JJG 929-1998 Digital altimeter JJG929-1998 Standard download decompression password: www.bzxz.net
This regulation is applicable to the calibration of digital altimeters with a resolution of 0.1μm to 1μm and a measuring range of up to 1.5m, which are newly manufactured, in use or after repair.

National Metrology Verification Regulation of the People's Republic of China J3G929--199H
Digital Display Height Mearsuring Insirumen11997 12-1 1 Issued
Implementation on 1998-08-01
Issued by the State Bureau of Technical Supervision
.IJG929—1998
Verification Regulation of Digital Display Height Mearsuring Instrument1998
JJG 929-
This regulation was approved by the State Bureau of Technical Supervision on December 11, 1997 and came into effect on August 1, 1998.
Responsible for: Sichuan Provincial Technical Supervision
Drafting unit: Institute of Optoelectronics Technology, Chinese Academy of Sciences The drafting unit is responsible for interpreting the technical provisions of this regulation The main drafters of this regulation:
Fan Tianquan
Lu Deji
Meng Jia Drafting person:
Wu Xueqiao
Geng Lihong
JJIG929—199H
【Institute of Optoelectronics Technology, Chinese Academy of Sciences】【Institute of Optoelectronics Technology, Chinese Academy of Sciences】(Institute of Optoelectronics Technology, Chinese Academy of Sciences) (Institute of Optoelectronics Technology, Chinese Academy of Sciences) Description
Verification items and verification conditions
Obtaining techniques and methods
IV. Verification of nesting treatment and combing period
1.IG929—199B|| tt||Digital display height measurement verticality error calibration data processing Appendix 1
Appendix? Digital display height measurement instrument indication error calibration data processing (1)
JJG929—I998
Digital display height measurement instrument calibration procedure
This procedure is applicable to the calibration of newly manufactured, in-use and repaired digital display height measurement instruments with a resolution of 0.1-[m: range to 1.5m:
1 Overview
The digital display height measurement instrument is a vertical single-point mathematical geometric measurement instrument with optical and capacitive sensors as the main components: it is used to measure the quotient of parallel planes, hole axis diameter, center distance and form error, etc. Its structural diagram is shown in Figure 1. The measuring range is 500mm: 800mm and 1000mm, and the instrument is divided into 0, 1 and 2 levels of tension and guide.
Center recorder
Kyoko Electric
1 Schematic diagram of the structure of the digital altimeter
2. Verification items and verification parts
1 The inspection items and verification main instruments of the digital altimeter are shown in Table 1. 2 Verification conditions
Indoor temperature for verification of digital altimeter: Level 0 is (201), level 1 and level 2 are (202)℃: The temperature change shall not exceed 0.3℃ per hour: The time for the sensing instrument and the verification card to balance the temperature shall be no less than 12h: Various factors such as alarms that affect the work shall be considered in the verification. 1
Inspected items
Interaction of various parts and general performance
Instrument data
Indication error
Anti-electrical interference capability
JJG 929—1998
Main instruments for calibration
Dynamometer with a graduation value of 0.5N
Micrometer, 00-grade plate, 0-grade angle ruler
D)-grade plate, third-grade reduction block (or double-sided laser interferometer)
Three: "" in the table should be calibrated, "" indicates that it is not required: Technical requirements and calibration methods
3 Appearance
3.1 Requirements
Certification category
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In use
3.1.1 The instrument should work without defects such as marks, scratches, burrs and scratches. The non-working surface of the instrument should not have defects such as coating peeling and rust. The steel strip should be flat and smooth without wrinkles. 3.1.2 The nameplate should have the manufacturer's name (or factory logo) and factory number. 3.1.3 The markings, lettering and engravings should be correct and clear. 3.1.4 The above defects that do not affect the function and accuracy of the instrument are allowed during use and after repair. 3.2 Verification method: Daily observation
4 Interaction and general properties of each part
4.1 The moving part should be flexible, stable, without the phenomenon of falling, and reliable. After starting the gas, gently check the bottom of the instrument on a smooth flat surface. 4.1.2 The switches and buttons of the electrical part should be sensitive and reliable, and the indicator lights and display units should work normally. JJG929—1998
4.1.4 The printer and each part must meet the following standards: 4.2 Verification method: Daily observation and test: 5 Force measurement
5.1 Double: .5. 0V, the force change per test shall not exceed 0.55.2 Calibration method
The head to be tested shall act on the dynamometer 1 with a scale of 0.5N, and wait for the elastic contact to send out a sampling signal or drive the rigid probe to slip and send out the force: During the calibration, the upper and lower positions of the force shall be selected, and the maximum force in the middle and lower positions shall be the force, and the maximum and minimum values ​​shall be the force change: 6 The verticality of the instrument (the verticality between the positioning track of the sliding seat and the base) 6,1 Infant water: The requirements for the degree of this drop are shown in Table 2. Table 2
Electrical level
t.: !. The principle (mn..
