GB/T 14818-1993 General technical requirements for wire-wound disc type DC servo motors
Some standard content:
National Standard of the People's Republic of China
Wire-wound disc DC servo motors
General specificatlon for
DC servomotors with wound disc armatureSubject content and scope of application
GB/T14818-93
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of wound disc DC servo motors.
This standard is applicable to wound disc DC servo motors. This standard should be used together with the special technical conditions for wound disc DC servo motors (hereinafter referred to as motors). The specific technical indicators and additional or special requirements of various types of motors are specified in the special technical conditions. 2 Reference standards
GB2829 Periodic inspection counting sampling procedure and sampling table (applicable to the inspection of dust production process stability) GP2900.26 Electrical terminology Control micromotor GB5872 Technical conditions for control micromotor packaging GB7345 Basic technical requirements for control micromotor GB7346 Basic appearance and structure type of control micromotor GB10405 Model naming method for control micromotor 3 Product classification
3.1 Model
3.1.1 Model composition
Deep code
Performance parameter code
Product name code
Frame size
The motor model consists of four parts: motor frame size, product name code, performance parameter code and derived code, which are expressed in the following order and form.
3.1.2 Frame number
Frame number is expressed by the outer diameter of the motor frame (m/s). If the basic dimension of the outer diameter is not an integer, the integer part should be taken. 3.1.3 Product name code
The product name code of the motor is expressed by the capital Chinese phonetic letter SXP, where S represents the type, X represents the wire wound, and P represents the disc type. When the motor and other components form a unit, the unit model composition and name code regulations are shown in Appendix A. State Technical Supervision Bureau 19.93-12-30 Approved 1994-10-01 Implementation
3.1.4 Performance parameter code
CB/T 14818-93
The performance parameter code of the motor consists of two Arabic numerals, and its expression range is 01~99. The motor parameters represented by the performance parameter code should include: rated power, rated speed, rated positive and rated current. The specific values are specified by the special technical conditions.
3.1.5 Derived code
When the motor structure type is different from the basic structure, it is a derived product. The derived product should be represented by a derived code. The derived code is represented by uppercase Chinese phonetic characters A, B, C..…, etc. H shall not use the two letters \]\ and "O\. 3.1.6 Type special example
250SXP
The first variety of structural derivation
Performance parameterization number
Wire-wound disc type DC servo motor
Machine base outer diameter 250mm
3.2 Basic structural type
The basic structural type of the motor is in accordance with Figures 1 to 3 and Table 1. Table 1
Machine base number
Installation method
Shaft extension type
Schematic diagram||tt| |130 or less
Flange installation
Smooth shaft
130~200 or less
Flange stop installation
Keyed shaft
200 and above
Stop, screw hole installation
Keyed shaft
Dimensions of d, MS, D, Dz, D,, p1, tz, tstts, E, h, h1. in Figures 1, 2 and 3 are specified in the special technical conditions.
4 Uniform distribution
4 Technical requirements
4.1 Environmental conditions for use
CB/T 14818--93
The operating environment of the motor should be selected from the Class 1 or Class 2 environmental conditions specified in GB7345, or can be specified in the special technical conditions.
4.2 Circuit diagram
The circuit diagram of the motor is shown in Figure 4.
4.3 Terminals or lead wires
4.3.1 Lead wire method
GB/T 14818—93
The motor lead wires can be lead wires, terminal blocks or sockets. If there are no special provisions in the special technical conditions, motors with frame sizes greater than 130 can use terminal blocks or sockets.
