Some standard content:
UDC621.396：665
National Standard of the People's Republic of China
GB/T15640—1995
General specification for
mixing consoles
Published on July 24, 1995
Implemented on March 1, 1996
Published by the State Administration of Technical Supervision
National Standard of the People's Republic of China
General specification for
mixing consoles
Subject content and scope of application
GB/T15640—1995
This standard specifies the classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage requirements of mixing consoles. This standard applies to mixing equipment such as broadcasting, recording and sound reinforcement. 2 Reference standards
GB2828
GB2829
Packaging storage and transportation pictorial signs
Batch inspection counting sampling procedures and sampling tables (applicable to inspection of continuous batches) Periodic inspection counting sampling procedures and sampling tables (applicable to inspection of production process stability) GB 3047.1
GB8898
GB9003
GB9384
GB12060
GB14197
Basic dimension series for panels, racks and cabinets
Validity test of the assumption of constant failure rate for equipment reliability test. Verification test plan for failure rate and mean time between failures under the assumption of constant failure rate for equipment reliability test. Graphical symbols for electrical equipment
Safety requirements for household and similar general purpose electronic and related equipment supplied from the mains supply. Methods of measuring the basic characteristics of mixing consoles
Broadcasting radios, broadcast and television receivers, tape recorders, audio power amplifiers ( Environmental test requirements and test methods for sound system equipment General terminology explanation and calculation method Preferred matching value for interconnection of sound system equipment GB/T14947 SJ/T10406 IEC268-10P IEC268-172 3 Terminology Application of connectors for interconnection of sound system equipment General technical conditions for audio power amplifiers Sound system equipment Part 10: Peak program level meter Sound system equipment Part 17: Standard volume meter The definitions of terms involved in this standard are in accordance with GB12060 and SJ/T10406. Adoption instructions: 1 The translation of IEC268-10 is provided by the National Technical Committee for Standardization of Electroacoustics and Audiovisual Equipment. 2The translation of IEC268-17 is provided by the National Technical Committee for Standardization of Electroacoustics and Audiovisual Equipment. Approved by the State Administration of Technical Supervision on July 24, 1995 and implemented on March 1, 1996
4 Product classification and calibration method
4.1 Classification
GB/T15640—1995
Mixing consoles are divided into two categories: professional and general. Professional includes professional I and professional I mixers, and general includes general I and general I mixers.
4.2 Calibration method
Main title: indicates the product nameplate and model (determined by the manufacturer). Subtitle: product program.
Product program representation method: //.
That is, after the horizontal line, the first digit indicates the number of input channels, the second digit indicates the number of group output channels, and the third digit indicates the number of main output channels. 5 Technical requirements and test methods
5.1 Conditions of use
Environmental temperature: -10~40℃;
Relative humidity: <90%;
Atmospheric pressure: 86~106kPa
AC voltage: 220±22V;
Power frequency: 50±2Hz.
5.2 Measurement conditions
Except for the following provisions, other conditions shall comply with the provisions of GB9003. 5.2.1 Climate conditions
Environmental temperature: 15~35℃,
Relative humidity: 45%~75%
Atmospheric pressure: 86~106kPa.
5.2.2 Power supply
AC power supply:
AC voltage: 220±4.4V
Power frequency: 50±1Hz,
Power waveform distortion: ≤5%.
DC power supply:
Power voltage tolerance: 2%;
Power ripple voltage: <1.0mV.
5.2.3 The measurement frequency can be selected from the following preferred frequencies: 20, 31.5, 40, 63, 80, 125, 250, 500Hz, 1, 2, 4, 8, 12.5, 16, 20kHz. 5.3 Appearance, structure, functional requirements and inspection methods 5.3.1 Appearance, structure, functional requirements
The product appearance should be neat and tidy, and there should be no obvious dents, scratches, cracks, deformations, burrs, mildew spots on the surface. The surface coating should not bubble, crack or fall off.
