SJ 2351-1983 SF-25 video tube SJ2351-1983 standard download decompression password: www.bzxz.net

Ministry of Electronics Industry of the People's Republic of China Standard SJ2351-83
SF-25, SF-26, SF-27 Video Tubes
Published on August 15, 1983
Ministry of Electronics Industry of the People's Republic of China
Implemented on December 1, 1983
Ministry of Electronics Industry of the People's Republic of China Standard SF-25 Video Tubes
This standard applies to SF-25 video tubes (hereinafter referred to as video tubes). SJ2351-83bzxZ.net
This tube is a common optical video tube with a tube neck of 26 mm, antimony sulfide target surface, magnetic focusing, magnetic deflection, and a 6.3V 4W power filament. It is suitable for industrial television and closed-circuit television devices to convert optical images into electrical signals. This standard is a supplement to SJ1561-80 "General Technical Conditions for Video Tubes". Except for the contents specified in this standard, other provisions shall be implemented in accordance with the relevant provisions of the general technical conditions.
1 The external dimensions and electrode connection of the video tube shall comply with the provisions of Figure 1 (Chapter 2 of SJ1561-80). 28.6±0.2
26.5.5
Tube base dimensions
Figure 1SF-25 external dimensions and electrode connection diagram
2 The parameter specifications of the video tube shall comply with the provisions of the parameter specification table. The Ministry of Electronics Industry of the People's Republic of China issued S on August 15, 1983
Signal electrode
Second anode
First anode
Modulation electrode
Electrode name
Implemented on December 1, 1983
Maximum value
Minimum value
Number name
Filament current
Leakage current between filament and cathode
Signal current
Resolution
Image center
Image four corners
Image center 400 lines Modulation degree
Gray scale
Image geometric distortion||t t||Image signal unevenness
Modulation electrode cut-off voltage
Cathode quality coefficient
Modulation amount
Gamma value
Gas coefficient
Target output capacitance to all other electrodes
Life standard-signal current
Life standard-central resolution
Life standard-temperament
Filament voltage
Modulation electrode voltage
SJ235183
Target surface temperature
First anode voltage
Modulation electrode
As battery
Meet 15 column
Meet 15 column| |tt||Meet 15 columns
Meet 15 columns
Meet 15 columns
Meet 15 columns
Meet 15 columns
Meet 24 columns
Meet 15 columns
Meet 15 columns
Meet 15 columns
Meet 15 columns
Second anode voltage
SF-25 type
Anode voltage
Anode voltage
250~300
250~300
250-300
250-300
250~3 00
250~300
250~300
250-300
250~300
250~300
250~300
250~300
250~300
250~300
250~300
Filament to cathode voltage
Parameter specification table
Dark current
Dark current
Signal pole
Conform to column 13
Conform to column 13
Conform to column 13
Conform to column 13 Column
Meet 13 columns
Meet 13 columns
Meet 13 columns
Meet 13 columns
Meet 13 columns
Meet 13 columns
Meet 13 columns
Meet 13 columns
Meet 13 columns
Meet 13 columns
Meet 13 columns
Target surface illumination
100001x
Filament to cathode
Electrode voltage
Signal electrode voltage
SJ2351-83
Scanning area
(Graphic size)
9.6×12.8
9.6×12.8
9.6×12.8
9.6×12.8
9.6×12.8
9.6×12.8
9.6×12.8
9.6×12.8
9.6×12.8
9.6×12.8
9.6×12.8
9.6×12.8
Meets 15 columns
Meets 15 columns
Meets 15 columns
Meets 15 columns
Meets 15 columns
Meets 15 columns
Meets 15 columns
Meets 15 columns
Comply with 15 columns
Comply with 15 columns
Comply with 15 columns
Comply with 15 columns
Test method
SJ349—73
SJ457—73
SJ1562—80
SJ1562-80
SJ1562--80
SJ1562-80
SJ1562-—80
SJ1562-80
SJ1562—80
SJ1562—80
SJ1562--80
SJ1562 -80
SJ156280
SJ1562-80
SJ1562-80
SJ1562--80
SJ1562--80
SJ1562-80
SJ1562-80
Acceptance rules
Measure the target surface after stopping light irradiation
60ms later
》is the average value
l2=5μA
Measure the target surface after stopping light irradiation
60ms later
Filament voltage
Note, ① All potentials are relative to the cathode potential. SJ2351—83
② The tests of parameters 3~8, 11, 15, 17, and 18 in the parameter specification table should be carried out under the same signal current value and the same modulator working voltage. The signal current value should be 0.2uA, and the signal working voltage and modulator working voltage must be within the rated value range listed in the table. ③ When measuring the photoelectric conversion characteristics of the video tube, the target surface illumination variation range should make the signal current between 0.02uA and 0.2uA. 3 The non-coaxiality of the core column and the glass shell of the video tube should not affect the assembly with the standard coil assembly (such as PJ-25 coil assembly) (SJ1516—80 Chapter 3).
