JJF 1134-2005 Calibration specification for special working force measuring machines JJF1134-2005 Standard download decompression password: www.bzxz.net
This specification is applicable to the force calibration of special working force measuring machines such as compression testers and particle strength testers of various specifications and levels. Force calibration of other special force measuring devices can refer to this specification.

National Metrology Technical Specification of the People's Republic of China JJF1134—2005
Calibration Specification for Working Force Measuring Machines for Special Purpmses2005-04-28 Issued
Implemented on 2005-07-28
Issued by the General Administration of Quality Supervision, Inspection and Quarantine JJF 134—2005
Calibration Specification for Working Force Measuring Machines for Special Purposes J.JF 1134—2005
Replaces JJG 609—1989
JJG333—1996
JJG787—1992
This specification was approved by the General Administration of Quality Supervision, Inspection and Epidemic Prevention on April 28, 2005 and came into force on July 28, 2005.
Responsible unit:
Drafting unit:
National Technical Committee on Force and Hardness Metrology
Shanghai Institute of Metrology and Testing Technology
China Institute of Measurement and Science
This specification is interpreted by the National Technical Committee on Force and Hardness Metrology. The main drafters of this specification are:Www.bzxZ.net
Zhang Guiren
Hua Linhu
Zhang Zhimin
Participating drafter!
JJF 1134—2005
(Shanghai Institute of Metrology and Testing Technology) (Shanghai Institute of Metrology and Testing Technology) (China Institute of Metrology)
(Haishi Institute of Metrology and Testing Technology)
References
4 Measuring characteristics
4.1 Basic requirements
4.2 Safety protection device
Accuracy level and technical indicators of dynamometer
4.4 Additional functions
5 Modification conditions
5.1 Environmental conditions
Small standard instrument
6 Calibration items Calibration method
Calibration items
Calibration method
Additional functions
7 Expression of calibration results
8 Time interval for recalibration
JJF J134—20
Uncertainty evaluation method for calibration results of working dynamometers Calibration report format!
Calibration report format 2
Calibration record of special working dynamometers
1 Scope
JJF 134—2005
Standard specification for special working dynamometers
This specification is applicable to the force value calibration of various specifications and levels of compression test rods, particle strength testers and other special working dynamometers (hereinafter referred to as dynamometers). The force value calibration of other special force equipment shall refer to this specification. 2 References
JJF1059—1999 Evaluation and expression of measurement uncertainty JF1094—2002 Measurement instrument characteristics. When using this specification, please pay attention to the use of the current valid versions of the above referenced documents. 3 Overview
Dynamometers are widely used in the calibration of tension, positive force or related parameters of products, components and their manufacturing and assembly processes. The dynamometer is mainly composed of a force driving device and a force indicating device. When the dynamometer is working, the force driving device applies the test force to the sample, and the force indicator indicates the measured value or related measurement results. 4 Metrological characteristics
4. Basic requirements
) The indicator device of the dynamometer should use the legal measurement unit with the same sensitivity as the measured unit as the basic measurement unit.
The relevant measurement results indicated by the indicator device should be verified according to the technical description, calculation formula and related required numbers and coefficients provided in the manual.
Zero-point adjustment function of the center indicator device
1) The zero-point adjustment range of the force value should be greater than the maximum zero-point change caused by the weight of the belt attachment, different working positions and directions (generally considering the vertical and horizontal directions). 2) After entering the test state or the measured value is greater than the lower limit of measurement, the zero point adjustment function should be controlled. If the test part has multiple ranges, the zero point of each range switch should be consistent, and its change should not exceed 1/2 of the maximum allowable error of the small range.
D) The measured value displayed by the digital display can be divided into positive and negative numbers. 4.2 Safety protection device
4! The bottom of the dynamometer has a cross-protection structure and (or) facilities for small specimens to break, eject, break, etc.
B) When the loading system adopts hydraulic or mechanical driving mode, it has the following safety protection functions: 1) When the test force reaches 102%~110% of the new set value, the overload protection device should immediately stop the force application. 2) When the power-driven bearing device moves to the extreme position, the limit device should immediately stop moving. JJF1134—20N05
When the conditions for talking are met, the actual machine store automatically stops or ends the speed test, 13 measurement machine accuracy level technical standards
) to quote the error level to determine the time meter is characteristic death table 1. Table 1
Dynamometer type and technical index ()
Line type (FS)
Technical
(% scale)
0.05.20 0.20
-0.1 ±0.15
-0.2 ±0.30
=0.J ± u.45= 0.60
The force according to the test is:
f, zero error:
Relative error:
Reference:
Reference (according to the test results): 0.5
#0.25 0.50
±0.25 10.5
±0.50 +1.0
Note 1: The center point of the indication is used as a reference for the grading of the force. Unless the electric power is used for the level of effectiveness, the aging of the power is checked and the identification is complete. 2: The error level is not specified or the error level is not specified. Table 2 lists the relative resolution of the force machine level and technical specifications:
al ssj
and technical specifications:
- Relative resolution of the indication product:
- 4 period error;
9 indication value tree:
t- Minimum repeatability and error;
!- When the material is large, the user needs to give the root number of the membrane product (the user needs to give the root number). 2.0
Note 1: It refers to the following: when the force is set, the comprehensive points should be paid attention to and the design should be determined.
