Do you know how small fuel dispenser is to set it?

For the method of setting a small marine fuel dispensers functions may not be used by users may be unfamiliar, and therefore a tripod Machinery for everyone to do a brief introduction:
1: Price set
In standby mode, press the [Unit] key, the unit price of the highest priced LCD display digits flash, enter the value you want to set the unit price, press the [ENTER] key to end the unit price is set, then the unit price unit price LCD display is changed to value set. retail fuel dispensers off the main power, and then turn the fuel dispenser power enters the standby state.
In the setting process, press [Up] key forward displacement of the flashing digit, press [Down] button, the flashing digit backward shift.
Price setting range: 0.01 to 99.99.
Note: Price is set to enter another approach is in the standby mode, press [function] button, the middle two horizontal oil LCD flashes, press [1] key, then press the  key to enter the unit price , the operation above.
2: The system version number View
In standby mode, press  key, the amount of LCD displays [- - - - - -], fuel LCD display [- - - - - -] in the middle of two horizontal lines flashing. Press button, then press the key to enter the system version number to check the status, the display changes to the following states. Where the lowest two keyboard display flashes, the two systems is the version number, press the  key to exit the system version number to check the status.
3: Accumulated oil is cleared
In standby mode, press and hold the [cumulative] key does not let go, and then press the [Reset] key, the accumulated oil is cleared.
Of particular note is the use of small fuel dispenser before various functions set in the standby state, after setting is completed, turn off the main power refueling, then re-open the dispenser power enters the standby state.

Electronic dispenser installed before use to do the work

Now more and more industrial and mining enterprises, oil vehicles and the need to use a small fuel dispenser refueling equipment, its lightweight and flexible, and easy to carry more of the users of all ages. However, many users in the purchase of small portable fuel dispenser, due to a defect on the knowledge or skills, do not know how to install and use a tripod for this machine to give you guidance on January:
1. Install the transparent tube: Transparent tube is used to see if there is full and can not have bubbles, otherwise it will affect the accuracy of the measurement. The transparent tube connected cng fuel dispenser into port, the other end of the filter, and fixed by hoops.
2. The activities of the two black tubing connector: Connect one end of refueling guns, and the other end connected to the electronic dispenser. Attention must be sealed to prevent oil spills, leaks.
3. energized: positive and negative poles, the positive is red clip, clip the negative is black, and the corresponding power supply. Note To ensure contact with a solid, otherwise the computer memory will be wrong.
Press "system is cleared when the pipe is full of oil, press the" Stop Go "after; 4. the first refueling, press the" Start refueling "button, open the grease guns, since there is no oil pipeline, the air flow will be a few counts "button to be cleared. This concludes the entire fuel dispenser installation process.

Fuel fuel dispenser common cheating methods are the following

a. Deliberately did not return to zero. Cheating will be transferred to the fuel dispenser automatic zeroing means critical state, no oil pressure at the gun or hand means straining hard to go back to zero, resulting in cumulative number of tables in front.
b. Adjust meter displacement adjusting device. Some gas stations on the displacement meter fuel dispenser adjustment cover lid seals unauthorized removal or pry loose the line drawn After adjustment, turn the wire through the clamp; and some of the lines to stay too long, seals do not need to move, you can adjust the displacement of the cover is removed, make adjustments, can reduce the amount of oil heavy duty fuel dispenser pay 1-5 percent.
c. Hand dial counter digital disc. Some gas stations will be counter glass and the inner surface of the bezel auto fuel dispenser unloaded, while the side facing the customer does not unload. When refueling, a person standing beside the fuel dispenser struck counter digital disc, struck tens refueling capacity, ranging from toggle to single digits.
d. Replace the bevel gear counter spindle. Various types of fuel dispenser, bevel gears its counter spindle geometry and modulus are not the same, usually 20 teeth, 25 teeth. Bevel gear after criminals will be replaced, a tooth for each additional, less paid customer 4-5 percent oil.

fuel dispenser Notes

(1) Do the two additional branch line in the tank calibration method pipeline.
(2) Do the two tankers a common suction line branch oil, special circumstances can be added after the oil check before branch.
(3) the storage tank calibration methods suction pipe flanges are not allowed to use oil and rubber mats.
(4) After installing the new pipeline, should be washed clean, debris and sediment inside the tube, in order to avoid debris into the oil-damaged parts; and subject to strict pressure test to confirm no leakage after the installation of the tanker, in order to avoid measurement and are not allowed to use the catastrophic consequences of oil spills.

