Some standard content:
ICS 87. 200.20
Classification number: Y58
Reservation number: 125CB-2003
Light Industry Standard of the People's Republic of China
OR/T1477—2003
Mountie QB/T J477—1992
Electronic Piano
Electronic piano
2003-09-13Released
National Development and Reform Commission of the People's Republic of China2003-10-01Implementation
This standard amends QD/T1477-19926 electronic piano. The main contents of this revision include:
In the model song, the technical characteristics of electric piano are expressed; in order to standardize electromagnetic inspection, the use of relevant standards is added; in the product classification, the content related to product characteristics is added, and the strength, function, system failure or chaos are standardized. The requirements of the absorption of the introduction of the source of a certain small key, the function of the right, the release system is recognized and the standard is the non-magnetic research and other items: ... increase, the requirements of the black chain,
zhou sangcai felt the medical requirements of the school hope to be negative, the test method of the test! The inspection, type inspection, and other items are respectively made on the specifications, thanks for the whole. This standard is the ten national light 1 industry color will be issued:
International non-issued by the National Leyi Chemical Center
This standard is medical 1 Huaxin Electronic Appliance Factory City from the list, Lehuoyouyi optical six! Teaching Jin drafting, this standard is mainly promoted by scholars: Lin Zhi, Er Qiang, Ke Jiang This standard is the white H from the generation of the original trend of the industry released by the control industry QB1477-1992 "Electronic Network Car 3. This standard was revised and issued in [992], and this time is the first revision. 1 Scope
Electronic steel
QB/T 1477-2003
This standard specifies the requirements, classification, test methods, inspection rules and specifications of electronic products, including safety, reliability and storage. This standard applies to electronic pianos produced by general technology. 2 Normative references
A document that is referenced by a standard shall not be subject to the provisions of this standard. For any referenced document, its subsequent amendments (including errata) or revisions are not applicable to this standard, however, the latest version of this document may be used to meet the requirements of the technical standards. For any referenced document, its latest version shall apply to this standard. GB2828-1987 Batch inspection and sampling procedure and sample collection table (for inspection of batches) GB/2829-1987 Batch inspection and sampling procedure and sample collection table (for inspection of batches during production) D345-1982 Standard for frequency converters GB8898-2001 Safety requirements for audio, video and similar electronic equipment GB/T 101S9-2002 GO/T 12105-1998 GH/T 12106-1989 Technical conditions for electronic converters Environmental test requirements and test methods for electronic converters GB 13837—1997
Audio and video transmission equipment must have a large line interference characteristic limit and measurement method G17625.1—1998
QB/T3912-1999
Low-frequency electrical appliances and electrical equipment small current limit (no current per cabinet can be 10A) avoidance instrument speed width system
SJT 3265—1989
Electroacoustic performance test room method
3 Requirements
3.1 Product classification
3.1.1 According to the type of product, it can be divided into solid type, horizontal type, electric efficiency solid type, arch type or other forms. 3.1.2 According to the use and performance of the product, it can be divided into high-end products, intermediate products and popular products, which should meet the requirements of Table 1. Table 1 The same product numbers are used to verify the design. Please note that the design and results are the same and the effectiveness is unchanged. MIDI IN/OUT 3.3.3 The product should have a jack with a muted tone and a mute switch or a mute function. 3.2 Environmental conditions for use The product should be able to work normally under the conditions of 5~40°C and a humidity of 45%~85%: QB/T1477-2003 3.3 Acoustic quality 3.3.1 Temperament system The equal temperament should be adopted. 3.3.2 Standard sound quality - red a tone 440Hz, which should meet the requirements of GB/T3451-1982. 8.3.3 Tone The product should have a typical steel tone, and the tone can be expanded by other means. 3.3. 4 Tone quality
Full tone or island tone, continuous cutting, pure, no sound. 3.3.5 Quality bzxz.net
-KAoNhiKAca
The range of sound is uniform, can express different strong and weak sounds, with clear layers, and the sound adjustment should be set. 3.3.6 Full range accuracy
The pitch error of two adjacent keys is not more than 3 minutes, and the full tone pitch error meets the requirements of Table 2 and Table 2
Full tone accuracy
3.3.T Tone stability
Two-level products
should meet the requirements of GB/T2105-1998-4.1.5. 3.4 Performance
3.4.1 Keyboard
3.4.1. 1
Chain width should meet the requirements of QB/3913-1999. Medium quality
3.4.1.2 The depth of the white bottom machine should meet the requirements of 5.2.1 of GR/T10159·202. The surface of the white compensation should be 630mm~B30mm (convenient type is not subject to this limit: 3.4.1.3
The black height should meet the requirements of 0B/T10159-2007-5.4.4. 3. 4.1.4
The movement of the key should be smooth and not be distorted. 3.4.1.5
The mid-position is the production position
The pressure of the key is 0.56N~E.37, and the pressure of the key is not too large. 3.4.1.6
0.14N: The pressure is 0.12N~0.98.
