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 Wysłany: Sob 4:40, 11 Gru 2010 Temat postu: ugg prezzo Measurement error of vertical metal can |
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Vertical metal cans of artificial measurement error
Measurement error of 4-0.3 'E, the temperature error of 0.3 arising from the density of error: r'At = 0.0008X0.3 = 0.00024g/em3 In addition, as the input and the oil tank output, will have the density stratification, the methods according to the provisions of the true sampling density of the oil and the tank is still error, taking into account the density of a division value 0.0005g/om3. When measuring the density with the density of the error, the temperature measurement error caused by the density of the error and sampling error of three taken together: 0.0005 +0.00024 +0.0005 = 0.00124g/cm 0 if the measured oil density .8 c, the density measurement error: LXp / p = 0. O0124/0.8 = 0.155e five synthetic composite error measured without considering the air buoyancy correction, the basic formula for calculation of oil quality is: M = V2o'p ∞ where, 20 - volume of engineering standards ; P20 - temperature, density of engineering standards. Density by the volume of error and error caused by the quality of the error is: AM / M = l (1,[link widoczny dla zalogowanych],20 + △ l, 20) (P20 + △ P20) an l, such as p20J / l, 20p as = 2o / l,[link widoczny dla zalogowanych], 20 + Ap2o / pzo + △ Vzo × Lxpzo/V20p20 spent the last item, then: △ Estate / ≈ △ V2o/V2o + Apzo/p20 △ l, 20/V2o the main factors include the following: l, 1 for the oil tank volume error, which is Verification of the accuracy of tank. According to (JJCI68-87 vertical metal tank verification procedures \p2o include the following factors: l, 3 for the temperature measurement error caused by the quality of oil per unit volume error of 0.1%; 4 is the density measurement error, 0.155% Therefore, the integrated error of fuel quality : · 37 · AM / M = 2o/V2o + △ P2020 =,+~/ I li:, + √ = 0.202 +0.184 ≈ 0.38% six to improve the measurement accuracy. measures to reduce the measurement error 1. Use of measuring instruments and equipment must meet the accuracy requirements and test cycle in the tank liquid level measurement using 2, check the oil level before settling time scale of not less than 30min, the oil must be stable and the bubble surface disappears then measured. 3. seized two feet to be a difference in 1Etlm time to review the first few feet of the subject, more than lmm, should be re-examining feet, and took close to three times the number seized two feet arithmetic mean. 4. thallium to regularly check on the foot, such as thallium bald wear of cutting-edge. must be promptly replaced. 5. temperature, the thermometer position to be correct, accurate, asked to stay in the retention time,[link widoczny dla zalogowanych], but also up and down within a certain range twice to again and again to the temperature balance. raised the thermometer, make sure that the lower temperature box filled with liquid, readings, pay attention to the leeward hidden. 6. the determination of density, the average oil loop line with standard methods for sampling, proud to take time alone. There conditions the best use of time, and quantity, the pipeline automatic sampling. Determination of oil density in the laboratory to carry out, to have the water bath temperature control, must be close to the tank oil temperature, requiring less than ± 5 ℃. international recommendations, the best controlled within ± 3 ℃. 7. metrologists to be relatively stable, and strengthen staff training measures to improve their service quality and responsibility. 8. proposed radar level gauge thermocouple thermometer, a computer monitor for assistance. characters Digital temperature measurement device for amplitude Wang Jingkai (Dongfeng Chaoyang Diesel Engine / Si \ Division Quality Department, Chaoyang, Liaoning 122000) Abstract casting process according to the temperature in the importance of developing a digital thermometer with XMW a 10C increase in letters of support sync thermometry devices. and discusses its principles and the most important group. Keywords characters simultaneously increase temperature measuring device introduction to solid-state relay crown known rainbow lamp, casting temperature and casting speed is of the quality of one of the main factors on how to improve temperature, based on the simultaneous casting operator to see the temperature display,[link widoczny dla zalogowanych], and then casting speed according to temperature changes. This is the development of a 10C XMW supporting characters thermometer temperature measuring device for the purpose of increase of a synchronous,[link widoczny dla zalogowanych], large pieces of digital temperature system components, principles, technical specifications 1. characters composed of pieces of digital temperature measuring device and principle of the main characters from the pieces of digital temperature measuring device of a 602 micro-thermocouple WRS, xMw a molten steel temperature is only 10C fast, large pieces of digital display system and the standard calibration device composition. (see Figure 1) Figure 1 banana silk weight check
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