E 1135 - 97 Rtexmzutotc
E 1135 - 97 Rtexmzutotc
E 1135 - 97 Rtexmzutotc
Designation: E 1135 97
1. Scope
1.1 This test method describes the techniques for comparing
the brightness of the penetrants used in the fluorescent dye
penetrant process. This comparison is performed under controlled conditions which eliminate most of the variables present
in actual penetrant examination. Thus, the brightness factor is
isolated and is measured independently of the other factors
which affect the performance of a penetrant system.
1.2 The brightness of a penetrant indication is dependent on
the developer with which it is used. This test method however,
measures the brightness of a penetrant on a convenient filter
paper substrate which serves as a substitute for the developer.
1.3 The brightness measurement obtained is color-corrected
to approximate the color response of the average human eye.
Since most examination is done by human eyes, this number
has more practical value than a measurement in units of energy
emitted. Also, the comparisons are expressed as a percentage of
some chosen standard penetrant because no absolute system of
measurement exists at this time.
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
E 691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method2
E 1316 Terminology for Nondestructive Examinations3
3. Terminology
3.1 Definitions:
3.1.1 Definitions of terms applicable to this test method may
be found in Terminology E 1316.
1
This test method is under the jurisdiction of ASTM Committee E-7 on
Nondestructive Testing and is the direct responsibility of Subcommittee E07.03 on
Magnetic Particle and Penetrant Testing.
Current edition approved Feb. 10, 1997. Published April 1997. Originally
published as E 1135 86. Last previous edition E 1135 86 (1992)e1.
2
Annual Book of ASTM Standards, Vol 14.02.
3
Annual Book of ASTM Standards, Vol 03.03.
Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
E 1135 97
6.7 Silica Gel, for use as desiccant.
7. Sample Preparation
7.1 Sample PreparationNormally a set of samples of a
standard material must be prepared along with any test
(1)
FIG. 1 Turner Fluorometer, with Door Open Showing Sample Holder and Filters in Place
samples.
7.1.1 Pipet 1.0 mL of chosen penetrant into a 25-mL
stoppered volumetric flask.
7.1.2 Fill flask to line with methylene chloride, stopper and
mix. (If penetrant is not soluble in methylene chloride, use
acetone.)
7.1.3 Pour 10 to 20 mL of mixture into a 50-mL beaker.
7.1.4 Using forceps, dip 4 papers (cut to size for sample
holder in use), one at a time, into beaker, withdraw by drawing
across the lip of the beaker to remove excess liquid, and clip
into paper drying holder. Holder shall cover as small an area of
paper as possible.
7.1.5 Hang papers in a vertical position inside desiccator
until dry. This will require approximately 5 min at room
temperature.
where:
CL = the limits within which we can be confident the value
lies,
X
= the average of all readings,
t
= students t (values of which are given by statistical
manuals),
n = the number of readings used,
s
= the standard deviation determined by the equation:
( ~X 2 X!2
S5
(2)
n21
where:
X = the individual readings.
In this use, the 95 % confidence level (the value will lie within
the limits 95 % of the time) is sufficient. At this level, t for 4
samples is 3.182.
5.4.1 If the confidence limits of two material samples
overlap, the materials must be considered equal even though
the measured average values are different.
6. Apparatus
6.1 Filter Paper, Whatman #4, a fast, open structured paper.
6.2 Pipets, 1-mL capacity.
6.3 Volumetric Flasks, with stopper, 25-mL.
6.4 Paper Drying HoldersCrocodile type battery clips
2 in. long with 12 in. opening have been found satisfactory. Set
up holders to allow drying inside desiccator.
6.5 Methylene Chloride or Acetone, technical grade.
6.6 Desiccator, 250-mm diameter or larger.
4
The sole source of supply for the Turner Fluorometer known to the committee
at this time are Turner models 110, 111, 112 made by Sequoia-Turner of Mountain
View, CA.
5
If you are aware of alternative suppliers, please provide this information to
ASTM Headquarters. Your comments will receive careful consideration at a meeting
of the responsible technical committee,1 which you may attend.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
E 1135 97
the same size as the secondary filters (8.3) and the filters
chosen for any measurement should be mounted with the
secondary filters.
8.5 Place the primary filter in the right filter holder and the
secondary filters in the left filter holder.
8.6 Insert neutral density filters in secondary filter position
and set sensitivity control (under primary filter) to 1.
8.7 Turn on instrument and allow 15 min warm up before
use.
8.8 Place a prepared sample of the brightest material to be
measured in the sample holder.
8.9 Place holder in instrument door, close door, and note
reading. Open door and insert proper neutral density filters to
bring reading on scale, preferably in the 70 to 90 scale division
range.
8.10 Open door, remove sample holder, remove sample, and
replace with an untreated filter paper.
8.11 Place sample holder in door, close door, and set reading
to zero with blank control.
8.12 Remove blank paper and insert prepared samples for
measurement. Alternate samples of unknown and standard
material to minimize affect of any instrument drift which might
occur.