Metal parts should not have rust or other mechanical damage, and the injection material should not overflow. The operation of switches, buttons and knobs should be flexible and reliable, with good hand feel. The parts should be tightened without looseness, and the structure should have sufficient rigidity and mechanical stability.
Functional graphic symbols, marks and text descriptions should be concise, clear, correct and firm. Graphic symbols should comply with the relevant provisions of GB5465.2. Various functions and display functions should be able to work normally. Regarding the display function, professional class 1 requires compliance with IEC268-10 and IEC268-17, and 2
Other classes should comply with the provisions of product standards. GB/T15640—1995
The overall dimensions and installation requirements of the complete machine or power supply that can be installed on the standard rack shall comply with the relevant provisions of GB3047.1. The electrical performance and structural requirements of the connection terminals of the complete machine shall comply with the relevant provisions of GB14197 and GB/T14947. 5.3.2 Inspection methods for appearance, structure and function Check by visual inspection and hand feel according to the requirements of Article 5.3.1. If there is any objection, the test method of the corresponding project can be used and determined by instruments or measuring tools.
5.4 Function setting
It is specified by the product standard, and the specific requirements are agreed upon by the manufacturer and the user (including the distributor, the same below). For professional category I, the necessary functions are selected by the product standard, and the special functions are proposed by the user. 5.4.1 Essential functions
Input attenuation: fixed, continuous;
Phantom power, AB power;
Phase switch: line/microphone input switch, high-pass filter, low-pass filter;
Equalizer: four-band parametric or semi-parametric equalization; variable bandwidth (step, continuous), access switch, insert terminal;
Channel allocation;
Mute control, solo control;
Pause control;
Channel monitoring control;
Sound and image control;
Channel direct output,
Auxiliary Channel,
Main output channel: L/R;
Group output channel;
Mono output channel;
Auxiliary output channel;
Return input channel;
Input balance;
Output balance (0VU=+4dBm),
Monitor output and control: headphones (low impedance), studio monitor; Input level indication/level overload indication,
Output level indication: VU meter/PPM meter,
Correlation meter;
Self-test signal source and level control;bzxz.net
Two-track monitoring.
5.4.2 Special functions. Such as:
Intercom: intercom (simplex), system intercom (duplex); remote control: recorder function control, override control; memory function/automatic downmixing;
voltage-controlled level control/level pressure limit control:
jumper board/lumped input and output,
long distance interface,
digital interface;
voice control channel;
MIDI interface.
5.5 Electrical performance requirements and measurement methods
5.5.1 Electrical performance requirements
Electrical performance requirements are shown in Table 1.
5.5.2 Measurement methods
Perform according to GB9003.
5.6 Safety requirements and test methods
Perform inspection according to the relevant provisions of GB8898.
5.7 Environmental requirements and test methods
GB/T15640—1995
Perform in accordance with the provisions of GB9384 and this standard. Among them, professional Class I mixers shall be specified in the product standard or agreed upon by the manufacturer and the user. The main performance parameters, requirements and corresponding measurement methods to be tested after the environmental test shall be in accordance with the provisions of Table 2. 5.7.1 High temperature load
5.7.1.1 Requirements
Unpackaged mixers shall be able to work continuously for 12 hours at 40±2℃, and their appearance, structure and functions shall comply with the requirements of Article 5.3.1. 5.7.1.2 Test methods
Perform in accordance with Article 2.1.3 of GB9384, and after the test, inspect in accordance with Article 5.3.2 of this standard. 5.7.2 High temperature storage
5.7.2.1 Requirements
Unpackaged mixers are placed at an ambient temperature of 55±2℃ for 2 hours. After 2 hours of recovery, their appearance, structure, function and main performance parameters shall meet the requirements of Article 5.3.1 and Table 2 respectively. 5.7.2.2 Test method
Perform the test in accordance with Article 2.2.3 of GB9384. After the test, inspect the test in accordance with Article 5.3.2 and Table 2. 5.7.3 Steady heat
5.7.3.1 Requirements
Unpackaged mixers are placed at a temperature of 40±2℃ and a relative humidity of (93)% for 48 hours. After 4 hours of recovery, their appearance, structure, function and main performance parameters shall meet the requirements of Article 5.3.1 and Table 2 respectively. 5.7.3.2 Test method
Perform the test in accordance with Article 2.3.3 of GB9384. After the test, inspect according to Article 5.3.2 and Table 2. 5.7.4 Low temperature load
5.7.4.1 Requirements
After the unpackaged mixer is placed at a temperature of -10±3℃ for 2h, it should be able to work for 1h. Its appearance, structure and function should meet the requirements of Article 5.3.1.
