Some standard content:
ICS 25.060.20
Machinery Industry Standard of the People's Republic of China
JB/T10034-1999
Grating angular displacement measuring system
Grating angular displacement measuring system1999-05-20 Issued
National Machinery and Land Administration
2000-01-01 Implementation
JB/T1C034-1999
This standard is revised on the basis of ZBJ42040-90 Grating angular displacement measuring system. The technical content of this standard is consistent with ZDJ42040-90, and only the relevant provisions have been re-edited. This standard will replace ZDJ42040-90 from the date of implementation. The non-standard appendix A, appendix B and appendix D are the appendixes of the standard. Appendix D of this standard is a reminder.
This standard was proposed by the National Technical Committee for Standardization and is under the jurisdiction of Chengdu Tool Research Institute. The main drafters of this standard are Ji, Qiao.
This standard was first issued in 1990.
Mechanical Industry Standard of the People's Republic of China
Grating angular displacement measurement system
Grating angular displacement measurement systemJBT10034-1999
Code 7.8142 040—90
This standard specifies the basic parameters, technical requirements and basic tests of the grating angular displacement measurement system [hereinafter referred to as the measurement system]. This standard is applicable to measurement systems with a resolution of 0.1″~120″. Referenced Standards
The provisions contained in the following standards become the provisions of this standard through reference in this standard. When this standard is published, the editions shown are valid. All standards will be finalized and the effects of using non-standard standards have been discussed. The possibility of using the latest editions of the following standards has been explored. GR 191—1990
G Baimen 6388—198!
G/T 6587.2-1986
GD/T 6587.3-1986
JB/T 6214—1992
3 Definitions
This standard uses the following definitions.
3.1 Grating angular displacement measurement system
Packaging screening mark
Transport packaging delivery mark
Electronic measuring instrument temperature test
Electronic pressure measuring instrument humidity test
Instrument non-conformity verification test and determination test [Exponential distribution] Guidelines Using the principle of generating light signals in front of the grating, a grating angular displacement sensor is developed to sense the angular displacement and use light to represent its value. The measurement system,
3.2 Error value
Measurement system error curve between the highest point and the lowest point. 3.3 Measurement system subdivision error
The light signal is divided by the measurement system into multiple frequency slices, and the error between the sub-divided doses is large. 4 Basic parameters
Basic: 4 Angle and its value are shown in Table L
Approved by the State Administration of Industry and Information Technology on May 20, 1999 and implemented on January 1, 2000
Majority name
Evaluation number
Response reading
JH/T10034-1999
0.1:0 2:0.5: 1;2:5: 10120:30:60:120J00:15025D,256:300:360r4mO:0),512:Mm;720:K01:1KJ0;[024:080;1440:1500180D:2M0;204R,2400,2500;3600;4096,5000 :54001;720k:81429(UU:J0D00:10800:125D0:12960,163R4:18000;21600:25920:324 00h:32768;36U0U:64KU1:6536:129600
First series
Second series
1:6:15:30:6
hto:1o1:2k:00o:500m
Note: The first series is used for precision measurement, and the second series is used for digital production control. 5 Technical requirements
5.1 Working conditions
5.1.1 The measuring system should count normally under the conditions of working environment temperature range of -45\ and relative humidity not more than 90%. 5.1, 2 The measuring system should have an error within ±s% and should count normally. 5.2 Appearance and function
5.2.1 The metal surface of the measuring system should not have defects such as rust, collision and layer shedding, and various signs and numbers should be correct and clear. 5.2.2 All tight parts should be firm and stable, and all moving parts should be flexible and stable without jamming and looseness. 5.2.3 The display, clearness, number and direction of the angle display and reference zero position of the measuring system should be normal. 5.3 Accuracy
The measuring system accuracy is divided into 10 levels, using the differential speed-speed value. Half is indicated by a "±" sign, see Table 2, Table 2
Indication variability The error of the measurement system should not be greater than the value specified in Table 3. Table 3
Resolution
0.1:0:2:.5
J:2:5:TO:20:30:60
Indication variability
5.5 Specifications
JB/T.10034—1999
Under room temperature conditions, the position indication stability in the measurement system is less than one pulse number, 5. 6.6.1 The leakage current between any terminal of the power socket and the housing should not exceed 3.5mA. 5.6.2 The insulation resistance between any terminal of the power socket and the housing should not be less than 5mA. 5.6.3 When the AC voltage is 1500V, the machine can withstand 1mV and shall not break down. 5.7 Anti-interferencebzxz.net
The electromagnetic compatibility of the test system shall not change by more than one unit under the influence of ten objects. 5.4 Reliability
The mean time between failures (MTBF) of the system shall be measured. 6 Basic test methods
6.1 Suitability test for working environment
The test is carried out in accordance with the provisions of IEC 6587.2/IEC 6587.3. 6.2 Electrical fluctuation test
. When the electrical fluctuation is 5%, the accuracy of the measured rate system shall be measured respectively, and the test shall meet the requirements of the corresponding level. 6.3 Appearance mutual use test
The test of appearance and feel shall be conducted. Physical test
Under the conditions of the performance of the various numerical measurement systems, the inspection shall be adopted. The uncertainty is less than one third or one half of the specified value of the system accuracy of the tested system. [When the accuracy of the tested system is less than 1/3 of the specified value, the test system is tested by comparison test within the whole circle, or by full combination (intercomparison method). The measurement points of the 1000-2 level measuring system shall be no less than 36 points, and the measurement points of the 3-7 level measuring system shall be no less than 12 points. In general, the square root method [Appendix A (Appendix of the standard)] is used to calculate the peak value of the error selection. When the error is selected, the total error method (Appendix A) is used to calculate the peak value of the error, and half of the peak value of the error is taken as the "±" standard. 6.5 Variability of indication value Test
Use high-precision detection system as the reference: measure any angle of the measured system 10 times in the same direction and take the maximum difference of the readings.
6.6 Rangeability test
Use high-precision angle measurement system as the reference, rotate the measured system clockwise and counterclockwise at a certain angle, and take the absolute value of the difference between the readings in the clockwise and counterclockwise directions at that point. 6. Stable change test
Under room temperature, after the measuring system is turned on, read the indicated value every 0.51, and take the indicated value change within 4 hours: 6.8 Safety test
6. 8.1 Leakage current test
For products with grounded lower housing, the test circuit shown in the red figure can be used. First, adjust the voltage K to 242V, then make the K,, K, switches and combinations to test the maximum full current.
