JB/T 4278.10-1993 Rubber and plastic wire and cable test equipment verification method Spark test machine
Some standard content:
Machinery Industry Standard of the People's Republic of China
JB/T4278.10-1993
Verification method of rubber and plastic wire and cable testing instruments and equipment Spark testing machine
Issued on August 21, 1993
Ministry of Machinery Industry of the People's Republic of China
Implementation on October 1, 1993
Mechanical Industry Standard of the People's Republic of China
Verification method of rubber and plastic wire and cable testing instruments and equipment Spark testing machine
1 Subject content and scope of application
JB/T4278.10-1993
Replaces JB4278.10—86
ZB K13 002—88
This standard specifies the verification items and technical requirements, verification instruments, verification methods, verification results and processing of spark testing machines. This standard applies to the calibration of newly manufactured, obsolete, in-use and repaired spark testers. 2 Reference standards
JB/T4278.1 General principles for calibration methods of rubber and plastic wire and cable test instruments and equipment 3 Calibration items and technical requirements
3.1 High-voltage power supply
3.1.1 Spark testers are divided into power frequency spark testers and DC spark testers according to the high-voltage power supply they use. Their high-voltage power supplies are power frequency high-voltage power supply and DC high-voltage power supply respectively. One end of the power frequency high-voltage power supply is grounded, and the positive pole of the DC high-voltage power supply is grounded. The pulse branch factor of the DC high-voltage power supply does not exceed 5% of the output DC voltage.
3.1.2 The test voltage is indicated by an instrument directly connected to the output end of the high-voltage power supply or other suitable circuit. The relative error of the test voltage indication is ±5%.
3.2 Test electrode
3.2.1 The bottom of the test electrode can be made into a V\ shape or a \U\ shape. The effective width of the test electrode shall not be less than the maximum outer diameter of the test object plus 30mm. 3.2.2 The electrode is a bead chain or ring chain contact electrode made of metal, and the chain length should be greater than the depth of the bottom of the V or U shape. a. The diameter of the bead is 2.5mm, and the distance between two adjacent keys should not be greater than 5mm; the diameter of the bead is 5mm, and the distance between two adjacent chains should not be greater than 8mm. The distance between two adjacent beads on the bead string should not exceed 2.5mm. b. The ring is composed of a metal wire with a diameter greater than 0.8mm. The narrow side of the ring is not greater than 5mm. There are not less than 20 rings on each 100mm long ring chain.
c. The beads on the chain should be evenly distributed. The surface should be smooth and there should be no burrs that scratch the test product. Each section of the bead or ring should be flexible and can be wound. 3.3 The breakdown counter can accurately record the number of spark breakdowns. 3.4 Sensitivity
The sensitivity requirements of the spark tester, that is, when the artificial breakdown device is connected between the high-voltage power supply test electrode and the ground for inspection, the spark tester has a breakdown indication.
3.4.1 Normal high voltage power supply. Test voltage 3kV (effective voltage), when the spark gap of the artificial breakdown device is temporarily short-circuited, the stable current should not exceed 600μA.
3.4.2 DC high voltage power supply. Test voltage 5kV, when the spark gap of the artificial breakdown device is temporarily short-circuited, the stable current should not exceed 600μA.
3.5 Stability
3.5.1 At the highest nominal test voltage, check with the artificial breakdown device, and the number of times counted by the breakdown counter of the spark test machine is consistent with the actual number. 3.5.2 When the high voltage power supply is an industrial frequency high voltage power supply, a defect-free test piece with the maximum capacitance value should be placed between the electrodes when conducting this test. When there is no suitable test piece, a 500pF high voltage capacitor can be used instead. Approved by the Ministry of Machinery Industry on August 21, 1993
Implemented on October 1, 1993
3.6 Guarding Electrode
JB/T4278.10-1993
Both ends of the test electrode should have grounded guarding electrodes. The width of the guarding electrode shall not be less than the effective width of the test electrode, and the length shall not be less than 10mm. 4 Calibration Instruments
