Some standard content:
QB/T2417--1998
This standard is the first revision of ZBY58004-1989 "Tuner". Since the structure and manufacturing technology of tuners have not changed significantly, the contents of the original standard that have been proven to be suitable for the development of tuner products in my country and do not hinder production are retained during this revision. The main contents of this revision include:
Scope: The sound body of the tuner is clearly defined. - Reference standards: "QJ167 standard" is deleted, and two standards, \GB5935 and QB2100\, are added. - Product classification: "Twelve tubes" is changed to "turntable twelve-tone name thirteen tones". Technical requirements: "Superior products, first-class products" are changed to "high-end products, popular products". The clauses and contents of this chapter are deleted and adjusted, and the requirements for the materials of the main components are supplemented. Test method: "Use the air pressure of 195Pa (20mmHz0) ~ 295Pa (30mmHO) as the standard to measure each tone". Replace the content of 5.1.4 of the original standard. And add the test of porosity. 1. Inspection rules: The text has been revised.
1. Appendix A: Adjust the requirements for materials in A2 to the technical requirements chapter. From the date of implementation, this standard will also replace the professional standard ZBY58004-1989 issued by the former Ministry of Light Industry. Appendix A of this standard is the appendix of the standard. This standard is proposed by the Industry Management Department of the State Bureau of Light Industry. This standard is under the jurisdiction of the National Musical Instrument Standardization Center. The drafting units of this standard: Shanghai Guoguang Harmonica Factory, Beijing Musical Instrument Research Institute. The main drafters of this standard: Wang Mingjun, Zhou Weiyi, Wang Wei. 192
Light Industry Industry Standard of the People's Republic of China
Tuner
QB/T 2417-1998
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of tuners. This standard applies to tuners with copper reeds as sound bodies. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T2828--1987 Count sampling procedures and sampling tables for batch inspection (applicable to the inspection of continuous batches) GB/T2829--1987 Count sampling procedures and sampling tables for periodic inspection (applicable to the inspection of production process stability) GB/T3451--1982 Standard push-push tone frequency
GB5935--1986 Test method for porosity of metal coatings on light industrial products QB2100-1995 Method for marking the names of twelve equal temperament tones 3 Product classification
3.1 According to the specifications, shapes and uses of the products, they are divided into six specifications: four-tube, Spanish six-tube, Hawaiian six-tube, seven-tone single tube, twelve-tone single tube, turntable twelve-tone name thirteen tone. The applicable scope of various tuners is shown in Appendix A (Standard Appendix). 3.2 The note names of various specifications shall comply with the requirements of Table 1. Table 1 Note Names
Spanish Six-Tube
Hawaiian Six-Tube
Seven-Tone Single-Tube
Twelve-Tone Single-Tube
Turntable Twelve-Tone Names Thirteen-Tone
Note: Except for special specifications of users.
4 Technical Requirements
4.1 Temperament
Adopt twelve-tone equal temperament.
4.2 Standard Tone
a-440Hz, shall comply with the requirements of GB/T3451. 4.3 Tone Accuracy
Approved by the State Bureau of Light Industry on November 25, 1998
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Implemented on June 1, 1999
QB/T 2417-1998
The pitch deviation of a tone and a tone shall meet the requirements of Table 2. Table 2 Tone DeviationbzxZ.net
Tone Deviation
4.4 The interval relationship shall meet the requirements of Table 3. Specifications
Spanish six-pipe
Hawaiian six-pipe
Seven-tone single-pipe
Twelve-tone single-pipe
Turntable twelve-tone name thirteen-tone
Pure fifth
High-grade
Table 3 Interval requirements
Fourth and third harmony
Fourth and fifth harmony, pure octave
Fourth and fifth average harmony
Note: The interval of the turntable twelve-tone name thirteen-tone shall be based on the pitch meter. 4.5 Sound quality
Should meet the requirements of Table 4.
Table 4 Sound quality requirements
4.6 Appearance
4.6.1 Copper tube
High-quality products
Clear and loud, without hum, noise, or delay. Popular products
da Slightly wavy
gd Slightly wavy between fourths
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Slightly wavy
Popular products
Clear and loud, without obvious sand, creak, or noise, or delay. a) Tube body: It should be plated with nickel and chromium, with a bright surface, a firm plating layer, and no obvious scratches. The porosity of high-quality products should not be greater than 8, and the porosity of popular products should not be greater than 10.
b) Welding: The length should be even and straight, and the welding point should be smooth and firm. 4.6.2 The surface of the plastic tube
should be bright, without cracks or obvious shrinkage marks. 4.6.3 The sound hole plate
sound name markings should be clear, and the semicircles at both ends should be concentric and equal. 4.6.4 Assembly
The tube body and the sound hole plate should fit tightly, without obvious air leakage. 4.7 Materials of main components
4.7.1 Shell
Plastics that meet hygienic requirements or metal materials that meet sound quality requirements. 4.7.2 Sound hole plate
Musical instrument-specific copper material with a hardness not less than HV175 or other materials with the same performance. 4.7.3 Reed
Musical instrument-specific copper material with a hardness not less than HV185 or other materials with the same performance. 5 Test method
5.1 Tone
QB/T 2417—1998
5.1.1 Test instruments: pitch meter, vacuum pump, air storage box, pressure gauge, telephone, etc. 5.1.2 Test temperature: 15℃~30℃.