6.8.2 Insulation resistance test
[T0034-1999
Insulation resistance test
Figure 1 Leakage current test circuit
Support workbench
Read the disconnection hole on the upper part
Use a 500V megohmmeter to apply voltage to the specified test part for 1min, and read the insulation resistance value. 6.8.3 Card resistance test
Apply a tumble current with a frequency of 50H2 and a voltage of 1500V between the primary side of the power transformer curtain (the input end should be short-circuited) and the external charger. There should be no breakdown within 1mm.
6.9 Reliability test
The system reliability is measured according to JB/T6214, and the fault number calculation plan is shown in Appendix B (standard appendix) 6.10 Anti-interference test
According to Appendix ℃ ( Standard appendix) becomes Appendix D (prompt appendix) retrograde: 7 Inspection Rules
7.1 Products can only leave the factory after passing the factory quality inspection. The factory inspection items include the contents of 5.2~5.6. 7.2 Products are as follows: In one of the cases, type inspection is required: the number of samples shall not be less than 3 sets. a) New product finalization appraisal:
b) Major changes in design:
Main infant craft method male modification:
Guanjian material science and technology special modification
:'s production room When the baby is born again after more than one year: the pregnancy will last for two years.
Qian: All technical requirements stipulated in the standard shall be inspected, which shall be regarded as type inspection. If any of the 3 type inspections fails to comply with the regulations, double sampling inspection shall be carried out; if If double sampling inspection is still not satisfactory, type inspection will not be allowed.
8 mark, packaging and storage
8.1 mark
8. 1. 1 quantification system, the corresponding mark:
) Manufacturing: Factory name: ||tt ||b) Product name;
c) Indicate the mark:
) Product grade:
) Product model or mark:
\Manufacture date or dust Production batch number. || tt | Cargo mark: packaging and shipping mark, packaging ball must comply with the relevant provisions of GB/T63BB and GD [9], in addition 8.2 Packaging
. 1. The installation of the spot measuring system should have good anti-casting, anti-photography and moisture-proof measures. 8.2.1 The installation of the measuring disk system should include the product certificate and instruction manual. Packing list and other random accessories and attachments
The test system should be stored at a temperature of 4U-+53, with an accuracy of not less than 90%, and if there is no cerebral corrosive air deficiency and ventilation is required, please return it to the country. , A1 total error method example
JB/T10034-1999
Appendix A
[Standard record]
The total error method and the sum of squares method are shown|| tt||Suppose the photodetection distance is 40" and the resolution is! Although the photometric system is damaged, assuming the measurement point effect is 6 points, the detection interval is 0
A1.1 long-term error test||tt ||Within the 3° range of the whole example, at each limited measurement point, 6 indication errors are detected, and the maximum peak point P. and the recording point A1.2 are measured for mid-cycle identification difference
Within the +0.S range of the maximum drop point P. and the strong valley point P, each tank is measured at a certain interval to find the peak point P and valley point P relative to the day and point P.
A1.3 points false prohibition test
In the +0.5r range of the peak point P and the valley point P, measure a point at a certain interval and find the mountain comparison P: ,. Larger peak point P, and valley point F,
A1.4 Accuracy meter screen
Accuracy expressed by total error method 4-connection formula (A1) calculation: 4( 4P-4P,2
In the formula: 4P-1, the indication error of the point; P, -P, the indication error of the point.
The same starting point should be used for the above determinations. A2 root sum of squares method indication value
A2.1 long-period error detection
Between the point and the A1.1 tree, the algebraic difference between the value and the valley value is 4A2.2 Subdivision error is determined
Select any three points within 360° of the network, measure the subdivision difference within 0.5 range of each point, take the maximum value as D, and calculate A2.3 accurately
The handsomeness 4 represented by the sum root method is calculated according to the formula [2] Vaz*+ ap:
B1 fault criterion
JE/T10034—1999
Appendix B
(Standard downgrade)
Fault calculation rules
When the observation system test does not meet the requirements of the technical requirements in Chapter 5, it will be a teaching failure. B1 calculation of the number of faults||tt| |a) The number of calculations that meet the fault criteria: b)) The number of errors needs to be calculated once each time; the repeated faults need to be calculated once: d) false positive, short circuit, open circuit, rollover Failures caused by poor contacts or components that are good or bad should be calculated once for each drink: e) If it is normal at room temperature and fails at high temperature, it should be calculated once: when the function of the damaged component is lost. , should be calculated once each time: g) The failure caused by the sharp effect of each component should be calculated once. B3 does not calculate the provisions of fault correction | Failure: Failure of components with life indicators when they exceed the specified life: failure caused by incorrect operation
Appendix C
(standard appendix)
Resistance Intrusive experiment!
C1 is on the same power grid as the measurement system, artificially adapt to the following interference (the interference source is more than 1m away from the grating digital display, except where there are regulations
a Use a 40A AC contactor , start and stop the 5~10kW electric motor once every 5mi, test 20 times: b. 2m away from the measurement system, use an electric welding machine for 20min: e) switch on and off the electric air jet, plug in the electric molten iron or use 6mm AC or DC The flashlight is closed 10 times: d) Using a 75A three-phase contactor, it can continuously switch off 30 times JE/T10034-1999
Appendix
(Appendix of the prompt)
Anti-interference Sex test
D1 power line low frequency temperature complex interference conduction sensitivity test low frequency annual banquet thousand interference source principle medical woman picture D1.
