Some standard content:
National Metrology Verification Regulation of the People's Republic of China JJG21
Level Verification Device
Icl Veritication Sst:ni
Approved on 2001- 03- 02
Implementation on 2001- 06- 01
Promulgated by the State Administration of Quality and Technical Supervision
JJG960
Veritication Regulation
of Level Verification SyslemJJG §60 —2001
This regulation was approved by the State Administration of Quality and Technical Supervision on March 2, 2001, and shall be implemented on June 1, 2001.
Responsible unit:
Main drafting unit:
Participating drafting unit:
National Technical Committee for Geometric and Angle Metrology
China Institute of Metrology
Wuhan Institute of Geometry and Geophysics, State Administration of Geography
This regulation is entrusted to the National Technical Committee for Geometric and Angle Metrology to be responsible for the interpretation of this regulation. Main drafter
Meng Jia Drafter:
Fu Huiqing
JJG900—2001
(China (with Institute of Metrology)
(China Institute of Metrology)
(Wuhan Institute of Seismology, State Seismological Bureau)2
References
Metrological performance requirements
General technical requirements
Metering end control
Verification parts
Verification items
Stability method
Verification treatment
Verification cycle
Thanks for recording in
Calculation example-
.I.1G 960—2001
Record verification certificate and verification failure notice3 Inner page format3
1 Scope
JJG 9G0 —2801
Level Calibration Device
This procedure is applicable to the initial calibration, subsequent calibration and in-use inspection of various level calibration devices: 2 References
JG4251994 "Level Calibration Procedure"
JB/T7399—1994 Collimator 3
JJF1059--1999 "Evaluation and Expression of Uncertainty in Measurement" JF1I-199R "General Measurement Methods" When using this procedure, attention should be paid to The current valid version of the above document shall be used. 3 Overview
The main performance of the level calibration device is twofold: one is a horizontal line of sight with a target at infinity, and at least five crosshair targets should be distributed on the line of sight from 5m to infinity. The working principle of the device can be divided into two types: direct calibration and comparative calibration. Direct calibration is divided into automatic calibration and electronic water bubble type. The automatic calibration type adopts an automatic parallel light tube, and the principle of the calibration device is shown in Figure 1. Electronic water bubble The collimator uses the three-point inter-adjustment method to adjust the sight line of the standard collimator, and uses the electric bubble installed in the autocollimator to monitor and read the effect. The collimator uses the sight line of the high-precision level of the angle 4 as the standard, and adjusts the collimator as the standard to produce a temporary horizontal sight line. The working principle of the installation is shown in Figure 2. Note: The angle refers to the parallelism of the telescope's vertical axis and the projection of the tubular collimator axis in the vertical plane. The automatic leveling collimator uses the electric bubble installed in the autocollimator to monitor and read the effect. The collimator uses the high-precision level of the angle 4 as the standard, and adjusts the collimator as the standard to produce a temporary horizontal sight line. The working principle of the installation is shown in Figure 2. Note: The angle refers to the parallelism of the telescope's vertical axis and the projection of the tubular collimator axis in the vertical plane. Performance requirements
The controlled level receiving
flat light tube
water who instrument inspection device is divided into three levels, the total performance is as shown in the table. 5 Technical requirements
5.1 The coating and paint surface of the new inspection device should not be scratched or peeled off. High-precision level
Shenxing Optical Institute
Water Xiangfu is old
More standard you high-level standard
Thank you for the award
Compensation version
J.IG 960F —2001
Table 1 Metrological performance requirements
Six awards
Li Cheng instrument small hundred lessons
Engraved quality difference
Technical calibration instrument industry number
This is not the case
Ixsvos
5.2 Standard and reliable installation! There should be obvious burns and scratches, as well as basic defects that affect the use
3.3, flat, light and field uniformity, clear images, no dust that affects the reading effect, mildew, and the coating should not have other defects that affect the reading effect.
