IPC-TM-650 EN 2022 试验方法.pdf - 第16页

Recommendations If applicable and if possible, this section is used to recom- mend needed corrections or to indicate discrepancies in the design of the specimen, which was tested. Care should be taken to limit the recomm…

concise and detailed test report is essential to convey the

necessary elements of the test. The most important consider-

ation in writing the test report is a realization of the minimum

requirements of content, regardless of what form is required.

It must be borne in mind that the purpose of the test report is

to tell someone the following facts:

a. what was tested

b. what information was sought about this item under test

c. what means and procedures were used to obtain the infor-

mation

d. what data was obtained

e. what conclusions were reached from the information

obtained

The intended distribution of the report may be a factor in the

determination of not only the extent but also the manner of

presentation. For reports intended only for internal use, a

description of the facilities, instruments, or calibration proce-

dures used may be made by reference to laboratory equip-

ment identification numbers or to procedure numbers. On the

other hand, for reports intended for wide external distribution,

complete descriptions are necessary so the test can be dupli-

cated, if desired.

The following paragraphs contain a description of the ele-

ments which, depending on the intended audience and type

of testing requested, may be necessary in a test report:

Subject

The

subject of the report is a statement of what the report is

about. Example: High Temperature Tests of Flexible Cables.

Results

This

section of the report includes the results of the testing,

the analysis of the results (including any explanations of dis-

crepancies or errors) and the logical development of the con-

clusions.

It is of primary importance that a reader can look only at the

Results section of a report and be able to see what was found

and what was concluded.

Reference

This

section should list the applicable test method and/or

specification.

Test

Specimen

The test specimen is thoroughly identified in the report name,

part number, manufacturer and/or vendor. Operational char-

acteristics and function or design features are briefly

explained. Any remarks as to material, special dimensions

etc., that may be pertinent to the test or test results are

included.

Test

Equipment

The facility used for imposing the environment, including con-

trols and location of instrumentation, is described in this sec-

tion of the report. The manufacturer’s name, model and serial

number are stated, as well as any modifications incorporated

in the facility.

Every measuring instrument employed in the test is identified

in the report and its expected or determined (from calibration)

accuracy and limits of operation are stated. The date of last

calibration and the next calibration due date are listed. Spe-

cific characteristics, which are pertinent to the test are indi-

cated.

Test

Setup

The combination of test specimen, test facility and instrumen-

tation must be thoroughly described in this section of the

report. Sketches or drawing of the mounting, loading or actu-

ating fixtures are included and discussed in the description.

Careful consideration must be given to photographs of the

test setup in order that maximum detail can be shown. Sche-

matic drawings and sketches showing critical dimensions and

locations of instruments may be used to supplement photo-

graphs, since scaling of distances as obtained from photo-

graphs may not be accurate.

Test

Procedure

The

step-by-step procedure of obtaining the data from the

employment of the setup and instrumentation in testing is

described sequentially and in detail in this section. The test log

used in performing the test, including such modifications as

were necessitated during the test, provides the information for

writing the procedure.

2215

Sanders Road

Northbrook, IL 60062-6135

IPC-TM-650

TEST METHODS MANUAL

Number

1.5

Subject

Reporting,

Format

Date

01/03

Revision

Originating Task Group

N/A

Material

in this Test Methods Manual was voluntarily established by Technical Committees of IPC. This material is advisory only

and its use or adaptation is entirely voluntary. IPC disclaims all liability of any kind as to the use, application, or adaptation of this

material. Users are also wholly responsible for protecting themselves against all claims or liabilities for patent infringement.

Equipment referenced is for the convenience of the user and does not imply endorsement by IPC.

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Recommendations

applicable and if possible, this section is used to recom-

mend needed corrections or to indicate discrepancies in the

design of the specimen, which was tested. Care should be

taken to limit the recommendations to those things indicated

by the test, and not go into design problems, which are the

responsibility of the designer.

