QC/T 727-2017 PDF English
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QC/T 727-2017: Instrument for automobile and motorcycle---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/QCT727-2017
QC
AUTOMOBILE INDUSTRY STANDARD
ICS 43.040.30
T 39
Replacing QC/T 727-2007
Instrument for automobile and motorcycle
Issued on. APRIL 12, 2017
Implemented on. OCTOBER 01, 2017
Issued by. Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword... 7
1 Scope... 9
2 Normative references... 9
3 Classification of products... 10
4 Requirements... 10
5 Test methods... 21
6 Inspection rules... 30
7 Marking, packaging, storage and preservation... 32
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009
“Directives for standardization - Part 1.Structure and drafting of standards”.
This standard is the revision of QC/T 727-2007 “Instruments for automobiles
and motorcycles”.
As compared with QC/T 727-2007, the main changes of this standard are as
follows.
- MODIFY the content of the application scope of standard, ADD the clock
products;
- MODIFY the content of the normative references;
- IMPROVE the upper limit of the temperature range;
- ADD the content of the clock unit;
- ADD the content of the basic error of the clock;
- ADD the requirements that the response time of the speedometer and
tachometer is to be determined through negotiation between the supplier
and the purchaser;
- CHANGE the name of the temperature influence test into the temperature
resistance test;
- CHANGE the technical conditions and test methods for vibration resistance,
to refer to the relevant contents of GB/T 28046.3;
- CHANGE the voltage fluctuation range in the operating voltage
performance, to make it consistent with the relevant content in GB/T
28046.2;
- ADD the contents of the antistatic discharge performance and conducted-
interference resistance;
- DELETE the contents of voltage interference test;
- CHANGE the content of radiated-interference resistance;
- ADD the contents of the test methods of the antistatic discharge and the
conducted-interference resistance;
- ADD the content of the clock’s basic error test;
- CHANGE the content of the test method of radiated-interference resistance;
- ADD the weather-resistance requirements;
- DELETE the requirements that the products which are manufactured in
batches or mass produced shall be subjected to at least one type inspection
every two years;
- MAKE partial adjustment of the order of clauses of the technical
requirements and the test method, to make them more compact and
corresponding.
This standard does not involve patents.
This standard was proposed by and shall be under the jurisdiction of the
National Automotive Standardization Technical Committee (SAC/TC 114).
Responsible drafting organization of this standard. Dongfeng Automotive
Electronics Co., Ltd.
Participated drafting organizations of this standard. Jiangsu Xintongda
Technology Co., Ltd., Huangshan Jinma Co., Ltd., Anhui Jinhaida Automotive
Electronics Co., Ltd.
The main drafters of this standard. Hou Fei, Chen Jun, Sun Yongfa, Chen
Jianhai, Song Wenqiong, Cheng Yihong, Liu Aihua.
This standard replaces the standard previously issued as follows.
- QC/T 727-2004;
- QC/T 727-2007.
Instrument for automobile and motorcycle
1 Scope
This standard specifies the classification, requirements, test methods,
inspection rules, marking, packaging, storage and preservation of instruments
for automobiles and motorcycles (hereinafter referred to as “instruments”).
This standard applies to speed odometers, tachometers, fuel gauges,
thermometers, pressure gauges, voltmeters, ammeters and clocks (hereinafter
referred to as “instruments”) for automobile and motorcycle. Other instruments
for motor vehicles may also make reference to this standard.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
GB 15082 Speed meters for motor vehicle
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 2423.17 Environmental testing for electric and electronic products -
Part 2.Test method - Test Ka. Salt mist
GB/T 2423.22 Environmental testing - Part 2.Tests methods - Test N.
Change of temperature
GB/T 2423.34 Environmental testing - Part 2.Test methods - Test Z/AD.
Composite temperature/humidity cyclic test
GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1.
Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot
inspection
GB/T 8170 Rules of rounding off for numerical values & expression and
judgement of limiting values
GB/T 19951 Road vehicles - Test methods for electrical disturbances from
electrostatic discharge
3 Classification of products
In accordance with the function, it is divided into speedometer, tachometer, fuel
gauge, thermometer, pressure gauge, voltmeter, ammeter, clock, etc.