5, The name and logo should be marked on the notice, and the name and logo should be marked. 6.1.1 Calibration equipment: horizontal collimator (down pipe measuring instrument, self-aligning straight line detector, flat reflectometer, high-precision cumulative calibrator (level 0 or above), etc. 6.1.2 Calibration environment conditions: indoor temperature requirements: temperature range: indoor temperature change per year: h: humidity: 75% Specified equipment and the equipment to be tested shall be installed in the indoor model of the above system 2. Check the quality of the test results (see Table 2)
6.3 According to the standard method
6.3.1 The external part of the test results
6.2 The test results of the 14th American strict test results must be tested with the standard:
The external part and the parts are listed and tested
The semi-light band
The error is shown after the scale is displayed
The total error of the strong platform
The error of the level line is read
Dongping resistance line deviation, Hua
An H standard deviation high standard line ticket
Note: "+\ table in the center;| |tt||6.3.3 Micrometer small equipment
3TGSG0
Table 2 Verification itemsbzxz.net
Word Some equipment to be inspected
Daily test
"Initial inspection and subsequent stable use verification
According to J9/T7395—1954, the light tube
High decoration level
can be used for its micro-flow
Consult and consult
Start with good advice
White danger instrument and accompanying instrument
With the precision level instrument
Elements may be uncertain
Inspection and installation of some defects The instrument is a convex semi-micrometer, and its positioning method is as follows: 6.3.3.1, adjust the high-precision level (called level tube) so that it can aim at the double-check cross-reticle mark in the self-collimation light path, install the flat micrometer structure mark at 50 grids, and place the level micrometer index in the recessed position, 6.3.3.2 adjust the small collimator telescope to make the true reticle and the self-collimation light coincide with each other, 6.3.3.3 focus the level telescope again to make the basic collimation line 2m mark clear, lift and adjust the workbench and level so that the level's reticle and the elimination line must coincide with the "2m" mark. 6.3.3.4 Repeat 6.3.3.2 and 6.3.3.3 to ensure that the optical clock of the telescope of the hydrometer and the optical track of the downloading instrument are fully overlapped. 6.3.3.5 Adjust the hydrometer to the Sm date standard to ensure that the water level of the two digital lines are aligned (the lifting table can be adjusted if they do not overlap).
Turn the plate grid gauge to the grid, and at the same time rotate the level so that the micrometer coincides with the horizontal line, and record the micrometer reading of the level as
6.3.3.7 When aligning at 70, 90, 110, 130, and 150, the readings are 0~, 3, and 0% respectively. When returning to measure, the readings at 150, 130, 110, 90, 70, and 50 are,,,,, 1,06.3.3.8 Use the following fraction to calculate in reverse order: =[A-(×grid value
Wherein: A—nominal grid value;
(a; + ±:/2;
ag+ag) /2.
Take the maximum difference between the measuring point and the nominal value as the micrometer indication error (see Table A.1 in Appendix A): 6.3.4 Scale indication error
In some level calibration equipment, a micrometer scale should be used to detect the minimum value error of the micrometer. A universal scale should be used. For micrometers with deep indication, the scale range should be equal to 0m. During measurement, 3
JJG 960 —2001
are averaged at 3
JJG 960 —2001
distributed measuring points are used. The difference between each measured value and the nominal value is the error. The difference between the measured values and the nominal value is taken as the indication error of the scale. The calculation formula is as follows:
- B()s
Where: B nominal value;
h: measured value at each point:
—initial value
It can also be tested with other devices with an expanded uncertainty not greater than 0.04nml (left=2). 6.3.5. Micro-tilt table indication error
Use autocollimator with error 1 and plane reflector to select calibration, as shown in Figure 3. The specific steps are as follows: White collimation
Reflection micro-tilt table
6.3.5.1 Place the plane reflector on the micro-tilt table so that the reflector and the tilt axis are parallel. First set the micro-tilt hand wheel to 0, and rotate the autocollimator to make it the most accurate reflector. Aim at the horizontal line of the ten-point image of the white collimator and read 406.3.5.2. Turn the micro-tilt wheel 4 and 8 degrees counterclockwise in turn and read 0=1; 216.3.5.3. Re-center the micro-tilt handwheel and read the collimator to find the flat image position and read 4.u. Turn the micro-tilt handwheel 4 and 8 degrees clockwise in turn and read a1, 442a
6.3.5.4. Calculate the difference of the 0 position respectively, and the difference is within 1. 6.3.5.5. Use the same method as above to calibrate the indication error of the micro-tilt handwheel of the direction. The calibration device of bubble level requires that the micro-tilt range of its micro-level table should exceed 1.5”. 6.3.6 Level line compensation function error
For the calibration device of white dynamic level, the photoelectric white collimator with a value of 0.2 is used to calibrate its compensation function. The specific steps are as follows:
6.3.6.1 Put the white collimator on the workpiece, adjust its foot to the wheel, aim the negative collimator at the instrument under test, read the horizontal reading of the cross image of the instrument under test, adjust the foot of the instrument under test to the wheel, repeat the measurement three times until the horizontal position is reached, and take the average value.