5.7.4.2 Test method
Perform the test in accordance with Article 2.4.3 of GB9384. After the test, inspect according to Article 5.3.2. 5.7.5 Low temperature storage
5.7.5.1 Requirements
Unpackaged mixers shall be placed at -25±3℃ for 2 hours. After 2 hours of recovery, their appearance, structure, function and main performance parameters shall meet the requirements of Article 5.3.1 and Table 2 respectively. 5.7.5.2 Test method
Perform the test in accordance with Article 2.5.3 of GB9384. After the test, inspect the test in accordance with Article 5.3.2 and Table 2. 4
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GB/T15640—1995
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5.7.6 Sweep frequency vibration (sine)
5.7.6.1 Requirements
Parameter name
Rated gain
GB/T15640—1995
Equivalent input noise source electromotive force
Frequency response
Total harmonic distortion
As specified in Table 1
Measurement method (Article number in GB9003)||tt ||Unpackaged mixers should be able to withstand the sweep vibration test specified in Table 3 and should be able to work after the test. Their appearance, structure and function should meet the requirements of Article 5.3.1.
Frequency range
10~30~10
30~55~30
Displacement amplitude
Number of cycles on each axis
Perform a cyclic sweep within a certain frequency range at a sweep rate of loct/min (f1 shown as:
T=8.644g(
Where: T——time;
f1——sweep lower limit frequency,
f2——sweep upper limit frequency.
5.7.6.2 Test method
The sample should vibrate in turn on three mutually perpendicular axes according to the working position
According to Article 3.1.3 of GB9384 After the test, it shall be inspected in accordance with the provisions of Article 5.3.2. 5.7.7 Collision
5.7.7.1 Requirements
→f1) The time is as shown in formula (1)
The unpackaged mixing console shall be able to withstand a collision test with an acceleration of 10g, a pulse duration of 16ms, a pulse repetition frequency of 40~80 times/min, a number of collisions of 1000±10 times, and a pulse waveform that is approximately a half-sine wave. It shall be able to work after the test, and its appearance, structure, and function shall comply with the requirements of Article 5.3.1.
5.7.7.2 Test method
It shall be carried out in accordance with the provisions of Article 3.2.3 of GB9384. After the test, it shall be inspected in accordance with Article 5.3.2 of this standard. 5.7.8 Drop
5.7.8.1 Requirements
The packaged mixing console shall be able to withstand the drop test specified in Table 4. After the test, its appearance, structure, and function shall be able to work. The energy and main performance parameters shall meet the requirements of Article 5.3.1 and Table 2 respectively.
Sample weight
≥10~20
≥20～30
≥30~40
≥40~50
5.7.8.2 Test method
Drop height
GB/T15640—1995
Surface drop
Drop Falling surface
The figure shows the normal working position of the sample. It falls downward in the order of 3
2-54-6 (2
is the front side, the top side does not fall)
Falling height
Edge and corner falling
Falling edge
Falling edge
is falling
Carry out according to Article 3.3.3 of GB9384. After the test, inspect according to Article 5.3.2 and Table 2. 5.8 Reliability requirements and test methods
Drop angle
Drop angle
is the number of drops
on any
side of the
front||of the sample
on each side
5.8.1 The reliability of mass-produced mixers is expressed by the mean time between failures (MTBF). The lower limit of the MTBF of the product should be greater than or equal to 1000h.
