IPC-TM-650 EN 2022 试验方法.pdf - 第14页
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 pr…
Three
main elements must be considered in planning how to
obtain test data at room ambient conditions. These are:
1. The set-up for supporting and operating the test equip-
ment.
2. The instrumentation for measuring the data from the tests.
3. The instrumentation for measuring and recording room
conditions at the time of the test.
This last factor is important when comparing test data
obtained at different times or facilities. In most cases, this step
consists of simply recording the barometric pressure, relative
humidity and temperature at the time of the test. If other con-
ditions are found to have a significant impact on the test data
these conditions should be recorded as well.
Unless otherwise specified in the applicable test method, indi-
vidual standard or specification, all laboratory ambient tests
shall be made under the following conditions:
1. Temperature: 15 °C to 35 °C [59 °F to 95 °F]
2. Relative Humidity: 35 % to 75 %
Whenever these conditions must be closely controlled to
obtain reproducible results or for referee purposes, tests shall
be conducted under the following conditions:
1. Temperature: 22 °C±3°C[72°F±5°F]
2. Relative Humidity: 50%±10%
2215
Sanders Road
Northbrook, IL 60062-6135
IPC-TM-650
TEST METHODS MANUAL
Number
1.3
Subject
Ambient
Conditions
Date
01/03
Revision
A
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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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
A
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.
P
age1of1
ASSOCIATION CONNECTING
ELECTRONICS INDUSTRIES
®
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, 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
A
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.
P
age1of2
ASSOCIATION CONNECTING
ELECTRONICS INDUSTRIES
®