In addition: Commonly used
4.4 Additional kinetic energy
J.IF 1134—2005
A) When the dynamometer has additional functions such as peak hold, display lock, alarm setting, control, drawing, input ratio, printing and communication, its working performance should be able to meet the requirements of the manual and relevant test method standards. B) The calibration of other performance indicators of the dynamometer such as time, length, speed, etc. should be carried out according to the requirements of the manual and relevant technical standards.
Calibration conditions
5.1 Environmental conditions
A) Temperature: (10~35)%, temperature fluctuation should not exceed 20% during calibration. E) Humidity: 80℃,
C) Other conditions; During calibration, there should be no external defects, vibration, electromagnetic interference or other interference that may affect the calibration results.
5.2 Standards
5.2.1 According to the specifications and structural form of the force measuring machine, select the corresponding standard force measuring bricks, standard force measuring machine rods and standard force measuring instruments as the force standards for calibrating the force measuring machine. 5.2.2
The characteristics of the force standard used for calibrating the dynamometer are shown in Table 3. Table 3 Technical indicators of force standard
Dynamometer level
Confirmation method
Standard calibration
Standard force measuring rod
Standard source force instrument
Standard force measuring lever
Standard force measuring lever
Calibration items and calibration methods
Calibration items
1 Value error!
=1/3Dynamometer reference
Error 1
1/1Relative error of dynamometer information!
More than 1/31Dynamometer relative
Error!
Technical standard of standard instrument
More than 1/3! Dynamometer allows
Repeatability1
Three 1" Dynamometer allows
Repeatability
To 1/3 (Der dynamometer relative
≤1/3 Dynamometer relative
Repeatability
Long-term stability
(Dynamometer allows long-term
stability)
(Dynamometer allows long-term
stability)
Calibration items of dynamometer are shown in Table 4,
6.2 Calibration method
Calibration items
Resolution
Zero phase error
JJE J134—2005
Table 4 Calibration items of dynamometer
Indication value calculation average value
Indication value relative error
Indication value repeatability relative immersion difference
Indication value return to our cabinet relative difference
Calibration paper, etc. are given above
Display phase uncertainty
Given according to needs
6.2.1 Inspection of basic requirements of Article 4.1 shall be through visual inspection and operation 6.2.2 The safety protection performance of 4.2 shall be checked by visual inspection and operation. 2.3 After meeting the requirements of 4.1 and 4.2, the calibration of 4.3 shall be carried out: 4) Loading work before calibrating the dynamometer shall be carried out according to the instructions: H) Installation and connection of force standard thruster
1) Installation of force standard shall ensure that the force axis coincides with the force axis of the dynamometer: 2) Press the dynamometer to control the force value When including the force standard solution, a bearing with a flexible spherical surface is allowed to be used.
3) The two ends of the pull-to-test machine use a hinge connection, which should be flexible and reliable. C) Calibration of the meter characteristics
1) The dynamometer is used as the starting point for calibration. The number of calibration points is determined as needed within the measuring range. If the user observes: Generally, there are not many points, and the points are roughly evenly distributed. 2) Adjust the standard instrument (except the standard force measurement code) and the dynamometer's indication rate and other points. Along the force The force value can be added point by point on the stress axis of the standard instrument. After the calibration point is fixed, the process indication is read. This process is repeated three times in succession: the indication status must be consistent with the use status, the first calibration result is to remove the test force and then read the zero indication of the dynamometer. It is necessary to give the indication error. Usually, after the indication is corrected three times, the process calibration is repeated. 6.2.4. Calculation method of relevant technical indicators of dynamometer A) Related methods
a* =r/ F, × 100%
=1/F,×100%
In the formula:
Control point indication resolution:
————The lower limit value of the dynamometer;
The upper limit value of the dynamometer.
JK11342AU5
Binjia consumption equipment: Service monitoring can be determined according to the ratio of the center interval (the first interval): 1/2, 1/5, 1/10, when it reaches 1/1, the drop interval number is not less than 1.25ng: 3:
The counting rate is non-standard. When there is no card, the total amount is large, and the decomposition force is the effective amount. This is effective (it should be more accurate in B). The relative error is:
F. After removing the test force, the dynamometer will have the remaining center value...the lower limit value of the dynamometer
production, and the "limit value" of the dynamometer.
C) When changing the calibration, the force standard shall be used as the standard. Read the indication on the force measuring tube and enter the average value
21 indication position recognition value
3) Small package relative error
×100%
4) Relative error of indication value
) Relative error of indication value in and out
Wuzhong:
Far - Fam × 100%
F×100%
The second evaluation value of the calibration point (1, 2, ?: r) of the measuring machine:
F..—Test force corresponding to the indication of the force standard; (3)
JJF 1134—2005
Next: The arithmetic mean of the indications of the dynamometer at the first calibration point; the maximum and minimum values ​​of the indications of the 3rd process at the first calibration point; the reverse indication of the dynamometer at the first calibration point; the indication of the dynamometer at the 4th calibration point. D) According to the provisions of JJF1059—1999 "Evaluation and Expression of Uncertainty of Measurement", the uncertainty of the measurement result is given (see Appendix B).