5.8.2 Reliability test
5.8.2.1 Statistical test plan
The statistical test plan is a statistical method used to determine whether the mixer meets the specified reliability requirements. It is based on the assumption that the failure distribution of the mixer conforms to the exponential distribution law. The test adopts the timed end test method. The statistical test plan should comply with GB5080.7 and the provisions of this standard, see Table 5. The finalization test should be carried out according to Scheme 1 in Table 5. 5.8.2.2 Test requirements
a. Aging pretreatment
Whether the product is subjected to aging pretreatment before leaving the factory can be specified in the product standard. If aging pretreatment is adopted, the pretreatment time and pretreatment stress requirements of the sample and the batch of products it represents are exactly the same, and no special pretreatment measures shall be taken. b. Test samples
The test samples shall be randomly selected from the batch of products that have passed the inspection, and the samples shall not be unqualified in appearance, structure and function after unpacking inspection.
c. Test equipment
The test equipment shall be able to provide various conditions required for the test, and the laboratory shall have exhaust, safety, alarm and fire protection measures. d. Test conditions
Ambient temperature: 40±3℃;
Relative humidity: 45%~75%,
Atmospheric pressure: 86~106kPa;
Working voltage: 220±22V.
Judgement risk rate
5.8.2.3 Test method
Discrimination ratio Dm
GB/T15640—1995
Total test time T
(multiples)
Number of samples n
Test time to
Judgment criteria
(Number of failures)
Rejection and acceptance
&. Place the test sample in the high temperature test room. When the ambient temperature, relative humidity, etc. reach the specified test conditions, power on the sample and start timing.
b. The sample is powered on for 5.5 hours and turned off for 0.5 hours as a working cycle. The test can be interrupted between working cycles, but the interruption time shall not exceed 24 hours.
In each working cycle, each sample should work under normal working conditions. C.
The following should be checked during each working cycle: d.
Whether various functions work normally;
Whether various switches, buttons, knobs, and jacks work normally. Calculation of test time:
The test time of each sample should be at least half of the average test time of all samples. When this requirement cannot be met, when failure occurs, the method of replacing the sample is not used, but the method of extending the test time is used to ensure the total test time T. When the failure time cannot be accurately determined, the middle value of the last two inspection record times should be taken as the time of failure. f. During the entire reliability test process, various test conditions should be recorded on time and truthfully, and abnormal conditions during the test, problems found during the inspection, and the time of discovery should be recorded at any time. g. When a fault is found, it should be checked in a high-temperature room. Only after it is determined to be a failure can it be taken out of the high-temperature room and the cause of the failure should be analyzed and checked. Then the failed sample is repaired or trimmed, but the parts that have not failed shall not be repaired or replaced. 5.8.2.4 Failure criteria and calculation
Any Class A non-conforming item of the functional control parts listed in Table 7 shall be judged as a failure. When a safety non-conforming item is found, the test must be stopped immediately and judged as a failure. Class B non-conforming items shall not be judged as failures, but the reasons shall be recorded and analyzed. Failure classification:
Independent failure: failure of the whole machine caused by the failure of a certain component or part; Dependent failure: other failures caused by a certain failure or the same reason; Repeated failure: failures caused by the same reason twice or more in the test. c. Calculation of failure
Each failure of independent failure and repeated failure shall be counted in the number of failures; Dependent failure shall not be counted in the number of failures;
Failures caused by operating errors in the test shall not be counted in the number of failures; failures that occur in the test and can be recovered at room temperature shall be judged as failures regardless of whether the failures are repeated. 9
5.8.2.5 Validity test of exponential distribution assumption GB/T15640—1995
When the test is finished and the number of failures r is greater than 3, the exponential distribution assumption should be tested according to the method specified in GB5080.6 before the reliability test conclusion is made. If the test results meet the exponential distribution assumption, the test conclusion can be made. If the test results do not meet the exponential distribution assumption, further analysis should be conducted to determine the reasons for rejection, and measures should be taken to improve them before conducting the reliability test. 5.8.2.6 One-sided interval estimation of mean time between failures The lower limit of mean time between failures (MTBF) is expressed as the one-sided interval estimation of MTBF, and its calculation formula is as follows: 2T
MTBF (lower limit)
)=x(c,2r+2)
Where: C——confidence level, C=1-β
-total number of failures;
T——total test time, h,
2——quantile of distribution.
