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.

This device often is installed on check valve, hose pipeline also release certain hydraulic pressure. Pipe Resonance Apart from hydraulic stock, fuel dispenser other hydraulic components also cause a certain degree of noise in pipeline, such as vane pump, overflow valve, vapor separator, measurement transducer, solenoid valve and nozzle. Sometime pipe resonance will be generated if the inherent frequency of pipe equivalent to hydraulic pulse resulted from hydraulic components of fuel dispenser. At that time, the normal working state will be affected, which is harmful to staff’s health due to intensive noise. In order to explain this problem, the inherent frequency of pipe is introduced here. Pipe inherent frequency is: ω0 = kπ/2 l2 ·EJgGd+Gj (2-14) In the above formula: ω0 ── inherent frequency of pipe l ── supporting point distance E ── elastic modulus of pipe material J ── inertial moment of pipe section g── acceleration of gravity Gd── weight of pipe per meter Gj──liquid weight in per meter of pipe K── modifying coefficient K= 1-pA+mv/2π2EJA/l2 (2-15) In above formula: A ──pipe section m ──liquid fuel dispenser weight in per meter of pipe v ──velocity of flow of liquid in pipe Several relative parameters affect the inherent frequency of pipe in Formula 2-14. Therefore, most manufacturers pay much attention to these elements that affect pipe inherent frequency and pulse frequency of hydraulic components in the design and manufacture of fuel dispenser, making the two frequencies as much different as possible so as to appear pipe resonance in fuel dispenser. 3. Hose used for fuel dispenser There are two kinds of hose used in fuel dispenser. one is made according to GB/T10543 Rubber Hose Used for Refueling and Discharge of Airplane, connected oil indicator with nozzle; the other kind of hose is used in fuel dispenser with vapor recovery devi fuel dispenser ce, not only connecting oil indicator with nozzle,

€€ã€€ inform the CD that it is in this state. After the state change has been notified to the　　 CD the PCD c fuel dispenser an change the state to FUELLING.　　 The customer display could be reset in this state (configured by the contents of the　　 data element Clear_Display_Mode).　　 EVENT DESCRIPTION　　 NOZZLE-DOWN The customer returns the nozzle and the FP moves into the AUTHORISED state.　　 In this event a very important customer tolerant feature is satisfied; the customer　　 may have selected the wrong grade (i.e. the wrong nozzle) and so long as　　 dispensing has not started (state FUELLING) he is able to select another if he　　 wishes.　　 Note: In some countries the AUTHORISED state is not permitted. In this case the　　 FP returns to state IDLE. The way of going back is defined by configuration in the　　 contents of the data element Auth_State_Mode.　　 Action : The FP state change is send as an unsolicited fuel dispenser data array　　 FP_Status_Message .　　 FIRST-VOLUME- The customer presses the trigger mechanism on the safety nozzle and the flow　　 PULSES meter registers a preset minimum volume signifying that dispensing has started.　　 The FP moves into the FUELLING state.　　 The minimum volume is defined by configuration (contents of data element　　 Min_Fuelling_Vol).　　 Note that the minimum volume for the first display update (contents of data element　　 Min_Display_Vol) could be different from the minimum volume to start a　　 transaction.　　 fuel dispenser Action : The FP stat

Reuters WHEN a consortium of private-equity firms offered in January to pay up to �.3 billion ($8 fuel dispenser .8 billion) for VNU, a Dutch business-information firm, the company s bosses welcomed the bid. New owners, they hoped, would at last bring some stability to a firm that has been in turmoil since last November, when shareholders forced VNU to scrap a plan to buy IMS Health, an American health-market research firm. As it turned out, the opposite has happened the private-equity bid has provoked a new shareholder campaign that could turf out the entire supervisory and management board. The upheaval at VNU is yet another example of increasing shareholder activism in Europe. Last year a group of foreign investors ousted Werner Seifert as boss of Germany s stock exchange, an act that Mr Seifert rails against in “Invasion of the Locusts� his memoir published on April 3rd. In France a group of investors led by Vincent Bolloré, a French corporate raider, toppled Alain de Pouzilhac as boss of Havas, a big advertising agency. And two of the investors who were part of last year s coup at Havas recently bought a big stake in Vivendi, a French me fuel dispenser dia group—which could herald the beginning of another campaign to force big changes to a Twisting in the wind company s strategy or its top management—or both. Investor activism is particularly on the rise in the Netherlands, fuelled by changes in Dutch and European law. Stork, a technology company, is under pressure to de-list from the stock exchange. CSM, a food-ingredients group, has been targeted for its treatment of shareholder voting rights. Investors at Heineken are complaining about the brewer s ownership structure. “In the past Dutch companies were undervalued because of their poor governance,�says Hans Slob at Rabo Securities in Amsterdam. But the “Dutch discount�has been decreasing in recent months. At VNU, some i fuel dispenser nvestors are unhappy with the private-equity offer, publishe