Some standard content:
National Metrology Technical Specification of the People's Republic of China JJF1096-2002
Calibration Specification for Calibrstor of Extensumeters
Issued on 2002-11-04
Implemented on 2003-02-04
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
1.IF1096-2002
Calibration Specification for Calibrator of Extensomcters
J.IF 1096-
This specification was approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on November 4, 2002 and came into effect on February 4, 2003 Effective from:
Responsible unit: National Technical Committee on Process Parameter Metrology Main drafting unit: Shaanxi Provincial Measurement and Testing Institute Additional drafting unit: Xi'an Century Measurement and Control Technology Institute Analysis and Testing Institute of General Iron and Steel Research Institute
The entrusted unit of this specification is responsible for interpretation
The main drafters of this specification:
Shi Jize
Shi Chunhua
JJF1096—2082
(Shaanxi Provincial Measurement and Testing Institute)
(You'an Century Measurement and Control Technology Institute)
(Analysis and Testing Institute of General Iron and Steel Research Institute) 1
Non-use
Measuring characteristics:
JJF 1096-:20413
4.! 4.2 Quality of micrometer head's scale lines and alignment of its parts, coaxiality and resolution of indication error 4.5 Indication determination 5 Calibration conditions Environmental conditions 5.2 Calibration items Calibration equipment (calibration method) Quality of micrometer head's scale lines and alignment of its parts, coaxiality and resolution of its parts 6.1 Indication error Overall indication error t||Calibration result expression
Recalibration requirements
Aggregate A
Appendix B
Document certificate for calibration instrument indication error Application of calibration instrument special workbench
Contents of calibration certificate
·(2)
(3)
1JF1096—2002
Calibration specification for extensometer calibrator
This standard is applicable to the calibration of special calibration equipment (hereinafter referred to as calibration equipment). 2 References
JJF1-1998 General Terminology and specifications
JF1059—1999 Evaluation and expression of measurement uncertainty 15095!3:1499 One-way test of metal materials J8/1x33—1999 Microscope
This specification is for use with the above-mentioned specifications and is valid for the current version 3. Overview
A calibrator is an instrument that can accurately measure the displacement change of the spindle. It has a rigid bracket, two identical mounting brackets and a large measuring head. The calibrator connection type is divided into Class A and Class B, and the structure is shown in the figure. See Figure 1 and Figure 2. The common instrument is a type B calibration instrument with a micrometer head to realize displacement and measurement, and ... 1096—2002
4.1 The weight and position of each part of the micrometer head 4.1.1 The scale is clear and the width difference of the scale lines shall not exceed 0.05mm; the center graduation value shall not exceed 0.25μm.
4.1.2 The distance between the upper edge of the horizontal side of the micrometer head micrometer tube surface and the scale surface of the fixed sleeve shall not exceed 0.4mm. The end of the micrometer tube shall be aligned with the scale mark of the fixed sleeve, and the end face of the micrometer tube circular surface shall not be closer to the lower edge of the second crack line of the fixed sleeve, or the water load shall not exceed 0.05mmn, and the offline value shall not exceed 0.1mm. 1.1.3 The micrometer head should be accurately and reliably adjusted. The device to be checked is: when the zero position is reached, the equal scale line of the fixed sleeve and the corresponding scale line on the differential scale should not exceed 0.005mm, and the overlap between the tail scale line and the corresponding scale line on the differential scale should not exceed 0.05mm. 4.21, the coaxiality of the lower spindle, the axiality of the lower spindle should not exceed .14.3 The resolution (or resolution value) of the micrometer device should not exceed 12 of the absolute error value in the table! 4.4 Indication error
The indication error does not exceed the maximum allowable error specified in Table 1. Table! Allowable error of indication value
Calibrator type
Class A or B
Calibration extension
Absolute error un
(applied when the calibration filter is not 1mm)
0 2,-0.2.