6.3.6.2 Adjust the foot of the instrument under test to the wheel, repeat the measurement three times until the horizontal position is reached, and take the average value. The feet are on the wheels, tilted 4 degrees forward, backward, left and right respectively, and the measurement is repeated three times. The average value is: ,, after calculating the difference, the maximum deviation is multiplied by 4, and the cabinet error is calculated [(\)1. Since the reading system of the level is set to the self-collimation state: when reading the target (transmission reading), the reading value should be multiplied by 2 as the actual result (see Table A.2 in Appendix A). 6.3.7 Horizontal alignment line deviation || tt || Horizontal alignment line deviation is an important indicator of the level calibration device: the detection equipment adopts a detector with an expanded uncertainty of no more than D.2" (=2) and a 0.2 photoelectric collimator (field of view). The physical measurement steps are as follows 6.3.7.1 The focus handle of the device to be tested is effectively in the α position. 4
.IJG 960—2001
6.3.7.2 Adjust the collimator to align with the device to be inspected, place the device to be inspected between the autocollimator and the device to be inspected, and level it. 5.3.7.3 Adjust the foot of the autocollimator to the wheel so that it is lower than the first working surface of the device to be inspected, read the horizontal position of the reflected image three times, and take the average value as 1. Rotate the collimator by 1°, i.e. P, aim the autocollimator at the second working surface of the collimator, read the crosshair position three times, and take the average value as 2. Then take the crosshair horizontal position of the autocollimator field of view for 2 times, and take the average value as α. Calculate the standard horizontal alignment position A according to the following formula: 4=-(a1)/2
6.3.7.4 Keep the autocollimator still, take the collimator away, and read the crosshair position of the level calibration device in the first position from the collimator (transmission reading!), and take the average value as . Put the instrument to be inspected in the second position, read the crosshair position three times, and take the average value as . Read the crosshair horizontal position of the autocollimator field of view for 2 times, and take the average value as . Calculate the horizontal alignment position according to the following formula: B=2u (b16) /2)
6.3.7.5 Calculate the deviation between the horizontal line under test and the standard horizontal line according to the following formula: C=RA
Note: The actual value of the error is also determined according to the different readings of the self-elevator used. (4)
6.3.7.6 Repeat the measurement three times and take the average value as the horizontal line error of the instrument (see Table A.3 in Appendix A). Other methods can also be used to calibrate the horizontal line error. The expanded uncertainty (=2) of the most important method should not be too large. 1/3 of the filling error, 6.3.8 Multiple H standard deviation from the standard error
Use a high-precision level (hereinafter referred to as the level) with no focusing error in principle as the standard for measurement. The specific calibration steps are as follows:
6.3.8.1 Place the level on the calibration table: Make the optical axis height of the level and the device to be inspected roughly the same, level them, and strictly adjust the micrometer to S.0. Adjust the level to infinity, observe the mark of the device to be inspected, and adjust the micrometer screw of the device to be inspected so that the horizontal thread of the mark coincides with the horizontal thread of the level scale plate. 6.3.8.2 Adjust the level to the near point, observe the national standard of the device under test, adjust the height and level of the level, and make the target horizontal line of the near point of the device under test coincide with the level scale plate, and repeat the above operation until the test device and the far and near moon mark of the level coincide. 6.3.8.3 Turn the focusing hand wheel of the level, aim at the 5m, 10m, 20m+3m, 50m moon mark in the test device in turn, and use the micrometer of the level to read the machine difference between the position of the objective measuring point and the position of 5m. This is a measurement, and the two measurements are measured and the average is calculated. The maximum difference is taken as the multi-day standard deviation error of the device under test. : (See Table A.4 in Appendix A) u