6.2 Calibration method
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Inspect the 00-level square ruler on the 00-level board, install the micrometer on the measuring slide, make the probe contact with the effective straight line [see Figure 2 (a)], move the measuring slide up and down, the micrometer indication value changes the most, which is the face-to-face verticality. Install the micrometer, make its probe contact with the straight line [see Figure 2 (a)], and calibrate the verticality of the side mountain according to the above method: when the verticality error of the square ruler is greater than 13% of the tolerance of the instrument, measure in the reverse direction, and rotate the instrument to be inspected by 18% so that the probe of the micrometer is still in contact with the straight line, and the measuring point is the same as the positive measurement (see Figure 2 (b)). The positive measurement difference of each measuring point is 12%. The data is recorded without deletion. 7 Repeat the bucket
7.,1 Requirements: Level 2 m, 1st level 3 mm 2nd level 4 m 7.2 Calibration piece method
In the absence of air flotation, the measurement is performed at the kidney seat, middle, and lower 3 positions of the instrument. Each position is re-measured for the corresponding height 0 times, and the normal error is taken. The maximum extreme error is the complex K value error
5.1 Requirements: The indication error requirements and the qualified grade of the calibration volume are shown in Table 3 5.2 Qualification method
5.2.1 The measurement value of the single-piece isolation block group is shown in Table 4, 3
Receiving end difference
Note: L range (mmi.||tt ||1.1G929—1998
Figure 2 only shows the front of the instrument,
example vertical self-test
indication error/urr
determine the use of the same fabric
JJG929—199月
B.2,2 Place the instrument under test and the gauge block group on a 0U effective flat plate, and measure the length of each gauge block under the condition of no air flotation (repeat the measurement times and take the average value as the measured value). The actual value of the measured length is L:, and the measurement error of the altimeter is measured! . , L,, the difference between the maximum and minimum values ​​of △: is the measurement result, that is, the indication error At = IAl, inax IAl Ihane
For data processing, see Appendix 2.
The indication error of the digital altimeter can be verified by using a height calibration gauge or a dual laser.: Anti-electrical interference capability
.1 Requirement: The instrument should work normally in the presence of interference. 9.2 Verification method
In the verification environment, turn off the power supply of other instruments and equipment, and the digital display of the detector should be normal. IV. Verification result processing Verification cycle
1 If the altimeter meets the requirements of this regulation after verification, a verification certificate shall be issued; if it does not meet the requirements of this regulation, a verification result notice shall be issued.
11 The recommended verification cycle of the digital altimeter shall be determined according to the actual use situation, generally 1 year, and the longest shall not exceed 2 months. Appendix 1
Position/mm|Allow thinning
Appendix 2
Measurement of missing group size
Show error
.IJG929—1998
Vertical error calibration data processing of digital altimeter Forward method determination
Upward
Reverse method determination
Upward measurement
Vertical error calibration data processing of digital altimeter indication
English 1 drink
At =At
Second time
Average inquiry
-=.008 mtn
16 jin.227
Upward reverse difference 12
(7(3) - (6))/2
Indication error
(3) = (2) —(1)
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