Detailer Calibration of the Cylinder Barrel Tester

(2) Specific

application

part

No.

(b) Plug the reflectoscope into a 115 volt

10865297 cylinder (thick

wall cylinder

with

10 volt, 50 / 60 cycle single phase power

source. Turn the POWER (SCALE ILLUM)

groove in periphery of mounting flange). T h e

reflectoscope, search unit fixture, and master

knob

clockwise

and

allow

time

for

warm-up

combination provides a

checking

cylinder

(approximately

10-15

minutes).

specific functional detection method. The pulser

sweep

delay

(upper

left

of the reflectoscope transmits short bursts, or

hand

control panel).

pulses, of electrical energy through a cable to the

(1) T u r n

the

SWEEP

DELAY

knob

search unit fixture at which point these pulses

(red) clockwise to "1".

are routed to the piezoelectric probe. The probe

(2) A d j u s t

the

SWEEP

DELAY

knob

changes

the

electrical

pulses

into

ultrasonic

(inner black) to adjust the initial pulse wave over

energy and transmits them through the trans-

the left hand vertical division marker on the

mitting medium (water) into and through the

display

screen.

cylinder barrel wall, toward the outside diameter

(3) Place the SWEEP toggle switch to

of the aluminum muff or crack, and back by the

"PRESET".

same route to the probe. The probe then changes

(4) P l a c e

the left hand INCH-

DIV

lever

"2",

and,

place

the

right

the ultrasonic energy into electrical pulses which

are transmitted by cable back to the reflec-

hand lever to "1".

toscope where a characteristic wave form is

(5) T u r n t h e M A R K E R S k n o b ( r e d )

in the screen. Additionally, the

displayed

counterclockwise to "OFF".

reflectoscope embodies an alarm system which

(6) Turn theALT.

DISPLAY

SHIFT

may be set to a specific level, to signal when the

VERT

screw

fully

counterclockwise.

crack or flaw is detected in the cylinder.

(d) Pulser / receiver unit adjustment.

d. Detailer Calibration of the Cylinder Barrel

(1) P l a c e

the

TEST

switch

Tester.

"NORMAL".

(1) G e n e r a l . T h e f o l l o w i n g a d j u s t m e n t s

(2) T u r n

the

FREQUENCY

knob

apply to a new tester. Once these adjustments

"5.0".

(3) P l a c e t h e S E N S I T I V I T Y s w i t c h t o

have been made, they will seldom require

readjustment under normal conditions. Should

"X1" and turn the SENSITIVITY control knob

the inspection procedure reveal an abnormally

to "1".

high cylinder reject rate, the tester adjustments

(4) Turn the REJECT knob coun-

should be checked to be certain the readings are

terclockwise to "OFF".

correct. However, it is good practice to check all

(5) T u r n t h e P U L S E

LENGTH

knob

adjustments

periodically

insure

against

ac-

so that the dot is at the "12:00 o'clock" position.

cidental tampering. The reflectoscope cover and

(e) Display screen adjustment.

(1) T u r n

search fixture probe protector should be in place

the POWER (SCALE

whenever the tester is not in use.

ILLUM) knob counterclockwise, but not

Note. The cylinder barrel tester should not

"OFF".

be operated in close proximity to electrical

(2) Place

the

GATE

OFF

switch

appliances, or false alarming may result.

"GATE

OFF".

(2) Establish

the

wave

form

the

(3) Adjust the VERT screw to place

reflectoscope display screen and set the alarm.

the horizontal wave form line on the zero

(a)

Remove

the

cover

from

the

reflec-

horizontal scale line (view A, fig. 53).

toscope.

6-61