D1.2 low frequency repeated in the interference wave pattern||tt| |a) Low-frequency repetitive interference is added to the peak value of the AC voltage of the power line at a repetition rate of 100 cycles/group. 10: b) Each user group is composed of a reduced cosine full wave with a frequency of 100klIz, Bei Baoxu After reaching 1.5 cycles, it reaches half of the first half peak value;
) The low-level interference wave is divided into 30 levels according to the peak voltage of the first half-wave, and each level represents a 100V voltage; The output interference of the source is 1500: e) The voltage wrinkle of the interference wave under each repetition is shown in Figure D2. d | | tt | The wiring diagrams of down interference and common mode interference are shown in Figure D3 and Figure D4. | |tt | The friction type and the corresponding interference level, the beneficial mode interference level should not be less than 10, and the common mode interference should not be less than 25. Version: Yongtu
D2 power supply money high frequency conduction sensitivity test
n2 .1 Test Pregnancy Tour
Routine Network System
TIF Number
Adian Network
Dry Signal
Small Wine Container
"Operating performance monitoring equipment
L operating performance is slightly improved
The combination of a radiation rate signal generator or a radiation signal generator and a power amplifier, the output resistance of which is 50 . n2.2 Test wiring and test matchmaking
The test is wired according to Figure D5. The high-frequency 1-optimal signal generated by the signal source passes through the live wire of the power supply to the product under test, and the connection between the test product and the power line is random. Network, the tester should wait until the load in the network is returned to sub-foot and disconnected, so that the interference signal is added to the tester, signal source, cable 9
JB/T10034-1999
The coaxial cable plug should be connected coaxially, and its consistent impedance should be consistent. Run the inspection program under rated power, adjust the test signal source to increase its output level to 1V, and change the frequency within the range of 0.15~300M11z. First, scan the entire frequency band, and then select 10 short frequencies for the test. It is expected that the system frequency should be able to operate normally, and then note the type of fault and the sensitive power point. tt||Scan spot rate range
High radiosensitivity test
Carry out the inspection procedure under the rated voltage of the test sample, adjust the radio frequency signal generator, and the large flux will produce 015- at intervals around the test sample. 300MHz, [Vm T interference field strength, sweep the light in the entire frequency band, and then take 10 frequency points on the fluorescent meter D1 for testing. The measurement system should be able to operate normally. Otherwise, write down the fault category and the corresponding sensitive equipment. rate point.10 Anti-interference test
According to Appendix ℃ (standard appendix) to Appendix D (prompt appendix): 7 Inspection Rules
7.1 Products can only leave the factory after passing the factory quality inspection. Inspection items include contents from 5.2 to 5.6. 7.2 The product must undergo type inspection under one of the following circumstances: the number of samples shall not be less than 3 sets. a) New product finalization appraisal:
b) Major changes in design:
Main infant craft method male modification:
Guanjian material science and technology special modification
:'s production room When the baby is born again after more than one year: the normal baby will be delivered every two years.
Qian: All technical requirements stipulated in the standard shall be inspected, which shall be regarded as type inspection. If any of the 3 type inspection fails to meet the requirements of the regulations, a doubled sampling inspection shall be carried out; if If double sampling inspection is still not satisfactory, type inspection will not be allowed.
8 mark, packaging and storage
8.1 mark
8. 1. 1 quantification system, the corresponding mark:
) Manufacturing: Factory name: ||tt ||b) Product name;
c) Indicate the mark:
) Product grade:
) Product model or mark:
\Manufacture date or dust Production batch number. || tt | Cargo mark: packaging and shipping mark, packaging ball must comply with the relevant provisions of GB/T63BB and GD [9], in addition 8.2 Packaging
. 1. The installation of the spot measuring system should have good anti-casting, anti-photography and moisture-proof measures. 8.2.1 The installation of the measuring disk system should include the product certificate and instruction manual. Packing list and other random accessories and attachments
The test system should be stored at a temperature of 4U-+53, with an accuracy of not less than 90%, and if there is no cerebral corrosive air deficiency and ventilation is required, please return it to the country. , A1 Total Error Method Example
JB/T10034-1999
Appendix A
[Standard Record]
Total Error Method and Sum of Squares Method|| tt||Suppose the photometric system has a shooting distance of 40" and a resolution of ! If the measurement point effect is 6 points, the detection interval is 0
A1.1 long-term error test||tt ||Within the 3° range of the whole example, at each limited measurement point, 6 indication errors are detected, and the maximum peak point P. and the recording point A1.2 are measured for mid-cycle identification difference
Within the +0.S range of the maximum drop point P. and the strong valley point P, each tank is measured at a certain interval to find the peak point P and valley point P relative to the day and point P.
A1.3 points false prohibition test
In the +0.5r range of the peak point P and the valley point P, measure a point at a certain interval and find the mountain comparison P: ,. Larger peak point P, and valley point F,
A1.4 Accuracy meter screen
Accuracy expressed by total error method 4-connection formula (A1) calculation: 4( 4P-4P,2
In the formula: 4P-1, the indication error of the point; P, -P, the indication error of the point.
The same starting point should be used for the above determinations. A2 root sum of squares method indication value
A2.1 long-period error detection
Between the point and the A1.1 tree, the algebraic difference between the value and the valley value is 4A2.2 Subdivision error is determined
Select any three points within 360° of the network, measure the subdivision difference within 0.5 of each point, take the maximum value as D, and calculate A2.3 accurately
The handsomeness 4 represented by the sum root method is calculated according to the formula [2] Vaz*+ ap:
B1 fault criterion
JE/T10034—1999
Appendix B
(Standard reduction)
Fault calculation rules
When the observation system test does not meet the requirements in Chapter 5 of the technical requirements, it is a teaching failure. B1 calculation of the number of faults||tt| |a) The number of calculations that meet the fault criteria: b)) The number of errors needs to be calculated once each time; the repeated faults need to be calculated once: d) false positive, short circuit, open circuit, rollover Failures caused by poor contacts or components that are good or bad should be calculated once for each drink: e) If it is normal at room temperature and fails at high temperature, it should be calculated once: when the function of the damaged component is lost. , should be calculated once each time: g) The failure caused by each component's peak efficiency should be calculated once. B3 does not calculate the provisions of fault correction | Failure: Failure of components with life indicators when they exceed the specified life: failure caused by incorrect operation
Appendix C
(standard appendix)
Resistance Intrusive experiment!
C1 is on the same power grid as the measurement system, and artificially adapts to the following interference (the interference source is more than 1m away from the grating digital display, except where there are regulations
a Use a 40A AC contactor , start and stop the 5~10kW electric motor once every 5mi, test 20 times: b. 2m away from the measurement system, use an electric welding machine for 20min: e) switch on and off the electric air jet, plug in the electric molten iron or use 6mm AC or DC The flashlight is turned off 10 times: d) The 75A three-phase contact can be used to continuously reverse the interruption 30 times JE/T10034-1999
Appendix
(Appendix of the prompt)
Anti-interference Sex test
D1 power line low frequency temperature complex interference conduction sensitivity test low frequency annual banquet thousand interference source principle medical woman picture D1.