It is also possible to use other devices with an expanded uncertainty (point = 2) less than 1/3 of the standard of the device under test for detection. During arbitration verification, it must be based on the verification method detailed in this regulation. 6.4 Handling of verification results
After verification, the verification certificate of the level device that meets the requirements of this regulation shall be issued, and the corresponding grade shall be indicated. The device that fails the verification shall be issued with a verification failure notice, and the unqualified items shall be indicated. The inner page format of the verification certificate and the verification failure notice is shown in Appendix B
6.5 Verification cycle
JJG S(0 —20e
The verification cycle of the level verification device shall be determined according to its stability, environmental conditions, and frequency of use, and shall not exceed one and a half years at most.
Appendix A
Presentation of the instrument
Level meter readings
(ag-)i
I.TG: ——2001
Calculation example
Micrometer indication error
Micrometer indication error: 3=1A,-(z-)1×grid value=1.2×0.05ma=0.05:m
Table A.2 Horizontal standard compensation error
Average gain
Compensation difference=0.0%4=0.03/1
Standard, n
Line 4
Right 4
Horizontal directrix deviation:
: d=a-
(+)/2:
JIG 560—201
Table A.3 Horizontal directrix deviation
2 [5u- (5+b) /2.:
Table A.4, multi-target deviation error
multi-day target deviation error: take the larger value - the minimum value! × road value = 0.15 × 0.05 mm = 0.08 mm 56.62 Photoelectric collimator (field of view). The physical test steps are as follows 6.3.7.1 Focus the handle of the device under test in the α position. 4
.IJG 960—2001
6.3.7.2 Adjust the collimator to align with the device under test, place the collimator between the collimator and the device under test, and level it. 5.3.7.3 Adjust the foot of the autocollimator to the wheel so that it is lower than the first working surface of the collimator, read the horizontal position of the reflected image three times, and take the average value as 1. Rotate the collimator by 1°, i.e. P, aim the autocollimator at the second working surface of the collimator, read the crosshair position three times, and take the average value as 2. Then take the crosshair horizontal position of the autocollimator field of view for 2 times, and take the average value as α. Calculate the standard horizontal alignment position A according to the following formula: 4=-(a1)/2
6.3.7.4 Keep the autocollimator still, take the collimator away, and read the crosshair position of the level calibration device in the first position from the collimator (transmission reading!), and take the average value as . Put the instrument to be inspected in the second position, read the crosshair position three times, and take the average value as . Read the crosshair horizontal position of the autocollimator field of view for 2 times, and take the average value as . Calculate the horizontal alignment position according to the following formula: B=2u (b16) /2)
6.3.7.5 Calculate the deviation between the horizontal line under test and the standard horizontal line according to the following formula: C=RA
Note: The actual value of the error is also determined according to the different readings of the self-elevator used. (4)
6.3.7.6 Repeat the measurement three times and take the average value as the horizontal line error of the instrument (see Table A.3 in Appendix A). Other methods can also be used to calibrate the horizontal line error. The expanded uncertainty (=2) of the most important method should not be too large. 1/3 of the filling error, 6.3.8 Multiple H standard deviation from the standard error
Use a high-precision level (hereinafter referred to as the level) with no focusing error in principle as the standard for measurement. The specific calibration steps are as follows:
