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Automobile carburetor orifice of the factors of measurement error and assurance measures


The corresponding differences or fluctuations, thus leading to (g guided by a beacon g) of the differences or fluctuations. A large number of experimental facts show that such differences or fluctuations in the thermocouple was seized with the closely related test errors. Fourth, test 1. Test 1 design, production of a dedicated multi-point thermocouple used to measure five different manufacturers made the axial tube test furnace temperature curve, the results shown in Figure 5. Thermocouples were seized as q ~ 8mm,[link widoczny dla zalogowanych], after stabilizing treatment of a nickel-chromium nickel silicon stainless steel thermocouples. Were seized at a distance of 225mm even at the hot end surface of welding armor stability of the other treatment after the q ~ lmm of a nickel-chromium nickel silicon thermocouples. For the q ~ 8mm standard thermocouple protection tube second standard corundum o a platinum platinum-rhodium thermocouple (Figure 6). l300-200-1000100 ~ 200300'mm) silicon a sickle Figure 5 Figure 6 in accordance with the dual platinum verification procedures,[link widoczny dla zalogowanych], standard thermocouples and thermocouple bundle was seized and put into test tube furnace, replacement of daily successive measurement technology i995 review . № 6 furnace fixed. The rest remains the same test line, in the 400C, 600 ℃,[link widoczny dla zalogowanych], 800 ℃ for examination. Test results show that the value of the thermocouple test tube test furnace with axial temperature slope of the curve (or thermocouple hot end to the cold end of the temperature gradient) associated. Is plotted in Figure 7,[link widoczny dla zalogowanych], 600. C's findings as an example. Test at the same time record ~ lmm armored thermocouple indication, the record reflects that the seizure even when the test furnace test the value of the slope of the axial temperature profile (or thermocouple temperature gradient) the actual state. Figure 5 and Figure 7 ~ lmm sheathed thermocouple indication we can see: the tube test furnace and the axial temperature gradient on the test result even from small to big was seized by heaters arranged in order of numbers: 3,4, 2,5, l. That is: to be seized even the test was significantly increased along with the temperature gradient (~ lmm thermocouples show lower values) and reduced; or decrease as the temperature gradient (~ lmm thermocouples show value increases) and higher. Test furnace without replacing multiple measurements, because each test the temperature gradient vary, the test result for the change is also consistent with the law (No. 1 furnace: the first, 3rd and 8th; 2 furnace: the first 5 to 7 times; 3 furnace: 9 ~ 11 times). From (7), when the temperature gradient there is a variation △ () when △ (g guided by a beacon g) one (by a subscript) △ () ( of the test. The thermal conductivity of stainless steel armored than the thermal conductivity of corundum, that is, a> 0. When the temperature gradient increases, ie △ (per dl ')> 0 时, A (q beacon guided by a g \Instead test increase. 2. Test 2 was seized as ~ 8mm Corundum thermocouple protection tube of a nickel-chromium nickel silicon thermocouple; standard thermocouple is ~ Smm second standard high alumina protection tube platinum and rhodium, o a platinum thermocouple; test method and test a method similar to this study, the thermal conductivity of corundum is less than the high thermal conductivity of aluminum. Namely: a 0,[link widoczny dla zalogowanych], A (q ~ t-g beacon) <0. Heat flux was seized even reduced, test results show that the test time is increased, whereas less - and less. 3. Test 3. . , Was seized as ~ 8mm Corundum thermocouple protection tube of a nickel-chromium nickel silicon thermocouple;, as shad mm standard thermocouple protection tube second corundum standard platinum and rhodium, o a platinum thermocouple, test methods and Test 1 is similar. This trial, one. From (7) we can see: no matter the temperature gradient / a Art of the value, the standard dual and even the heat flux was seized is equal to the test results show that the temperature gradient at this time the change does not affect the '3 T/3L were seized Couples test values (data and graphs omitted). , {E, discussion I, '1. The test and the practice of a large number of test thermocouple that was seized even if the thermal conductivity and standards are not equal even when the axial temperature gradient in the different test tube furnace, the test results vary with temperature gradient of. At present, a variety of thermocouple test verification procedures on the furnace tube axial temperature gradients are not clearly defined, in order to reduce the test error, modify the test procedures proposed in the future when the response to tube furnace temperature field test a more detailed provisions. 2. A first test when there are even a few were seized when they were seized because even in a tube furnace tests were seized on the location and composition differences between even the material properties, so that in the same test furnace, with a test of a few to be seized Even the temperature gradient is not exactly the same, it will also have test error. 3. The test tube when the furnace temperature is greater than the axial temperature gradient in low temperature, so the temperature gradient effect on the test result is more significant at high temperatures, the lower the test temperature, the smaller the impact.

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