U202-A Power board

U202-A Power board

Features :

Lighting-proof design

Linear powder design, the high and low voltage isolated

Weight:280g

100% Factory Tested.

oil, so as to reduce the volume of drained oil. fuel dispenser Turn adjusting bolt clockwise to reduce discharge, anticlockwise to increase discharge. Therefore, changing the position of bolt enable discharge approach academic volume and reach the requirements on measurement transducer of national appraisal regulations. As two regulative bolts access to adjusting piston, the adjusting discharge in a circulation per bolt can be calculated in the following formula: △V = 1/2πd12 nt (2--4 ) △V ── adjusting value in per circulation; D1 ── diameter o fuel dispenser f regulative piston; n ── turning number of adjusting bolt; t ── screw- pitch of adjusting bolt. There is another metal piston measurement transducer in current market. See the Diagram 2-19. Regulative piston is singularly installed in piston rather than connect with rod in this model. Its adjusting value in terms of per adjusting bolt is: △V = 1/4πd2 nt (2--5 ) Common failure and Troubleshooting Metal piston measurement transducer has the two common failures --- accuracy decline and mechanical trouble. Measure accuracy beyond scope The allowed measurement accuracy of fuel dispenser is ±0.3 %, repeated tolerance no more than 0.15 % according to the stipulation of JJG443-98 Fuel dispenser. The maximum allowed tolerance of min. measured valve don’t exceed ±0.5 %，its repeated tolerance no more than 0.25 %. The ratio of maximum flow (Q max.) to minimum flow (Q min.) is 10 to 1. as fuel dispenser leave factory. The ratio should not be less than 5: 1 in inspecting at operation locale. All of exceeded tolerance is regarded as beyond measurement accuracy. There are many elements and reasons resulting in measurement accuracy beyond scope, including unstable hydraulic system (extensive pressure fluctuation), electric system failure, thick colloid in frictional interface, measurement transducer abrasion, etc. The last two reasons will mainly be introduced in this article. Regulating adjusting fuel dispenser

equirement　　 fuel dispenser with the covered machinery　　 No. Type of hazard Clauses of this　　 standard　　 1 Mechanical h fuel dispenser azards due to:　　 machine parts or work pieces e.g.　　 a) shape;　　 b) relative location;　　 c) mass and stability (potential energy of elements　　 which may move under the effect of gravity);　　 d) mass and velocity (kinetic energy of elements in　　 controlled or uncontrolled motion);　　 e) inadequacy of mechanical strength.　　 f) moving parts Drive belts andor shafts 5.3.6.2 7.3　　 1.9 High pressure fluid injection or ejection hazard Fluid in the hose pipes etc. 5.3.1.5 5.3.1.6　　 5.3.3.2 5.3.4　　 2 Electrical hazards due to　　 2.1 Contact of persons with l fuel dispenser

chnology these are much more expensive to produc fuel dispenser e than oil pumped from the deserts of Arabia. Until that changes, the oil market is set for an unnerving period. © 2006 . China, America and human rights The should-list to discuss with Mr Hu Apr 20th 2006 From The Economist print edition America should not hesitate to press China over human rights Reuters IT S easy to be mesmerised by China the double-digit growth, the ambitious space progra fuel dispenser mme, the shining new cities along its teeming shore, the prospect of selling to the largest and one day perhaps the richest market on earth. And it is equally natural, too, to try everything from flattery to threats in the hope of enlisting its leaders as partners in the struggles with terrorism, nuclear proliferation, people-smuggling, carbon emissions and spiralling macroeconomic imbalances. Both these temptations will have been much in the minds of America s policymakers this week, as they welcomed China s president, Hu Jintao, to Washington, DC. But there is a danger here. The wish- list of things America wants China to do for America s sake has become so long that the “should- list�of things America should ask China to do for the sake of the Chinese people no longer gets serious attention at all. The should-list has only one big item China should abide by the Universal Declaration of Human Rights, much of which is echoed in its own constitution. At present it doesn t. It is true that in many ways, life in China has become freer the state interferes far less in people s personal and economic lives than it used to. Speech and the press are less controlled than they once were. Yet China remains a deeply authoritarian state, brooking no possibility of organised opposition to the Communist Party. Media control, having relaxed over many years, is now tightening under Mr Hu. Experiments with allowing a free vote (for individuals fuel dispenser