6.3.8.1 Place the level on the calibration table: Make the optical axis height of the level and the device to be inspected roughly the same, level them, and strictly adjust the micrometer to S.0. Adjust the level to infinity, observe the mark of the device to be inspected, and adjust the micrometer screw of the device to be inspected so that the horizontal thread of the mark coincides with the horizontal thread of the level scale plate. 6.3.8.2 Adjust the level to the near point, observe the national standard of the device under test, adjust the height and level of the level, and make the target horizontal line of the near point of the device under test coincide with the level scale plate, and repeat the above operation until the test device and the far and near moon mark of the level coincide. 6.3.8.3 Turn the focusing hand wheel of the level, aim at the 5m, 10m, 20m+3m, 50m moon mark in the test device in turn, and use the micrometer of the level to read the machine difference between the position of the objective measuring point and the position of 5m. This is a measurement, and the two measurements are measured and the average is calculated. The maximum difference is taken as the multi-day standard deviation error of the device under test. : (See Table A.4 in Appendix A) u
It is also possible to use other devices with an expanded uncertainty (point = 2) less than 1/3 of the standard of the device under test for detection. During arbitration verification, it must be based on the verification method detailed in this regulation. 6.4 Handling of verification results
After verification, the verification certificate of the level device that meets the requirements of this regulation shall be issued, and the corresponding grade shall be indicated. The device that fails the verification shall be issued with a verification failure notice, and the unqualified items shall be indicated. The inner page format of the verification certificate and the verification failure notice is shown in Appendix B
6.5 Verification cycle
JJG S(0 —20e
The verification cycle of the level verification device shall be determined according to its stability, environmental conditions, and frequency of use, and shall not exceed one and a half years at most.
Appendix A
Presentation of the instrument
Level meter readings
(ag-)i
I.TG: ——2001
Calculation example
Micrometer indication error
Micrometer indication error: 3=1A,-(z-)1×grid value=1.2×0.05ma=0.05:m
Table A.2 Horizontal standard compensation error
Average gain
Compensation difference=0.0%4=0.03/1
Standard, n
Line 4
Right 4
Horizontal directrix deviation:
: d=a-
(+)/2:
JIG 560—201
Table A.3 Horizontal directrix deviation
2 [5u- (5+b) /2.:
Table A.4, multi-target deviation error
multi-day target deviation error: take the larger value - the minimum value! × road value = 0.15 × 0.05 mm = 0.08 mm 56.62 Photoelectric collimator (field of view). The physical test steps are as follows 6.3.7.1 Focus the handle of the device under test in the α position. 4
.IJG 960—2001
6.3.7.2 Adjust the collimator to align with the device under test, place the collimator between the collimator and the device under test, and level it. 5.3.7.3 Adjust the foot of the autocollimator to the wheel so that it is lower than the first working surface of the collimator, read the horizontal position of the reflected image three times, and take the average value as 1. Rotate the collimator by 1°, i.e. P, aim the autocollimator at the second working surface of the collimator, read the crosshair position three times, and take the average value as 2. Then take the crosshair horizontal position of the autocollimator field of view for 2 times, and take the average value as α. Calculate the standard horizontal alignment position A according to the following formula: 4=-(a1)/2
6.3.7.4 Keep the autocollimator still, take the collimator away, and read the crosshair position of the level calibration device in the first position from the collimator (transmission reading!), and take the average value as . Put the instrument to be inspected in the second position, read the crosshair position three times, and take the average value as . Read the crosshair horizontal position of the autocollimator field of view for 2 times, and take the average value as . Calculate the horizontal alignment position according to the following formula: B=2u (b16) /2)
6.3.7.5 Calculate the deviation between the horizontal line under test and the standard horizontal line according to the following formula: C=RA
Note: The actual value of the error is also determined according to the different readings of the self-elevator used. (4)
