SJ 20230-1993 BJ2951A (JS-5A) transistor HFE tester verification procedures SJ20230-1993 standard download decompression password: www.bzxz.net

Military Standard of Electronic Industry of the People's Republic of China FL0150
SJ20230-93
Verification regulation of niodelBJ2951A(JS-- SA) transistor HFE tester1993-0209 Issued
China Electronics Industry Corporation
1993-0501 Implementation
Military Standard of Electronic Industry of the People's Republic of China BJ2951A(JS-5A) transistor HFE tester
Verification regulation of modelBJ2951A(JS-5A)transistorHretester1 Range
1.1 Subject content
SJ20230--93
This verification procedure specifies the verification cases, verification items, verification methods, verification result processing and verification period of BJ2951A (JS-5A) type crystal triode Hee tester. 1.2 Scope of application
This verification procedure is applicable to the verification of BJ2951A (JS-5A) type crystal triode Hpe tester.
2 Reference documents
There are no provisions in this chapter.
There are no provisions in this chapter.
4 General requirements
China Electronics Industry Corporation Issued on February 9, 1993 Implemented on May 1, 1993
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SJ28238-93
4.1 Purpose of the inspected measuring instrument Principle
BJ2951A (JS-5A) crystal blue extreme honey Hpe tester is used for testing the small and medium power crystal triode H of NPN, PNP below 15V and 1A. Its principle is shown in Figure 1.
Under the conditions of given collector voltage Vce collector current ic, the ratio of collector current Ic to base current Ig (fe/) is called static Hr (i.e. HnE). For pointer type instruments, if the collector current Ic is full scale, the value of I is H, so it can be read directly (IB is directly scaled into HFE).
4.2 Technical requirements
4.21 Collector voltage Vce
Voltage range: ±0.2～±5V, ±0.2～±10V, ±0.2～±15V; reference error: ±3%.
4.2.2 Collector current Ic
Current range: 0~±2mA, 0~±5mA, 0~±10mA, 0~±20mA0~~±50mA, 0±100mA, 0~±200mA, 0~~±500mA, 0~±1A; reference error: ±3%.
4.2.3 Base current In
Current range: 0~±0.1mA.0~±0.25mA, 0~±0.5mA, 0~±1mA, 0~±2.5mA, 0~±5mA, 0~±10mA, 0~±25mA.0~±50mA;
Reference error: ±2%.
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42.4 Current amplification factor HrE
Range: 20~500;
Relative error: ±7%.
4.3 Verification conditions
4.3. 1 Environmental conditions
Ambient temperature: 20±2℃;
b. Relative humidity 145%～75%#
c. Atmospheric pressure: 86~106kPa
d. Power supply: 220V±2%, 50Hz±1%; e. Surrounding environment: no direct sunlight, no mechanical vibration and electromagnetic field interference that may affect normal operation.
4.3.2 Verification equipment
4.3.2.1 Digital multimeter
Vpc: 0~20V;www.bzxz.net
IDc: 0~IA;
Accuracy: ±0.5%,
Reference model: 4410.
4.3.2.2 Precision electric box
R:0~50k
Accuracy: main 0.5%;
Reference model: IX38/11.
4. 3. 2. 3 Sample tube
Sample tubes should comply with the provisions of the Ministry Standard SJ3254-89 "Screening Method for Special Measuring Tubes for Small and Medium Power Crystal Triodes" and the guiding document "Sample Tube Management Methods". 5 Detailed requirements
5.1 Verification items and verification methods
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SJ20230—93
5.1.1 Appearance and normal working inspection
5.1.1.1 The inspected instrument should be accompanied by the product technical manual and necessary accessories. If it is not the first calibration, the previous calibration certificate should be attached.
S.1.1.2 The instrument under test should have no mechanical damage that affects its normal operation and correct reading: the knob rotates flexibly: the band switch jumps clearly and is accurately positioned; the meter can be mechanically adjusted to zero, and the needle should not be sluggish.
