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U201-A Main board


U201-A Main board

Features :

Dual stable voltage input

Running normally on the condition of -40~~+55degree

Board-fixed EMC component

Input & output signal differentiate from system voltage individually

CPU changed only for different models


100% Factory Tested.

Con Conection Con Conection Con Conection

P1 micro-swith 1 P6 power board P12 ----------

P2 micro-swith 2 P7 sensor 1 P13 display 1/A

P51 keypad 2 P8 sensor 2 P14 display 1/B

P3 keypad 1 P9 computer

P4 power board and SSR P11 display 2

products links


technical archives

    e, low fuel dispenser cost and convenient maintenance, vane pump is widely adopted in many industrial areas. Most of domestic manufacturer of fuel dispenser install vane pump as component. Vane pump includes ration pump and variable pump, the former is mounted in fuel dispenser. At recent years, the domestic noise research for vane pump has been achieved good progress conducted by fuel dispenser manufacturer. The noise of vane pump has remarkably been downed, reaching to less than 70 d B. it is introduced as followed: 1: Cap nut 2: Adjusting bolt 3: Spring seat 4: Spring 5: Blade 6: Rotor 7: Plug 8: Spring flake 9: Axis 10: Frame 11: Overflow valve 12: Valve seat Diagram 2-1: Vane pump structure drawing Structure and working principle of vane pump The Diagram 2-1 and 2-2 illustrate one kind of vane pump about its structure and tridimensional exploded drawing. This kind of pump prevails in domestic fuel dispenser market. Its structure, principle and maintenance will be introduced. Vane pump consists of overflow valve and vane pump illustrated in Diagram 2-1. Overflow valve is installed on the upper of body, including overflow valve seat, vale core, spring, spring bracket, jointer, adjusting bolt and cap nut. The lower body is pump section composed of gliding bearing, rotor subassembly, blade set, spring flat and pump cover with gliding bearing. The right side of diagram is inlet, the opposite outlet. The working principle, performance and common troubleshooting of vane pump and overflow valve will be presented respectively. Vane pump section The chamber in where rotor installed is pump chamber, its installing procedure showed in diagram fuel dispenser 2-3. A centrifugal degree e between the center of chamber and rotor is illustrated in diagram. There are upper and down seal area, high pressure and low pressure transitional area, divided by the center of rotor. The angular degree in sealing area is larger than that fuel dispenser of degree formed by the neared two vanes so as to prevent oil flow between low and high pressure areas. 1-Cap

technical specification

    the d fuel dispenser ivision s services to  partment was disbanded and the research the four fields of work and to the supporting  work it had not yet completed is continued in services for the rest of the PTB. With a share  the Optics and Ionizing Radiation Divisions. The of more than 70 % emphasis is now laid on  Technical Services Section and the Management support for the divisions. This comprises  of Building Projects area were transferred to mainly the technical and infrastructural  Division Q from the Administration and Opera- management of premises including data  tion Division and the Languages Service from processing services the Academic Library  the Press and Information Office. To reflect this and the Languages Service. Approximately  modified structure the division s mission was 16 % of the services is rendered in the Inter-  reformulated. It now consists of two elements: national Affairs area approximately 3 %   each in the fields Fundamentals of Metrol-   Support for the divisions by scientific ogy and Metrology for Society. As work in   technical and infrastructural services. these three areas is of particular interest to the   Scientific and technical cooperation with PTB and its partners in spite of their small   national and international partners. share the present report will be mainly   focussed on them.  With the per fuel dispenser formance of this commission  more than 160 staff members in four depart- Fundamentals of metrology  ments nine sections and eight projects or   Questions regarding the evaluation of meas-  working fuel dispenser groups are entrusted.  

we are committed to create the best workplace, encourage our staffs to put their own personalities into their jobs, and provide them a stage to show themselves.

    have fuel dispenser got them (because courts or—here s a surprise—legislatures have managed to block them). But there are problems with term limits, both in principle and in practice. In principle, denying anybody the chance to run for office seems illiberal, barring a few exceptional posts (such as the presidency). In practice, term limits have not shaken up the political class members have simply reappeared under new guises. The best way to make Americans interested in politics is to make the races more competitive. Participation jumped in 2004 because the presidential race looked both close and important. Which points to the most glaring problem of all with American democracy—partisan redistricting. Virtually all the states allow their politicians to gerrymander the boundaries of their districts, creating absurdly-shaped patterns. This makes races pathetically predictable 98% of congressmen are re-elected, a ratio Leonid Brezhnev might have admired (though even the Soviet fixer would surely have felt the 100% outcome for California s incumbents in 2004 was a tad too obvious). It also drives politicians to the extremes, as they court their real electors, party activists in the primaries. With luck, a particularly naked bit of redistricting by the Republicans in Texas will force the Supreme Court to make changes—and force states to follow Iowa s lead and hand over redistricting to an independent board. Democracy may be messy; but there is no point in making it a farce. © 2006 . About sponsorship France s labour laws In rare praise of Dominique de Villepin Mar 16 fuel dispenser th 2006 From The Economist print edition French students are missing the point of the government s labour-market reform REVOLTING students unnerve French governments. In May 1968 they forced de Gaulle to dissolve parliament and, a year later, to step down. In fuel dispenser the 1980s they made the prime minister, a certain Jacques Chirac, abandon university reform after a s