4 Requirements
4.1 General provisions
4.1.1 Product documentation.
4.1.2 Normal working environment conditions.
Temperature. 18 °C ~ 28 °C;
Relative humidity. 45% ~ 75%;
Air pressure. 86 kPa ~ 106 kPa.
4.2 Units and divisions
4.2.1 The speed unit of the speedometer is generally expressed in kilometers
per hour (km/h). The mileage unit is expressed in kilometers (km). The minimum
division of speed shall be not more than 10 km/h. The division of speed shall
comply with the requirements of GB 15082.
4.2.6 The unit of the thermometer is generally expressed in degrees Celsius
(°C). In principle, it shall not be less than two divisions. lower limit value -
intermediate value - upper limit value. It is also possible to use C to indicate the
lower limit value of temperature, H to indicate the upper limit value of
temperature.
4.2.7 The unit of the pressure gauge is generally expressed in megapascals
(MPa). In principle, it is not less than two divisions. the lower limit value - the
intermediate value - the upper limit value, wherein the intermediate pressure
value is about one-half of the upper limit value of pressure.
4.2.8 The unit of clock is generally expressed in hours (h), minutes (min) and
seconds (s).
4.3 Appearance
4.3.1 The protective layer shall be uniform, free from obvious bubbles, spots,
rust, falling off, or other defects.
4.4 Indication status
When the signal changes smoothly, the pointer movement shall be smooth and
there shall be no jamming.
4.5 Basic error
4.5.1 Under the environmental conditions as specified in 4.1.2, the basic error
of the pressure gauge is.
4.6 Pointer’s response time (pressure gauge, fuel gauge, thermometer,
voltmeter, speedometer, tachometer)
4.6.1 When the pressure gauge is abruptly changed from the upper limit value
to the lower limit value, the pointer of the pressure gauge must return to less
than 10% of the upper limit value of pressure within 10 s (or 2 min for pressure
gauge of the bimetal structure).
4.7 Damping of ammeter’s pointer
When the ammeter’s pointer moves to the upper limit of the scale, if cutting off
the current, the pointer must stop swinging within 3 s.
4.8 Overload (pressure gauge, ammeter)
4.8.1 Mechanical pressure gauges shall be capable of withstanding an overload
test of 1.2 times the upper limit pressure of the scale.
4.9 Torque of speedometer of magnetic-induction type
The torque for moving the mechanism of the speedometer of the magnetic-
induction type shall not exceed 0.02 N • m.
4.10 Withstanding voltage of insulation
The electrical instrument shall be capable of withstanding a test at the voltage
of 50 Hz and an actual sine wave of 550 V for 1 min. The insulation shall not be
broken down.
4.12 Resistance to temperature
4.13 Resistance to cyclic temperature and humidity change
The instrument shall be subjected to 10 cycles of temperature/humidity
combination test at -10 °C ~ 65 °C in accordance with the provisions of GB/T
2423.34.Each cycle is 24 h, the changes in temperature and humidity in each
cycle are as shown in Figure 1.The test is performed in a non-working state.
After the test, the instrument shall still comply with the provisions of 4.4 and 4.5.
4.14 Resistance to vibration
The instrument is subjected to a random vibration test in accordance with the
requirements as specified in 4.1.2.8 of GB/T 28046.3.During the test and after
the test, each part shall not be loose or damaged. During the test, it shall comply
with the provisions of 4.4.After the test, it shall comply with the provisions of
4.4 and 4.5.
4.17 Over-voltage of power supply
Electronic and electrical instruments shall be able to withstand a certain value
of the overvoltage test of power supply without damage. After the overvoltage
test of power supply in accordance with the test parameters as given in Table
6, there shall be free of abnormal changes in all parts, and they shall comply
with the provisions of 4.4 and 4.5.
4.21 Durability
5 Test methods
5.1 Test conditions
5.1.1 The indicated value of the instrument shall be checked under the
environmental conditions as specified in 4.1.2.
5.1.2 The installation position of the instrument on the test bench shall be the
same as the actual installation position in the vehicle used.
5.1.3 The signal sources of the instrument are tested in matching with that of
the analog sensor.
