U209-B 8-digit electronic counter

U209-B 8-digit electronic counter

Features:

Power: DC12V

Total :8digits counting pulse width more than 40 ms

100% Factory Tested.

Packing:

Weight: Dimension:

150g/case of 1 70×32×42mm/case of 1

s to quickly switch off power supply circuit in case that the associated circuit, connected power and used in explosive gas atmosphere, generate spark or become hot due to short circuit. Therefore, a reliable and valid safety barrier is very important to intrinsic safety fuel dispenser. The traditional safety barrier, adopting diode safety barrier, current fuse, voltage stabilizing diode an fuel dispenser d limited current resistance, is difficult to applicable to simple fuel dispenser due to expensive cost, large cubage and long time of melt. Owing to reliable performance, cost-efficient, quick response, electric safety barrier adopted VMOS component is widely mounted in most fuel dispenser at home and abroad. Diagram 3-19: Safety barrier sketch map 2.5 Drive circuit of motor and solenoid valve Diagram 3-20: Sketch map of motor driver 2.6 Flux pulse converter (pulse sensor) Flux Pulse converter, also called pulse sensor, is used for converting the volume that discharged out of flow meter into pulse data so as to calculate in measuring CPU. At present, there are two kinds of popular pulse sensors in domestic market. One has double-way 30 pulses as per rotation of flow meter, the other double-way 50 pulses per rotation. Pulse sensor includes photoelectric sensor and Hall-effect Sensor. The circuit of popular photoelectric sensor is illustrated in Diagram 3-21 and 3-22. With the development of integrated circuit, a new kind of optical coupler is created, collecting the outside section of optical couple into inner so as to be simpler to use. Diagram 3-21: Photoelectric sensor circuit I Diagram 3-22: Photoelectric sensor circuit II 2.7 Operative switch Most manufacturers install operative switch on keyboard of fuel dispenser, though simple to technical solution, especial fuel dispenser ly in preventing dangerous area in where install switch, the life service of keyboard is unable to be ensured due to so frequent operation. Therefore, the best solution is to install a touch switch on nozzle bracket. Mechanical key swit fuel dispenser

RESUME_FP When the FP is released again by the same device (for exception see data variable　　 Suspend_Contr_Id) the same transaction continues from where it was paused. The　　 FP returns to the FUELLING state.　　 PCD Comment:　　 If the proprietary pump protocol doesn t allow a susp fuel dispenser ended pump to be re-started　　 then the PCD should NACK the Resume_FP command (MS_ACK=5 Data-　　 ACK=5) and stay in the SUSPENDED FUELLING state.　　 Action: The FP receives the Resume_FP command.　　 Action : The FP state change is send as an unsolicited data array　　 FP_Status_Message .　　 Action : The FP sends an unsolicited data array FP_Error_Type_Mess　　 with the minor error Fuelling_Resumed to the CD and the error　　 is stored within TR_Error_Code.　　 NOZZLE-DOWN The customer finishes the fuelling by returning the nozzle.　　 The transaction is stored in the transaction buffer. The FP moves to the IDLE state.　　 Action : The FP state change is send as an unsolicited data array　　 FP_Status_Message .　　 FILL-TIME-OUT The FP times out when the duration of the fuelling operation exceeds the maximum　　 time allowed for that product (Max_Fill_Time).　　 The transaction is stored in the transaction buffer. The FP moves to the IDLE state.　　 fuel dispenser PCD Comment:　　 If the proprietary pump protocol doesn t support the Max_Fill_Time then the PCD　　 will have to create its own watchdog timer f fuel dispenser

to reduce this unnecessary power consumption, called “standby power� As in many other areas of environmental policy, the state of California is leading the way. On January 1st the California Energy Commission introduced mandatory standby requirements for various electronic devices—the first such obligatory regulations in the world. This is due in no small part to the efforts of Alan Me fuel dispenser ier, a staff scientist at the Lawrence Berkeley National Laboratory (LBNL) in Berkeley, California. In the 1990s he noticed a proliferation in the number of household appliances that are never fully switched off, but spend most of the time in a standby mode, ready to spring into action when needed. The convenience of being able to switch on your television from the sofa using a remote control, in short, has a cost, since some circuits in the television must remain active, watching for signals from the remote control. Added up on a nationwide or global scale, Dr Meier realised, the wasted energy must be staggering. “We re moving from an electromechanical world that s on and off to an electronic world that s never off,�he says. He and his colleagues at LBNL set out to quantify the scale of the problem. In 1998 they released an initial study which estimated that standby power accounted for approximately 5% of total residential electricity consumption in America, “adding up to more than $3 billion in annual energy costs� According to America s Department of Energy, national residential electricity consumption in 2004 was 1.29 billion megawatt hours (MWh)�% of which is 64m MWh. The wasted energy, in other words, is equivalent to the output of 18 typical power stations. This figure, however, was based on estimates. So Dr Meier and his team went on to measure standby-power consu fuel dispenser mption directly, in an empirical study. Their results, published in 2000, revealed that standby power accounted for as much as 10% of household power-consumption in some cases. That same year, a similar study in France f fuel dispenser