6 Inspection rules
Quality inspection includes finalization inspection, acceptance inspection and routine inspection. 6.1 Finalization inspection
These rules apply to design finalization inspection, production finalization inspection and other finalization inspections of products. 6.1.1 Inspection items, requirements and methods
Items, requirements, methods and sample quantity are shown in Table 6. Table 6
Unpacking inspection
Electrical performance measurement
Safety test
Environmental test
Reliability test
According to Article 5.3
According to Article 5.5
According to Article 5.6
According to Article 5.7
According to Article 5.8
According to Article 6.1.3
According to Article 5.5
According to Article 5.6
According to Article 5.7
According to Article 5.8
Quantity (sets)
Total number of samples
According to Scheme 1 of Table 5
(2)
For products with different types and functions added or reduced derived from products that have passed production finalization, it is allowed to simplify the test items with unchanged stress under the premise of ensuring quality.
Samples for final inspection shall be randomly selected from final batch products. The number of final batch products shall be determined by the manufacturer or the superior competent department. The number of samples shall meet the requirements of each test. 6.1.2 Inspection procedure
The inspection procedure is shown in Figure 1. Among them, electrical performance measurement and environmental test are allowed to be carried out in series. 10
6.1.3 Unpacking inspection
6.1.3.1 Inspection content
Product quality
Machine camera
GB/T15640—1995
Safety inspection
Environmental test
Unpacking and setting up
Expected risk
Figure 1 Flow chart of inspection procedure
Unpacking inspection includes: packaging quality, completeness, appearance, structure and function, see Table 7. The unqualified criterion shall be in accordance with the provisions of Table 7. 6.1.3.2 Inspection method
Use intuitive audio-visual method.
6.1.3.3 Qualification judgment
Unpacking inspection does not allow the presence of Class A defective products, Class B defective products cannot exceed 1 unit; Class C defective products cannot exceed 2 units. The definition of Class AB and Class C defective products shall be in accordance with Article 6.2.5. Table 7
Packaging and transportation
Defective content
a. The packaging box does not match the model of the whole machine
b. The number of samples in the box is insufficient
c. There is no product name, brand (or model), manufacturer, etc. on the surface of the packaging box
d. The packaging box is seriously damaged
e. The cushioning material in the box is missing or seriously damagedf. The certificate of conformity, manual, electrical schematic diagram and the random accessories specified in the manual do not match the machine
8. The spare parts and accessories specified in the manual are missingh. Foreign matter in the box
1. Inverted (the direction of the mark does not match the actual product)jNo manufacturer address in the manual (except for those already indicated on the case or label)
kFactory date, quality mark missing or wrong
Unqualified category1 Finalization inspection
These rules apply to product design finalization inspection, production finalization inspection and other types of finalization inspection. 6.1.1 Inspection items, requirements and methods
The items, requirements, methods and sample quantity are shown in Table 6. Table 6
Unpacking inspection
Electrical performance measurement
Safety test
Environmental test
Reliability test
According to Article 5.3
According to Article 5.5
According to Article 5.6
According to Article 5.7
According to Article 5.8
According to Article 6.1.3
According to Article 5.5
According to Article 5.6
According to Article 5.7
According to Article 5.8
Quantity (sets)
Total number of samples
According to Scheme 1 of Table 5
(2)
For products with different types and functions added or reduced derived from products that have passed production finalization, it is allowed to simplify the test items with unchanged stress under the premise of ensuring quality.
