Some standard content:
Trial Verification Procedure for Basic Weights
JJG 99—1990
Trial Verification Procedure for Silicon Weights
Verificationatlon Realatinn nf WeightsJ.IG 9-1990
代%—181
This verification procedure was approved by the State Technical Supervision Commission on June 12, 1900, and will be implemented from January 1, 1991. Responsible unit: China Measurement Science Research Institute Drafting unit: China Measurement Science Research Institute
The drafting unit is responsible for the interpretation of the technical provisions. The main drafter of this regulation: Sun Powen (China Metrology Institute) Participating drafters: Biao Yukou (China Metrology Institute) Luo Caisheng (China Metrology Institute) Zhong Jianzeng (National Railway Measurement Station) Ning Guoquan (304 Institute of Aerospace Industry) 1404 Technical fee request (-) Classification of land codes (II) Nominal and group standards of station code quality (I) Determination of low code, correction value and tolerance (V) Structure, material, density and adjustment of magnetic field (V) Appearance of brick
(VI) Magnetic code marking
Verification conditions
(1) Verification equipment
(II) Verification environment
Verification items and verification methods
[) External bolt
(II) Elimination and storage of brick codes
(III) Quality verification of base codes
IV. Maintenance and verification cycle
Record 1 Use and maintenance of base codes
Appendix 4
Record 5
Appendix 6
Determination of volume of solid carbon steel|| tt||The structure of the code
The first-class code verification result certificate summary table
The second-class and all levels of the standard code verification result summary table Code verification certificate (back and format
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Trial verification procedures for brick codes
The six-system section is applicable to the verification of newly manufactured, used and processed codes, and is not applicable to the verification of "special codes manufactured according to the agreement",
Technical requirements
【一基础同分类
一法码 is divided into two categories according to whether it has a correction value. There are two types of correction values. The magnetic code is second grade; the basic code of the correction value is divided into 1, 2, 3, 4, 5, 5, 6, and 7 grades (1, FF, F, M, M, M, M, paper, 2 books are now stipulated, "when using the same code, the first grade code is effective! To the grade code to extract the converted quality disk note: the converted quality of the law is a real law code and the material density is H.Dg under the condition of 4 air separation of 0.2/m, the resulting air quality value is called the previous maximum value of the converted quality, the mother's girl agreed to the net match:
the conversion relationship between the converted quality value and the table air quality is: th- et.2
n +(vV)p1.2 -p.98s m
-(V-)m:
In the formula: 1. Special material density ():
Special standard density (0.12g/): Actual volume of the material (rn);
.99985
Material particle size system: The required pressure when calculating (en) (2) Nominal position and combination of the measured quantities
3 The standard value of the measured quantity should usually be as follows: \kg
W: -
-1. 2, 5:
Integer from -3 to -8, among which -8 is used 5×10kg. 4. The combination of the code
code combination formula is combined in any of the following ways: (1, 2.2, 5) × 10 (preferred): (1.1, 2.5) × 10\k;
(1, 1. 1.2. 5: X10nkg:
(1., 2, 2, 5)×10\k
(II) Silicon code calibration accuracy, stop value and table error 5 Silicon code calibration accuracy
5.1 The accuracy of silicon code is shown in Table 1
5.2 The basic code of each level adopts the limited error range of each error source to control and measure its rhythm: 6 brick code quality and correction value
, 1 winter and other quality or correction values must be frequently determined and verified. 6.2 The code of each level does not give the slow compensation: but the first determination or adjustment after the calibration of the defective quality repair work cannot be used for the broken code quality disk. The tolerances of the quality of the goods are shown in Table 1. The second-grade legal code of the new product shall be produced according to the tolerances of the 3rd grade basic code in Table 2. 7.2 The tolerances of various brick codes are shown in Table 2. Table of light difference of various brick codes "Accurate accuracy" is called Tongzuo. FoSrne
Positive quantity difference
↑±enki
Beginning of fine membrane
±puc)
1 5-10
grant slip correction
three kinds of table
actual calculation
equal to the moving weight
fee machine fixed value
half
weighing quantity
Sixilke
SOKE-ng
Table 2, the quality of each crack delay code is filled to the table
3 × t
.1.5. 1y
7.5×m5.5/10j7.5x
.0.0.5
u.10x1 0.610
n.m020.c05
0.002D.105
n.m7:0.005
Niu:! Maximum safety and longevity selection band ten.