Dimensions
in.
A
B
C
D
E
F
G
H
J
K
L
M
N
P
Q
R
S
T
V
W
X
Y
Z
AA
BB
CC
DD
EE
FF
GG
HH
JJ
KK
4.5
2.186
1.125
0.875
0.563
0.50
0.813
1.375
1.938
0.188 radius (2)
2.25
2.00
1.00
1.375
2.50
3.813
0.438 diameter drill thru
0.625 diameter counterbore 0.25 deep
mm
114.3
55.52
28.575
22.225
14.30
12.70
20.65
34.925
49.225
4.775
57.15
50.80
25.40
34.925
63.50
96.85
11.125
15.875
6.35
6.35
3.175
1.60
28.575
6.35
12.70
12.70
40.489
34.925
20.244
15.875
3.175
0.25
0.125
0.063
1.125
0.25
0.50 drill thru & chamfer
0.50
1.594
1.375
0.797
0.625
0.125
(2) No. 6 flat washers
(2) 316 in. (4.76 mm) flat washers
(1) No. 6 (0.138) flat head machine screw 12 in. (12.7 mm) long &
hex nut
6
The sole source of supply known to the committee at this time is Kopp Glass
Inc., P.O. Box 8255, Pittsburgh, PA 15218.
7
The sole source of supply of the Kodak 2A, 86A, and CC40Y known to the
committee at this time is Eastman Kodak, Inc., Rochester, NY 14650.
8
The sole source of supply of the Coleman Model 12C known to the committee
at this time is Perkin Elmer of Norwalk, CT.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
E 1135 97
a 2.0 neutral density mounted in a Coleman filter frame, glass
filter facing right, into the secondary filter position (vertical to
left of the sample hole).
9.6 Turn on instrument and allow 15 to 30 min warm up.
9.7 Compare prepared papers under black light and choose
one of the brightest group to set the instrument.
9.8 Place chosen prepared paper in sample holder, lock into
place, and insert holder into sample port of fluorometer.
Sample window should face away from operator at approximately a 45 angle to the left.
9.9 Set Std control and all blank controls in the middle of
their adjustment ranges. (Do not force Std control or release
notch stop under it since this will shut instrument off.)
9.10 Move sensitivity control full right, depress shutter
button, and move sensitivity control gently left until meter
reads near top of scale.
9.11 Remove sample holder, replace fluorescent paper with
an untreated blank paper and reinsert in instrument.
9.12 Depress shutter button and rotate sample holder until
highest reading is obtained. If reading goes off scale, move
sensitivity control right until it is on scale.
9.13 With shutter button depressed, turn coarse blank control until meter reads approximately zero. Adjust to exactly
zero with fine blank control.
9.14 Remove blank paper and insert brightest treated paper.
9.15 Depress shutter control and rotate sample until highest
reading is obtained, then adjust Std control until meter reads
approximately 90.
9.16 If desired adjustment cannot be attained, adjust sensitivity control, then repeat 9.11-9.15 until proper adjustment is
obtained.
9.17 Measure papers, alternating standard and test samples
to minimize the effect of instrument drift, should it occur.
Dimensions
in.
A
B
C
D
E
F
G
H
J
K
L
M
N
P
Q
R
S
T
V
W
X
Y
Z
AA
BB
CC
DD
EE
FF
GG
HH
JJ
KK
LL
0.75 diameter
0.25
#21 (.159 in.) diameter drill 3 2.125
deep and 1032 thread
3 0.75 deep
0.75
1.125
0.125 Slot 3 1.5 long
4.313
0.25
2.688
1.25
0.313
0.625
0.047
1.00 diameter
0.75 diameter
mm
19.05
6.35
4.039
53.975
19.05
19.05
28.58
3.18
38.1
109.55
6.35
68.28
31.75
7.95
15.88
1.19
25.40
19.05
6.35
8.74
34.14
16.66
9.53
4.826
2.54
1.60
4.775
19.05
88.9
3.175
7.137
4.72
1.519
19.05
38.1
0.737
15.875
34.925
1.60
9
The sole source of supply of the Model S291 known to the committee at this
time is NDT I Taliana SAS of Viale Monza, Italy.
10
The sole source of supply of the OGR green and OB14 blue glass filter known
to the committee at this time is Chance Pilkington, London, Great Britain.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
E 1135 97
11. Calculation
11.1 Calculate the fluorescence of the test material as a
percentage of that of the standard material by the formula
X/S 3 100
(3)
where:
X = the average of the test material reading, and
S = the average of the standard material reading.
12. Precision and Bias
12.1 The results for the Turner Fluorometers and the Coleman 12C small duplicate tests should not be considered suspect
unless they differ by more than:
3.9 % repeatability (within the same laboratory)
14.0 % reproducibility (between different laboratories)
13. Keywords
13.1 brightness of dye penetrants; dye penetrants; fluorescent penetrants
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