IPC-TM-650

Number

1.5

Subject

Reporting,

Format

Date

01/03

Revision

age2of2

The

following guidelines should be used for numerical report-

ing:

1. Follow the IPC policy for the use of metric and English

units.

In an effort to prepare the industry for a full change to

complete metric measurements in IPC standards and

specifications, the Technical Activities Executive Commit-

tee (TAEC) voted on a new way for both to be included.

Through this new metric conversion policy, IPC docu-

ments will have hard metric numbers and parenthetical

soft imperial numbers with appropriate units.

The hard metric numbers will represent accuracy of the

numerical values as decided by the working committee/

task group according to their respective contexts.

For

example:

The

working committee/task group will decide whether a

hard metric number should be represented as:

1.3 mm (any value within the range of 1.25 mm to 1.34

mm is acceptable), or

1.30 mm (any value within the range of 1.295 mm to

1.304 mm is acceptable).

The soft imperial numbers will have one significant digit

more than the metric numbers to capture the accuracy

represented by the metric numbers.

For

example:

3m(one

significant digit) converts to 118.1102 in, which

will be documented as 3 m [120 in] (two significant dig-

its because the zero is a placeholder).

3.0 m (two significant digits) converts to 118.1102 in,

which will be documented as 3.0 m [118 in] (three sig-

nificant digits).

9.17 m (three significant digits) converts to 30.0853 ft,

which will be documented as 9.17 m [30.09 ft] (four sig-

nificant digits because all zeros embedded between non-

zero digits are significant).

2mm(one significant digit) converts to 0.07874016 in,

which will be documented as 2 mm [0.079 in] (two sig-

nificant digits because the zeros are placeholders used to

locate the decimal point).

66 µm (two significant digits) converts to 0.002598425 in,

which will be documented as 66 µm [2.60 mil] (three

significant digits because the non-truncated zero is not a

placeholder).

725 µm (three significant digits) converts to 0.02854331

in, which will be documented as 725 µm [28.54 mil] or

[0.02854 in] (appropriate units are determined by the

context of numerical values and both have four significant

digits).

3.8X10

-6

converts to 1.496063 X 10

-4

in,

which will

be documented as 3.8X10

-6

m [1.50 X 10

-4

in] (if sci-

entific numerical format is appropriate).

2. Spell out numbers one through ten, except in use with

measurement and time.

3. Spell out any numbers at the beginning of a sentence.

4. When reporting numbers less than a whole number,

place a zero to the left of the decimal point.

5. Report average results to the same amount of significant

figures as the numbers being averaged.

6. When readings reach maximum of test equipment or

maximum of practical values, precede the number with

‘‘greater than’’ or ‘‘>’’ and explain the reason for not

going to the limit.

7. Always report results in the same unit of measurement as

that of the requirement.

8. In reporting ranges use the preposition ‘‘to,’’ not a

hyphen as: 3 cm to 9 cm.

9. Report portions of a unit of measure in the singular.

10. Mark a failed result in such a way as it will stand out to

the reader. Later state what this marking signifies.

11. When tabulating, use clearly defined headings.

12. Clarify when more than one set of numbers is in a tabu-

lation of statement.

2215

Sanders Road

Northbrook, IL 60062-6135

IPC-TM-650

TEST METHODS MANUAL

Number

1.6

Subject

Numerical

Reporting

Date

01/03

Revision

Originating Task Group

N/A

Material

in this Test Methods Manual was voluntarily established by Technical Committees of IPC. This material is advisory only

and its use or adaptation is entirely voluntary. IPC disclaims all liability of any kind as to the use, application, or adaptation of this

material. Users are also wholly responsible for protecting themselves against all claims or liabilities for patent infringement.

Equipment referenced is for the convenience of the user and does not imply endorsement by IPC.

age1of1

ASSOCIATION CONNECTING

ELECTRONICS INDUSTRIES