The length of the motor lead wires shall comply with Article 3.9.1 of GB7345 or in the special technical conditions. It is allowed to lead wires in other ways as specified in the special technical conditions, but the requirements and markings shall be clearly specified in the special technical conditions. 4.3.2 Strength of terminal or lead wires
The strength of terminal or lead wires shall comply with Article 3.9 of GB7345. 4.3.3 Lead wire marking
4.3.3.1 Digital marking
When the motor is connected in the form of a terminal block When the motor leads out in lead-out mode, the terminal shall be marked with two Arabic numerals \1""2\. 4.3.3.2 Color marking
When the motor leads out in lead-out mode, the colors of the two lead-out wires shall be selected from the following two groups of colors, A and B. Group A: red, yellow, blue
Group B: black, white, gray
4.4. Appearance and assembly quality
4.4.1. Appearance
The appearance of the motor shall comply with the relevant provisions of Article 3.2.1 of GB7345. 4.4.2 Appearance and installation dimensions
The appearance and installation dimensions of the motor shall comply with the provisions of the special technical conditions. 4.4.3 Axial clearance
The axial clearance of the motor shall comply with the provisions of Table 2. Table 2
Frame size
Axial runout
4.4.4 Radial runout of shaft
0.05~0.10
130~200
0. 05 ~ 0. 15
The radial runout of the motor shaft extension outer circle matching part shall comply with the provisions of Table 3. 200
0. 10~0. 20
Frame size
Radial runout
GB/T 14818—93
4.4.5 Coaxiality of mounting matching surface and total runout of mounting matching end face>160~250
The coaxiality of the motor mounting matching surface and total runout of the mounting matching end face shall comply with the provisions of Table 4. Table 4
Machine frame number
Coaxiality of installation matching surface
Total runout of installation matching end surface
4.5 Dielectric strength of insulation
70-~160
The armature winding of the motor should be able to withstand the dielectric strength test of 50Hz frequency, sinusoidal test voltage specified in Table 5, and duration of 1in. The result should be no breakdown or arcing, and the peak value of winding leakage current should not exceed 5mA. After the test, measure the insulation resistance, and the result should meet the requirements of Article 4.6. Table 5
Rated voltage of motor
>20 ~60
>60--115
>115~220
Dielectric strength of insulation test voltage (effective value)250www.bzxz.net
750-25
1 000-%
1500-48
When the insulation dielectric strength test is repeated, the test voltage is 80% of the specified value, V
For mass-produced motors, when the insulation dielectric strength test is carried out, the test voltage is allowed to be increased to 120% of the value specified in Table 5, and the test time is shortened to 15
4.6 Insulation resistance
The insulation resistance between the armature winding of the motor and the housing should be no less than 100M under normal climatic conditions; no less than 50MA under the extreme low temperature conditions specified in the special technical conditions; and no less than 10MQ under the corresponding extreme high temperature environment. After the constant damp heat test, the insulation resistance measured in the box should be no less than 2Ma. The voltage value of the megohmmeter used for insulation resistance inspection should comply with the provisions of Table 6. Table 6
Insulation dielectric strength test voltage
500~1000
Megohmmeter voltage
4.7 Direction of rotation
GB/T 14818—93
When the motor is connected according to the following wiring method, the rotation direction of the motor should be counterclockwise from the end of the drive shaft of the motor and this is defined as the positive direction.
Wiring method:
a. When the terminal is a terminal block, the positive pole of the power supply is connected to the mark "1" and the negative pole of the power supply is connected to the mark "2"; b. When the terminal is a lead-out wire, the wire of the thin color group A (see 4.3.3.2) is connected to the positive pole of the power supply, and the wire of group B is connected to the negative pole of the power supply.
4.8 No-load technical data
4.8.1 No-load starting voltage
The no-load starting voltage of the motor in both the forward and reverse directions shall comply with the provisions of the special technical conditions. 4.8.2 No-load current
When the motor is running in both the forward and reverse directions at rated voltage, the maximum value of its armature current is the no-load current. Its value shall comply with the provisions of the special technical conditions.
4.8.3 No-load speed
The no-load speed of the motor shall comply with the provisions of the special technical conditions. 4.8.4 Positive and negative speed difference
When the motor is running at rated voltage and rated torque, the rated speed in both the forward and reverse directions is measured. The difference between the rated speed in both the forward and reverse directions is the positive and negative speed difference, and its value shall comply with the provisions of the special technical conditions. 4.9 Overspeed
The motor shall be able to withstand an overspeed test of 1.2 times the rated speed or 1.15 times the no-load speed (the higher of the two) for 2 minutes. After the test, the motor fasteners shall not be loose, and the structural parts shall not have harmful deformation that affects normal operation. 4.10 Rated technical data
The rated technical data of the motor shall comply with the provisions of the special technical conditions. The special technical conditions shall give the following rated technical data: a.
Rated power or rated torque;
Rated voltage;
Rated current:
Rated speed.
The tolerance range of the rated speed shall be within ±10%. 4.11 Armature terminal resistance
The armature circuit resistance value (20°C) measured from the motor lead wire, including the lead wire, brush resistance and brush contact resistance is the armature terminal resistance. Its value shall comply with the provisions of the special technical conditions. 4.12 Back EMF coefficient
When the motor is at rated speed, the back EMF value generated by kr/min is called the back EMF coefficient. The unit is V/kr, min-1. Its value and its tolerance shall comply with the provisions of the special technical conditions.