D1.2 low frequency repeated in the interference wave pattern||tt| |a) Low-frequency repetitive interference is added to the peak value of the AC voltage of the power line at a repetition rate of 100 cycles/group. 10: b) Each user group is composed of a reduced cosine full wave with a frequency of 100klIz, Bei Baoxu After reaching 1.5 cycles, it reaches half of the first half peak value;
) The low-level interference wave is divided into 30 levels according to the peak voltage of the first half-wave, and each level represents a 100V voltage; The output interference of the source is 1500: e) The voltage wrinkle of the interference wave under each repetition is shown in Figure D2. d | | tt | The wiring diagrams of down interference and common mode interference are shown in Figure D3 and Figure D4. | |tt | The friction type and the corresponding interference level, the beneficial mode interference level should not be less than 10, and the common mode interference should not be less than 25. Version: Yongtu
D2 power supply money high frequency conduction sensitivity test
n2 .1 Test Pregnancy Tour
Routine Network System
TIF Number
Adian Network
Dry Signal
Small Wine Container
"Operating performance monitoring equipment
L operating performance is slightly improved
The combination of a radiation rate signal generator or a radiation signal generator and a power amplifier, the output resistance of which is 50 . n2.2 Test wiring and test matchmaking
The test is wired according to Figure D5. The high-frequency 1-optimal signal generated by the signal source passes through the live wire of the power supply to the product under test, and the connection between the test product and the power line is random. Network, the tester should wait until the load in the network is returned to sub-foot and disconnected, so that the interference signal is added to the tester, signal source, cable 9
JB/T10034-1999
The coaxial cable plug should be connected coaxially, and its consistent impedance should be consistent. Run the inspection program under rated power, adjust the test signal source to increase its output level to 1V, and change the frequency within the range of 0.15~300M11z. First, scan the entire frequency band, and then select 10 short frequencies for testing. It is expected that the system frequency should work normally, and then note the type of fault and the sensitive power point. tt||Scan spot rate range
High radiosensitivity test
Carry out the inspection procedure under the rated voltage of the test sample, adjust the radio frequency signal generator, and the large flux will produce 015- at intervals around the test sample. 300MHz, [Vm T interference field strength, sweep the light in the entire frequency band, and then take 10 frequency points on the fluorescent meter D1 for testing. The measurement system should be able to operate normally. Otherwise, write down the fault category and the corresponding sensitive equipment. rate point.10 Anti-interference test
According to Appendix ℃ (standard appendix) to Appendix D (prompt appendix): 7 Inspection Rules
7.1 Products can only leave the factory after passing the factory quality inspection. Inspection items include contents from 5.2 to 5.6. 7.2 The product must undergo type inspection under one of the following circumstances: the number of samples shall not be less than 3 sets. a) New product finalization appraisal:
b) Major changes in design:
Main infant craft method male modification:
Guanjian material science and technology special modification
:'s production room When the baby is born again after more than one year: the pregnancy will last for two years.
Qian: All the technical requirements specified in the standard shall be inspected, which shall be considered as type inspection. If any of the 3 type inspections fails to meet the requirements, double sampling inspection shall be carried out; if If double sampling inspection is still not satisfactory, type inspection will not be allowed.
8 mark, packaging and storage
8.1 mark
8. 1. 1 quantification system, the corresponding mark:
) Manufacturing: Factory name: ||tt ||b) Product name;
c) Indicate the mark:
) Product grade:
) Product model or mark:
\Manufacture date or dust Production batch number. || tt | Cargo mark: packaging and shipping mark, packaging ball must comply with the relevant provisions of GB/T63BB and GD [9], in addition 8.2 Packaging
. 1. The installation of the spot measuring system should have good anti-casting, anti-photography and moisture-proof measures. 8.2.1 The installation of the measuring disk system should include the product certificate and instruction manual. Packing list and other random accessories and attachments
The test system should be stored at a temperature of 4U-+53, with an accuracy of not less than 90%, and if there is no cerebral corrosive air deficiency and ventilation is required, please return it to the country. , A1 Total Error Method Example
JB/T10034-1999
Appendix A
[Standard Record]
Total Error Method and Sum of Squares Method|| tt||Suppose the photometric system has a shooting distance of 40" and a resolution of ! If the measurement point effect is 6 points, the detection interval is 0
A1.1 long-term error test||tt ||Within the 3° range of the whole example, at each limited measurement point, 6 indication errors are detected, and the maximum peak point P. and the recording point A1.2 are measured for mid-cycle identification difference
Within the +0.S range of the maximum drop point P. and the strong valley point P, each tank is measured at a certain interval to find the peak point P and valley point P relative to the day and point P.
A1.3 points false prohibition test
In the +0.5r range of the peak point P and the valley point P, measure a point at a certain interval and find the mountain comparison P: ,. Larger peak point P, and valley point F,
A1.4 Accuracy meter screen
Accuracy expressed by total error method 4-connection formula (A1) calculation: 4( 4P-4P,2
In the formula: 4P-1, the indication error of the point; P, -P, the indication error of the point.
The same starting point should be used for the above determinations. A2 root sum of squares method indication value
A2.1 long-period error detection
Between the point and the A1.1 tree, the algebraic difference between the value and the valley value is 4A2.2 Subdivision error is determined
Select any three points within 360° of the network, measure the subdivision difference within 0.5 range of each point, take the maximum value as D, and calculate A2.3 accurately
The handsomeness 4 represented by the sum root method is calculated according to the formula [2] Vaz*+ ap:
B1 fault criterion
JE/T10034—1999
Appendix B
(Standard reduction)
Fault calculation rules
When the observation system test does not meet the requirements in Chapter 5 of the technical requirements, it is a teaching failure. B1 calculation of the number of faults||tt| |a) The number of calculations that meet the fault criteria: b)) The number of errors needs to be calculated once each time; the repeated faults need to be calculated once: d) false positive, short circuit, open circuit, rollover Failures caused by poor contacts or components that are good or bad should be calculated once for each drink: e) If it is normal at room temperature and fails at high temperature, it should be calculated once: when the function of the damaged component is lost. , should be calculated once each time: g) The failure caused by the sharp effect of each component should be calculated once. B3 does not calculate the provisions of fault correction | Failure: Failure of components with life indicators when they exceed the specified survival: failure caused by incorrect operation
Appendix C
(standard appendix)
Resistance Intrusive experiment!