4.1 Vernier caliper 200mm, graduation value 0.02mm. 4.2 Steel tape measure 2m, graduation value 1mm.
4.3 Electrostatic voltmeter 1.5 level; or high input impedance measuring instrument, input impedance greater than 100MQ, actual measurement error less than 1.5%; or voltage transformer 1.0 level, AC voltmeter 0.5 level. 4.4 Artificial Breakdown Device
4.4.1 Artificial breakdown devices are divided into two types: those for sensitivity test and those for stability test. The artificial breakdown device used for stability test can be used safely under the highest nominal voltage of the spark test machine. 4.4.2 The artificial breakdown device consists of a metal plate and a metal needle constituting a high-voltage test electrode, a microammeter, and necessary current limiting impedance. 4.4.3 The metal plate and the metal needle make relative rotational motion, and the needle tip passes over the plate cycle once per second. When the power frequency high voltage power supply is used, the duration of each time is 0.0258; when the DC high voltage power supply is used, the duration of each time is 0.0005s. The gap between the metal plate and the metal needle is 0.25±0.05mm, and the gap is adjusted with a 0.25mm feeler gauge.
4.4.4 AC or DC microammeter, with appropriate range, is used to measure the short-circuit steady-state current when the power frequency high voltage power supply is 3kV, or to measure the short-circuit steady-state current when the DC high voltage power supply is 5kV. In order to limit the short-circuit steady-state current to less than 600μA, a current limiting impedance can be connected in series. Note: The current limiting resistor is a resistor, one end of which is grounded. 4.5 High-voltage capacitor 500pF, rated working voltage not less than the highest test voltage during the spark machine calibration. 4.6 General oscilloscope.
High-voltage capacitor with a capacitance not less than 0.047μF and a withstand voltage not less than 3kV. 5 Verification method
The inspection items and verification procedures of the spark machine are in accordance with Table 1. Table 1
General inspection
2 Test electrode inspection
Guard electrode inspection
Test voltage verification
Verification items
DC test voltage ripple factor measurement
6 Sensitivity test
Stability endurance test
5.2 General inspection
Factory verification
Verification after repair
Periodic verification
This verification item is only applicable to DC spark
5.2.1 The spark machine should have high-voltage power supply, test electrode, guard electrode, test voltage indicator, breakdown counting device, breakdown alarm device and other parts.
5.2.2 The outer shell of the spark test machine has obvious grounding terminals and grounding marks. Check whether the connection between the ground terminal of the high-voltage power supply and the ground terminal of the outer shell is good, and check the grounding condition of the spark test machine. 5.2.3 Safety protection interlock device inspection
The safety protection interlock device ensures that when the test electrode box is opened, the power supply is automatically cut off and the test electrode is automatically grounded. 5.3 Test electrode inspection
5.3.1 The bead chain (or ring chain) of the test electrode shall not be seriously short or seriously corroded. 5.3.2 Use a vernier caliper to check the effective width of the test electrode. The result shall comply with the provisions of Article 3.2.1. 2
JB/T4278.10-1993
5.3.3 Measure the distance between two adjacent chains, the relevant dimensions of the bead chain or ring chain, and check the surface conditions of the bead or ring distribution. The result shall comply with the provisions of Article 3.2.2.
5.3.4 Check the maximum speed of the test piece passing through the electrode 5.3.4.1 DC high voltage power supply
Use a steel tape measure to measure the effective length of the electrode. When the time for each point of the test piece to pass through the electrode is 0.05s, it will withstand 2.5 full cycles of the power supply voltage. Determine the maximum speed of the test piece passing through the electrode of the industrial spark tester according to formula (1). V=60.
-60·S.Hz
=1.20.103.S
Wherein, V linear speed, m/min;
S effective length of electrode, m;
Hz——power frequency, 50;
n——the number of full cycles of the power supply voltage that the test piece withstands, 2.5. 5.3.4.2 DC high voltage power supply
Use a steel tape measure to measure the effective length of the electrode. When the time for each point of the test object to pass through the electrode is 0.001$, the maximum speed of the test object passing through the electrode of the DC spark test machine is determined according to formula (2). V=60.