4.13 Torque constant
The torque constant is calculated by formula (1):
C, -9. 55X 10-30.
Where: C-torque constant, N·m/A
..-back electromotive force coefficient, V/kr·in-
C. The value should comply with the provisions of the special technical conditions. 4.14 Electrical time constant
The electrical time constant of the motor should not be greater than the value specified in the special technical conditions. <1)
4.15 Mechanical time constant
GB/T 14818-93
The mechanical time constant of the motor should not be greater than the value specified in the special technical conditions. 4.16 Armature moment of inertia
The armature moment of inertia of the motor should not be greater than the value specified in the special technical conditions. 4.17 Working current during operation
The motor is subjected to an overload test with 4 times the rated current as the overload current for 1s. After the test, check the no-load speed in the dead direction under the rated voltage. The deviation between its value and the no-load speed before the test should not exceed 2% of the tested load speed. 4.18 Weight
The weight of the motor should not exceed the specified value of the special technical conditions. 4.19 Temperature rise
When the motor is running stably under the rated working condition, the temperature rise of the armature winding should not exceed the temperature rise limit specified in the table or the specified value of the special technical conditions.
Table? Temperature rise limit
Insulation level
Environmental condition level
4.20 Commutation spark
When the motor is under the rated working condition, the spark level on the commutator when rotating in the forward and reverse directions should not exceed level 1 specified in Article 8.1 of GB755.
4.21 Low temperature
The motor shall be able to withstand the low temperature test under the extreme low temperature conditions specified in the special technical conditions. Immediately after the test, check the insulation resistance and no-load starting voltage of the motor. The insulation resistance shall comply with the provisions of Article 4.6, and the no-load starting voltage shall not be greater than 3 times the value specified in Article 4.8.1. The armature and structural parts shall not produce harmful deformation that affects normal operation. 4.22 High temperature
The motor shall be able to withstand the high temperature test under the extreme high temperature conditions specified in the special technical conditions. During the test, the motor is operated at rated voltage and rated speed to the stable operating temperature after power-on. Immediately after the test, check the insulation resistance and insulation dielectric strength of the motor, and the results shall comply with the provisions of Articles 4.6 and 4.5. After the test, the structural parts of the motor shall not produce harmful deformation that affects normal operation, and the bearing grease shall not overflow. 4.23 Fixed amplitude vibration
The motor shall be able to withstand the fixed amplitude vibration test under the conditions specified in Table 8. After the test, the motor shall not have loose fasteners or damage, and the structural parts shall not have harmful deformation that affects normal operation. Table 8
Frame number
Double-width
Shaft extension direction
Horizontal, upward
Specified by special technical conditions
During the fixed amplitude vibration test, the motor's power-on mode, monitoring items and methods shall all comply with the provisions of the special technical conditions. 4.24 Specified pulse shock
Test time
2h in each of the three directions, 6h in total
The motor shall be able to withstand the specified pulse shock test with the shock waveform of half-stopped sine wave and duration of 11m5 under the conditions specified in Table 9. After the test GB/T 14818--93
, the motor fasteners shall not be loose or damaged, and the structural parts shall not have harmful deformation that affects normal operation. Immediately after the test, check the rated technical data of the motor, and the results shall comply with the provisions of Article 4.10. Table 9
Frame number
Peak impact acceleration, m/s
Shaft extension direction
Horizontal, upward, downward
Specified by special technical conditions
Number of impacts
6 times in each direction, 18 times in total
Specified During the pulse impact test, the motor's power-on mode, monitoring items and methods shall all comply with the provisions of the special technical conditions. 4.25 Steady damp heat
The motor shall be able to withstand a constant sensible heat test of 96 hours at a relative humidity of 90% to 95% and a temperature of 10℃ ± 2℃. At the end of the test, the insulation resistance of the motor is measured in the box, and its value shall not be less than 2M0. The motor shall not have obvious deterioration of the surface quality and rust that affects normal operation.
4.26 Life
The life of the motor is divided into the following levels: Class A: 2 000h;
Class B: 1 500h;
Class C: 1 000h;
Class D: 500h.