5.1.3 Test relative humidity: 40%~85%. 5.1.4 Test method: Take the air pressure of 195Pa(20mmH,0)~295Pa(30mmH,0) as the standard to measure each tone. 5.2 Interval relationship
Take the standard tone as the reference tone and perform sensory inspection according to the requirements of Table 3. 5.3 Tone quality
Play each tone and perform sensory inspection. It should meet the requirements of Table 4. 5.4 Appearance
Sensory inspection (except for porosity in 4.6.1a). 5.5 Porosity test
5.5.1 It should be carried out according to the method specified in GB5935. 5.5.2 The porosity is calculated according to the number of spots appearing on the surface of the coating per square centimeter. 5.5.3 The number of spots is calculated according to the size of their diameter. If the diameter is less than 1 mm, it is counted as a spot; if the diameter is between 1 mm and 3 mm, it is counted as three spots; if the diameter is between 3 mm and 5 mm, it is counted as ten spots; if the diameter is greater than 5 mm, it is unqualified. 6 Inspection rules
6.1 The product should be inspected and accepted by the purchasing department or entrusted to the quality management department of the manufacturer for inspection. Qualified products should be accompanied by product certificates before leaving the factory. 6.2 When there are special requirements for the product, the supply and demand parties should negotiate the specific inspection items according to the contract. 6.3 The inspection of products is divided into factory inspection and type inspection. 6.3.1 Factory inspection
6.3.1.1 The sampling plan for factory inspection shall comply with the provisions of GB/T2828 General Inspection Level I, Normal Inspection-Sub-sampling Plan. The order, non-conforming categories, items and acceptable quality level (AQL) of factory inspection shall comply with the provisions of Table 5. 6.3.1.2
Table 5 Provisions of factory inspection items
Non-conforming categories
Inspection items
4.6.1 (Except porosity test)
Test methods
Acceptable quality level (AQL)
6.3.1.3 If the factory inspection fails, the batch of products shall be returned to the manufacturer and sorted and adjusted according to the non-conforming items. The sorted and adjusted products can be submitted for inspection again. The resubmission of non-conforming batches shall be carried out in accordance with the requirements of 4.12b of GB/T2828. 6.3.2 Type inspection
6.3.2.1 Samples for type inspection shall be drawn from products currently in production that have passed factory inspection. 6.3.2.2 All samples drawn for type inspection shall be inspected according to factory inspection items. If there are unqualified products, they shall be replaced with qualified products, and the reasons shall be analyzed and written into the inspection report, but they shall not be used as the basis for type inspection results. 6.3.2.3 Type inspection is conducted once a year and should also be conducted in any of the following situations. a) Design change;
b) Key process change;
c) Major raw materials change;
QB/T 2417--1998
d) When the factory inspection result is significantly different from the last type inspection; e) When production is resumed after a stop of more than half a year;
) When the national quality blue supervision agency proposes a requirement for type inspection. 6.3.2.4 Type inspection shall be conducted in accordance with the provisions of GB/T2829, and the provisions of the single sampling plan for discrimination level shall be adopted. 6.3.2.5 The unqualified categories, items and unqualified quality level (RQL) of type inspection shall comply with the provisions of Table 6. Table 6 Provisions of type inspection items
Unqualified categories
Inspection items
6.3.2.6 If the type inspection is qualified, the batch of products shall be judged as qualified products. 6.3.2.7 Samples of type inspection shall not be shipped as qualified products. 7 Marking, packaging, transportation, storage
7.1 Marking
7.1.1 Each product shall be clearly marked with the name of the note. Test method
Rejection quality level (RQL)
7.1.2 The large and small packages shall have the name of the manufacturer, address, product name, trademark, specification, type of note, product standard number and other words or signs; the large package shall also have the date of manufacture or date of shipment, quantity and other words or signs. 7.2 Packaging
7.2.1 Small package
Seven-tone single tube and twelve-tone single tube are packed in one box respectively, and four tubes, Spanish six tubes, Hawaiian six tubes, and turntable twelve-tone name thirteen-tone are packed in one box each. Each small package shall be accompanied by a product certificate and product instructions. The product certificate shall indicate that the product complies with the provisions of this standard and be stamped by the inspector.
7.2.2 Large and medium packaging
The quantity in the packaging box and the materials used for the packaging box shall be determined by negotiation between the ordering department and the manufacturer. 7.3 Transportation
During transportation, the product shall not be exposed to rain or sunlight, and shall not be shipped together with toxic, harmful and corrosive goods. It shall be handled with care and shall not be pressed with heavy objects during loading and unloading.