Wherein, V-maximum speed of the test object, m/min; S-effective length of the electrode, m.
5.4 Inspection of protective electrode
5.4.1 The protective electrode should be reliably connected to the shell. The bead chain (or ring chain) of the protective electrode shall not be seriously short or seriously corroded. 5.4.2 The width and length of the protective electrode shall be measured in accordance with Article 3.6. 5.S Test voltage verification
5.5.1 Industrial high-voltage power supply
5.5.1.1 The test voltage verification of the industrial frequency high-voltage power supply can use one of the following verification instruments: electrostatic voltmeter 1.5 level;
b. High input impedance voltage measuring instrument, the actual measurement deviation is less than 1.5%; voltage transformer 1.0 level, AC voltmeter 0.5 level. c
5.5.1.2 The high-voltage power supply is unloaded. Connect the calibration equipment between the high-voltage terminal of the high-voltage power supply and the ground, and calibrate each voltage value with digital graduation of the test voltage indicating instrument of 3kV and above. Each graduation value is calibrated twice, and the average is taken. The relative deviation of the test voltage indication calculated by the following formula should not exceed ±5%.
Where: ---Relative deviation of indication, %; YhV×100%
V,—Indicated voltage of the spark test machine, kV; V, calibration equipment reading, kV.
5.5.2 DC high-voltage power supply
5.5.2.1 The test voltage calibration of the DC high-voltage power supply can be carried out using one of the following calibration equipment; a. Electrostatic voltmeter, level 1.5;
JB/T4278.10-1993
b. High input impedance voltage measuring instrument, the actual measurement deviation is less than 1.5%. 5.5.2.2 The high-voltage power supply is unloaded. Connect the calibration equipment between the high voltage end of the high voltage power supply and the ground, and calibrate each voltage value with digital scale of the test voltage indicating instrument of 5kV and above. Calibrate each scale value twice and take the average value. The relative deviation of the test voltage indication calculated by the following formula should not exceed ±5%.
Where; r\--relative deviation of indication, %, Vh=V=×100%
V,-indicated voltage of DC spark tester, kV; V, calibration equipment reading, kV.
5.5.3 When the spark tester is calibrated periodically, if it is unconditionally calibrated to the highest nominal voltage value, the test voltage is allowed to be calibrated to not less than the highest voltage actually used by the spark tester. 5.6 Measurement of DC test voltage ripple factor
5.6.1 Test voltage no-load. One end of the 0.047μF high voltage capacitor is connected to the test electrode, and the other end is connected to the input end of the general oscilloscope. 5.6.2 Turn on the power supply of the DC spark tester. Increase the test voltage to about 1kV, and use a general oscilloscope to measure the peak-to-peak value of the test voltage Au, and the pulsating voltage B = Au/2.
5.6.3 Calculate the pulsating factor of the test voltage according to formula (5), and the result should comply with the provisions of Article 3.1.1. r=8/u×100%
Where: r——pulsating factor;
--pulsating voltage, V
u-nominal test voltage, V.
5.7 Sensitivity test
5.7.1 Power frequency high voltage power supply
5.7.1.1 Adjust the test voltage to 3kV. Connect the artificial breakdown device for sensitivity test between the high voltage terminal and the ground. Connect the current limiting impedance to limit the short-circuit steady-state current to less than 600μA. 5.7.1.2 Start the artificial breakdown device and rotate it 20 times. The number of times counted by the breakdown counter of the industrial spark machine should be consistent with the actual number of breakdowns. 5.7.2 DC high-voltage power supply
5.7.2.1 Adjust the test voltage to 5kV. Connect the artificial breakdown device for sensitivity test between the high-voltage terminal and the ground. Connect the current-limiting impedance in series to limit the short-circuit steady-state current to less than 600μA. 5.7.2.2 Start the artificial breakdown device and rotate it 20 times. The number of times counted by the breakdown counter of the DC spark test machine should be consistent with the actual number of breakdowns.