When pressing and holding the key, there should be no mechanical noise or electrical noise that affects the movement. When the key is released, it should be reset quickly without any accident. 3. 4.1.7
3.4.1.8 The maximum error of the relative height of the two keys shall comply with the provisions of Table 3. Table 3
Adjacent heights of the keys
High and medium grades
Grade grades
All zinc plate white chain without blood production degree
3.4.1.9 The key surface is flat, bright, straight, rubbed, cracked, sharp, and sharp: 3.4.1.10 The key is set for 200,000 times, which should meet the requirements of the clearance of the chain in 3.4.1.1, and should also meet the requirements of 3.4.1.2 and 3.4.1.4~3.4.1.8,
3.4. 2 Pedal
3.4.2.1 The movement should be smooth, flexible, and moderate, and there should be no noise or hum. 3.4.2.2 Low-pitched pedal: The sound pressure level should be reduced by 6JB~10 at the same speed. 3.4.2.3 The sustain and stop performance of the sustain pedal should be acceptable. 2
3.5 Electroacoustic performance
QE/T1477—2003
3.5.1 The maximum sound level of the full-scale single-tone, the maximum internal pressure level of the chord sound, the maximum sound pressure level of the sound without the initial sound, the sound output level, and the total sound spectrum of the emission system should comply with the provisions of Table 4. Table 4
The maximum production level of full keyboard health music
and human level
No item is the maximum human level dB
Level dB(A)
The various changes in the recorded voice of the practicing school K
Full key pad should be uniform, especially the low-key position, the sound pressure level change between light and heavy playing should not be less than: 3.5.3
The sustain time should comply with the provisions of the table ≤.
Delay time
3.6 Safety requirements
From the intermediate level
center 5~1
operation and combat
according to the enterprise standard, the safety standard, overheat protection, and the triggering components shall comply with the provisions of Chapter 5, Chapter 7, and Chapter 9 of GB8898-2001 respectively: Note: The source of interference shall comply with the provisions of 4.2 of GB13837-1997. 3.6.2:
3.6.3 The power of the strong power shall comply with the provisions of 1.6 of n13837-199, and the current limit of 3.6.4 shall comply with GB 17625.1-1998 City 7.4 regulations. 3.7 Power adaptability
In the frequency of 50 + 1> gate z, the self-voltage is (220-1%V) within the range of normal "3.8 Appearance and structure
Should comply with the requirements of 4.8 in GB gate 121051998. 1.9 Environmental test
After the air grip environmental test and vibration test, the female wide Xie system shall comply with the requirements of this standard: 4 Test method
4. Test environment
In addition to the environmental test In addition to the test, other tests shall comply with the provisions of Section 4 of SJ3265-198. 4.2 Acoustic quality
4.2.1 Standard sound
Connect the Sigma source, and after 1 minute of power-on: measure the frequency of the standard instrument in accordance with the requirements of GBT345-1982. 4.2.2 Tone, sound quality, volume
Check.
QB/T1477-2003
4. 2.3 Full range pitch error
KAoNhiKAca
Turn on the power supply, and after 10 minutes, use a pitch meter or frequency meter that meets the requirements of GB/T3451-1982 to check. 4.2.4 Pitch stability
After the test in 4.2.3, make the test subject energized for 2 minutes, and then test it again with the same method. Compare the difference between the two measured pitches before and after.
4. 3 Performance
4.3.1 Width of cage
The length of the chain should not exceed 0.02mm. The length of the chain should be measured with a small lifting tool and the clearance of the chain should not exceed 0.01mm.
4.3.2 Depth of key sinking
Place a magnet with a diameter of 18mm and a weight of 200 at the front end of the chain, and place the center of force 23mm away from the front end of the chain to make the chain sink to the bottom. If the value is not more than 0.02mm, only check it at 2mm from the front end of the key. 4.3.3 Height of chain surface from the ground
The length of the chain should be checked with a small lifting tool and the clearance of the chain should not exceed 0.01mm.