5.1.9 The accuracy of the standard thermometer shall not be less than ±1 °C.
5.1.10 The accuracy of the standard clock or clock meter shall not be less than
± 0.5 s/24 h.
5.2 Visual inspection
For visual inspection, it shall provide a uniform illumination of approximately
300 Lx, at the visual distance of 500 mm, use the visual inspection method to
perform inspection.
5.3 Test of basic error and indication status
5.3.1 Test of basic error of pressure gauge.
During the test, in the order of decreasing first and then rising, read out the
indicated value of the pressure gauge corresponding to the signal source when
the nominal value is output at the intermediate pressure value and the upper
limit pressure value of the scale.
5.3.4 Test of basic error of tachometer.
The test is performed in a comparison with the calibration console of tachometer,
in the order of rising first and then descending. The test is carried out in
comparison with the calibration console of tachometer or the standard
tachometer, in the order of rising first and then descending, to assess three
points about 20%, 60% and 90% of the upper limit.
5.3.8 Test of basic error of block.
The test is performed by the method of comparison with a standard clock for 72
h.
5.3.9 The clause 4.4 shall be checked in this test.
5.4 Test of pointer’s response time
5.4.1 Make the pressure gauge stably indicate the upper limit of pressure of the
scale, then abruptly change the signal source to the 0 position to output the
nominal value. When the pointer points to 10% of the upper limit value of
pressure, record the response time of the pointer.
5.5 Damping test of ammeter’s pointer
Record the time elapsed when the ammeter’s pointer returns from the division
line of the upper limit of the scale after cut-off of power to motionless at 0
position. It shall take the average of the time which is measured in three tests.
5.6 Overload test
5.6.1 For the mechanical pressure gauge, it shall apply the pressure 1.2 times
the upper limit of pressure on the scale for 1 min. After the test, the pressure
gauge shall be placed at the environmental conditions as specified in 4.1.2 for
not less than 4 h.
6 Inspection rules
6.1 Qualification documents and markings
The instrument can be exit-factory after passing the inspection, meanwhile it
shall be accompanied by the instrument quality certificate or marking.
6.2 Type of inspection
The inspection of the instrument is divided into exit-factory inspection,
acceptance inspection and type inspection.
6.3 Exit-factory inspection
The exit-factory inspection items include the appearance, installation
dimensions, markings, and basic errors and indication status of the instrument.
6.5 Type inspection
6.5.1 Several cases of type inspection.
In any of the following cases, the manufacturer shall carry out type inspection.
6.5.2 Sampling and grouping.
6.5.2.1 Quantity of samples.
The products for type inspection shall be taken from the same batch of products
that have passed the exit-factory inspection, the quantity shall not be less than
12.
6.5.3 Qualification judgment.
6.5.3.1 The determination of the inspection results of each indicator of the
instrument shall be carried out in accordance with the requirements of this
standard or the technical requirements of the instrument’s product pattern.
6.5.3.2 The processing of test data shall comply with the provisions of GB/T
8170.
6.5.3.3 The type inspection of the instrument shall all meet the requirements. If
there is a nonconformance, it may double the samples (that is, take another 6
samples) to carry out re-inspection for this disqualified item. If there is still
nonconformance, this batch of products is judged as disqualified.
6.5.3.4 When the durability test fails, it is not allowed to double the sample for
re-inspection, it shall be directly judged as disqualified.
7 Marking, packaging, storage and preservation
7.1 Marking
7.1.1 Product marking.
For each product, it should mark the following items at the obvious part.
7.1.2 Packaging mark
The basic contents of the packaging mark shall include.
7.2 Packaging
7.2.1 Product packaging shall consider the following.
7.2.2 Packaging box.
7.2.2.1 The packing box shall be secure, the product shall not move in the box,
to avoid damage during transportation.
7.2.2.2 The technical documentation accompanying the product in the
packaging box shall include.
7.3 Storage and preservation
The storage and preservation of the product shall comply with the relevant
provisions of QC/T 238.The shelf life of the product is usually 2 years (from the
date of warehousing-in of the manufacturer). At the end of the shelf life of 2
years, the product shall still comply with the provisions of this standard.