3 ×162
1.5 × Loe
L.5 - ure
5, total
2.5×In.$+
5× 10:
2 5×1o
2.5 x Lo2
7./ts t*
:7.5 × 10
3 × 102
3× 10
二5, 5.7 level random identification, small standard mass is 25kg, the hole filling is allowed to continue for a month, not allowed to be half 6
+×1u*
5 × 103
(piece) of the station structure, material particles, radiation intensity and the shrinkage of the course 8 bricks
8.1 For each grade, 1 and 2, the variable gram group compensation code must be a solid body of a whole piece of material, and the other codes can be adjusted later:
8.2 The magnetic or gram component code of each grade can be in the form of sheets or lines, and its shape should be easy to obtain. 8.2, a piece of 1 name code or gram component code must be multi-faceted, and in order to obtain the square, one side of the code should be expanded to be parallel to the soil of the single code and have an angle. The height of the folded edge shall not be less than 1.5mm and shall not be greater than 2.5:11: The difference between the edge of the sheet and its nominal value is: the two angles correspond to 1, 1, H], MOrg:
force shape corresponds to 12, 20, 200m%
five-valent shape for 5, 50, 500ug,
8.2.2 The folded code of the microgram code must be a piece of wire or ten pieces connected together to form a folded shape. For the convenience of light reflection, one of the line segments has a 30-45 degree upward bend at the end of the folded line. The relationship between the line segments of the folded line of the microgram code and its nominal value is as follows: the number of line segments corresponds to 1, 10, 100mg; the number of line segments corresponds to 2, 20, 24, 100mg; the number of line segments corresponds to 5, 50, 500mg. B.2.3 For linear code, the nominal value of the two codes of the same code group can be bent into a small one on each of them,
8.1.4 The microgram code of the microgram group is relatively thin and not suitable for being made into a regular shape. It can be processed in the same way as in 8.2.2 and 8.2.3, and its corresponding shape is shown in the calibration certificate. 8.3 mg group and above 1 to 3 grade magnetic codes, whether or not there is a mandatory provision, they are also called single codes made of straight mesh body 8.42% kg and above containing 20kg, the same below), can be made into a shape with a low center of gravity, so that it is easy to stack, and it can be fast to slide and lift.
B.5 The base weight mounted on the measuring instrument can adopt different structural forms according to the requirements of the instrument. 8.65-7 The structural form of the weight above 50kg is shown in Appendix 3. V code material
9.1 The material of the back weight
9.1.1 The base weight must be made of gold or alloy with relatively stable performance. Under the condition of the use of the stop belt, the change result of the code quality function during the entire verification period should not exceed the tolerance of the pressure pad relative to its accuracy level, for the grade code) or the verification accuracy (for the low-grade code)
9.1.2 Manufacturing of various grades of base weights.The metal alloys used to receive the magnetic code of grades 1 to 4 must be non-magnetic. Grade 6 codes and grade 1 and 2 base codes can be made of austenitic stainless steel. Grade 3 and 4 base codes can be made of yellow steel, 80-20 chromium alloys and copper. Grade 3 to 5 effective silicon codes can also be made of aluminum. 5-carbon waste less than 10kg can be made of brass or materials inferior to brass. Grade 5 to 6 base codes above 501g and grade 6 to 7 codes above 100g can be made of 1-tungsten iron. 6 Natural bricks can also be made of American copper:
Material density of manufacturing method bricks
10.1 The material density of each grade is sufficient, and appropriate dispersion is allowed. There are no restrictions on natural bricks, but the material density of the newly produced grade 2 bricks with a weight of less than 1g and a weight of less than 50g must be measured. The measurement station is not lower than 14ik
.