6.3.7.6 Repeat the measurement three times and take the average value as the horizontal line error of the instrument (see Table A.3 in Appendix A). Other methods can also be used to calibrate the horizontal line error. The expanded uncertainty (=2) of the most important method should not be too large. 1/3 of the filling error, 6.3.8 Multiple H standard deviation from the standard error
Use a high-precision level (hereinafter referred to as the level) with no focusing error in principle as the standard for measurement. The specific calibration steps are as follows:
6.3.8.1 Place the level on the calibration table: Make the optical axis height of the level and the device to be inspected roughly the same, level them, and strictly adjust the micrometer to S.0. Adjust the level to infinity, observe the mark of the device to be inspected, and adjust the micrometer screw of the device to be inspected so that the horizontal thread of the mark coincides with the horizontal thread of the level scale plate. 6.3.8.2 Adjust the level to the near point, observe the national standard of the device under test, adjust the height and level of the level, and make the target horizontal line of the near point of the device under test coincide with the level scale plate, and repeat the above operation until the test device and the far and near moon mark of the level coincide. 6.3.8.3 Turn the focusing hand wheel of the level, aim at the 5m, 10m, 20m+3m, 50m moon mark in the test device in turn, and use the micrometer of the level to read the machine difference between the position of the objective measuring point and the position of 5m. This is a measurement, and the two measurements are measured and the average is calculated. The maximum difference is taken as the multi-day standard deviation error of the device under test. : (See Table A.4 in Appendix A) u
It is also possible to use other devices with an expanded uncertainty (point = 2) less than 1/3 of the standard of the device under test for detection. During arbitration verification, it must be based on the verification method detailed in this regulation. 6.4 Handling of verification results
After verification, the verification certificate of the level device that meets the requirements of this regulation shall be issued, and the corresponding grade shall be indicated. The device that fails the verification shall be issued with a verification failure notice, and the unqualified items shall be indicated. The inner page format of the verification certificate and the verification failure notice is shown in Appendix B
6.5 Verification cycle
JJG S(0 —20e
The verification cycle of the level verification device shall be determined according to its stability, environmental conditions, and frequency of use, and shall not exceed one and a half years at most.
Appendix A
Presentation of the instrument
Level meter readings
(ag-)i
I.TG: ——2001
Calculation example
Micrometer indication error
Micrometer indication error: 3=1A,-(z-)1×grid value=1.2×0.05ma=0.05:m
Table A.2 Horizontal standard compensation error
Average gain
Compensation difference=0.0%4=0.03/1
Standard, n
Line 4
Right 4
Horizontal directrix deviation:
: d=a-
(+)/2:
JIG 560—201
Table A.3 Horizontal directrix deviation
2 [5u- (5+b) /2.:
Table A.4, multi-target deviation error
multi-day target deviation error: take the larger value - the minimum value! × road value = 0.15 × 0.05 mm = 0.08 mm 56.605:m send: small light effect
Table A.2 Horizontal standard compensation error
Average gain
Compensation difference=0.0%4=0.03/1
I standard, n
Line 4
Da Shun 4
Right tilt 4
Horizontal standard deviation:
: d=a-
(+)/2:
JIG 560—201
Table A.3 Horizontal standard deviation
2 [5u- (5+b) /2.:
Table A.4, multi-target deviation error
Multi-day standard deviation error: take the larger value-minimum value! × road value=0.15×0.05mm=0.08mm56.605:m send: small light effect
Table A.2 Horizontal standard compensation error
Average gain
Compensation difference=0.0%4=0.03/1
I standard, n
Line 4
Da Shun 4
Right tilt 4
Horizontal standard deviation:
: d=a-
(+)/2:
JIG 560—201
Table A.3 Horizontal standard deviation
2 [5u- (5+b) /2.:
Table A.4, multi-target deviation error
Multi-day standard deviation error: take the larger value-minimum value! × road value=0.15×0.05mm=0.08mm56.6
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