JB/T 9453-1999 Technical requirements for bimetallic thermometers for meteorological use JB/T9453-1999 Standard download decompression password: www.bzxz.net

FCS 17.200.20
Machinery Industry Standard of the People's Republic of China
JB/T9453—1999
Technical conditions for the meteorological bimetallic thermometer
Specifications for the meteorological bimetallic thermometer1999-08-06Promulgated
National Machinery Industry Bureau
200001-01Implementation
JB/T 9453—1999
This standard is a revision of 7IY134--83 Technical conditions for meteorological bimetallic thermometer. During the revision, the original standard was modified in accordance with the requirements of the national standard CB/T1.1-1993 Guidelines for Standardization Unit 1: Principles of Drafting and Expression of Standards Part 2: Basic Provisions for Standard Writing. The first section (scope) and the second section (referenced standards) were added. The main technical content is chemical. This standard replaces ZBY134-83 Technical Specification for Bimetallic Flowmeters for Meteorology from the actual scale. This standard was proposed and coordinated by Changrong Meteorological Instrument Research Institute. This standard is expected to start from Unit: Changyu Meteorological Instrument Research Institute. The main drafters of this standard: Bo Lizhong, Liu Mingshu. This standard was first issued in 1964 as the Ministry of Standards 47864 Bimetallic Thermometer Technical Specifications: After revision in September 1983, it was issued as the professional standard number 2BY134-83 Meteorological Bimetallic Thermometer Technical Specifications. 1 Scope
Machinery Industry Standard of the People's Republic of China
Technical Specifications for Meteorological Bimetallic Thermometers
Specifcaton for be metorologiel tineulle tbermograph JB/T 8453—1999
Y134-83
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of meteorological dual-gold thermometers
This standard applies to meteorological dual-gold thermometer products [hereinafter referred to as thermometers. 2 Reference standards
The following clauses are included in the following references and become the clauses of this standard through reference in this standard. When the standard is published, the following clauses are used as references. All versions are valid, all standards will be revised, and all parties using this standard should explore the possibility of using the following standards. 9329-1599 Instrumentation and Transportation Monitoring Basic Environmental Conditions and Test Methods B/T9452-[999 Weather Receiver Type Clock Machine Automatic Recording Needle 3 Pull Requirements || tt || 31 Thermometer can work properly at an ambient temperature of -35℃ +45℃. 3.2 The indication of the thermometer is relatively light when compared with the standard. When the indication error of the 0 point is adjusted to 0.C, the indication error of the humidity external to the base resistance should not exceed ±1.0°C.
3.3 When the thermometer is working properly, the error between its indication and the actual temperature at that time should not exceed ±1.0%°C. 3.4 The surface of the bimetallic plate of the position measuring element should be smooth and flat all around. There should be no gap between the two metals at the joint. The coating should be uniform and free of defects such as age, mechanical decay, etc.
3.5 Bimetallic The fixing of the two devices and their connecting parts must be tight and there should be no gaps and looseness. The transmission system should be accurate and flexible. When the temperature is affected by the temperature, the tip should be stable and effective on the self-recording paper. The maximum step difference of the tip on the self-recording paper caused by the transmission system core difference rate should not exceed .5, 3.7 stem cavity flat, light method, with lifting, can make the pen have appropriate pressure on the self-recording year. The whole tip is sharp, no scratches, broken lines, or the thickness should not exceed 0.3.
