U104-A 3-phase Connection

U104-A 3-phase Connection

This type of meter is used to fuel dispensers for measurement of pressurized oil.

Materials:

Body: Aluminum (Spray-Painted)

Package:

Net Weight:

1.7kg/case of 1

Gross Weight: 1.9kg/case of 1

Dimension: 36x15x15cm/case of 1

ank and fuel dispenser. It is incomprehensive to think that the higher vacuum pressure in inlet the better performance. Here is vacuum pressure of pump inlet formula: PZ = Pa－P1= P gh＋P [(υ1)2/2 ] = P ghf (2-9) PZ ── vacuum pressure of pump inlet Pa── absolute atmospheric pressure P1── absolute pressure of pump inlet g── acceleration of gravity h── height from pump inlet to oil level in tank υ1── velocity of pump inlet hf── energy loss in pipe from tank to pump inlet from formula 2-9, there are three exterior conditions depend vacuum pressure of pump: pressure needed to lift oil, σgh; the pressure that used to increase flow velocity, P [(υ1)2/2 ]; the pressure loss in pipeline, P ghf . Once oil contains air, along with pressure decrease, more air fuel dispenser is separated. So dose that along with inlet vacuum pressure increases. Under there conditions, cavitation would occur in pipeline, causing pump’s normal operation. In order to prevent above disadvantage effects, pay much attentions to installation of pipeline: ①tank should not be burred too deeply, the vertical distance from bottom valve to fuel dispenser no more than 4m, for example, regulated by some manufacturers with the purpose to prevent higher vacuum pressure of pump inlet; �?the diameter of pipe shou fuel dispenser ld not too small. As flow velocity correlate to section of pipeline, vacuum pressure at inlet of pump will be increased when high velocity in smaller diameter pipe; adopt as few as elbow in pipeline, preventing the connection with different diameter pipe, adopt pipe with smooth pipe wall. Rational installation of pipeline between tank and fuel dispenser benefit avoiding cavition and reduce vacuum pressure of pump inlet, which is also conducive to deduct business cost and power consumption. The unreasonable pipeline installation not only results in suction difficulty but also easily generate no suction in hot whether, increasing power loss. The wrong installation also leads to larg fuel dispenser

........................................................................................ 29　　 4.5.2 Recipient Address Table............................................................................................. 29　　 4.5.3 Heartbeat ................................................................................................................. 35　　4.6 DATA ENCRYPTION........................................................................................................ 36　　4.6.1 COPT DATA ENCRYPTION ............................................................................................... 36　　4.7 UNLOCKING................................................................................................................. 40　　5 IMPLEMENTAT fuel dispenser ION GUIDELINES RECOMMENDATIONS ......................................... 41　　5.1 ACTIONS WHEN A DEVICE RECOGNISES THAT A SC IS OFF-LINE................................................. 41　　5.2 IFSF MESSAGE EXAMPLES ............................................................................................... 41　　 5.2.1 Read and Answer Messages ....................................................................................... 41　　 5.2.2 Write and Acknowledge Mess fuel dispenser ages .............................................................................. 41　　5.3 READ AND WRITE DATA ERROR HANDLING .......................................................................... 42　　 5.3.1 Communication Layer Errors ...................................................................................... 42　　 5.3.2 Application Data Layer Errors ..................................................................................... 43　　FP2_1.88 IFSF STANDARD FORECOURT PROTOCOL December 2004　　 COMMU fuel dispenser

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