fuel dispenser maintenance

(1) machine pump tanker oil separator that has the filter, which is made of copper mesh nets and blankets composed of a triangular side wall separator can remove the filter cover. Combination pump dispenser filters installed in the inlet. Submersible pump type automatic tank gauge systems with a special filter cartridge, open its cover to remove the filter. Filter regularly (at least once a month) cleaning with gasoline copper mesh cover, damage should be replaced, and remove dirt oil inside the machine, in order to protect the pump and flow meter.
(2) the pressure relief valve on the pump adjustment screw for adjusting the pump, thereby regulating the discharge of oil tank monitoring system. It has been adjusted at the factory. The long-term use, such as discharge oil declined, can the adjustment screw to tighten in order to increase the pressure of the pump, but not more than 0.3MPa, the exhaust oil to meet the requirements.
(3) a combination of a pump dispenser is only suitable for underground tanks, such as the use of high tank calibration software, exhaust pipe Mao phenomenon occurs, then be sure the exhaust pipe blocked.
(4) To avoid the use of oil gun oil gun filler pipe tapping is not normal operating oil containers, etc. by pressing the switch, to avoid damage to the oil gun, causing oil spills. Check periodically tighten the screws on the stopper on the filler pipe to prevent the injection tubing roots loose, damaged.
(5) Adjust the machine accuracy, according to relevant regulations.
(6) Check the electrical part must cut off the power, should not live overhaul. Open the box do not damage the surface explosion proof. Dust explosion cavity foreign body should re-install clean up clean, the cable seal should good, metal pads, gaskets can not be lost, no shortage of the number of screws, tighten the reliable, to ensure explosion-proof electrical component.

Several questions about the test the temperature of the fuel dispenser

1. Selection of the thermometer. JJG443-2006 auxiliary equipment requirements thermometer measuring range is -25 ℃ ~ 55 ℃, minimum scale value 0.2 ℃. But now most of the measurement technology used in the practical work agencies inexpensive glass thermometer, this thermometer has the following defects: ⑴ breakable glass thermometer; ⑵ glass thermometer to measure the internal oil temperature gauge is not convenient; ⑶ glass thermometer bulb reaction slower. It is therefore recommended to select digital display platinum resistance thermometer minimum scale value 0.2 ℃, the measurement range of -30 ℃ ~ 60 ℃, the use of platinum resistance temperature sensor, built-in battery power supply, the length (50 ~ 70) cm stainless steel tube protection, not damaged, eye-catching display, rapid, accurate and convenient.
2. Temperature measurements.
2.1 muzzle oil temperature measurement. When measuring oil muzzle temperature, oil oiling the metal gauges must always flow from temperature thermometer segment too, the oil temperature muzzle distance about 1cm, when the thermometer showing the value of steady and rapid reading (or cng fuel dispenser indication When the measurement reaches 50% to 70% of metal gauges capacity), the recording data.
2.2 Metal car fuel dispenser oil temperature measurement. When measuring the oil temperature gauge metal, glass thermometer, thermometer upper line of rope oil, temperature gauge metal segment can reach the central limit (which can be a stick in the other end of the rope, slightly longer than the overflow cover diameter measurement gauges prevent metal thermometer fall), holding a rope into metal thermometer gauge, temperature gauge metal middle segment arrives, after the end (3 ~ 5) min thermometer bulb section before was quickly exposed reading recorded data.
Another approach: When the metal gauges measuring emissions of oil, when oil into about half of the measured temperature in the vessel; or when Metal Tank discharge of oil, in a pitch gauge thermometer bulb row It was measured at about 1cm mouth until the thermometer shows stable reading value, which replaces the oil inside the metal gauges.

Hydraulic piston pump closed power liquid system

Because of the small power liquid tank, the system is suitable for oil well, offshore pumping well and densely populated area. For example, in California, the United States, fuel card management system , because many wells located in the towns and offshore, so widely used closed system. In most cases, the closed hydrodynamic system uses water as the power liquid, because of the small friction, the small risk and the little influence on the environment.

However, the use of water as power, automatic fuel dispenser need to add lubricant, and the need for anti-corrosion treatment, these will increase the cost of production management.

Hydraulic piston pump stroke

The main control valve is at top dead center. High pressure power liquid from the central tubing through the channel a into the liquid motive cylinder. The main control valve blocked channel B, hydraulic piston pump , the high-pressure power fluid can not enter the cylinder hydraulic motor.

The annular space liquid motive cylinder through the channel of D, main control
valve spool of central h and extraction of crude oil to communicate. In the fluid motive, the pressure difference of the cylinder, fuel dispenser pumps ,the liquid motive piston drives the piston upward movement of the pump.

The spent hydrodynamic fluid and the extracted crude oil were raised to the ground after the tank was worked in the cylinder.. When the piston rod close to the top dead center, hand gasoline pump and the lower control slot f the main control valve spool chamber and extraction of the oil phase communication, the main control valve spool were pushed to the bottom dead center, and the motive fluid to start into the next stroke, punching process will come to an end.