Samples for final inspection shall be randomly selected from final batch products. The number of final batch products shall be determined by the manufacturer or the superior competent department. The number of samples shall meet the requirements of each test. 6.1.2 Inspection procedure
The inspection procedure is shown in Figure 1. Among them, electrical performance measurement and environmental test are allowed to be carried out in series. 10
6.1.3 Unpacking inspection
6.1.3.1 Inspection content
Product quality
Machine camera
GB/T15640—1995
Safety inspection
Environmental test
Unpacking and setting up
Expected risk
Figure 1 Flow chart of inspection procedure
Unpacking inspection includes: packaging quality, completeness, appearance, structure and function, see Table 7. The unqualified criterion shall be in accordance with the provisions of Table 7. 6.1.3.2 Inspection method
Use intuitive audio-visual method.
6.1.3.3 Qualification judgment
Unpacking inspection does not allow the presence of Class A defective products, Class B defective products cannot exceed 1 unit; Class C defective products cannot exceed 2 units. The definition of Class AB and Class C defective products shall be in accordance with Article 6.2.5. Table 7
Packaging and transportation
Defective content
a. The packaging box does not match the model of the whole machine
b. The number of samples in the box is insufficient
c. There is no product name, brand (or model), manufacturer, etc. on the surface of the packaging box
d. The packaging box is seriously damaged
e. The cushioning material in the box is missing or seriously damagedf. The certificate of conformity, manual, electrical schematic diagram and the random accessories specified in the manual do not match the machine
8. The spare parts and accessories specified in the manual are missingh. Foreign matter in the box
1. Inverted (the direction of the mark does not match the actual product)jNo manufacturer address in the manual (except for those already indicated on the casing or label)
kFactory date, quality mark missing or wrong
Unqualified category1 Finalization inspection
These rules apply to product design finalization inspection, production finalization inspection and other types of finalization inspection. 6.1.1 Inspection items, requirements and methods
The items, requirements, methods and sample quantity are shown in Table 6. Table 6
Unpacking inspection
Electrical performance measurement
Safety test
Environmental test
Reliability test
According to Article 5.3
According to Article 5.5
According to Article 5.6
According to Article 5.7
According to Article 5.8
According to Article 6.1.3
According to Article 5.5
According to Article 5.6
According to Article 5.7
According to Article 5.8
Quantity (sets)
Total number of samples
According to Scheme 1 of Table 5
(2)
For products with different types and functions added or reduced derived from products that have passed production finalization, it is allowed to simplify the test items with unchanged stress under the premise of ensuring quality.
Samples for final inspection shall be randomly selected from final batch products. The number of final batch products shall be determined by the manufacturer or the superior competent department. The number of samples shall meet the requirements of each test. 6.1.2 Inspection procedure
The inspection procedure is shown in Figure 1. Among them, electrical performance measurement and environmental test are allowed to be carried out in series. 10
6.1.3 Unpacking inspection
6.1.3.1 Inspection content
Product quality
Machine camera
GB/T15640—1995
Safety inspection
Environmental test
Unpacking and setting up
Expected risk
Figure 1 Flow chart of inspection procedure
Unpacking inspection includes: packaging quality, completeness, appearance, structure and function, see Table 7. The unqualified criterion shall be in accordance with the provisions of Table 7. 6.1.3.2 Inspection method
Use intuitive audio-visual method.
6.1.3.3 Qualification judgment
Unpacking inspection does not allow the presence of Class A defective products, Class B defective products cannot exceed 1 unit; Class C defective products cannot exceed 2 units. The definition of Class AB and Class C defective products shall be in accordance with Article 6.2.5. Table 7
Packaging and transportation
Defective content
a. The packaging box does not match the model of the whole machine
b. The number of samples in the box is insufficient
c. There is no product name, brand (or model), manufacturer, etc. on the surface of the packaging box
d. The packaging box is seriously damaged
e. The cushioning material in the box is missing or seriously damagedf. The certificate of conformity, manual, electrical schematic diagram and the random accessories specified in the manual do not match the machine
8. The spare parts and accessories specified in the manual are missingh. Foreign matter in the box
1. Inverted (the direction of the mark does not match the actual product)jNo manufacturer address in the manual (except for those already indicated on the casing or label)
kFactory date, quality mark missing or wrong
Unqualified category
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