QC/T 727-2017
QC
AUTOMOBILE INDUSTRY STANDARD
ICS 43.040.30
T 39
Replacing QC/T 727-2007
Instrument for automobile and motorcycle
Issued on. APRIL 12, 2017
Implemented on. OCTOBER 01, 2017
Issued by. Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword... 7
1 Scope... 9
2 Normative references... 9
3 Classification of products... 10
4 Requirements... 10
5 Test methods... 21
6 Inspection rules... 30
7 Marking, packaging, storage and preservation... 32
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009
“Directives for standardization - Part 1.Structure and drafting of standards”.
This standard is the revision of QC/T 727-2007 “Instruments for automobiles
and motorcycles”.
As compared with QC/T 727-2007, the main changes of this standard are as
follows.
- MODIFY the content of the application scope of standard, ADD the clock
products;
- MODIFY the content of the normative references;
- IMPROVE the upper limit of the temperature range;
- ADD the content of the clock unit;
- ADD the content of the basic error of the clock;
- ADD the requirements that the response time of the speedometer and
tachometer is to be determined through negotiation between the supplier
and the purchaser;
- CHANGE the name of the temperature influence test into the temperature
resistance test;
- CHANGE the technical conditions and test methods for vibration resistance,
to refer to the relevant contents of GB/T 28046.3;
- CHANGE the voltage fluctuation range in the operating voltage
performance, to make it consistent with the relevant content in GB/T
28046.2;
- ADD the contents of the antistatic discharge performance and conducted-
interference resistance;
- DELETE the contents of voltage interference test;
- CHANGE the content of radiated-interference resistance;
- ADD the contents of the test methods of the antistatic discharge and the
conducted-interference resistance;
- ADD the content of the clock’s basic error test;
- CHANGE the content of the test method of radiated-interference resistance;
- ADD the weather-resistance requirements;
- DELETE the requirements that the products which are manufactured in
batches or mass produced shall be subjected to at least one type inspection
every two years;
- MAKE partial adjustment of the order of clauses of the technical
requirements and the test method, to make them more compact and
corresponding.
This standard does not involve patents.
This standard was proposed by and shall be under the jurisdiction of the
National Automotive Standardization Technical Committee (SAC/TC 114).
Responsible drafting organization of this standard. Dongfeng Automotive
Electronics Co., Ltd.
Participated drafting organizations of this standard. Jiangsu Xintongda
Technology Co., Ltd., Huangshan Jinma Co., Ltd., Anhui Jinhaida Automotive
Electronics Co., Ltd.
The main drafters of this standard. Hou Fei, Chen Jun, Sun Yongfa, Chen
Jianhai, Song Wenqiong, Cheng Yihong, Liu Aihua.
This standard replaces the standard previously issued as follows.
- QC/T 727-2004;
- QC/T 727-2007.
Instrument for automobile and motorcycle
1 Scope
This standard specifies the classification, requirements, test methods,
inspection rules, marking, packaging, storage and preservation of instruments
for automobiles and motorcycles (hereinafter referred to as “instruments”).
This standard applies to speed odometers, tachometers, fuel gauges,
thermometers, pressure gauges, voltmeters, ammeters and clocks (hereinafter
referred to as “instruments”) for automobile and motorcycle. Other instruments
for motor vehicles may also make reference to this standard.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
GB 15082 Speed meters for motor vehicle
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 2423.17 Environmental testing for electric and electronic products -
Part 2.Test method - Test Ka. Salt mist
GB/T 2423.22 Environmental testing - Part 2.Tests methods - Test N.
Change of temperature
GB/T 2423.34 Environmental testing - Part 2.Test methods - Test Z/AD.
Composite temperature/humidity cyclic test
GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1.
Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot
inspection
GB/T 8170 Rules of rounding off for numerical values & expression and
judgement of limiting values
GB/T 19951 Road vehicles - Test methods for electrical disturbances from
electrostatic discharge
3 Classification of products
In accordance with the function, it is divided into speedometer, tachometer, fuel
gauge, thermometer, pressure gauge, voltmeter, ammeter, clock, etc.