C1 is on the same power grid as the measurement system, and artificially adapts to the following interference (the interference source is more than 1m away from the grating digital display, except where there are regulations
a Use a 40A AC contactor , start and stop the 5~10kW electric machine once every 5mi, test 20 times: b. 2m away from the measurement system, use an electric welding machine for 20min: e) switch on and off the electric air jet, plug in and out the electric molten iron or use 6mm AC or DC The flashlight is closed 10 times: d) Using a 75A three-phase contactor, it can continuously switch off 30 times JE/T10034-1999
Appendix
(Appendix of the prompt)
Anti-interference Sexual test
D1 power line low frequency temperature complex interference conduction sensitivity test low frequency annual banquet thousand interference source principle medical woman picture D1.
D1.2 low interest repeated in the interference wave pattern||tt| |a) Low-frequency repetitive interference is added to the peak value of the AC voltage of the power line at a repetition rate of 100 cycles/group. 10: b) Each user group is composed of a reduced cosine full wave with a frequency of 100klIz, Bei Baoxu After reaching 1.5 cycles, it reaches half of the first half peak value;
) The low-level interference wave is divided into 30 levels according to the peak voltage of the first half-wave, and each level represents a voltage of 100V; The output interference of the source is 1500: e) The voltage wrinkle of the interference wave under each repetition is shown in Figure D2. d | | tt | The wiring diagrams of down interference and common mode interference are shown in Figure D3 and Figure D4. | |tt | The friction type and the corresponding interference level, the beneficial mode interference level should not be less than 10, and the common mode interference should not be less than 25. Version: Yongtu
D2 power supply money high frequency conduction sensitivity test
n2 .1 Test Pregnancy Tour
Routine Network System
TIF Number
Adian Network
Dry Signal
Small Wine Container
"Operating performance monitoring equipment
L operating performance is slightly improved
The combination of a radiation rate signal generator or a radiation signal generator and a power amplifier, the output resistance of which is 50 . n2.2 Test wiring and test matchmaking
The test is wired according to Figure D5. The high-frequency 1-optimal signal generated by the signal source passes through the live wire of the power supply to the product under test, and the connection between the test product and the power line is random. Network, the tester should wait until the load in the network is returned to sub-foot and disconnected, so that the interference signal is added to the tester, signal source, cable 9
JB/T10034-1999
The coaxial cable plug should be connected coaxially, and its consistent impedance should be consistent. Run the inspection program under rated power, adjust the test signal source to increase its output level to 1V, and change the frequency within the range of 0.15~300M11z. First, scan the entire frequency band, and then select 10 short frequencies for testing. It is expected that the system frequency should work normally, and then note the type of fault and the sensitive power point. tt||Scan spot rate range
High radiosensitivity test
Carry out the inspection procedure under the rated voltage of the test sample, adjust the radio frequency signal generator, and the large flux will produce 015- at intervals around the test sample. 300MHz, [Vm T interference field strength, sweep the light in the entire frequency band, and then take 10 frequency points on the fluorescent meter D1 for testing. The measurement system should be able to operate normally. Otherwise, write down the fault category and the corresponding sensitive equipment. rate point.2 Products must undergo type inspection under one of the following circumstances: the number of samples is not less than 3 sets. a) New product finalization appraisal:
b) Major changes in design:
Main infant craft method male modification:
Guanjian material science and technology special modification
:'s production room When the baby is born again after more than one year: the normal baby will be delivered every two years.
Qian: All the technical requirements specified in the standard shall be inspected, which shall be considered as type inspection. If any of the 3 type inspections fails to meet the requirements, double sampling inspection shall be carried out; if If double sampling inspection is still not satisfactory, type inspection will not be allowed.
8 mark, packaging and storage
8.1 mark
8. 1. 1 quantification system, the corresponding mark:
) Manufacturing: Factory name: ||tt ||b) Product name;
c) Indicate the mark:
) Product grade:
) Product model or mark:
\Manufacture date or dust Production batch number. || tt | Cargo mark: packaging and shipping mark, packaging ball must comply with the relevant provisions of GB/T63BB and GD [9], in addition 8.2 Packaging
. 1. The installation of the spot measuring system should have good anti-casting, anti-photography and moisture-proof measures. 8.2.1 The installation of the measuring disk system should include the product certificate and instruction manual. Packing list and other random accessories and attachments
The test system should be stored at a temperature of 4U-+53, with an accuracy of not less than 90%, and if there is no cerebral corrosive air deficiency and ventilation is required, please return it to the country. , A1 total error method example
JB/T10034-1999
Appendix A
[Standard record]
The total error method and the sum of squares method are shown|| tt||Suppose the photodetection distance is 40" and the resolution is! Although the photometric system is damaged, assuming the measurement point effect is 6 points, the detection interval is 0
A1.1 long-term error test||tt ||Within the 3° range of the whole example, at each limited measurement point, 6 indication errors are detected, and the maximum peak point P. and the recording point A1.2 are measured for mid-cycle identification difference
Within the +0.S range of the maximum drop point P. and the strong valley point P, each tank is measured at a certain interval to find the peak point P and valley point P relative to the day and point P.
A1.3 points false prohibition test
In the +0.5r range of the peak point P and the valley point P, measure a point at a certain interval and find the mountain comparison P: ,. Larger peak point P, and valley point F,
A1.4 Accuracy meter screen
Accuracy expressed by total error method 4-connection formula (A1) calculation: 4( 4P-4P,2
In the formula: 4P-1, the indication error of the point; P, -P, the indication error of the point.
The same starting point should be used for the above determinations. A2 root sum of squares method indication value
A2.1 long-period error detection
Between the point and the A1.1 tree, the algebraic difference between the value and the valley value is 4A2.2 Subdivision error is determined
Select any three points within 360° of the network, measure the subdivision difference within 0.5 range of each point, take the maximum value as D, and calculate A2.3 accurately
The handsomeness 4 represented by the sum root method is calculated according to the formula [2] Vaz*+ ap:
B1 fault criterion
JE/T10034—1999
Appendix B
(Standard reduction)
Fault calculation rules
When the observation system test does not meet the requirements in Chapter 5 of the technical requirements, it is a teaching failure. B1 calculation of the number of faults||tt| |a) The number of calculations that meet the fault criteria: b)) The number of errors needs to be calculated once each time; the repeated faults need to be calculated once: d) false positive, short circuit, open circuit, rollover Failures caused by poor contacts or components that are good or bad should be calculated once for each drink: e) If it is normal at room temperature and fails at high temperature, it should be calculated once: when the function of the damaged component is lost. , should be calculated once each time: g) The failure caused by each component's peak efficiency should be calculated once. B3 does not calculate the provisions of fault correction | Failure: Failure of components with life indicators when they exceed the specified life: failure caused by incorrect operation
Appendix C
(standard appendix)
Resistance Intrusive experiment!
