U501-A Pulse sensor

U501-A Pulse sensor

This incremental shaft encoder has been designed for heavy-duty application, especially for use in petroleum & diesel dispensing environments where potentially explosive atmospheres can be expected. It features a rugged and compact construction as well as a wide selection of mechanical and electronic variations.

Materials:

Housing: Die cast aluminum alloy

Bearings: Self-lubricating sintered bronze

Features :

A high advantage in reliability and adaptability.

A large selection of shaft couplings, including couplings with built-in backlash clutch facility.

Standard sealing screws.

The fuel resistant cable can be customized regarding length.

Suit the Bennett SB-100 meter and other meters whose pulse per circle is 60.

100% EX approved and tested.

Specifications:

Power supply: 5 VDC, fixed or variable

Current Consumption: Standard 10 to 30 mA, max 90mA

Number of Channels: 2

Number of pulses: 60 ppr

Output Signal: Square wave duty cycle 50%+10%.

Phase Shift: 2 channels 90° (25% +5%)

Output Stage: NPN

Output Current: Max. 30mA

Hysteresis: Min. 0.2°

Output freq. Min. 1000Hz

Temperature range: Working -40 to+ 70 degree

RPM: Max 3000RPM

Mounting: With 3 pcs. M4 screws

Weight: Approx. 340 gram. Excl. the cable

Wiring:

Color Channel plug

Green +5V 2

Black CH1 3

Yellow 0V 4

Blue CH2 5

Red +5V 6

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Approval:

The shaft encoder has been tested and granted Ex and EMC approval.The Ex-approval is EX d IIA T3.Ex certificate number is CE991209.

Package:

Cross Weight Dimension

340g/case of 1 186x157x29mm/case of 1

Important:

The products should be used in compliance with applicable country, province and local Laws and regulations. Products selection should be based on physical Specifications and limitations and compatibility with the environmentand materials to be handled. HONGYANG makes no warranty of fitness for a particular use. All illustrations and Specifications in this literature are based on the latest products information ilable at the time of publication,HONGYANG reserves the right to make changes at any time in price, materials. Specifications and models and to discontinue models without notice or obligation.

e accuracy. Vapor separator mounted check valve should have the anti-backward flow function. Check valve plays a role th fuel dispenser at provide a path for oil passing vapor separator when refueling, and closed as stopping filling to ensure next time accuracy. Moreover, it is able to reduce hydraulic impact and strict the high pressure in hydraulic system as nozzle suddenly stopping. Here introduce the structure, working principle and troubleshooting of vapor separator generally employed. Structure Diagram 2-12, 2-13 and 2-14 are shown the structural cutaway view, exploded drawing and dimensional structure. Vapor separator is divided into these components of frame, upper cover, outlet pipe, spring seat and exhausti fuel dispenser ng pipe. By function, it consists of filter device, vapor segregated device and anti-backward flow device, illustrating in Diagram 2-12 and 2-13. 1\2-Bolt 3-Elastic washer 4-Exhaust jointer 5-Upper cover 6-Valve seat 7-Upper cover gasket 8-Valve bracket 9-Small axis 10-Screw 11-Gas outlet valve unit 12-Fuel return float 13-Ball-float 14-Screw 15-Frame 16-Spring washer 17-Seal gasket 18-Filter unit 19-Bolt 20-Filter 21-Stainer net 22-Gasket 23-Filter end 24-Nut 25-Seal gasket 26-Plug 27-Check valve unit 28-Bolt 29-Gasket 30-Check valve washer 31-Check valve 32-Oil pipe 33-Seal gasket 34-Spring seat 35-Bolt 36-Spring 37-Plug 38-Return oil valve seat 39-Return oil valve 40-Spring 41-Seal gasket 42-Guider bar 43-Oil plug 44-One-way valve Diagram 2-13: Vapor separator exploded drawing Filter device: in past filter material adapts industrial felt, which is difficult to clean and has large flow resistance. Then ladies nylon is used, but this kind of material has low filter precision. Domestic manufacturer now widely adapt stainless steel filter, having advantage of anti-rust, even net holes, guaranteed filter precision and low resistance as well. Diagram 2-12 clearly shows the install position of filter. Pump will be effectively protected through installing a high filter precision strainer fuel dispenser at the

ies　　 6.1.4.6.1 General　　 Any certified EEx d cable entry is ac fuel dispenser cepted without further testing.　　 32　　　　　　 6.1.4.6.2 Test apparatus　　 An approximately cubic sealed vessel having a net volume in the range of 1 l to 10 l but not less than that of the　　 largest cable termination enclosure to be installed within the metering pump dispenser or remote pumping unit　　 with a number of holes in the side walls adapted to suit the entry devices under test or to permit blanking off if not　　 required. The vessel shall be equipped with gas entry and exi fuel dispenser t ports and with an ignition device to ignite the gas　　 centrally.　　 6.1.4.6.3 Test cables　　 If the tests are intended to cover only individual specific cablecable entry combinations the tests shall be carried　　 out on those particular combinations. If the tests are intended to apply to ranges of specified type of cable the　　 samples of cable used in the tests shall include:　　 � 3 cores of the largest cross-sectional area conductors that can be accommodated; and　　 � the largest number of the smallest cross-sectional area conductors that can be accommodated.　　 If the tests are intended to cover unspecified cables or cables where the cable cross section may be expected to　　 have gaps or leakage paths the test cable may be either as mentioned above or be a specially prepared test　　 sample as described below whichever is considered by the testing authority to be the most onerous.　　 The test cable shall have at least 20 % of its cross-section unfilled and shall have a conductor configuration such　　 as to give the most unfavourable cond fuel dispenser

upreme. Then an opposition man, Vicente Fox, of the National Action Party (PAN), wrested control. Now his time is up; h fuel dispenser e cannot run again. What is to be made of his record, and of the promises of his would-be successors in this still unfamiliar democratic landscape? One answer may be found in Tepito market, just north of Mexico City s centre. At first sight, the vista seems to have no end. Stall after stall after stall, each selling almost the same products—knock-off clothes and bootleg DVDs, electronic gadgets of all sorts. Tepito well represents much of the country at large. It is chaotic and lawless, yet also vibrant. Police loiter idly. Regulations are ignored. Taxes go unpaid. The idea of effici fuel dispenser ency is a joke. Yet it works, just. There would not, after all, be much demand for DVDs if people did not own the equipment to play them. Tepito s most telling characteristic, though, is its complaisant constancy. Even as technology changes the products sold there, the place itself has remained the same, a maze where little is legal and almost anything obtainable—if you know the right people. All this is made possible by the vendors cosily corrupt relations with the city government, which allows Tepito to operate in return for regular payments and political loyalty. That same relationship is pervasive throughout Mexico, and so is the inertia it fosters. Despite an air of optimism when he was elected six years ago, Mr Fox has not lived up to his promise. His victory completed a slow transition to democracy, but the fruits of that democracy have proved elusive. In many ways Mexico is freer than ever before. For the first time in decades, barring a last-minute jolt, a presidential term will have passed without an economic crisis. Social programmes have reduced extreme poverty, and the government has slowly become more open. But much remains unchanged. Mr Fox has failed to tackle vested interests effectively or to make the other reforms that Mexico so sorely needs. Antiquated unions re fuel dispenser mai