QC/T 727-2017 English PDF (QCT727-2017)

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QC/T 727-2017: Instrument for automobile and motorcycle
QC/T 727-2017
QC
AUTOMOBILE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
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
Attachment.
Number, name and date of implementation of 22 automotive industry
standards
No. Standard number Standard name Number of standard replaced
Date of
implementation
301 QC/T 727-2017 Instrument for automobile and motorcycle QC/T 727-2007 2017-10-01
302 QC/T 803-2017 Oxygen sensor for automobile QC/T 803.1-2008 2017-10-01
303 QC/T 1072-2017 Gear position sensor for automobiles 2017-10-01
304 QC/T 1073.1-2017 Accelerometers for automobiles - Part 1. Linear accelerometers 2017-10-01
305 QC/T 1074-2017 Technical specifications for automotive parts remanufacturing products 2017-10-01
306 QC/T 1075-2017
Technical conditions for metal
honeycomb carrier of exhaust catalytic
converter
2017-10-01
307 QC/T 777-2017
Technical conditions for
electromagnetic fan clutch of
automobile
QC/T 777-2007 2017-10-01
308 QC/T 1076-2017
Performance requirements and test
methods for continuously variable
transmission (CVT)
2017-10-01
309 QC/T 1077-2017
Terminology and definitions for
classification of automatic control
transmission for automobile
2017-10-01
310 QC/T 1078-2017 Advertising vehicle 2017-10-01
311 QC/T 1079-2017 Suction and delivery vehicle 2017-10-01
312 QC/T 1080-2017 Mobile loudspeaker for popularization of science 2017-10-01
313 QC/T 1081-2017 Electric power steering device for automobile 2017-10-01
314 QC/T 1082-2017 Motor for electric power steering device of automobile 2017-10-01
315 QC/T 1083-2017 Controller for electric power steering device of automobile 2017-10-01
316 QC/T 1084-2017 Sensor for electric power steering device of automobile 2017-10-01
317 QC/T 1085-2017 X-ray testing for light-alloy wheel of motorcycle 2017-10-01
318 QC/T 1086-2017 Technical conditions for range extenders for electric vehicles 2017-10-01
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;
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 and expression and
judgement of limiting values
GB/T 19951 Road vehicles - Test methods for electrical disturbances from
electrostatic discharge
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.
4.3.2 Glass or other transparent materials shall not have scratches or
refractions that affect accurate readings.
4.3.3 The division lines, symbols, numbers and other markings on the dial shall
be clear and complete.
4.3.4 The exposed portion of the meter indicator shall not have glare.
4.3.5 When the electrical instrument indicator is not working, its pointer shall be
below the initial division, it may also touch the starting division line. When the
mechanical instrument is not working, its pointer shall stop at the backstop
position, it shall not leave the starting division line.
4.3.6 The speedometer is used to record the number on the digital wheel of the
driving mileage, such number shall be completely arranged in the mileage count
window. For the mechanical mileage counter, the color indicating the numbers
of integer mileage and the decimal mileage shall be clearly distinguishable. The
integer part and the decimal part of the digital-display mileage counter shall be
clearly distinguishable. The cumulative mileage at the time of exit-factory shall
not exceed 10 km.
4.4 Indication status
When the signal changes smoothly, the pointer movement shall be smooth and
there shall be no jamming. For the digital-display instrument, when the signal
changes smoothly, its display value shall ...