C1 is on the same power grid as the measurement system, artificially adapt to the following interference (the interference source is more than 1m away from the grating digital display, except where there are regulations
a Use a 40A AC contactor , start and stop the 5~10kW electric machine once every 5mi, test 20 times: b. 2m away from the measurement system, use an electric welding machine for 20min: e) switch on and off the electric air jet, plug in and out the electric molten iron or use 6mm AC or DC The flashlight is closed 10 times: d) Using a 75A three-phase contactor, it can continuously switch off 30 times JE/T10034-1999
Appendix
(Appendix of the prompt)
Anti-interference Sexual test
D1 power line low frequency temperature complex interference conduction sensitivity test low frequency annual banquet thousand interference source principle medical woman picture D1.
D1.2 low interest repeated in the interference wave pattern||tt| |a) Low-frequency repetitive interference is added to the peak value of the AC voltage of the power line at a repetition rate of 100 cycles/group. 10: b) Each user group is composed of a reduced cosine full wave with a frequency of 100klIz, Bei Baoxu After reaching 1.5 cycles, it reaches half of the first half peak value;
) The low-level interference wave is divided into 30 levels according to the peak voltage of the first half-wave, and each level represents a voltage of 100V; The output interference of the source is 1500: e) The voltage wrinkle of the interference wave under each repetition is shown in Figure D2. d | | tt | The wiring diagrams of down interference and common mode interference are shown in Figure D3 and Figure D4. | |tt | The friction type and the corresponding interference level, the beneficial mode interference level should not be less than 10, and the common mode interference should not be less than 25. Version: Yongtu
D2 power supply money high frequency conduction sensitivity test
n2 .1 Test Pregnancy Tour
Routine Network System
TIF Number
Adian Network
Dry Signal
Small Wine Container
"Operating performance monitoring equipment
L operating performance is slightly improved
The combination of a radiation rate signal generator or a radiation signal generator and a power amplifier, the output resistance of which is 50 . n2.2 Test wiring and test matchmaking
The test is wired according to Figure D5. The high-frequency 1-optimal signal generated by the signal source passes through the live wire of the power supply to the product under test, and the connection between the test product and the power line is random. Network, the tester should wait until the load in the network is returned to sub-foot and disconnected, so that the interference signal is added to the tester, signal source, cable 9
JB/T10034-1999
The coaxial cable plug should be connected coaxially, and its consistent impedance should be consistent. Run the inspection program under rated power, adjust the test signal source to increase its output level to 1V, and change the frequency within the range of 0.15~300M11z. First, scan the entire frequency band, and then select 10 short frequencies for testing. It is expected that the system frequency should work normally, and then note the type of fault and the sensitive power point. tt||Scan spot rate range
High radiosensitivity test
Carry out the inspection procedure under the rated voltage of the test sample, adjust the radio frequency signal generator, and the large flux will produce 015- at intervals around the test sample. 300MHz, [Vm T interference field strength, sweep the light in the entire frequency band, and then take 10 frequency points on the fluorescent meter D1 for testing. The measurement system should be able to operate normally. Otherwise, write down the fault category and the corresponding sensitive equipment. rate point.2 Products must undergo type inspection under one of the following circumstances: the number of samples is not less than 3 sets. a) New product finalization appraisal:
b) Major changes in design:
Main infant craft method male modification:
Guanjian material science and technology special modification
:'s production room When the baby is born again after more than one year: the normal baby will be delivered every two years.
Qian: All the technical requirements specified in the standard shall be inspected, which shall be considered as type inspection. If any of the 3 type inspections fails to meet the requirements, double sampling inspection shall be carried out; if If double sampling inspection is still not satisfactory, type inspection will not be allowed.
8 mark, packaging and storage
8.1 mark
8. 1. 1 quantification system, the corresponding mark:
) Manufacturing: Factory name: ||tt ||b) Product name;
c) Indicate the mark:
) Product grade:
) Product model or mark:
\Manufacture date or dust Production batch number. || tt | Cargo mark: packaging and shipping mark, packaging ball must comply with the relevant provisions of GB/T63BB and GD [9], in addition 8.2 Packaging
. 1. The installation of the spot measuring system should have good anti-casting, anti-photography and moisture-proof measures. 8.2.1 The installation of the measuring disk system should include the product certificate and instruction manual. Packing list and other random accessories and attachments
The test system should be stored at a temperature of 4U-+53, with an accuracy of not less than 90%, and if there is no cerebral corrosive air deficiency and ventilation is required, please return it to the country. , A1 total error method example
JB/T10034-1999
Appendix A
[Standard record]
The total error method and the sum of squares method are shown|| tt||Suppose the photometric system has a shooting distance of 40" and a resolution of ! If the measurement point effect is 6 points, the detection interval is 0
A1.1 long-term error test||tt ||Within the 3° range of the whole example, at each limited measurement point, 6 indication errors are detected, and the maximum peak point P. and the recording point A1.2 are measured for mid-cycle identification difference
Within the +0.S range of the maximum drop point P. and the strong valley point P, each tank is measured at a certain interval to find the peak point P and valley point P relative to the day and point P.
A1.3 points false prohibition test
In the +0.5r range of the peak point P and the valley point P, measure a point at a certain interval and find the mountain comparison P: ,. Larger peak point P, and valley point F,
A1.4 Accuracy meter screen
Accuracy expressed by total error method 4-connection formula (A1) calculation: 4( 4P-4P,2
In the formula: 4P-1, the indication error of the point; P, -P, the indication error of the point.
The same starting point should be used for the above determinations. A2 root sum of squares method indication value
A2.1 long-period error detection
Between the point and the A1.1 tree, the algebraic difference between the value and the valley value is 4A2.2 Subdivision error is determined
Select any three points within 360° of the network, measure the subdivision difference within 0.5 range of each point, take the maximum value as D, and calculate A2.3 accurately
The handsomeness 4 represented by the sum root method is calculated according to the formula [2] Vaz*+ ap:
B1 fault criterion
JE/T10034—1999
Appendix B
(Standard reduction)
Fault calculation rules
When the observation system test does not meet the requirements in Chapter 5 of the technical requirements, it is a teaching failure. B1 calculation of the number of faults||tt| |a) The number of calculations that meet the fault criteria: b)) The number of errors needs to be calculated once each time; the repeated faults need to be calculated once: d) false positive, short circuit, open circuit, rollover Failures caused by poor contacts or components that are good or bad should be calculated once for each drink: e) If it is normal at room temperature and fails at high temperature, it should be calculated once: when the function of the damaged component is lost. , should be calculated once each time: g) The failure caused by each component's peak efficiency should be calculated once. B3 does not calculate the provisions of fault correction | Failure: Failure of components with life indicators when they exceed the specified life: failure caused by incorrect operation
Appendix C
(standard appendix)
Resistance Intrusive experiment!