3.6 The pin can move in any position, and the limit position is: the distance from the pen to the outside is not less than 61, and the distance from the pen to the inside is not less than mm. 3.9 The screw of the self-recording pen should be flexible to rotate, so that the pen center can move smoothly on the self-recording paper, and can be fixed in an unbalanced position. The center of the timer should be perpendicular to the bottom. When the pen draws a line on the self-recording paper, it should be aligned with or halfway along the time mark, and the difference should not exceed 1/3 (diary type) or 1/4 (weekly type) of the distance between adjacent time marks. 3.11 After opening the thermometer and removing the self-recording pen, the instrument shall not fall over. 3.12 The self-recording pen used shall comply with the relevant provisions of J/T9452. 3.13 The thermometer components should be installed correctly and securely, and there should be no looseness, deformation or other defects that affect the use. 3.14 The coating of the thermometer components should be solid, uniform, smooth, and there should be no defects such as delamination and rust. National Machinery Industry Weekly 19-08-08 World Standard 2000-0101 3.15 A complete set of thermometers should include: a) Thermometer: one set; b) Recording water: one bottle c) Pen tip: two sets; e) Self-recording paper: 400 sheets of diary self-recording paper or 0 sheets of weekly self-recording paper; e) Instruction manual: one set; f) Certificate of conformity: one set. 3.16 The transportation and packaging of thermometers should comply with the relevant provisions of /T9329. 4 Test methods and inspection rules 4.1 Each thermometer should be inspected and qualified by the manufacturer before it can leave the factory, and a certificate of conformity should be attached. 4.2 Each thermostat shall be inspected before delivery according to the requirements of 3.2.3.4-3.14. 4.3.2 Test method
4.3.1 Test equipment:
e) Three thermostats (0℃, 40℃, 30℃ respectively). The temperature change rate inside shall not exceed 0.2℃/min, the temperature shall be uniform, the horizontal temperature difference shall not exceed 0.1, and the vertical temperature difference within 10cm of the height shall not exceed 0.2. b) Three standard thermometers.
c) One 4-6 times magnifying mirror.
4.3.2 Test requirements
During the test, the thermometer must be placed flat;
The sensing element of the thermometer and the ball of the standard thermometer should be on the same level:) The settling time of each test point should not be less than 3im; Deviation of test points:
0℃ point: -1C- +1℃
40℃ point: 40=41%
-30℃: -30℃--31°℃
) Test sequence: First make the 0%℃ point, then make the 40% point and -30℃ point (or -30℃ point equals 40℃ point). The reading should be accurate to 0.1℃,www.bzxz.net
4.9.9 Recording integer
) Calculate the difference between the thermometer indication and the standard thermometer indication: b Calculate the difference between the 40℃ point and -30% point when the 0℃ point is adjusted to 0.0℃. 4.43.6 Test Method
Adjust the pen tip to the +5%C point, tap the base of the instrument, turn the pen tip to make a horizontal cut, then lift or press the pen shaft upwards to 109℃-15℃. When the pen tip is restored, observe whether the value between the pen tip and the horizontal line exceeds the specified step difference: use the same method to observe the step difference between the 40℃ point and the -30% point.
4.53.10 Test Method
Adjust the pen tip to any time scale line on the 45℃ scale, then adjust the pen tip to move along the time scale line, and observe whether the double line and the time scale meet the requirements.
4. The results of the re-test should still meet the requirements of this standard. When the error of the indication value at the 0℃ point is 0.0, the difference between the error of the two end points and the original test result should not exceed 1℃. 4.7 Thermometers shall be subjected to type tests in the following cases: 1) when the design, process and materials used are to be changed; 2) when production is not frequent and production is resumed; 3) when batch-produced thermometers are sampled regularly for inspection; 4) when similar products are compared. 4.8 When batch-produced thermometers are subjected to type tests at least three thermometers shall be sampled for type tests every year. In other cases, the items and quantity of type tests shall be determined according to the specific circumstances. 4.9 Type tests of thermometers shall be conducted in accordance with the technical requirements of this standard. 5.1 Each thermometer shall be equipped with a nameplate at an appropriate location, and its contents shall be as follows: Manufacturer name: a) Product name and model; c) Product serial number; d) The serial number of the self-recording paper; and d) Year and month of manufacture. 5.2 Before the thermometer is packed into the inner package, appropriate measures shall be taken to prevent the tray and self-recording clock from being damaged. 5.9 After the meter is put into the inner packaging, it should be fixed firmly. The inner packaging should be marked with: a) manufacturer name; h) product name and number; e) year and month of production; d) "upwards" and * symbols. 5.1 The outer packaging box should be firm, reliable, moisture-proof and rain-proof. There should be a protective device between the inner packaging and the outer packaging. 5.5 The following contents should be clearly and prominently marked on the appropriate position of the outer packaging box: manufacturer name, product number, Number or name: a
Name and address of government and goods unit:
Box size, weight, standard number:
d Mark "Do not invert", "Do not trace", "Secure instrument, handle with care" or other words or corresponding symbols. 5.8 Each box of thermometers should be accompanied by a packing list. 5.7 The thermometer should be placed in a room with a temperature of 10℃～+40℃ and a relative humidity of no more than 80%. There may be no heat from the thermometer in the room, 3
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