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Assessment of Horizontal Linearity

UT Model Date

UT Serial # Technician

Probe Model Probe Frequency

Probe Serial # an!e

"$ Actual Position % $rror &om'ly ( )%

) #DIV/0! #DIV/0!

* #DIV/0! #DIV/0!

+ #DIV/0! #DIV/0!

, #DIV/0! #DIV/0!

- #DIV/0! #DIV/0!

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TheoreticalPosition

0 2 4 6 8

0

2

4

6

8

10

12 Theoretical

Actual

Actual

   T   h  e  o  r  e   t   i  c  a   l

Procedure

(a) For ranges up to 100 mm.Use Step Wedge or V1 Bloc lace t"e proe on t"e loc and ad$ust t"e t%me ase so as to produce se&eral mult%ple ec"oes '%t"%n t"e c"osen range t"e preerec"oes.() Sett%ng t"e t%me ase.,'o o t"e repeat ec"o s%gnals s"all e set to co%nc%de '%t" appropr%ate scale d%&%s%ons e.g. %n a +-ec"o d%spla c"oose t"e 1st and td%spla c"oose t"e 1st and rd ec"oes. ,"e rema%n%ng ec"oes s"ould t"en co%nc%de '%t" t"e%r ass%gned pos%t%ons.(%e % us%ng 0mm step 2c"o 1 s"ould read 0mm and ec"o * s"ould read 30mm)(c) Sett%ng t"e ga%n.Success%&e ec"oes s"ould e roug"t to t"e same ampl%tude %.e. 30 percent o ull screen "e%g"t '"en measur%ng t"e%r pos%t%on aga(d) 4ecord%ng and plott%ng o results.4ecord t"e actual ec"o pos%t%on on t"e screen and t"eoret%cal pos%t%on %s ao&e tale.(%e % us%ng 0mm step ,"eort%cal pos%t%ons s"ould e 0mm*0mm50mm30mm100mm)

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10 12

red numer e%ng * or +

"e *t" ec"oes and %n a *-ec"o

%nst t"e grat%cule.

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Assessment of 2ertical Linearity

UT Model Date

UT Serial # Technician

Probe Model Probe Frequency

Probe Serial #

Hn H3n4)5 Hn 6 H3n4)5  6B

#DIV/0! 7 8

#DIV/0! 0 #DIV/0!

#DIV/0! ### #DIV/0!

#DIV/0!

#DIV/0! - dB 9 dB

#DIV/0! :

#DIV/0! 0 #DIV/0! 0

#DIV/0! ### #DIV/0! 100

#DIV/0! 0 #DIV/0! 0

#DIV/0! ### #DIV/0! 100

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0.8 1.8 2.8 3.8 4.8 5.8 6.8 7.8

0

10

20

30

40

50

60

70

80

90

100

 

Hn / H(n+1)

   H  n

Procedure(a) ,urn all access%le suppress%on and/or s'ept ga%n controls to t"e ;o< pos%t%on.() Select a test range o appro:%matel +0 mm and place t"e proe on +mm t"%cness.(c) Select a ac ec"o (t"e nt" ec"o) '"%c" %s ad$acent to t"e centre o t"e screen and ad$ust t"e ga%n so t"at %ts "e%g"t(d) =easure and record t"e "e%g"t o t"e ne:t succeed%ng ac ec"o ("(n 9 1)). 4epeat t"%s procedure ad$ust%ng t"e gapercent o grat%cule "e%g"t.

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:

#DIV/0!

#DIV/0!

#DIV/0!

#DIV/0!

8.8 9.8

D

at

a

A

B

-2

d

B

+

2

d

B

("n) %s 10 percent o grat%cule "e%g"t.  %n so t"at "n %s %ncreased 10

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