- 0.5, -0.5:
: -1.0, -1.0
2 0,3.3.0:
Adjacent error! 4.5 Indication stability J.IF1096—2002 The stability of the indication shall not exceed the absolute error value in the table within 1h. 4.6 Bracket measurement When the upper channel is subjected to a gravity of N, its position change does not exceed .1m: calibration, the room temperature is not zero, the measurement should be consulted first, and the control case is accurate. Environmental conditions 2. Table 1 Calibration environmental conditions Standard category Test performance/T: 20 = 5.2 Items and calibration equipment Temperature () The requirements for the use of (quality) standards and other equipment for each calibration item can be found in Table 3. Table 3 lists the calibration items and calibration equipment. Calibration items: Probe line quality and relative accuracy of each part, upper and lower centerline error, stability, stability, calibration performance, calibration, isothermal time slices, other standards and other equipment changes in room. Magnification: (used when necessary) 1 microscope 5mm concave ruler and saddle ruler (2 velvet) for observation 2nd, 3rd, 4th or 5th grade Equivalent skin: The measurement value (or force) of the instrument exceeds .m, the comparison instrument or other measuring instruments with the same measurement capability, the laboratory measurement capability that can be provided is not more than the corresponding type of calibration end effect error (1/3)-(1rs)
Base fertilizer special Ma Lian 1 and three-bead workbench (see Appendix B)
In addition to the equipment required by "No. 4", the timing pin 100g da code and [arbitrary equal wave] are used in turn
★ or the maximum measurement capability. The 5% accuracy rate [or the expansion of the non-phosphorus degree including L=2) is indicated, and the calibration method
First check the appearance and make sure that there are no factors that affect the calibration results before calibration, 3
J.IF 1096--2002
6.1 The quality of the scale lines of the micrometer head and the relative positions of the various parts shall be inspected. If necessary, a professional microscope may be used: 6.2 The distance between the fixed sleeve section line surface on the edge of the differential cylinder is 0.4m. The fixed sleeve section line surface is relatively close to the differential cylinder. The differential cylinder is corrected on the edge of the differential cylinder and the sound is not higher than the surface of the scale. The differential cylinder is accurate in any circle. The position of the differential cylinder is not less than 100%. It can also be measured with an industrial microscope. 6.1.3 The end face of the differential surface is aligned with the horizontal scale of the fixed start. First adjust the differential quotient to the vicinity of the zero scale line, and then make the end face of the differential quotient conical surface coincide with the lower edge of the scale line. At the same time, read the zero scale line. The displacement of the scale line is the offline or pressure line value, see Figure 4.
Figure 4 Offline pressure line
6.2 The coaxiality of the upper and lower spindles
Adjust the calibration instrument 1, and the ends of the two spindles are aligned with each other. Place the measuring ruler about uuu long along the axis and lean it against the centering shaft. Use a plug to measure the maximum distance between the knife-shaped ruler and the end of the movable center. Use twice the value as the reference value.
6.3 Resolution
Day observation, || tt||6.4 Indication error
6.4.1 Selection of calibration range, nominal length interval and grade of calibration gauges Within the selected calibration range, the ratio of the maximum calibration point E to the minimum calibration point E should be 5 to 10 times the selected calibration point, that is, according to the above principle, examples of the selection of nominal length intervals of calibration gauges are shown in Table 4: The grade of gauges selected within each calibration range can be referred to in Table 5. 4.2 Direct method
As shown in Figures 1 and 5, install the indicating gauge on the calibrator fixing bracket and place the agate or 4
JJF 10962002
1 calibration block nominal length waste interval selection example r
nuclear wide piece block nominal length fixed displacement pad not marked your length! According to who uses the nominal length of the column 0.0F2
1.0 11.11
1 0 i1.5:
1.0 16.0:
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Table of blood levels selected in each epidemic standard range
standard energy method
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device
calibration loop
:0, 1.01 mm
When connected to the
calibration main
control standard violation
:1, 5] nu 1(5, 25. tum
with 3 method
calibration range
(c, 1.0. nn
Second grade: The number of watts shall be measured in strict accordance with the agreement
The most appropriate test process shall be required
(3 types)www.bzxz.net
The three-ball workbench shall fall on the probe axis, so that the measuring axis of the instrument passes through the center position of the workbench or bed, adjust the micrometer head to the selected calibration starting position, and the spherical probe and the inductive ball will work effectively...-a single block (to the center point of the user or the center of the special work), only the probe and the type are connected and the initial effective value is recorded, and the effective value is recorded, and the differential sense is rotated to each Calibration points: The city changes each probe in turn in an inversely increasing to decreasing manner, and sets the receiving and recording intervals from the initial value on the table: For calibration points not exceeding 1/3, the absolute error of the indication of each point is calculated according to formula (2): 4 = A-(1-2)
Wu: A4
The deviation between the reading of the instrument and the initial value at a certain calibration point, m; A. The deviation of the measurement used at the calibration point according to the measurement determination, um: The end error of the measurement used when aligning to the initial position: 1: Ai
For calibration points not exceeding 1/3mm, the absolute error of the indication of each point is calculated according to formula (3): 1- (22-26)