G.3 Additional functions
Section 4.4 Requirements for additional functions: Generally, it is checked during the final setting and machine test. It can also be checked according to the needs of the user. 7 Expression of calibration results
4) The calibration certificate or calibration report shall contain at least the following information: 1) Title, such as "Calibration Certificate" or "Calibration Report": 2) Name and address of the laboratory:
3) Location where the calibration was performed (if the calibration was performed in a laboratory): 4) Unique identification of the certificate or report (such as the date), identification of each page and the total number of pages; 5) Name and address of the sending organization:
6) Description and clear identification of the object being calibrated; 7) Date of calibration, if it is related to the validity and application of the calibration results, the date of calibration shall be stated. Acceptance date
8) If relevant to the validity and use of the calibration results, the selection procedure should be explained: 9) Identification of the technical specification on which the calibration is based, including name and code; 10) Traceability and validity of the measurement standard used in this calibration; 11) Description of the calibration environment;
12) Explanation of the accuracy of the calibration result compared with the measurement accuracy; 13) Signature, title or equivalent of the person issuing the calibration certificate or calibration report, as well as the date of issue; 14) Indication that the calibration result is valid for the object being calibrated; 15) Reproduction of a certificate or report without the approval of the laboratory The uncertainty of measurement is reflected in the calibration certificate or calibration report in the following forms: 1) The arithmetic mean of the indicated values ​​at each point is taken as the calibration result (see the calibration report format in Appendix H): 2) The maximum uncertainty of the calibration result within the measurement range is taken as the calibration report format in Appendix C:
? Recalibration time interval
The recalibration time interval of the dynamometer is generally determined by the user according to the usage conditions. The longest recommended recalibration time interval should not exceed 1 year.
Appendix A
■ Overview
JF 1134—2003
Method for evaluating the uncertainty of calibration results of special working dynamometer 1.1 Standard method: According to this standard for special working dynamometer: 1.2 Environmental conditions, air temperature [0-5, the fluctuation of the calibration temperature during calibration is not more than 2℃. 1.3 Force standard: You can choose to use various forms of force standard devices such as small magnetic codes, standard dynamometers and standard dynamometers.
1.4 Calibration object: This specification applies to the rarely used working dynamometer (hereinafter referred to as dynamometer). 1.5 Calibration process: Under the specified environmental conditions, connect the force standard and the dynamometer along the receiving axis. The force value generated by the standard is used to calibrate the force value indication of each point of the dynamometer by the inverse increase of the force. This process is carried out three times in a row, and the arithmetic mean of the three indications is taken as the calibration result of the dynamometer: The calibration result can also be given in the form of the indication error of the force value:
1.6 Use of the evaluation method: For the calibration results of the dynamometer that meet the above conditions, the calculation formula derived from this evaluation method can be directly used to evaluate the uncertainty of the calibration result. 2.1 Mathematical model
2--Indication error of dynamometer:
Formula:
1-1 Corresponding to the standard force F, the average value of the dynamometer's three indications is calculated: the standard value added when calibrating the dynamometer. 2.2 Combined or standard uncertainty evaluation model! According to the mathematical error theory, formula (1) can be derived the combined standard uncertainty of the dynamometer force value error ia
(a)-star!
u\(F)+
2.2.1 Since F and F are independent, the sensitivity coefficient of H is the sensitivity coefficient of F. 2.2.2 Therefore, formula (2) can be simplified. 3 Standard uncertainty assessment of lean mass u()=(F)+u\(F) 3.1 Sources and estimates of standard uncertainty are shown in Table A.1. According to Table A, 1 obtained the standard uncertainty: according to formula (4), (10) 3.2 Standard uncertainty analysis (Product) Evaluation standard ()
Dynamometer
Force standard thruster
Indication flatness
Indication estimation ability
Standard measuring
Force charm code
Standard residual
Square lever
Dynamometer
Original: AR-
Force vertical error
Force error
Small repeatability
Force egg density
Force long-term running time
Temperature influence
Interpolation error
One knife indication position is determined.
JJF 1134—2005
Estimation of standard uncertainty sources
Half width
Uniform!
3.3 Standard uncertainty analysis () According to the use of different force standards, evaluate 3,3.1 Use standard force lever
(F)-()
3.3.2 Use standard force lever
3.3.3 Use standard force instrument
Distribution factor
3.4 ​​Synthetic standard uncertainty calculation formula
3,4.1 When using standard force measurement base code, the piece formula formula (4) and (5) are substituted for formula (3), that is, ()
3.4.2 When using the pole-precision force measurement cabinet rod, calculate formula 8
Uncertainty
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