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.

ine bad effects of accuracy. 2. Pipeline noise Noise and tremble are not generated by pipe itself but hydraulic shock, pipe resonance and pressure pulse. Here explain, combining operation and maintenance of fuel dispense, these reason for noise and tremble 2.1 Hydraulic collision Hydraulic collision refers to the phenomenon in which oil pressure in pipeline is increased quickly as pipe switch open or close or liquid changing flow direction. Hydraulic collision could lead to pipeline noise, which are result from piston changing direction of measurement transducer and witching on or off pipe valve. Δρ= 12lv11+EoE·dδ (v2=0,t≤T) (2-10) Δρ= 12lv11+EoE·dδ ·Tt (v2=0,t≤T) (2-11) Δρ= 12lv11+EoE·dδ ( partial v2�?,t≤T) (2-12) Δρ= 12lv11+EoE·dδ ·Tt (partial v2�?,t≤T) (2-13) In above formulae: Δρ── increasing pressure value; υ1── previous velocity of flow υ2── latter velocity of flow T ── time that start from collision to reflect T=2la T ── changing time of velocity of flow fromυtoυ2 E0 ── elastic volume of fluid cubage E ── elastic modulus of pipeline d ── inner diameter of pipe δ── pipe thickness l ── diffused distance of shock wave a ── diffused speed of shock fuel dispenser wave The above formu fuel dispenser lae illustrate four kinds of stock pressure on pipe in corresponding operations in which switching on or off nozzle quickly or slowly. They also explain that slowly switch on and off nozzle generating less collision pressure than that of rapidly under a certain parameter of pipeline system of fuel dispenser. Similarly, it is applicable to stock noise. Therefore, user shall slowly turn on and off nozzle in operation so as to reduce hydraulic stock and noise, and prolong fuel life service of fuel dispenser. Most of manufacturers of fuel dispensers have mo fuel dispenser unted anti hydraulic stock device in hydraulic system in order to abate the effects to fuel dispensers.

16H -1FH Manufacturer specific fatal error　　 20H Error (general purpose).　　 MINOR　　 21H 22H Spare　　 ERROR　　 23H Configuration or Parameter error (Minor)　　 (WARNING)　　 24H Power supply error (warning).　　 25H Communication error (warning).　　 26H Pin Pad warning　　 27H MSR Card Reader warning　　 28H ICC card reader warning　　November 2004 IFSF - STANDARD FORECOURT PROTOCOL Version 2.00　　 CONTROLLER DEVICE APPLICATION　　Page: 22　　 29H Printer - Paper Low minor error　　 MINOR　　 2AH Printer Paper Out (when operation without printer allowed)　　 ERROR　　 2BH Printer - minor error Other　　 fuel dispenser (WARNING)　　 fuel dispenser 2CH Cashier display minor error　　 Continued ?　　 2DH Customer display minor error　　 2EH Keyboard defect　　 2FH Other input device defect (e.g. mouse signature pad microphone)　　 30H Other output device defect (e.g. speaker remote display)　　 31H Security breach defect fuel dispenser 　　 32H Environmental Control outside safe warning limits　

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