4.3.4 Black key sensitivity
Use a long H hole not greater than 0.2mm to test the key movement sensitivity
4.3.5 Equal key movement sensitivity test
4.3.6 Zero key load
Place a brick with a diameter of 18mm on the front surface of the white chain at 1mm, 18mm from the front surface of the black chain (based on the center of the bottom of the brick), and gradually increase the carbon brick plate to make the key fall down to the point of being sluggish. The code reading at this time is the chain descent load: then gradually reduce the delay code mass until the key returns to its original height, and the speed at which it is delayed is measured. 4.3.7 Check the movement noise of each key 4.3.B Check the height difference of the key surface with a small tolerance greater than 0.02 length. 4.3.9 Check the key surface. 4.3.10 Check the chain tension with a speed of 1.96N~2.94, 2 times/-3 times/5, and play 200,000 times in reverse 4.3.11 Check the pedal 3.4.2.2, and check other items. 4.4 Electroacoustic performance
4.4.1 The maximum sound pressure level of single-chain music of full keyboard shall be checked by the method specified in 5J/T326S-19896.5.2: 4.4.2 The maximum sound pressure level of chord music
Under the special conditions specified, the maximum sound pressure level of each key of C, E, G and small letters, 8 keys shall be measured at the same time, and the maximum sound pressure level of optical distortion music shall be measured at the same time, and monitored at the same time. In the absence of loss of original sound, the maximum sound level of music shall be checked by the method specified in SJT3265-19896.7. 4
4.4.5 Total harmonic distortion of the acoustic system
Inspect according to the method specified in 6.15 of SJ/T3265-1989. 4.4.6 Check the sound pressure level changes of various keyboard sounds.
4.4.7 Check the sound pressure level changes of the intensity
4.4.8 Sound time
QB/T14772003
After pressing the sustain pedal, play the key (press the piano chain continuously), and measure the duration of the sound pressure gradually decreasing from the highest level:
4.5 Safety requirements
4.5.1 Safety requirements, overheating and electric shock prevention, according to the methods specified in Chapter 5, Chapter 7, and Chapter 9 of GB8898-2-1. 4.5.2 Injection power withstand voltage, according to the method specified in Chapter 5.2 of GR1.7837-1997. 4.5.3 Surge power
According to the method specified in GB13837-1997. 4.5.4 Harmonic current limit value (according to the requirements of A, Appendix B and Appendix C in B17625.1-1998) 4. Daily power adaptability (50+1>TIz, 198 and 242V, spring type test. 4. External specifications and structure (official name). 4.8 Environmental test (except for the impact drop test, other items shall be carried out according to the method specified in GB/T1210%-1989). 5 Inspection criteria 5.1 Products shall be inspected by the purchasing department or commissioned by the original manufacturer. Quality management department inspection: qualified products (with production certificate attached) and qualified factories 5.2 When there are special requirements for products. The supply and demand parties shall come up with specific inspection items according to the contract. 5.3 Product inspection is divided into factory inspection and type inspection: 5.3.1 Factory inspection
5.3.1.1 The oil sample plan for factory inspection shall comply with the provisions of OR/T2828-1987 on the normal inspection plan. 5.3.1.2 Items of quarantine inspection. If the road category, inspection level, AQ. are not in accordance with the provisions of Table 6, 5.3.2 Type inspection
5.3.2, 1 Product Type inspection is conducted annually. It should also be conducted when the structure is changed, when major raw materials are manufactured, or when production is resumed for more than three months.
5.3.2.2 The samples for type inspection are randomly selected from the products currently produced and have passed the inspection. 5.3.2.3 The sampling plan for type inspection shall comply with the level 1 sampling plan specified in GB/T2829-1987. The judgment number for type A defects is 0, 1), the RQT. value is 3B, the judgment number for type C defects is (1.2), and the RQL value is 65.5.3.2.4 The remaining samples taken for type inspection: should First, the factory inspection is carried out. If the product fails to meet the standards, it shall be replaced by a qualified product. The reasons shall be analyzed at the same time, but it shall not be the basis for the type inspection results. 5.3.2.5 Type inspection is carried out according to all technical indicators specified in this standard. 5.3.3.6 Type inspection acceptance price, the products produced in the period of production are qualified products. 5.3.2. Products that have passed the factory inspection shall not be exported as qualified products! Qn/T1477—2003
Small joint expansion test
Inspection items
3,61 Safety mark, overheating, power shortage prevention 3.2 Non-standard
.a.1 3.6 Full height error 3.3.7 Acoustic instability 3.4.1.5 Full range of motion 3.4.1.7 Needle movement noise 3.4.2 Pedal 3.4.1.1 Key size 3.4.1.2 Adding a piece from the key 3.4.1.4 Period chain test 3.4.1.6 Zero chain blood 3.4.1.8 6.1 The product is attached with the product certificate and instruction manual when it leaves the factory. The standard terminal number used in this product shall be marked on the product, and the inspector shall stamp it.
6.2 The product shall be marked with the manufacturer's name, trademark, model, power supply, rated power supply voltage range, power supply rate, side bracket and other symbols.
6.3 The product packaging shall be marked with the product name, model, manufacturer's name, place of origin, trade name, publicity, storage and export! H period or H period of production and words or marks such as "handle with care", "moisture-proof", "anti-oh", "not suitable for use", "anti-irritation", etc. If required by national laws and regulations, there should be a certification mark.
6.4 Product packaging should be handled with care during transportation, and should not be turned or placed with heavy objects. Day.The product should be stored at a temperature of 0-40℃, at least 200mm away from heat sources and at least 300 meters away from the environment.
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