IPC-TM-650 EN 2022 试验方法.pdf - 第15页

A 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, regardl…

The

recognition of the effect of the test procedure on the test

results must be carried into the examination of the data

obtained from the test. The meaning of the data must be ana-

lyzed against the background of the procedure for obtaining it.

In addition, some general considerations apply in examining

the data.

The extent to which usable data can be selected from the test

results is influenced by how well the log of the test has been

kept. The original data sheet should be marked at all ques-

tionable data points. If the reason for questioning a data point

can be determined, it should be noted in the test log. Causes

for questioning a data point can include changing the opera-

tor or observer, exceeding the range on an indicator, replac-

ing test leads that shook loose, or any other incident consti-

tuting a deviation from the planned test procedure.

Of equal importance to the test results and much more diffi-

cult to detect are questionable data points unaccompanied by

a notation in the test log. Additionally, it is often useful to per-

form all calculations soon after conducting the test. When

results are suspect, it is almost always easier to perform a root

cause analysis during or immediately after the test. The prob-

lem is to distinguish between a divergent point caused by the

specimen being tested and one caused by improper use of

the test method. Only by an intensive re-examination of the

test set up can this problem be answered. Some of the poten-

tial causes of divergence are:

• Instruments subjected to an environment for which they are

not calibrated

• Thermocouple opening

• Instruments operated without sufficient warm up

• Incorrect sequencing of the test circuit

• Hook ups to the wrong circuit

• Operator error

2215

Sanders Road

Northbrook, IL 60062-6135

IPC-TM-650

TEST METHODS MANUAL

Number

1.4

Subject

Reporting,

General

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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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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ASSOCIATION CONNECTING

ELECTRONICS INDUSTRIES

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