The selection of specific life time levels is specified by the special technical conditions. The motor should be able to work normally and reliably within the life time specified in the special technical conditions. During the life test, the motor shall not be subjected to any form of maintenance, repair or replacement of parts.
After the life test, the motor parts should be free of damage, and the rated data should be checked to comply with the provisions of Article 4.10. 5 Test method
5.1 Test conditions
5.1.1 Air-continuous conditions
The test climatic conditions of the motor shall comply with the provisions of Article 3.1.1 of GB7345. 5.1.2 Test power supply
The test power supply is a DC power supply with a ripple factor of no more than 3% and a voltage instability of no more than 2%. 5. 1. 3 Accuracy of measuring instruments
The accuracy of the ammeter and voltmeter shall not be less than Class 1 during the inspection test and acceptance test, and shall not be less than Class 0.5 during the identification test and periodic test. The accuracy of the tachometer shall be Class 1.
The accuracy of the torque test device is 1%
The accuracy of other test equipment and instruments shall comply with the provisions of the special technical conditions. 5.1.4 Installation of the motor
Unless otherwise specified, the motor shall be installed with the shaft extension horizontally on the test bracket specified in the special technical conditions for testing. The equivalent heat dissipation area of the test bracket shall not exceed the surface area of the temperature rise test board of the motor under test. 5.1.5 Stable temperature
The stable working temperature with power on and the stable temperature without power on shall be in accordance with the provisions of 3.1.5.2 and 3.1.5.1 of GB7345. 5.2 Terminals or lead wires
5 2 1 Lead wire style and certification
GB/T 14818-93
Visual inspection The lead wire style of the motor shall meet the requirements of 4.3.1. Ⅱ Check the terminal or lead wire marking. The result shall meet the requirements of 4.3.3.1 or 4.3.3.2. 5.2.2 Strength of terminal or lead wire
Check the strength of the terminal or lead wire according to the methods specified in 3.19.1 and 3.9.2 of GI37345, and the result shall meet the requirements of 4.3.2. 5.3 Appearance and assembly quality
5.3.1 Appearance
Visual inspection The appearance quality of the motor shall meet the requirements of 1.1.1. 5.3.2 Shape and installation dimensions
Use a measuring tool that can ensure the dimensional accuracy requirements to check the shape and installation dimensions of the motor. The results shall meet the requirements of 4.4.2. 5.3.3 Axial clearance
Inspect according to the method specified in 3.2.2 of GB7345. The results shall meet the requirements of 4.4.3 requirements. The value of the axial force during inspection is specified by the special technical conditions. 5.3.4 Shaft extension radial runout
Inspect according to the method specified in Article 3.2.4 of GB 7345. The result should meet the requirements of Article 4.4.4. 5.3.5 Coaxiality of the mounting mating surface and the total runout of the mounting mating end face. For motors with a frame size less than 130, measure using the method specified in Article 3.2.5 of GB7345. For motors with a frame size of 130 and above, fix the base of the dial gauge to the shaft, rotate the rotor to measure the total runout of the mounting mating end face.
The measurement result should meet the requirements of Article 4.4.5.
5.4 Insulation dielectric strength
Inspect the insulation dielectric strength between the armature winding and the housing according to the method specified in Article 3.7 of GB7345 and Article 4.5 of this standard, and the result should meet the requirements of Article 4.5.
5.5 Insulation resistance
Use the megohmmeter specified in Table 6 of Article 4.6 to check the normal insulation resistance between the armature winding and the housing. The value shall comply with the requirements of Article 4.6. 5.6 Direction of rotation
The motor shall be wired and powered according to the provisions of Article 4.7, and the direction of rotation of the shaft shall comply with the requirements of Article 4.7. 5.7 Technical data for no-load
5.7.1 No-load starting voltage
Before the test, the motor shall be operated at rated voltage for 5 minutes and then stopped until the stable temperature without power is reached. During the test, the motor shall be applied with zero starting voltage and uniformly, slowly and gradually increased until the shaft starts to rotate continuously. Each direction of rotation shall be measured three times, and the voltage that causes the shaft to start to rotate continuously shall be recorded for the sixth time. The maximum value is the no-load starting voltage, and its value shall comply with the requirements of Article 4.8.1. 5.7.2 No-load current
The motor shall be operated at rated voltage and no-load, and the armature current shall be measured after the stable operating temperature with power is reached. Measure once in both the forward and reverse directions. The larger armature current is the no-load current, and its value should not exceed the requirements of Article 4.8.2. 5.7.3 No-load speed
The motor runs at no-load for 5 minutes at rated voltage, and then uses a tachometer that can ensure accuracy to measure the no-load speed of the motor in both the forward and reverse directions. The value should meet the requirements of Article 4.8.3.