#: the calibration point’s value,
Finally, select the point with the best error as the measurement result, (2)
6.4.3 Pairing method
JJF1096—2002
Indication table showing the total value
? Comparison measurement item meaning:
Mother or son
Three-motion system
Micro-head
Figure 5Calibration of Class R calibrator
Use the block grade selected in the “Pairing method” column in Table 5 to calibrate the Class 4 calibrator within the 1mml light range. When calibrating the indication of the point in the forward or reverse direction by the pairing method, rotate the differential to align the first block with the zero position of the instrument, and then replace the three blocks of the relevant length in increasing or decreasing manner, and read the number on the instrument; the second block can be aligned with the zero position, and then the first block of the relevant length can be replaced in increasing or decreasing manner, and the readings are read on the instrument at the same time: Repeat this process until all the calibrated points are calibrated. Take the arithmetic mean value of (-1) readings at each calibration point as the measured value of the point. The minimum error of the calibration point
is:
≥A; when the calibration point is calibrated with each pair of blocks, the algebraic sum of the differences between the reading value and the nominal value, μmal, the deviation of the nth (last) block according to the equal inspection delay, mm; the first block is used for the basic error of the quarter position according to the equal inspection, Im; the number of blocks used is: the total number of blocks. (4)
For example, for the A-type calibrator equipped with a digital display inductive micrometer, 4 pieces of 3 equal pieces are used to calibrate the 0.1m range. Taking the two points of -10m and +10m as examples, the control results are shown in Table 6. Calibration can be performed in the positive and negative displacement directions of the movable spindle, or in two directions. Finally, the maximum value of the absolute error or relative error in each point in the same direction is taken as the calibration result. When calibrating the positive indication: the nominal length of the gauge block is increased: When calibrating the negative indication: the nominal length of the product block is decreased. At this time, it must be noted that the gauge block is selected first, and then the displacement of the differential is adjusted. 6
Pair gauge block
JJF1096—2002
Table 6 Paired calibration +mm point indication error (pm) point
Calibration gauge
Reading micrometer
Yaa,--n.3pm
1.00m Product ratio code: +0.32um
Calibration point 0 indication error:
0.3 ( +0.32+0.1)
6.5 Indication stability
For special block
Control (-mm) point
Control salt support
Night effective value
±≥4,-0.9pm
1.03mm block error
Calibration point-um value error:
<0.01-0.322_n.19/m
The instrument probe on the calibrator is aligned with any equal value in the effective tube on the micrometer workbench Connect the measurement units one by one and adjust the indication to any point within the calibration range. After the indication becomes stable, record the first reading and then record the changed reading every 5 minutes. Observe for 1 hour and take the difference between the maximum and minimum readings as the calibration result. 6.6 Bracket rigidity Use the device shown in Figure 1 or Figure 5, compare the pointer (index) of the instrument to a certain standard (degree), apply a vertical force of IN to the upper bracket (e.g., find a 100 degree mark on the upper bracket close to the indicator), and the change in the indication of the instrument is the calibration result.
To express the calibration result
The calibration result should be given in the form of "calibration certificate" or "calibration report". The content is shown in Appendix: 8 Recalibration interval
The calibration unit can decide the recalibration interval according to the actual use situation: it is recommended not to exceed 1 year, Appendix A
JIF0962002
Measurement uncertainty of indication error of extensometer calibrator "Indication method and excitation model
11 Square effect
4 Indication error of calibrator, mainly micrometer: No electric sensor, 01 Scanning The indicator pool can be 0.1, 0.11m, and the standard of this teaching is 0.1. The main set is the six indicators of the melting quantity. The example uses 3 to lose the total torque and the efficiency is increased. When the uncertainty is expressed in absolute flat form, the most suitable point (3) for evaluation is selected: the uncertainty is expressed in the form of a process, and the most accurate point (0.4m) for evaluation is selected as the key point for the temperature difference.
A.1.2 Mathematical model
The solution of the calibration method is to ensure that some points are - (A-)
-? (e-t+ara)
When calibrating at each point, the difference between the method and the nominal value is m; the deviation of the first (last) measurement according to the equivalent determination, m; the error of the first ten pairs of calibrations, m; the number of blocks used, the total number of blocks: the nominal value of the calibration point (), in this case 100: the number of linear shadows of the blocks is 11.5×10*/rate over the reference temperature (20) beat you, let the calibrator Liu to the temperature of the block, is 0.5℃;. Although the average coefficient of the calibration of the block is 2,10-, the value of the calibration point is very small, under the standard conditions: the above test "item" can be ignored:
Lu connection method measurement error 4 of the calibrator at a certain calibration point is =41(a1-a -+ 0-3i+A-8)
The value of the test instrument at the user's point is the same as the value of the initial value. The deviation of 2 is determined by the base of the nuclear production. The deviation of the starting silk is determined by the delay of the inspection. The nominal value of the standard point () is 300400;! Under the same conditions of the school, the price can be ignored (A.2)
Note: school, the uncertainty of the ring: he, the hospital car certificate point is small, the exchange volume is large, and the home benefit store is 8
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