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.

erance not exceed ±0.3%，repeated measuring no more than 0.15% as fuel dispenser is operated within the flow ra fuel dispenser nge between maximum fuel dispenser flow-rate (Qmax) and minimum flow-rate (Qmin). Flux scope is also called measurable range --- between minimum measured value and maximum flow-rate within basic tolerance. The ratio of maximum flow rate to minimum flow rate is called measurable ratio. In model testing the value is 10 to 1. Accuracy testing is conducted at six flow points within the measurable range so as to get their tolerances. This relation between tolerance and flux is called the tolerance nature of flow meter. The less flow tolerance the better. Measurable range ratio is 10 to 1 as fuel dispenser being left factory, testing three flux points, that is, Qmax, 0.4 Qmax, 0.1 Qmax . However, the ratio in operation place is 5 to 1, only testing two flow points -- Qmax , 0.2 Qmax . Minimum measured volume testing Testing purpose is to assess indicative tolerance when refueling by minimum measured value. Relevant regulations stipulate that the minimum flow rate don’t surplus 5L as for a fuel dispenser with maximum flow rate no more than 60L. Its maximum tolerance in terms of minimum measured value don’t exceed ±0.5%, measurable repeatability no more than ±0.25%. Flow stoppage testing The testing is conducted in order to define the possible tolerance range that generated in refueling progress in which hydraulic flow stop suddenly due to some accidents like power cut. Vapor separator performance testing It is conducted to value the capacity of vapor separator how much vapor would be divided from oil. Vapor separator’s function is to ensure that media passing over flow meter should be in single direction without any foam or bubble. Otherwise, flow meter can’t get right value of measurement. Volume fluctuation testing The test is aimed at defining the hose’s inner cubage variability of fuel dispenser under maximum pressure condition. According to fuel dispenser’s working principal, hose always fuel dispenser

STANDARD FORECOURT PROTOCOL February 2006　　 COMMUN fuel dispenser ICATION SPECIFICATIO fuel dispenser N　　Page: 42　　 The correct acknowledgment would be　　 0208 1801 00 F3 0003 010000　　 Example 4: Write a heart beat interval of 30 seconds and a maximum block length of　　 64 Bytes. In this example a token of value 25 (19H) is used.　　 1801 0208 02 59 0008 0100 04 01 1E 05 01 40　　 The correct acknowledgment would be　　 0208 1801 00 F9 0003 010000　　 Example 5: Say we try to write a valid heart beat interval of 20 (14H) seconds but an　　 illegal value of block length. Say 229 (E5H) since the maximum allowed in IFSF is　　 228. The first data id is correct and the second is too large. In this example a token of　　 value 2 (02H) is used.　　 1801 0208 02 42 0008 0100 04 01 14 05 01 E5　　 The correct acknowledgment would be　　 0208 1801 00 E2 0007 010005 0400 0501　　 If we wrote it the other way around i.e. block length first and then heart beat interval.　　 Then the following write and acknowledge message would be generated. In this　　 example a token value of 3 (03H) is used.　　 1801 0208 02 43 0008 0100 05 01 E5 04 01 14　　 Acknowledgment 0208 1801 00 E3 0007 010005 0501 0400　　5.3 Read and Write Data Error Handling　　 When an appplication decides to read or write a message there is a definate sequence　　 (priority) to the error handling.This chapter concerns only the processing of data and　　 not commands. The priority sequence is as follows ?once the first error has been　　 detected no further error processing is required.　　5.3.1 Communication Layer Errors　　 Firstly with both read or write message an MS_Ack of 1 is returned if the recipient　　 fuel dispenser

ings. As more bacteria grow in an area, the amount of AHL increases, eventually reaching a concentration high fuel dispenser enough to trigger fuel dispenser behavioural changes. For example, when a pathogenic bacterium called Pseudomonas aeruginosa reaches a quorum, it starts to produce molecules called virulence factors that damage the cells of its host, liberating their contents so that the bacteria can feed. The bacteria also band together tightly in response to the appropriate AHL, and secrete a protective layer of complex sugar molecules that protect them from their surroundings. The result, known as a biofilm, is the source of many hospital-based infections, since biofilms are impervious to antibiotics. Dr Blackwell s group has built up “libraries�of several hundred AHLs, and has been screening them in laboratory cultures to test their effects on various species of bacteria. One aim of this screening is to find compounds that block communication in some species but leave others undisturbed. That is important, because not all bacteria that live in people are harmful. Indeed, some are beneficial. But stopping communication in a Petri dish is not the same as blocking it in a bacterium s natural environment. To find out if the new compounds can alter the course of infection in an animal, Dr Blackwell s group infected some cabbage white butterfly caterpillars with P. aeruginosa. Some of the caterpillars also received what she hoped was an appropriate AHL. After a week, nearly all of the animals infected with the bacteria alone were dead, whereas half of those that had been treated with the AHL survived. The new compounds are not yet ready for testing on people, according to Dr Blackwell. The dose rate needed to make them work in insects would be too much for people to tolerate, so some more design work is necessary. But if that can be done successfully, her first experiment will be to see—initially in mice—whether they can prevent burns from becoming infected. Nor is suppressing bacteria the only possi fuel dispenser