5.7.4 Forward and reverse speed difference
The motor runs at rated voltage and rated torque, measures the rated speed in both the forward and reverse directions, and calculates the forward and reverse speed difference, which should meet the requirements of Article 4.8.4.
5.8 Overspeed
According to Article 4.9, the motor is applied with voltage and runs at no-load for 2min. The result should meet the requirements of Article 4.9. 5.9 Rated technical data
GB/T 1481893
Apply rated voltage and rated torque to the motor to make it run under rated working conditions. After reaching the stable working temperature, measure the speed and current in both the forward and reverse directions and calculate the corresponding output power. The rated data in both the forward and reverse directions shall meet the requirements of 4.10. This test may be carried out using the cold equivalent method during the inspection test or acceptance test. 5.10 Armature terminal resistance
After the motor reaches the stable temperature without power supply, use a bridge or other instrument that can ensure the measurement accuracy to measure the armature terminal resistance at four different positions of the armature, and take the average value. Then convert the test resistance to the value of 20C, which shall meet the requirements of 4.11. 5.11 Back EMF coefficient
Use a steady-speed power device to drive the motor to run as a no-load generator at rated speed. Measure the output potential of the motor in this state. The back EMF coefficient is calculated using formula (2):
C. =1 000
Where: C is the back EMF coefficient, V/kr · min-!; E is the measured output potential, V;
is the motor speed, r/min.
The back EMF coefficient shall comply with the requirements of 4.12. 5.12 Torque constant
Use the formula (1) in 4.13 to calculate the torque constant, and its value shall comply with the requirements of 4.13. 5.13·Electrical time constant
Block the motor rotor, apply a step voltage to the motor, and use a memory oscilloscope or other instrument that can ensure the measurement accuracy to measure the waveform of the armature current changing with time. During the test, the value of the step voltage should make the steady-state value of the armature current reach the rated current of the motor. Find the time required for the armature current to rise from zero to 63.2% of the steady-state value on the waveform diagram. This time is the electrical time constant of the motor. The result shall comply with the requirements of 4.14.
Electrical time constant can also be measured by other test methods that can ensure accuracy. 5.14 Mechanical time constant
The mechanical time constant of the motor is calculated by formula (3), and the result should meet the requirements of Article 4.15. J,R(20T)
Tm=0. 104 7
Where: n-
R(20'C)-
Mechanical time constant, ms
Armature rotation slowness, kr·m;
Armature resistance at 20℃, 0,
C. Back electromotive force constant, V/kr·min\\
CTorque band number, N·m/A
The mechanical time constant can also be measured by other test methods that can ensure accuracy. 5.15 Armature moment of inertia
The armature inertia of the motor shall be tested in accordance with the method specified in Article 3.10 of GB7345. The result shall comply with the requirements of Article 4.16. 5.16 Instantaneous working current
(3)
Block the motor rotor and apply a cascade voltage to make the motor armature current reach the instantaneous working current value specified in Article 4.17. The test time shall not exceed the requirements of Article 4.17.
The motor shall be tested for instantaneous working current once in both the forward and reverse directions. After the test, wait for the motor to cool down to the pre-test temperature, and measure the no-load speed of the motor in the stop direction under the rated medium voltage. The value shall comply with the requirements of Article 4.17. 5.17 Weight
Use a scale with an inductance not greater than 1% to weigh the weight of the motor. The result shall comply with the requirements of Article 4.18. 518 Ju Sheng
GB/T14818—93
Before the test, the motor reaches the non-powered stable temperature under normal climatic conditions and is fixed on the temperature rise test bracket. The structure, size and material of the temperature rise test bracket refer to the provisions of the appendix. The test environment should not be affected by external radiation and air sparseness. Before the test begins, measure the cold armature terminal resistance R of the motor and the room temperature. Then apply rated voltage and rated torque to the motor until it reaches the stable operating temperature. Measure the armature terminal resistance R at this time and calculate the armature winding temperature rise at room temperature t2 according to formula (4):
Where: —— armature winding temperature rise, K;
R=R(235+t)+(t-2)
R-cold electrical winding DC resistance,
R,--- armature winding DC resistance at the end of the test, #—ambient temperature when measuring R,, ℃
t2ambient temperature when measuring R.℃.