5.8 Stability test
5.8.1 Industrial high-voltage power supply
5.8.1.1 According to the specifications of the industrial frequency spark machine, place a defect-free test piece with the maximum capacitance value between the electrodes. The flange or sheath of the test piece should be made of PVC material, and its wire or armor layer should be grounded. If there is no suitable test piece, a 500pF high-voltage capacitor can be used instead. One end of the high-voltage capacitor is connected to the test electrode, and the other end is grounded. 5.8.1.2 A 500pF high-voltage capacitor should be connected between the high-voltage end and the ground. 5.8.1.3 An artificial breakdown device for stability test should be inserted between the high-voltage end and the ground. 5.8.1.4 Increase the test voltage to the highest rated voltage. 5.8.1.5 Start the artificial breakdown device and rotate it 20 times. The stability of the industrial spark tester should meet the requirements of Article 3.5.1. 5.8.1.6 Restart the artificial breakdown device and rotate it 20 times. During the rotation of the artificial breakdown device, adjust the test voltage from 3kV to the highest rated voltage up and down for 2 times continuously. The number of times counted by the breakdown counter of the industrial frequency spark tester should be consistent with the actual number of breakdowns. 5.B.1.7 When the industrial frequency spark tester is periodically calibrated, the stability test can be carried out by placing a test piece of the largest specification without defects between the electrodes at the highest voltage used by the spark tester. A
JB/T4278.10-1993
When the power frequency spark tester is calibrated periodically, the stability test does not comply with the provisions of 5.8.1.2. 5.8.1.8
5.8.2 DC high voltage power supply
5.8.2.1 Connect the artificial breakdown device for stability test between the high voltage terminal and the ground. Increase the test voltage to the highest nominal voltage. 5.8.2.2
Start the artificial breakdown device and rotate it 20 times. The stability of the DC spark machine shall meet the provisions of 3.5.1. 5.8.2.4 Restart the artificial breakdown device and rotate it 20 times. During the rotation of the artificial breakdown device, adjust the test voltage from 5kV to the highest nominal voltage up and down for 2 times continuously. The number of times the DC spark tester breakdown counter counts should be consistent with the actual number of breakdowns. Note: ① When conducting the tests of 5.7 and 5.8, the trigger signal should be disconnected to ensure that the power supply of the test transformer is not disconnected. When conducting the test of 5.7, the steel needle should be replaced for each test. The taper of the needle tip should not be greater than 60 degrees and the diameter should not be greater than 2mm, or an equivalent?
③ When conducting the test of 5.8, a thicker steel needle can be used to prevent the needle tip from melting, or an HB pencil lead can be used instead of the steel needle. 6 Processing of verification results
6.1 The verification cycle of the spark test machine shall not exceed one year. 6.2 A verification certificate shall be issued to spark test machines that have passed the verification, and a verification result notice shall be issued to those that have failed the verification. The verification certificate and verification result notice are shown in Appendix A and Appendix B of JB/T4278.1. Additional notes:
This standard was proposed and managed by the Shanghai Cable Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Shanghai Cable Research Institute of the Ministry of Machinery Industry and others. The main drafter of this standard is Yuan Baifen.
People's Republic of China
Mechanical Industry Standard
Rubber and plastic wire and cable test equipment verification method Spark test machine
JB/T 4278.10 - 1993
Published by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2 Shouti South Road, Beijing
Format 880×1230
Edition X, XX, 19XX
Printing 1-xXX
Postal Code 100044)
Sheet X/X
Number of words XXX,XXX
Printing X, XX, 19XX
Price XXX.XX Yuan
XX-XXX
Mechanical Industry Standard Service Network: http://www.JB.ac.cn182 Turn on the power supply of the DC spark tester. Increase the test voltage to about 1kV nominal, and use a general oscilloscope to measure the peak-to-peak value of the test voltage Au, and the pulsating voltage B = Au/2.
5.6.3 Calculate the pulsating factor of the test voltage according to formula (5), and the result should comply with the provisions of Article 3.1.1. r=8/u×100%
Where: r——pulsating factor;
--pulsating voltage, V
u-nominal test voltage, V.