7.4 Storage
7.4.1 This product shall not be stored in the same warehouse with toxic, harmful and corrosive items and shall not be pressed with heavy objects. 7.4.2 The product shall be placed in a room with a relative humidity not exceeding 85% and a temperature not exceeding 40℃. The warehouse shall be dry and ventilated, and the large packaging shall be at least 200mm away from the ground and walls.
7.5 If the product meets the above transportation and storage conditions and any quality problems caused by the manufacturer within one year are found, the manufacturer shall be responsible.
The scope of application of the A1 tuner is shown in Table A1. Specifications
Spanish six-pipe
Hawaiian six-pipe
Seven-tone single-pipe
Twelve-tone single-pipe
Turntable twelve-tone name thirteen-tone
QB/T2417—1998
Appendix A
(Standard Appendix)
Scope of application of tuner
Table A1 Scope of application of tuner
Scope of application
Applicable to violin, mandolin and fifth-degree musical instruments for tuning For tuning western ivory guitar
For tuning summer guitar
For tuning Chinese and western string instruments and drama singing, etc.197
Comparison table of national standards (GB) converted into light industry standards (QB) after rectificationAccording to the State Light Industry Bureau's document [1999] No. 112, "Notice on the release of light industry professional standards and the conversion of some national standards into light industry standards after rectification", the following national standards have been converted into new light industry standards. Original standard number
GB 5926—1986
GB 5935—1986
GB 5938-1986
GB 5944-1986
GB 12107—1989
Standard name
Test method for appearance quality of metal coatings and chemical treatment layers of light industrial productsTest method for porosity of metal coatings of light industrial productsTest method for corrosion resistance of metal coatings and chemical treatment layers of light industrial productsNeutral salt spray test (NSS) method
Evaluation of corrosion test results of metal coatings on light industrial productsKeyboard musical instrument key width size series
Transformed standard number
QB/T 3814--1999
QB/T 3823—1999
QB/T3826--1999
QB/T3832-1999
QB/T3912--19995 If the product meets the above transportation and storage conditions, the manufacturer shall be responsible for any quality problems caused by the manufacturer within one year.
A1 The applicable scope of the tuner is shown in Table A1. Specifications
Spanish six-pipe
Hawaiian six-pipe
Seven-tone single-pipe
Twelve-tone single-pipe
Turntable twelve-tone name thirteen-tone
QB/T2417—1998
Appendix A
(Standard Appendix)
Applicable scope of the tuner
Table A1 Applicable scope of the tuner
Applicable scope
Applicable to violin, mandolin and fifth-tone instruments for tuning For tuning western ivory guitar
For tuning summer guitar
For tuning Chinese and western string instruments and drama singing, etc.197
Comparison table of national standards (GB) converted into light industry standards (QB) after rectificationAccording to the State Light Industry Bureau's document [1999] No. 112, "Notice on the release of light industry professional standards and the conversion of some national standards into light industry standards after rectification", the following national standards have been converted into new light industry standards. Original standard number
GB 5926—1986
GB 5935—1986
GB 5938-1986
GB 5944-1986
GB 12107—1989
Standard name
Test method for appearance quality of metal coatings and chemical treatment layers of light industrial productsTest method for porosity of metal coatings of light industrial productsTest method for corrosion resistance of metal coatings and chemical treatment layers of light industrial productsNeutral salt spray test (NSS) method
Evaluation of corrosion test results of metal coatings on light industrial productsKeyboard musical instrument key width size series
Transformed standard number
QB/T 3814--1999
QB/T 3823—1999
QB/T3826--1999
QB/T3832-1999
QB/T3912--19995 If the product meets the above transportation and storage conditions, the manufacturer shall be responsible for any quality problems caused by the manufacturer within one year.
A1 The applicable scope of the tuner is shown in Table A1. Specifications
Spanish six-pipe
Hawaiian six-pipe
Seven-tone single-pipe
Twelve-tone single-pipe
Turntable twelve-tone name thirteen-tone
QB/T2417—1998
Appendix A
(Standard Appendix)
Applicable scope of the tuner
Table A1 Applicable scope of the tuner
Applicable scope
Applicable to violin, mandolin and fifth-tone instruments for tuning For tuning western ivory guitar
For tuning summer guitar
For tuning Chinese and western string instruments and drama singing, etc.197
Comparison table of national standards (GB) converted into light industry standards (QB) after rectificationAccording to the State Light Industry Bureau's document [1999] No. 112, "Notice on the release of light industry professional standards and the conversion of some national standards into light industry standards after rectification", the following national standards have been converted into new light industry standards. Original standard number
GB 5926—1986
GB 5935—1986
GB 5938-1986
GB 5944-1986
GB 12107—1989
Standard name
Test method for appearance quality of metal coatings and chemical treatment layers of light industrial productsTest method for porosity of metal coatings of light industrial productsTest method for corrosion resistance of metal coatings and chemical treatment layers of light industrial productsNeutral salt spray test (NSS) method
Evaluation of corrosion test results of metal coatings on light industrial productsKeyboard musical instrument key width size series
Transformed standard number
QB/T 3814--1999
QB/T 3823—1999
QB/T3826--1999
QB/T3832-1999
QB/T3912--1999
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