5.1.1.3 The instrument should be able to work normally and stably after being connected to the power supply and preheating for 15 minutes. 5.1.1.4 When the "Vre" adjustment knob and the needle of the adjustment knob are turned to the bottom, the Vce meter indication value should be less than 0.3V. The pointers of other meters are on the 0 scale line. 5. 1.2 Verification of Ver meter
5. 1. 2.1 Connect the instrument according to Figure 2.
BJ2951A
Digital multimeter
5.1.2.2 Set the "Vce range" switch to the "5V" position, the "polarity selection" switch to the "NPN" position, and the "lc/n range" switch to the "5V" position. .1mA gear\2mA”
gear. Adjust the “Vce adjustment” knob so that the Vca meter indicates the voltage values ​​specified in Table A1 of Appendix A (Supplement), and change the resistance value (R) of the precision resistor box so that the le meter indicates the full scale. Read the voltage value indicated by the digital multimeter at this time and record it in Table A1
5.1.2.3 Change the \Vce range\ switch to the “10V”, \15V\ gear, and calibrate the remaining points according to the above method.
5.1.2. 4 Calculate the reference error according to formula (1), -Va×100%
Wherein, V-tested indicated value;
V.—standard indicated value;
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Vm—tested range full scale value.
5. 1. 3Ic Verification of the meter
5.1.3.1 Connect the instrument as shown in Figure 3.
BI2951A
Mathematical multimeter
5.1.3.2 Set the "Vc range" switch to "5V", the "polarity selection" switch to "NPN", and the "L. range" switch to "2mA"; adjust the "Vc adjustment" knob so that the Ic meter indicates the current values ​​specified in Table A2. Read the current value indicated by the mathematical multimeter at this time and record it in Table A 2.
5.1.3.3 Set the \Ic range\ switch to the other positions and calibrate each point according to the above method.
5.1.3.4 Calculate the reference error according to formula (2). I1
Where—tested indication value
I. Standard indication value;
Im—tested range full scale value.
5.1.4 Verification of In (Hp) meter
5.1.4.1 Connect the instrument according to Figure 4.
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SJ20230—93
BI2951A
Digital Multimeter
5.1.4.2 Set the "Vce Range" switch to 5V, the "Polarity Selection" switch to NPN, the "I Range" switch to 0.1mA, and adjust the "Ic Adjustment" knob so that the "I" meter indicates the current values ​​specified in Table A3; read the current values ​​indicated by the digital multimeter at this time and record them. Table A3.
5.1.4.3 Set the I range switch to the other positions and calibrate each point according to the above method.
5.1.4.4 Calculate the reference error of the table according to formula (2). 5.1.5 Verification of H measurement error
5.1.5.1 Set the Vce range, polarity selection, Ic/I range switches to the required positions, turn the I adjustment knob counterclockwise to the bottom, insert the standard sample tube, and adjust the Ic adjustment knob. Make the Ic meter indicate full scale, read the He value directly from the Is meter, and record it in Table A4.
5. 1.5.2 Calculate the relative error of Hr measurement according to formula (3). Hm-Hrm ×100% ~
Hr indicated value of this instrument;
wherein HE
Hpeo—actual value of He in the standard sample tube.
5.2 Processing of calibration results and calibration cycle
5.2.1 For instruments that pass the calibration, a calibration certificate shall be issued. For instruments that fail the calibration, a calibration result notice shall be issued, and the unqualified items shall be noted. 5.2.2 The calibration period is one year and can be sent for inspection at any time when necessary. 6
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Appendix A
Calibration record form Wu
(supplement)
1VeE table calibration
actual value
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200rnA
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Table A2cTable verification
Actual value
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l(Hpe)Table verification
(Hre）
Actual value
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HQuantity error verification
Additional statement:
Indication value
Actual value
This standard is proposed by the Science and Technology Quality Bureau of China Electronics Industry Corporation. This standard is under the jurisdiction of China Electronics Technology Standardization Institute. This standard was drafted by the Electronic 201 Crab Station of the Ministry of Machinery and Electronics. The main drafter of this standard: Yan Jue
Project code: 075-1~47
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