5.7 Sensitivity test
5.7.1 Power frequency high voltage power supply
5.7.1.1 Adjust the test voltage to 3kV. Connect the artificial breakdown device for sensitivity test between the high voltage terminal and the ground. Connect the current limiting impedance to limit the short-circuit steady-state current to less than 600μA. 5.7.1.2 Start the artificial breakdown device and rotate it 20 times. The number of times counted by the breakdown counter of the industrial spark machine should be consistent with the actual number of breakdowns. 5.7.2 DC high-voltage power supply
5.7.2.1 Adjust the test voltage to 5kV. Connect the artificial breakdown device for sensitivity test between the high-voltage terminal and the ground. Connect the current-limiting impedance in series to limit the short-circuit steady-state current to less than 600μA. 5.7.2.2 Start the artificial breakdown device and rotate it 20 times. The number of times counted by the breakdown counter of the DC spark test machine should be consistent with the actual number of breakdowns.
5.8 Stability test
5.8.1 Industrial high-voltage power supply
5.8.1.1 According to the specifications of the industrial frequency spark machine, place a defect-free test piece with the maximum capacitance value between the electrodes. The flange or sheath of the test piece should be made of PVC material, and its wire or armor layer should be grounded. If there is no suitable test piece, a 500pF high-voltage capacitor can be used instead. One end of the high-voltage capacitor is connected to the test electrode, and the other end is grounded. 5.8.1.2 A 500pF high-voltage capacitor should be connected between the high-voltage end and the ground. 5.8.1.3 An artificial breakdown device for stability test should be inserted between the high-voltage end and the ground. 5.8.1.4 Increase the test voltage to the highest rated voltage. 5.8.1.5 Start the artificial breakdown device and rotate it 20 times. The stability of the industrial spark tester should meet the requirements of Article 3.5.1. 5.8.1.6 Restart the artificial breakdown device and rotate it 20 times. During the rotation of the artificial breakdown device, adjust the test voltage from 3kV to the highest rated voltage up and down for 2 times continuously. The number of times counted by the breakdown counter of the industrial frequency spark tester should be consistent with the actual number of breakdowns. 5.B.1.7 When the industrial frequency spark tester is periodically calibrated, the stability test can be carried out by placing a test piece of the largest specification without defects between the electrodes at the highest voltage used by the spark tester. A
JB/T4278.10-1993
When the power frequency spark tester is calibrated periodically, the stability test does not comply with the provisions of 5.8.1.2. 5.8.1.8
5.8.2 DC high voltage power supply
5.8.2.1 Connect the artificial breakdown device for stability test between the high voltage terminal and the ground. Increase the test voltage to the highest nominal voltage. 5.8.2.2
Start the artificial breakdown device and rotate it 20 times. The stability of the DC spark machine shall meet the provisions of 3.5.1. 5.8.2.4 Restart the artificial breakdown device and rotate it 20 times. During the rotation of the artificial breakdown device, adjust the test voltage from 5kV to the highest nominal voltage up and down for 2 times continuously. The number of times the DC spark tester breakdown counter counts should be consistent with the actual number of breakdowns. Note: ① When conducting the tests of 5.7 and 5.8, the trigger signal should be disconnected to ensure that the power supply of the test transformer is not disconnected. When conducting the test of 5.7, the steel needle should be replaced for each test. The taper of the needle tip should not be greater than 60 degrees and the diameter should not be greater than 2mm, or an equivalent?
③ When conducting the test of 5.8, a thicker steel needle can be used to prevent the needle tip from melting, or an HB pencil lead can be used instead of the steel needle. 6 Processing of verification results
6.1 The verification cycle of the spark test machine shall not exceed one year. 6.2 A verification certificate shall be issued to spark test machines that have passed the verification, and a verification result notice shall be issued to those that have failed the verification. The verification certificate and verification result notice are shown in Appendix A and Appendix B of JB/T4278.1. Additional notes:
This standard was proposed and managed by the Shanghai Cable Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Shanghai Cable Research Institute of the Ministry of Machinery Industry and others. The main drafter of this standard is Yuan Baifen.