Matching code curing effect
Table 3 Volume and density training refined beans table
-%, grade
Original volume m
Second grade, over 2 years old
Body tcn;
mn rr:
10.2 The actual material brand and corresponding dosage unit value of each grade of newly produced plain woven brick codes should be given. 19.3 The volume of the first-class standard bricks of 10g or less in use shall be calculated based on the average volume of the bricks of 500g to 20g in this group. The volume of the second-class standard bricks of 0g or less in use shall be calculated based on the average value of the actual measured volume of the bricks of 500g to 100% in this group:
The material density of the non-standard bricks of the 4th and 5th grades shall be as follows: The material density of the bricks of the 1st and 2nd grades of the standard bricks of the 1st and 2nd grades shall be measured, and the density shall conform to the provisions of Table 3. The material density of the bricks of the 3rd and 5th grades shall be the average value of the measured material given by the manufacturer, with the accuracy controlled within ±0.04g
For bricks of 10,53 or less in use, the following values are generally used to estimate the material density of the carbon bricks: : Copper alloy: 8.4g/u: Stainless steel: 7.55g/cm2; Cast iron: 7.8g/am: Cast iron: 7.2g/cc; Pin: 2.7g/cm211 Broken materials
3 to 4 grade code, must be practical and good material adjustment, 5 to 7 grade code can be used for lead adjustment: 12 Code adjustment and sealing
12.1 The adjustment of the new code above 50 kg is not allowed to be located on the upper surface, the volume of the adjustment space of the 3 to 7 grade code below 50 kg shall not be greater than 2/10 of the total volume of the code, the volume of the adjustment rubber of the 4 to 6 grade code above kg shall not be greater than 5/100 of the total volume of the code, and the adjustment cavity of the code above 500 kg shall not exceed 3/1 of the total volume (at the first calibration, at least 1/100 of the total volume of the code shall be left) 12.2 The single code must be sealed after adjustment. 【V】Appearance quality of the code
13 The surface of the code should be smooth and clean, without any cracks, creases, or other defects. The surface should be evenly glossy and even without any cracks or creases. 1410
14 The surface of the code should be plated or coated to protect the surface of the code from being separated from the ground. This layer or coating must be able to withstand the impact and abrasion of the atmosphere, and the surface color should be uniform without any defects such as delamination, blistering, acid marks, burn marks, wrinkles, etc.
(Cloud) The mark of the code
15 The mark on the code
15.11tmg and above must use Arabic numerals to mark its nominal mass, J00mg and its modified group and 50 grams or more, the following grams must be marked with a unified sequence of land inverse device numbers: 1, 2, general carbon and other natural milligram groups of code or sound solution: ring? Do not mark its nominal value, except for this, all other frequency ends are marked with Arabic numerals. 15.2 The method of marking the nominal mass value of the code with an Arabic numeral: the unit of the gram group code is gram, the unit of the gram group code is gram, the unit of the kilogram group code and above is kilogram, and the unit of the code of 1 and above can be ton. For the 1/2 group code and the 1/2 group code, there is no special regulation on whether the Arabic numerals have a unit symbol after the Arabic numerals: for the kilogram group and above, the Arabic numerals can be followed by a sign "x" or "\". 15.3 For all codes with the same nominal value in the same group, except for the 1/2 group code, the third one should be the same. The code 1 is distinguished by a dot (“”) and no dot [\\) or a single dot (“” and double dot “”, “): When the number of alternate nominal weights is more than 3, all the weights in the group should be marked with the Arabic numeral
15.4 Required 1. The following markings should be on the code plate:
a. Magnetic code grade (main title):
b. Quality range:
c. Material brand and protective layer type:
external;
r. Three:
Two calibration items
(I) Calibration options
16 Talk about the calibration of the calibration code, use the commercial base and standard base that has been measured for many years to carry out combined calibration or one-to-one calibration. In order to balance the small difference and the large internal graduation value, the corresponding standard code with known quality should be matched. During the calibration process, the comprehensive limit recognition of all known reference and standard codes used should be achieved. For the standard code, it should not be greater than half of the accuracy of the code being tested, for the general magnetic code, it should not be greater than one-third of the tolerance of the code being tested, and for the grade code, it should not be greater than half of the accuracy or tolerance of the code being tested.