4 The relative position of the line diagram assembly (correction, deflection, and focusing coils) of the video tube and the target surface is recommended to be based on the assembly position of the PJ25 type coil assembly (SJ1561-80 Chapter 4) See Figure 2. Focus line diagram
Magnetic tube
Correction coil
Front screen knock cover
Line deflection coil
Electrostatic shield
Figure 2 Schematic diagram of assembly of SF-25 and PJ-25 coil components 5 Requirements for the tube needle and target ring of the video tube (Chapter 5 of SJ1561-80) 5.1 The tube needle of the video tube should be parallel to the axis of the video tube, and its seal with the glass should be firm. Lay the video tube flat, and apply force to any three tube needles in sequence. The point of force is stipulated to be 6±0.2mm away from the bottom of the video tube core column, and the direction of force is perpendicular to the tube needle. The magnitude of the force is 1.5kgf. 5.2 The target ring of the video tube should be firmly sealed with the glass shell and glass slide. A gradually increasing torque is applied between the target ring and the glass shell, and the magnitude of the torque is 0.24kgfm.
Carry out a test along the target ring in the clockwise direction and counterclockwise direction respectively. After the test, measure the gas coefficient of the video tube, which should meet the requirements of the parameter specification table. SJ2351-83
6 Requirements for the working surface of the video tube (SJ1561-80 Chapter 9) The working surface of the video tube is specified to be 9.6×12.8mm2, and the number, size and contrast of defects in the working surface should meet the following requirements. The defect size is expressed in the equivalent of the number of scanning lines in the 625 TV line system. The measurement is carried out under typical test conditions. Adjust the signal pole voltage so that the dark current is equal to 0.02uA, and adjust the target surface illumination so that the signal current is 0.15A.
6.1 The number, size and distribution of defects permitted in the quality zoning diagram are defined as the number of defects per TV line.
≤3,>2
I. Zone
Defects of this size are permitted except for those that are densely packed and cause a smudged state.
Defects (dots or spots) are measured on the waveform monitor and are not counted when their contrast is less than 50% of the image background. The minimum gap between any two defects of defect size greater than two TV lines must be greater than 4% of the grating height. c.
When the number of defects in a zone exceeds the number specified in the corresponding column of the table, the excess defects may be counted in the column with a size greater than that of the defect. d.

After the life of the video tube reaches 500 hours, two defects (defects) are allowed to be added, but only one defect is allowed to be added in the I and II zones. 6.2 The orientation of the video tube working surface should make the plane passing through the axis of the video tube and the axis of the short tube needle (reference tube needle) parallel to the horizontal scanning line. 7 After the video tube has been tested by connecting and disconnecting the filament voltage for 2000 times, its working performance should still be stable (Chapter 10 of SJ1561-80). The test conditions are stipulated as follows:
Filament voltage
Filament to cathode voltage
Connection time
Disconnection time
U=6.9V (DC or AC),
Ufk=-125V,
3min.
When testing the video tube, the target surface operating temperature range is stipulated as 25±5℃ (Chapter 11 of SJ1561-80). 8
Vision tube alarm strength test (SJ1561-80 Chapter 13) 9
After the test, it should comply with the provisions of SJ1561-80 Chapter 8, and the filament and cathode leakage current, image defects, and gas coefficient in the measured photoelectric parameters should all comply with the provisions of this standard.
10The weight of the unpackaged vision tube is about 63 grams (SJ1561-80 Chapter 15) 11The magnetic field strength of the correction coil of the vision tube is 0~4 Gauss (SJ1561-80 Chapter 16), and the magnetic field strength of the center of the focusing coil is 40 Gauss.
12 Climate test of vision tube (SJ1561-80 Chapter 42) High temperature test conditions are 70±2℃,
Low temperature test conditions are -40±3℃.
SJ2351-83
After each climate test, the measured signal current, resolution, image signal non-uniformity and gas coefficient shall all comply with the provisions of this standard.
13 The photoelectric conversion characteristics of the video tube are shown in Figure 3. 0.9
Stop 0. Photosensitive surface Pixel-9.6×12.8mm
0. Panel temperature ~30
(uAo.s Sink current-0.02uA
On the target surface Color temperature 2854K Tungsten filament lamp illumination (1x) Figure 3 Photoelectric conversion characteristics
5060708090100
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