People's Republic of China
Mechanical Industry Standard
Rubber and plastic wire and cable test equipment verification method Spark test machine
JB/T 4278.10 - 1993
Published by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2 Shouti South Road, Beijing
Format 880×1230
Edition X, XX, 19XX
Printing 1-xXX
Postal Code 100044)
Sheet X/X
Number of words XXX,XXX
Printing X, XX, 19XX
Price XXX.XX Yuan
XX-XXX
Mechanical Industry Standard Service Network: http://www.JB.ac.cn182 Turn on the power supply of the DC spark tester. Increase the test voltage to about 1kV nominal, and use a general oscilloscope to measure the peak-to-peak value of the test voltage Au, and the pulsating voltage B = Au/2.
5.6.3 Calculate the pulsating factor of the test voltage according to formula (5), and the result should comply with the provisions of Article 3.1.1. r=8/u×100%
Where: r——pulsating factor;
--pulsating voltage, V
u-nominal test voltage, V.
5.7 Sensitivity test
5.7.1 Power frequency high voltage power supply
5.7.1.1 Adjust the test voltage to 3kV. Connect the artificial breakdown device for sensitivity test between the high voltage terminal and the ground. Connect the current limiting impedance to limit the short-circuit steady-state current to less than 600μA. 5.7.1.2 Start the artificial breakdown device and rotate it 20 times. The number of times counted by the breakdown counter of the industrial spark machine should be consistent with the actual number of breakdowns. 5.7.2 DC high-voltage power supply
5.7.2.1 Adjust the test voltage to 5kV. Connect the artificial breakdown device for sensitivity test between the high-voltage terminal and the ground. Connect the current-limiting impedance in series to limit the short-circuit steady-state current to less than 600μA. 5.7.2.2 Start the artificial breakdown device and rotate it 20 times. The number of times counted by the breakdown counter of the DC spark test machine should be consistent with the actual number of breakdowns.
5.8 Stability test
5.8.1 Industrial high-voltage power supply
5.8.1.1 According to the specifications of the industrial frequency spark machine, place a defect-free test piece with the maximum capacitance value between the electrodes. The flange or sheath of the test piece should be made of PVC material, and its wire or armor layer should be grounded. If there is no suitable test piece, a 500pF high-voltage capacitor can be used instead. One end of the high-voltage capacitor is connected to the test electrode, and the other end is grounded. 5.8.1.2 A 500pF high-voltage capacitor should be connected between the high-voltage terminal and the ground. 5.8.1.3 An artificial breakdown device for stability test should be inserted between the high-voltage terminal and the ground. 5.8.1.4 Increase the test voltage to the highest rated voltage. 5.8.1.5 Start the artificial breakdown device and rotate it 20 times. The stability of the industrial spark tester should meet the requirements of Article 3.5.1. 5.8.1.6 Restart the artificial breakdown device and rotate it 20 times. During the rotation of the artificial breakdown device, adjust the test voltage from 3kV to the highest rated voltage up and down for 2 times in a row. The number of times counted by the breakdown counter of the industrial frequency spark tester should be consistent with the actual number of breakdowns. 5.B.1.7 When the industrial frequency spark tester is periodically calibrated, the stability test can be carried out by placing a test piece of the largest specification without defects between the electrodes at the highest voltage used by the spark tester. A
JB/T4278.10-1993
When the power frequency spark tester is calibrated periodically, the stability test does not comply with the provisions of 5.8.1.2. 5.8.1.8
5.8.2 DC high voltage power supply
5.8.2.1 Connect the artificial breakdown device for stability test between the high voltage terminal and the ground. Increase the test voltage to the highest nominal voltage. 5.8.2.2
Start the artificial breakdown device and rotate it 20 times. The stability of the DC spark machine shall meet the provisions of 3.5.1. 5.8.2.4 Restart the artificial breakdown device and rotate it 20 times. During the rotation of the artificial breakdown device, adjust the test voltage from 5kV to the highest nominal voltage up and down continuously twice. The number of times the DC spark tester breakdown counter counts should be consistent with the actual number of breakdowns. Note: ① When conducting the tests of 5.7 and 5.8, the trigger signal should be disconnected to ensure that the power supply of the test transformer is not disconnected. When conducting the test of 5.7, the steel needle should be replaced for each test. The taper of the needle tip should not be greater than 60 degrees and the diameter should not be greater than 2mm, or an equivalent?