(II) 17.1 The calibration room should be as far away from the room as possible from the vibration and airflow. 17.2 The calibration room should be kept in good condition, and its flow fluctuation should not exceed 0.5% every four hours. For the calibration room of the first and third grades, its humidity fluctuation should not exceed [t: HII] every four hours. 17.3 For the indoor measurement of air and humidity, a first-class standard barometer with a minimum graduation of 1.1t, a second-class standard barometer with an accuracy of P, a ventilation intercept meter with a relative accuracy of 1%, or other meters, barometers, and hygrometers with a relative accuracy of 1% approved by differential analysis should be installed in the calibration room. The relative humidity of the air in the test room should be less than 10%. 17.4 The large scale and base codes in the test room should be protected from direct exposure to sunlight. Magnetic codes below level 184 can be tested at room temperature with a relative humidity of less than 80%. Three test items and test methods: Appearance inspection. 19 Check by visual inspection whether the technical indicators of the code meet the requirements of Articles 13 and 15 of this Regulation. (II) Cleaning and maintenance of the scale. 20 Clean the scale in accordance with the provisions of the Appendix, and then adjust the room. The temperature of the scale room should be consistent with that of the room for levels 1 to 4. The storage time of the first-class, 1st-class, and 2nd-class scales in the test room shall not be less than 24 hours (small attachment), and the storage time of the second-class, 3rd-class, and 4th-class scales shall not be less than 12 hours. The large scale scales can be tested after cleaning for ten hours. (III) Quality test of the code
and the code of 1 and 2 are measured by double substitution method and conversion method. The quality of the code of other grades can be measured by substitution method, exchange method or continuous substitution method according to their specific conditions. The quality of the code below grade 5 can also be measured by proportional weighing method. The reading of the balance position of the balance is taken as the balance position of the balance. For the dynamic balance, the total reading of four consecutive rotations is used. When calculating the balance, the reading of the four or the previous rotation point is used to calculate the balance according to formula (4) or (5). 1-4-3/+3:-4
1. 41 252.+ /
22The specific procedure is as follows:
Double-time weight reduction method see Table 4, double-time exchange weighing method see Table 5, single-time substitution weighing method see Table 6, single-time exchange weighing method see Table 7, and continuous substitution method see Table 8.
Table definition:
Balanced object:
Total weight:
Standard energy:
Vertical mass of A:
Point mass of A Correction value;
B's true mass correction value:
A's volume:
's speed;
Verify the air density in the room;
Determine the scale value of the balance with a standard small base code for air quality: the scale value of the balance
In the second part of the weighing, in order to make the person balanced, add a standard small broken point of air on the lighter half of the filter
Inflate the bottom!
In the quality research
The difference between one m Cheng and one g:
The difference minus one,
The whole seat is 1 except for the ancestral danger
Warm light seat
Reverse proof degree
Air energy degree
R number:
Nominalization:!
body:《cn）
balanced cattle bone mass inefficiency
2-(V, -rgler:
[K,]=[R.-+^-
marked ring deviation: (
staining 4 double replacement blood weighing method
qualified proof of internal exemption of majority
two-time
double replacement incubation method
marked method code D
village material:
you position nig!
2,t-[KJ)
甲与检验置
Jg,+If
a- Yn)e
Imraw?
Guardian
"Balance position error
Swimming number:
Nominal:
Double weighing method
Accurate allow
Grid L position:
1 E;t-[Ke
Handler main part
You! en
. -(V, -Vr'pw.--[(Ln,-.m,3-lu, - iw..3= m, -tre?
[R.]--K.l+--
Supplementary:
+ m,- 314--.h.
I Va V.? -
The exchange of heat makes the large-scale collection add to the actual guide in the standard coordinate small body buy the first place in the quantity, the enterprise uses the public's single capital to send the quality cloth to calculate the too Cheng code together exchange
read the code exchange piece, for the letter balance;. In the teaching of the light half of the second rolling special small law code into the air benefit, table 6 single generation quantity Zhi
match Ma A
zi(-15.)
balance has trial reading effect
service number:
you call position:
t V,-V-tid+
[A.. =K}'+
A's five qualities:
's or calculated value
forbidden construction:lark)
balanced value bone
tow'cn')
nail quality, deep training small taste (
's folding thing pressure world sample positive false:
determination of artificial sub-certification river standard difficult small brick two shadow oxygen can, all "time resistance to aging. For most of the half and half balance!: on the stem light no 7 on the standard mother's grass period; blood fixed re-gas egg degree increase for ten fixed standard wear airtightness - [, 2's sound display -a, m1.2.a/m
m: cloud mi's
pressure he number inside the exchange product
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