U501-B Pulse sensor

U501-B 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 70degree

RPM: Max 3000RPM

Mounting: With 3 pcs. M4 screws

Weight: Approx. 340 gram. Excl. the cable

Wiring:

Color Channel plug

Red +5V 2

Green CH1 3

Blue CH2 4

Yellow 0V 5

Package:

Cross Weight Dimension

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

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.

Ordering Specifications:

Product ID Product name

U501-B pulse sensor

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 available 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

ection is small, pump suction is large; vice versa, large returned oil low suction distance. Diagram 2-5: Suction flow of vane pump Suction capacity of pump is restricted not only by its fuel dispenser structure but also by the oil physical trait and pipeline. Under a certain temperature, air pocket phenomenon of oil will generated when vacuum reaching a given degree, so that the pump can’t suck oil normally. At high oil level, large resistance from pipeline, much higher vacuum pressure occurs at the inlet of pump; the higher temperature the more likely create air pocket. The phenomenon is likely to appear given the oil is gasoli fuel dispenser ne. The phenomenon of cavitation is generated when partial pressure at fuel dispenser inlet of pump is low than air pressure, the dissolved gas in oil begin separate out, and oil start gasifying vigorously as pressure getting down, reaching saturation pressure. The normal working of pump is affected due to a great of foam damaging the continuity of liquid flow. Fuel dispenser is likely come out any oil or work with large noise as the cavitation is severe. Components will be damaged in this long phenomenon. At same time, oil vibration is increased so that the accuracy become down, as well as shorting service life of hydraulic components. The correlation between liquid saturation and gas pressure is illustrated in diagram 2-6. Diagram 2-6: Relations among temperature, steam pressure and liquid saturation Diagram 2-6 shows gasoline more likely to Air area than water and coal oil under the same pressure along with temperature increasing; under the same temperature the more vacuum pressure the earlier in air-area. There are two aspects that should be considered to prevent cavitation in pump inlet. One is that the design parameter of pump should be rational. The other is that pipeline should be installed scientifically. The effect of hydraulic pipe to fuel dispenser’s suction capacity will be introduced in detail. To understand the principle of cavitation and causation of affecting pump suction capacity is

currently fuelling do not stop the transaction. Continue to dispense fuel until the end of　　 the transaction or a previous defined limit has been reached. Basically the off-line　　 fuel dispenser situation has no affect on the operation of the Dispenser.　　 Do not remove the off-line SC device from the Recipient Table.　　5.4.2 Actions when a Dispenser recognises that a SC comes back on-line　　The Dispenser can recognise that a SC device that has been entered into its recipient table is　　back on line when it receives a heartbeat from the SC device.　　DO:　　 Send the unsolicited status and transa fuel dispenser ction messages to the SC that has come on-line.　　 Please note that fuel dispenser this event will cause every dispenser to do the same action so the　　 network could get busy .　　 Start sending unsolicited messages to the SC device as normal.　　5.4.3 Actions when a SC recognises that a Dispenser is off-line　　The SC recognises that the Dispenser device has gone off-line when it does not receive a　　heartbeat within the duration of 3 times the heartbeat interval (normally 3 times 10 seconds =　　30 seconds).　　DO:　　 Indicate to the system operator (cashier) that the Dispenser device has gone off-line.　　FP31_2.21 IFSF - STANDARD FORECOURT PROTOCOL June 2005　　 DISPENSER APPLICATION　　Page: 134　　5.4.4 Actions when a SC recognises that a Dispenser comes back on-line　　The SC recognises that the Dispenser device has come back on-line when it receive a　　heartbeat from the Dispenser Device.　　DO:　　 Request the Dispenser s status and transaction details.　　5.4.5 Correct Manner of removing a SC from the Network　　When a SC is to be removed from the network or taken off-line the following actions should　　be carried out:　　 Remove the SC s address from all dispensers Recipient Table.

says firmly. That is because all three candidates not only agree on what the main issues are—the economy and crime—but also largely agree on what needs to be done stimulate growth and get t fuel dispenser ough on criminals. So the election has become primarily a contest of credibility who can be trusted to follow through best on proposals that are basically quite similar? But the very consensus on the issues means that this election could bring about the sea-change in Mexican politics which many voters had hoped for when they elected Mr Fox. Under his minority administration, change did not come largely because he was unable fuel dispenser to persuade a divided Congress to pass much of his legislation. Now both fuel dispenser Mr Calderón and Mr López Obrador have begun talking openly of persuading some PRI deputies to form a governing coalition. Mexico is in sore need of structural reforms on many fronts the tax system, the energy sector (Pemex, the state oil monopoly, currently accounts for over one third of government revenue), the justice system, education and pensions, to name only those areas most in need of overhaul. If a coalition were formed, it might just be possible that the next president, be he Mr Calderón or Mr López Obrador, could push such changes through Congress. If so, whatever the outcome of the campaign, Mexico could end up as the real winner. © 2006 .  About sponsorship South-East Asia All serene Feb 23rd 2006 | BANGKOK From The Economist print edition AP Our correspondent is leaving South-East Asia after four years. He reports that politics and economics there have never seemed so smooth AS LAST year s statistics trickle in, it is becoming clear that almost all South-East Asia s big economies grew by over 5%. Governments around the region are forecasting much the same for 2006. If they are correct, this will be the third straight year