③ When conducting the test of 5.8, a thicker steel needle can be used to prevent the needle tip from melting, or an HB pencil lead can be used instead of the steel needle. 6 Processing of verification results
6.1 The verification cycle of the spark test machine shall not exceed one year. 6.2 A verification certificate shall be issued to spark test machines that have passed the verification, and a verification result notice shall be issued to those that have failed the verification. The verification certificate and verification result notice are shown in Appendix A and Appendix B of JB/T4278.1. Additional notes:
This standard was proposed and managed by the Shanghai Cable Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Shanghai Cable Research Institute of the Ministry of Machinery Industry and others. The main drafter of this standard is Yuan Baifen.
People's Republic of China
Mechanical Industry Standard
Rubber and plastic wire and cable test equipment verification method Spark test machine
JB/T 4278.10 - 1993
Published by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2 Shouti South Road, Beijing
Format 880×1230
Edition X, XX, 19XX
Printing 1-xXX
Postal Code 100044)
Sheet X/X
Number of words XXX,XXX
Printing X, XX, 19XX
Price XXX.XX Yuan
XX-XXX
Mechanical Industry Standard Service Network: http://www.JB.ac.cn188 During the test, a thicker steel needle can be used to prevent the needle tip from melting, or an HB pencil lead can be used instead of the steel needle. 6 Handling of verification results
6.1 The verification cycle of the spark tester shall not exceed one year. 6.2 A verification certificate shall be issued to spark testers that pass the verification, and a verification result notice shall be issued to those that fail the verification. For the forms of the verification certificate and verification result notice, see Appendix A and Appendix B of JB/T4278.1. Additional notes:
This standard was proposed and managed by the Shanghai Cable Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Shanghai Cable Research Institute of the Ministry of Machinery Industry and others. The main drafter of this standard is Yuan Baifen.
People's Republic of China
Mechanical Industry Standard
Rubber and plastic wire and cable test equipment verification method Spark test machine
JB/T 4278.10 - 1993
Published by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2 Shouti South Road, Beijing
Format 880×1230
Edition X, XX, 19XX
Printing 1-xXX
Postal Code 100044)
Sheet X/X
Number of words XXX,XXX
Printing X, XX, 19XX
Price XXX.XX Yuan
XX-XXX
Mechanical Industry Standard Service Network: http://www.JB.ac.cn188 During the test, a thicker steel needle can be used to prevent the needle tip from melting, or an HB pencil lead can be used instead of the steel needle. 6 Handling of verification results
6.1 The verification cycle of the spark tester shall not exceed one year. 6.2 A verification certificate shall be issued to spark testers that pass the verification, and a verification result notice shall be issued to those that fail the verification. For the forms of the verification certificate and verification result notice, see Appendix A and Appendix B of JB/T4278.1. Additional notes:
This standard was proposed and coordinated by the Shanghai Cable Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Shanghai Cable Research Institute of the Ministry of Machinery Industry and others. The main drafter of this standard is Yuan Baifen.
People's Republic of China
Mechanical Industry Standard
Rubber and plastic wire and cable test equipment verification method Spark test machine
JB/T 4278.10 - 1993
Published by the Mechanical Science Research Institute
Printed by the Mechanical Science Research InstitutewwW.bzxz.Net
(No. 2 Shouti South Road, Beijing
Format 880×1230
Edition X, XX, 19XX
Printing 1-xXX
Postal Code 100044)
Sheet X/X
Number of words XXX,XXX
Printing X, XX, 19XX
Price XXX.XX Yuan
XX-XXX
Mechanical Industry Standard Service Network: http://www.JB.ac.cn18
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