =h1 THEN REDUCE 1ST PEAK AT 50% AFTER READ 2ND PEAK IT IS=h2)

6. (3)CHECKING OF DEAD ZONE
IT IS THE CHARACTERISTIC OF THE PROBE
DEAD ZONE IS THE AREA JUST BELOW THE PROBE FROM WHERE SIGNAL DOES NOT REFLECTED BACK
IT IS DUE TO INTERFERENCE OF THE SOUND WAVE
PROBE=0DEGRE,2MHZ,SINGLE CRYSTAL,20X20DIA
RANG=100M.M.
PRESENTED BY SANJEEV RATHORE S.S.E.(PWAY/USFD/DHG
9/16/2018

7. SHOW FIGURE :DEAD ZONE
OBSERVE THE REFLECTEDSIGNAL FROM POSITION”A”&”B”
FOR SINGAL CRYSTAL;DEAD ZONE=6-7M.M.&FOR DOUBLE CRYSTALPROBE DEAD ZONE=2-3M.M.
USED STEP GAUGE
PRESENTED BY SANJEEV RATHORE S.S.E.(PWAY/USFD/DHG
9/16/2018

8. 4.RESOLVING POWER IT DEPENDS UPON BOTH THE PROBE&FLAW DETECTOR
PRESENTED BY SANJEEV RATHORE S.S.E.(PWAY/USFD/DHG
9/16/2018
4.RESOLVING POWER
IT DEPENDS UPON BOTH THE PROBE&FLAW DETECTOR
IT DETERMINES THE CAPABILITY OF THE EQUIPMENT TO IDENTIFY TWO NEAR BY FLAWS
PROBE=0DEGREE,SINGLE CRYSTAL,20X20 DIA PROBE
RANGE=100M.M.
SET THE PROBE TO ADJUST TWO SUCCESSIVE ECHOES OF SAME HEIGHT
INCREASE THE GAIN(MORE THAN 50% HEIGHT SHOUID NOT BE JOINED &SEPERATED AT LEAST 6db
TWO ECHO APPEARS ON 85&91 M.M. ON HORIZONTAL SCALE

9. PRESENTED BY SANJEEV RATHORE S.S.E.(PWAY/USFD/DHG
9/16/2018
RESOLUTION

10. 5.MAXIMUM PENETRATION POWER
PRESENTED BY SANJEEV RATHORE S.S.E.(PWAY/USFD/DHG
9/16/2018
5.MAXIMUM PENETRATION POWER
IT IS THE ACCESSIBILITY OF SOUND TO PENETRATE INTO THE MAYERIAL
IT IS DEPENDS UPON THE INSTRUMENTS& PROBE
PROBE=0DEGREE,2MHZ,SINGLE CRYSTAL,20X20 DIA
RANG =500M.M.
PLACE THE PROBE ON PERSPEXOF TEST BLOCK
APPLY THE MAXIMUM GAIN & REJECTION MINIMUM
APPEARS FIVE FULL ECHOES& SIXTH ECHOES MAY APPEAR

11. FIG:PENETRATION POWER
9/16/2018
PRESENTED BY SANJEEV RATHORE S.S.E.(PWAY/USFD/DHG

12. PRESENTED BY SANJEEV RATHORE S.S.E.(PWAY/USFD/DHG
9/16/2018
6.PROBE-INDEX
IT IS THE MARKING ON THE PROBE FROM WHERE CENTRAL BEAM EMERGES OUT
IT IS THE POINT FROM WHERE ANGLE OF BEAM NCAN BE DETERMINED
PROBE =ANY PROBE
RANGE= ANY RANGE
THE PROBE IS KEPT ON THE BLOCK AS SHOWN FIG.
THE BEAM PATH SHALL BE TOWARDS THE CURVED SURFACE OF THE BLOCK
MOVE THE PROBE TILL MAXIMUMHEIGHT OF THE ECHO IS ACHIEVED
OBSERVE THE INDEX MARKINGWITH MARKING ON TEST BLOCK(SET BEAM PATH=100M.M. FOR ANY PROBE)

13. FIG: PROBE INDEX PERMITTED RANGE=+1M.M.
9/16/2018
PRESENTED BY SANJEEV RATHORE S.S.E.(PWAY/USFD/DHG

14. 7.PROBE ANGLE PERMITTED RANGE=+1DEGREE
PRESENTED BY SANJEEV RATHORE S.S.E.(PWAY/USFD/DHG
9/16/2018
7.PROBE ANGLE
THE BEAM ANGLE DEPENDS UPON THE PROBE
IT IS THE ANGLE WHICH THE SOUND WAVE TRANSMITTING INTO THE MATERIAL.
PROBE=ANY PROBE
RANG =ANY RANG
PUT PROBE AT ANGLE MARKED IN IIW BLOCK
SET PEAK AT MAX.
READ ANGLE DIFFERENCE
ANGLE DIFF.&LOCATION ERROR
+0.5DEGREE=+3.1M..
+1.0DEGREE=+6.1M.M.
+2.0DEGREE=+12.3M.M.
PERMITTED RANGE=+1DEGREE

15. PRESENTED BY SANJEEV RATHORE S.S.E.(PWAY/USFD/DHG
FIG:PROBE ANGLE
9/16/2018
PRESENTED BY SANJEEV RATHORE S.S.E.(PWAY/USFD/DHG

16. CHARACTERISTICS PROBE ANGLE PROBE INDEX LIMIT=+\-1M.M.
PRESENTED BY SANJEEV RATHORE S.S.E.(PWAY/USFD/DHG
9/16/2018
CHARACTERISTICS
LINEARITY OF TIMEBASE
(FORMULA=amax.100
.8b
Limit=+\-1.25%
LINEARITY OF AMPLIFICATION
Formula =(h1-h2).100 h1
Limit=+\-3%
CHECKING OF DEAD ZONE
S\L PROBE=7M.M.
D\CPROBE=3M.M.
RESOLUTION POWER
D1=85M.M.
D2=91M.M.
PENETRATION POWERF
FIVE FULL ECHOES&SIXTH APEARING ON 23M.M. PERPEX
PROBE INDEX
LIMIT=+\-1M.M.
PROBE ANGLE
LIMIT=+\-1DEGREE

17. AASHUM ASHUM RATHORE ANUSHA SANJEEV PRERNA9/16/2018
PRESENTED BY SANJEEV RATHORE S.S.E.(PWAY/USFD/DHG
9/16/2018
AASHUM
ASHUM RATHORE
ANUSHA
SANJEEV
PRERNA9/16/2018