4 Requirements
4.1 General provisions
4.1.1 Product documentation.
4.1.2 Normal working environment conditions.
Temperature. 18 °C ~ 28 °C;
Relative humidity. 45% ~ 75%;
Air pressure. 86 kPa ~ 106 kPa.
4.2 Units and divisions
4.2.1 The speed unit of the speedometer is generally expressed in kilometers
per hour (km/h). The mileage unit is expressed in kilometers (km). The minimum
division of speed shall be not more than 10 km/h. The division of speed shall
comply with the requirements of GB 15082.
4.2.6 The unit of the thermometer is generally expressed in degrees Celsius
(°C). In principle, it shall not be less than two divisions. lower limit value -
intermediate value - upper limit value. It is also possible to use C to indicate the
lower limit value of temperature, H to indicate the upper limit value of
temperature.
4.2.7 The unit of the pressure gauge is generally expressed in megapascals
(MPa). In principle, it is not less than two divisions. the lower limit value - the
intermediate value - the upper limit value, wherein the intermediate pressure
value is about one-half of the upper limit value of pressure.
4.2.8 The unit of clock is generally expressed in hours (h), minutes (min) and
seconds (s).
4.3 Appearance
4.3.1 The protective layer shall be uniform, free from obvious bubbles, spots,
rust, falling off, or other defects.
4.4 Indication status
When the signal changes smoothly, the pointer movement shall be smooth and
there shall be no jamming.
4.5 Basic error
4.5.1 Under the environmental conditions as specified in 4.1.2, the basic error
of the pressure gauge is.
4.6 Pointer’s response time (pressure gauge, fuel gauge, thermometer,
voltmeter, speedometer, tachometer)
4.6.1 When the pressure gauge is abruptly changed from the upper limit value
to the lower limit value, the pointer of the pressure gauge must return to less
than 10% of the upper limit value of pressure within 10 s (or 2 min for pressure
gauge of the bimetal structure).
4.7 Damping of ammeter’s pointer
When the ammeter’s pointer moves to the upper limit of the scale, if cutting off
the current, the pointer must stop swinging within 3 s.
4.8 Overload (pressure gauge, ammeter)
4.8.1 Mechanical pressure gauges shall be capable of withstanding an overload
test of 1.2 times the upper limit pressure of the scale.
4.9 Torque of speedometer of magnetic-induction type
The torque for moving the mechanism of the speedometer of the magnetic-
induction type shall not exceed 0.02 N • m.
4.10 Withstanding voltage of insulation
The electrical instrument shall be capable of withstanding a test at the voltage
of 50 Hz and an actual sine wave of 550 V for 1 min. The insulation shall not be
broken down.
4.12 Resistance to temperature
4.13 Resistance to cyclic temperature and humidity change
The instrument shall be subjected to 10 cycles of temperature/humidity
combination test at -10 °C ~ 65 °C in accordance with the provisions of GB/T
2423.34.Each cycle is 24 h, the changes in temperature and humidity in each
cycle are as shown in Figure 1.The test is performed in a non-working state.
After the test, the instrument shall still comply with the provisions of 4.4 and 4.5.
4.14 Resistance to vibration
The instrument is subjected to a random vibration test in accordance with the
requirements as specified in 4.1.2.8 of GB/T 28046.3.During the test and after
the test, each part shall not be loose or damaged. During the test, it shall comply
with the provisions of 4.4.After the test, it shall comply with the provisions of
4.4 and 4.5.
4.17 Over-voltage of power supply
Electronic and electrical instruments shall be able to withstand a certain value
of the overvoltage test of power supply without damage. After the overvoltage
test of power supply in accordance with the test parameters as given in Table
6, there shall be free of abnormal changes in all parts, and they shall comply
with the provisions of 4.4 and 4.5.
4.21 Durability
5 Test methods
5.1 Test conditions
5.1.1 The indicated value of the instrument shall be checked under the
environmental conditions as specified in 4.1.2.
5.1.2 The installation position of the instrument on the test bench shall be the
same as the actual installation position in the vehicle used.
5.1.3 The signal sources of the instrument are tested in matching with that of
the analog sensor.