C1 is on the same power grid as the measurement system, artificially adapt to the following interference (the interference source is more than 1m away from the grating digital display, except where there are regulations
a Use a 40A AC contactor , start and stop the 5~10kW electric motor once every 5mi, test 20 times: b. 2m away from the measurement system, use an electric welding machine for 20min: e) switch on and off the electric air jet, plug in the electric molten iron or use 6mm AC or DC The flashlight is turned off 10 times: d) The 75A three-phase contact can be used to continuously reverse the interruption 30 times JE/T10034-1999
Appendix
(Appendix of the prompt)
Anti-interference Sex test
D1 power line low frequency temperature complex interference conduction sensitivity test low frequency annual banquet thousand interference source principle medical woman picture D1.
D1.2 low frequency repeated in the interference wave pattern||tt| |a) Low-frequency repetitive interference is added to the peak value of the AC voltage of the power line at a repetition rate of 100 cycles/group. 10: b) Each user group is composed of a reduced cosine full wave with a frequency of 100klIz, Bei Baoxu After reaching 1.5 cycles, it reaches half of the first half peak value;
) The low-level interference wave is divided into 30 levels according to the peak voltage of the first half-wave, and each level represents a voltage of 100V; The output interference of the source is 1500: e) The voltage wrinkle of the interference wave under each repetition is shown in Figure D2. d | | tt | The wiring diagrams of down interference and common mode interference are shown in Figure D3 and Figure D4. | |tt | The friction type and the corresponding interference level, the beneficial mode interference level should not be less than 10, and the common mode interference should not be less than 25. Version: Yongtu
D2 power supply money high frequency conduction sensitivity test
n2 .1 Test Pregnancy Tour
Routine Network System
TIF Number
Adian Network
Dry Signal
Small Wine Container
"Operating performance monitoring equipment
L operating performance is slightly improved
The combination of a radiation rate signal generator or a radiation signal generator and a power amplifier, the output resistance of which is 50 . n2.2 Test wiring and test matchmaking
The test is wired according to Figure D5. The high-frequency 1-optimal signal generated by the signal source passes through the live wire of the power supply to the product under test, and the connection between the test product and the power line is random. Network, the tester should wait until the load in the network is returned to sub-foot and disconnected, so that the interference signal is added to the tester, signal source, cable 9
JB/T10034-1999
The coaxial cable plug should be connected coaxially, and its consistent impedance should be consistent. Run the inspection program under rated power, adjust the test signal source to increase its output level to 1V, and change the frequency within the range of 0.15~300M11z. First, scan the entire frequency band, and then select 10 short frequencies for testing. It is expected that the system frequency should work normally, and then note the type of fault and the sensitive power point. tt||Scan spot rate range
High radiosensitivity test
Carry out the inspection procedure under the rated voltage of the test sample, adjust the radio frequency signal generator, and the large flux will produce 015- at intervals around the test sample. 300MHz, [Vm T interference field strength, sweep the light in the entire frequency band, and then take 10 frequency points on the fluorescent meter D1 for testing. The measurement system should be able to operate normally. Otherwise, write down the fault category and the corresponding sensitive equipment. rate point.a), 6), center, d), e), and the markings for receiving and shipping: the markings for packaging and transportation, and the markings for packaging shall comply with the relevant provisions of GB/T63BB and GD[9[. 8.2 Packaging
In addition. 1 The installation of the measuring system shall have good anti-fouling, anti-fouling and moisture-proof measures. 8.2.1 The installation of the measuring system shall also include product certificates and instructions for use. Packing list and other random items and attachments 3
The measurement system should be stored in the temperature 4U-+53, the rejection error is not less than 90%, there is no corrosive gas shortage and please ventilate the interior, A1 Total error method example
JB/T10034-1999
Appendix A
[Standard Record]
Total error method and square root method are shown in the figure
Take the optical measurement system with a shooting distance of 40", and a resolution of! Assume that the measurement points are 6 points, then the detection interval is 0
A1.1 Long-term error verification
In the whole example Within the range of +0.5r of the peak point P and the valley point P, measure one point at a certain interval to find the peak point P6 and the valley point P7 that are larger than the peak point P6.
A1.3 Error detection
Within the range of +0.5r of the peak point P and the valley point P, measure one point at a certain interval to find the peak point P6 and the valley point P7 that are larger than the peak point P6.
A1.4 Accuracy meter
Accuracy expressed by total error method is calculated by direct formula (A1): 4(4P-4P,2
Where: 4P is the indication error of point P,-P, the indication error of point P.
The above determinations should all use the same starting value. A2 Square root method indication
A2.1 Long period error verification
The algebraic difference between the value and the valley value of point A1.1 is 4A2.2 Subdivision error determination
Select any three points within 360° of the grid, and measure the subdivision error within 0.5 range of each point. Take the maximum value D, A2.3 Accurate calculation
Accuracy expressed by square root method is calculated by formula [2) Vaz*+ ap:
B1 Fault judgment criteria
JE/T10034—1999
Appendix B
(Standard downgrade)
Fault calculation rules
When the telemetering system test does not meet the requirements of the technical requirements in Chapter 5, it is a fault. B1 Provisions for calculating the number of faults
a) Calculate the number of faults that meet the fault judgment criteria: b) Calculate once for each error in the number; for repeated faults, calculate once for each error: d) Caused by false alarms, short circuits, open circuits, poor contact or intermittent components, etc. Each failure needs to be calculated once: e) A failure that is normal at room temperature but occurs at high temperature should be calculated once: When a component that can be switched loses its function, it should be calculated once each time: g) A failure caused by each component spike should be calculated once. B3 does not calculate the provisions for improved interference.
a) A failure caused by failure to meet the working conditions and test methods specified in the standard: A failure caused by components with life indicators when their life exceeds the specified life: A failure caused by core operating errors
Appendix C
(Appendix to the standard)
Anti-interference test!