R, should be measured within 20s after the motor is powered off. If it cannot be completed within 20s, it is necessary to measure the values of two points with the actual test time as the interval, and then use the regression method to determine the cooling curve of the motor and find the resistance value when the motor is powered off as the value of R,. When measuring R and R, the armature should be at the same position. The temperature rise of the armature winding is allowed to be measured by other methods that can ensure the test accuracy. The test results should meet the requirements of Article 4.19. 5.19 Commutation Spark
The motor works at rated voltage and rated torque until it reaches the stable working temperature of power on. Observe the commutation spark under the brush, and the spark level should meet the requirements of Article 4.20.
5.20 Low Temperature
The motor is installed on the test bracket specified in the special technical conditions and placed in the test box. During the test, the motor is not powered on, and the box temperature drops to the extreme low temperature value specified in the special technical conditions, with a temperature difference of 2°C. The motor reaches the non-powered stable temperature under this condition. Measure the insulation resistance and no-load starting voltage of the motor in the box, and the results should meet the requirements of Article 4.21. 5.21 High Temperature
The motor is installed on the test bracket specified in the special technical conditions and placed in the test box. The box temperature gradually rises to the extreme high temperature value specified in the special technical conditions, with a temperature difference of 2°C. Then apply rated voltage and rated torque to the motor and run it until it reaches the power-on stable operating temperature. Check the insulation resistance of the motor in the box. After leaving the box, immediately carry out the insulation dielectric strength test according to the retest voltage. The test results should meet the requirements of Article 4.22.
It is allowed to carry out high temperature tests by other methods under the test conditions of Article 4.22. 5.22 Fixed amplitude vibration
The motor shall be subjected to fixed amplitude vibration test according to the method specified in Article 3.18.1 of GB7345 and the conditions specified in Article 4.23 of this standard. The results shall meet the requirements of Article 4.23.
5.23 Specified pulse impact
The motor shall be subjected to the specified pulse impact test according to the method specified in Article 3.19.1 of GB7345 and the conditions specified in Article 4.21 of this standard. The results shall meet the requirements of Article 4.24.
5.24 Constant mixed heat
The motor is subjected to a constant damp heat test according to the method specified in Article 3.21.1 of GB7345 and the conditions specified in Article 4.25 of this standard. The result shall meet the requirements of Article 4.25.
5.25 Life
The motor is installed on the test bracket specified in the special technical conditions, and the motor is operated under rated conditions by the dragging method or other mechanical load methods, and the rotation direction is changed every 24 hours. GB/T 14818-93
The life test time is allowed to be calculated cumulatively, but each operation shall not be less than 4 hours. The monitoring items during the life test and the inspection items of the life test shall be implemented in accordance with the special technical conditions. In the life test, for motors with a frame size not greater than 130, the installation method and life time distribution shall be implemented in accordance with Article 3.22 of GB7345; for motors with a frame size greater than 130, it shall be implemented in accordance with the special technical conditions. 6 Inspection rules
6.1 Test classification
The motor tests are divided into: inspection test, acceptance test, identification test and periodic test. 6.2 Inspection test items and rules
6.2.1 Inspection items
The inspection test items and basic sequence shall be carried out in accordance with the provisions of Table 10. 6.2.2 Inspection rules
Each motor shall be inspected and tested.
The motor can only be put into storage as a finished product after all inspection test items are qualified. 6.3 Acceptance test items and rules
6.3. 1 Test items
The acceptance test items and basic sequence are the same as those of the inspection test. 6.3.2 Acceptance rules
The acceptance rules shall be implemented in accordance with Article 4.3 of GB7345. The acceptable quality level (AQL) is 2.5. 6.4 Identification test items and specifications
6.4.1 Test items
The items, basic sequence and prototype number of the identification test shall be in accordance with the provisions of Table 10. 6.4.2 Identification test specifications
The identification test rules shall be in accordance with Article 4.4 of GB7345. 6.5 Periodic test items and rules
6.5. 1 Test items
The items, basic sequence and prototype number of the periodic test shall be in accordance with the provisions of Table 10. 6.5.2 Periodic test rules
The periodic test rules shall be in accordance with Article 4.5 of GB7345.
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