5.1.9 The accuracy of the standard thermometer shall not be less than ±1 °C.
5.1.10 The accuracy of the standard clock or clock meter shall not be less than
± 0.5 s/24 h.
5.2 Visual inspection
For visual inspection, it shall provide a uniform illumination of approximately
300 Lx, at the visual distance of 500 mm, use the visual inspection method to
perform inspection.
5.3 Test of basic error and indication status
5.3.1 Test of basic error of pressure gauge.
During the test, in the order of decreasing first and then rising, read out the
indicated value of the pressure gauge corresponding to the signal source when
the nominal value is output at the intermediate pressure value and the upper
limit pressure value of the scale.
5.3.4 Test of basic error of tachometer.
The test is performed in a comparison with the calibration console of tachometer,
in the order of rising first and then descending. The test is carried out in
comparison with the calibration console of tachometer or the standard
tachometer, in the order of rising first and then descending, to assess three
points about 20%, 60% and 90% of the upper limit.
5.3.8 Test of basic error of block.
The test is performed by the method of comparison with a standard clock for 72
h.
5.3.9 The clause 4.4 shall be checked in this test.
5.4 Test of pointer’s response time
5.4.1 Make the pressure gauge stably indicate the upper limit of pressure of the
scale, then abruptly change the signal source to the 0 position to output the
nominal value. When the pointer points to 10% of the upper limit value of
pressure, record the response time of the pointer.
5.5 Damping test of ammeter’s pointer
Record the time elapsed when the ammeter’s pointer returns from the division
line of the upper limit of the scale after cut-off of power to motionless at 0
position. It shall take the average of the time which is measured in three tests.
5.6 Overload test
5.6.1 For the mechanical pressure gauge, it shall apply the pressure 1.2 times
the upper limit of pressure on the scale for 1 min. After the test, the pressure
gauge shall be placed at the environmental conditions as specified in 4.1.2 for
not less than 4 h.
6 Inspection rules
6.1 Qualification documents and markings
The instrument can be exit-factory after passing the inspection, meanwhile it
shall be accompanied by the instrument quality certificate or marking.
6.2 Type of inspection
The inspection of the instrument is divided into exit-factory inspection,
acceptance inspection and type inspection.
6.3 Exit-factory inspection
The exit-factory inspection items include the appearance, installation
dimensions, markings, and basic errors and indication status of the instrument.
6.5 Type inspection
6.5.1 Several cases of type inspection.
In any of the following cases, the manufacturer shall carry out type inspection.
6.5.2 Sampling and grouping.
6.5.2.1 Quantity of samples.
The products for type inspection shall be taken from the same batch of products
that have passed the exit-factory inspection, the quantity shall not be less than
12.
6.5.3 Qualification judgment.
6.5.3.1 The determination of the inspection results of each indicator of the
instrument shall be carried out in accordance with the requirements of this
standard or the technical requirements of the instrument’s product pattern.
6.5.3.2 The processing of test data shall comply with the provisions of GB/T
8170.
6.5.3.3 The type inspection of the instrument shall all meet the requirements. If
there is a nonconformance, it may double the samples (that is, take another 6
samples) to carry out re-inspection for this disqualified item. If there is still
nonconformance, this batch of products is judged as disqualified.
6.5.3.4 When the durability test fails, it is not allowed to double the sample for
re-inspection, it shall be directly judged as disqualified.
7 Marking, packaging, storage and preservation
7.1 Marking
7.1.1 Product marking.
For each product, it should mark the following items at the obvious part.
7.1.2 Packaging mark
The basic contents of the packaging mark shall include.
7.2 Packaging
7.2.1 Product packaging shall consider the following.
7.2.2 Packaging box.
7.2.2.1 The packing box shall be secure, the product shall not move in the box,
to avoid damage during transportation.
7.2.2.2 The technical documentation accompanying the product in the
packaging box shall include.
7.3 Storage and preservation
The storage and preservation of the product shall comply with the relevant
provisions of QC/T 238.The shelf life of the product is usually 2 years (from the
date of warehousing-in of the manufacturer). At the end of the shelf life of 2
years, the product shall still comply with the provisions of this standard.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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