COMPANY INTRODUCE

COMPANY INTRODUCE

China Hongyang Group, is an integrated enterprise with the research & development, production and marketing of Fuel Dispenser and related accessories as well as service station concerning equipments. It concentrates on the relative manufacture & services of filling station such as Hongyang tax control Fuel dispenser, IC Card fuel dispenser, manage system of network for stations, submerge pump and liquid level devise. China Hongyang Group, designed supplier of SinoPec and PetrolChina, our HONGYANG products have been sold to over 50 countries in South-east Asia, Mid-east, Africa, Europe and well received in their markets.

erally is mounted centrifugal pump installed in tank. The inlet pressure of fuel dispenser with submersible pump is higher than atmospheric pressure. Submersible pump consists of pump, connecting pipeline and controller. The appearance of submersible pump and its position in tank is showed in diagram 2-10. Diagram 2-10: Submersible pump fuel dispenser position and figure Submersible pump is composed of motor and centrifugal pump. Pump motor includes electromotor, wiring panel, overheat protector and pipeline; centrifugal pump has the elements of filter, anti-static subassembly, impeller and pump axis. Diagram 2-11: Main structure of submersible pump Connecting pipeline has two types of fixed and stretched. The former type consists of oil pipe, vapor-recovery pipe, lead pipe and wire. The later type is formed by oil pipe, vapor-recovery pipe, adjusting nut, lead pipe and motor wire. Controller is divided as two parts, upper and lower. Upper part have these components junction box, electric bridge, capacitor, exhausting plug, check valve, pressure adjustor, testing interface of exhaustion and pressure, leakage monitor of pipe. However, lower part is constituted by pipe jointer, lead terminals, pump holder, etc. By function, submersible pump is classified as four categories, namely, standard type, enhanced type, changing-frequency type and large flow type. The standard type access to general requirements, but the enhanced type not only increase flux than standard type, but also available to mix liquid of gasoline with alcohol. The changing- frequency submersible pump adopt pipe pressure to judge flux. Given a situation in inefficient flux and low pressure the electric frequency of motor would tune high through computer, so as to elevate rotate speed and increase flux. Contrarily, to reduce electric frequency and rotate speed as pipe pressure being low, adjusting appropriate flowage. The large flow type is adap fuel dispenser ted in filing station in where needs quickly operation. Some submersible pump has the flow speed of more fuel dispenser

Write MO　　 Data Element Name　　 Description Type in State　　 (Values)　　 7 asc6 W(1-3) M　〠fuel dispenser € Maint_Password　　 (07H)　　 This is the password required to force the TP into　　 maintenance mode. It needs to be issued before the　　 Enter_Maint_Mode command. The TLG must compare　　 the new password with the currently stored password. If　　 they are the same then an Enter_Maint_Mode command　　 will be accepted within the 5 minute timeout period.　　 Note that in the case that a write action occurs in the　　 Inoperative or Operative states with a Maint_Password　　 different to the stored password the TLG must reject the　　 attempt with a Data_Ack value 6 (Command not　　 accepted).　　 Note that no error is generated when Maint_Password is　　 consecutively written.　　 Also note that a write action for Maint_Password when in　　 maintenance mode results in the updating of the password　　 value. The sequence of write actions for a change in　　 password value is therefore the following:　　 1st Maint_Password (old value)　　 2nd Enter_Maint_Mode　　 3rd Maint_Password (new value)　　 4th Exit_Maint_Mode　　 Also note that the password cannot be read back in any of　　 the TP states to prevent tampering with the TP setup. The　　 manufacturer of the tank gauging system should therefore　　 fuel dispenser take care of an emergency pro fuel dispenser

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