C1 On the same power grid as the measuring system, artificially create the following interferences (the interference source is more than 1m away from the grating digital display, except for those specified
a Use 40A AC contactor, start and stop 5~10kW electric effect machine once every 5mi, test 20 times; b Use electric welding machine to weld for 20min at a distance of 2m from the measuring system; e) Switch on and off the electric fan, plug and unplug the electric welding iron or use 6mm AC and DC hand-held pin to close 10 times; d) Use 75A three-way AC contactor to reverse and break continuously for 30 times JE/T10034—1999
Appendix
(Suggested Appendix)
Anti-interference test
D1 Power line low frequency complex interference conduction sensitivity test Low frequency interference source principle Figure D1.
D1.2 Low frequency repetitive interference wave shape
a) The low frequency repetitive interference is added to the peak value of the AC voltage of the power line with a repetition frequency of 100 cycles/group. b) Each group is composed of a minus cosine oscillation wave with a frequency of 100kΩ. After the envelope reaches 1.5 cycles, it reaches half of the first half-peak value;
) The low frequency repetitive interference wave is divided into 30 levels according to the peak voltage of the first half wave, and each level represents a voltage of 100V; the output impedance of the low frequency repetitive interference source is 1500: e) The voltage shape of each repetitive interference wave is shown in Figure D2. d
D1.3 Test wiring diagram and test steps
The test system should be tested under the condition of -10%, -15% of the power supply voltage change. The differential mode interference and common mode interference wiring diagrams are shown in Figure D3 and Figure D4.
JB/T10034—1999
Test pair, adjust the output voltage of the low-frequency repetitive interference source, and gradually increase the differential mode and common mode interference levels. When the system cannot work normally: record the type of interference and the corresponding interference level. The differential mode interference level should not be less than 10, and the common mode interference should not be less than 25.
D2 Power supply high frequency conduction sensitivity test
n2.1 Test signal
TIF number||tt ||Adian network
Dry-pick signal
Small wine container
"Performance monitoring equipment
LPerformance monitoring equipment
Emitting frequency signal generator or a combination of a measuring signal generator and a power amplifier, the output impedance of which is 50Ω. n2.2 Test wiring and test medium
The test is wired as shown in Figure D5. The high-frequency 1-pin signal generated by the signal source is passed through the power line to the product under test. A network is connected between the test product and the power line. The test acid leaf should be equal Disconnect the load in the network and add the interference signal to the test product. The signal source and the cable 9
JB/T10034—1999
coaxial line plug should be coaxially connected, and their impedance should be consistent. The test product runs the inspection program at rated voltage, adjusts the test signal source, increases its output level to 1V, and changes the frequency within the range of 0.15~300M11z. First scan the entire frequency band, and then select 10 short frequencies according to Table 1 for testing. The measured frequency should be able to Power supply
Scanning frequency range
High-rated radio frequency sensitivity test
Perform the inspection procedure under the rated voltage of the test product, adjust the RF signal generator, generate a 0.15-300MHz, [Vm interference field strength around the test product, and scan the light in the entire frequency band. Then use the fluorescent meter to take 10 frequency points for testing. The measurement system should be able to work normally, otherwise record the type of fault and the corresponding sensitive frequency point.a), 6), center, d), e), and the markings for receiving and shipping: the markings for packaging and transportation, and the markings for packaging shall comply with the relevant provisions of GB/T63BB and GD[9[. 8.2 Packaging
In addition. 1 The installation of the measuring system shall have good anti-fouling, anti-fouling and moisture-proof measures. 8.2.1 The installation of the measuring system shall also include product certificates and instructions for use. Packing list and other random items and attachments 3
The measurement system should be stored in the temperature 4U-+53, the rejection error is not less than 90%, there is no corrosive gas shortage and please ventilate the interior, A1 Total error method example
JB/T10034-1999
Appendix A
[Standard Record]
Total error method and square root method are shown in the figure
Take the optical measurement system with a shooting distance of 40", and a resolution of! Assume that the measurement points are 6 points, then the detection interval is 0
A1.1 Long-term error verification
In the whole example Within the range of +0.5r of the peak point P and the valley point P, measure one point at a certain interval to find the peak point P6 and the valley point P7 that are larger than the peak point P6.
A1.3 Error detection
Within the range of +0.5r of the peak point P and the valley point P, measure one point at a certain interval to find the peak point P6 and the valley point P7 that are larger than the peak point P6.
A1.4 Accuracy meter
Accuracy expressed by total error method is calculated by direct formula (A1): 4(4P-4P,2
Where: 4P is the indication error of point P,-P, the indication error of point P.
The above determinations should all use the same starting value. A2 Square root method indication
A2.1 Long period error verification
The algebraic difference between the value and the valley value of point A1.1 is 4A2.2 Subdivision error determination
Select any three points within 360° of the grid, and measure the subdivision error within 0.5 range of each point. Take the maximum value D, A2.3 Accurate calculation
Accuracy expressed by square root method is calculated by formula [2) Vaz*+ ap:
B1 Fault judgment criteria
JE/T10034—1999
Appendix B
(Standard downgrade)
Fault calculation rules
When the telemetering system test does not meet the requirements of the technical requirements in Chapter 5, it is a fault. B1 Provisions for calculating the number of faults
a) Calculate the number of faults that meet the fault judgment criteria: b) Calculate once for each error in the number; for repeated faults, calculate once for each error: d) Caused by false alarms, short circuits, open circuits, poor contact or intermittent components, etc. Each failure needs to be calculated once: e) A failure that is normal at room temperature but occurs at high temperature should be calculated once: When a component that can be switched loses its function, it should be calculated once each time: g) A failure caused by each component spike should be calculated once. B3 does not calculate the provisions for improved interference.
a) A failure caused by failure to meet the working conditions and test methods specified in the standard: A failure caused by components with life indicators when their life exceeds the specified life: A failure caused by core operating errors
Appendix C
(Appendix to the standard)
Anti-interference test!
C1 On the same power grid as the measuring system, artificially create the following interferences (the interference source is more than 1m away from the grating digital display, except for those specified
a Use 40A AC contactor, start and stop 5~10kW electric effect machine once every 5mi, test 20 times; b Use electric welding machine to weld for 20min at a distance of 2m from the measuring system; e) Switch on and off the
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