Shanghai fisherman multihead weigher table operation steps description steps

Author: Smartweigh–Multihead Weighter

The electronic weighbridge is mainly composed of parts such as carrier, weighing display instrument (hereinafter referred to as multihead weigher), weight sensor (hereinafter referred to as sensor), connectors, limit switch equipment and wiring terminals, and can also be equipped with a large-screen display for copying , electronic computers and peripheral equipment such as adjustable regulated power supplies. 1. Maintenance of the weighing platform (more important) 1.1. There should not be gravel, coal and other dirty things stuck in the gap around the weighing platform. 1.2. Always check whether the clearance of the limit switch is valid, and the anchor bolt of the limit switch and the scale body should not be bumped and touched.

1.3. The joints should be maintained once every six months, and the top of the support head should be coated with unsalted butter. 1.4. It is forbidden to carry out arc welding work on the weighing platform. If it is necessary to carry out arc welding work on the weighing platform. Be sure to pay attention to the following aspects: (Disconnect the communication cable and the weighing display information control board; the ground wire of arc welding must be set around the welding position and firmly touch the scale body; do not apply The sensor becomes a part of the arc welding control loop), which is weighed and placed on the surface of the carrier table. Under the action of the force, the force is transmitted to the weight sensor according to the carrier, so that the weight sensor polyurethane elastomer causes the weight sensor. Deformation, the bridge circuit of the strain gauge pasted on the polyurethane elastomer is unbalanced, and the electronic signal proportional to the net weight value is output, and the data signal is enlarged by the linear amplifier.

The internal A/D is converted into an analog signal, and the net weight data signal is displayed immediately after the net weight data signal is solved by the microprocessor (cpu) of the multihead weigher. After the copier is equipped, the weighing data information can be printed and recorded. If it is equipped with an electronic computer, the metrological verification data information can be entered into the electronic computer intelligent management system to carry out information management. 2. 2. Maintenance of the weighing display information control panel 2.1. Always check whether the wiring is loose, broken, and whether the wire joints are firm.

2.2. When the weighing display information control panel is not needed for a long time (such as more than one month), the plug-in inspection should be carried out according to the natural environment standard to prevent the reliability of moisture return or other poor vapor corrosion. 2.3. The weighing display information control panel prevents it from approaching the pyrogen and vibration source. 2.4. There is no need for flammable vapor or smoke in the natural environment.

2.5. AC current cannot be connected to the same live wire and zero wire of the weighing display information control panel, such as electronic doorbells. 2.6. When the weighing display information control panel is not needed for a long time, when the fuse wire is replaced, the parts are moved or dust, etc., try to disconnect the switching power supply. 2.7. If there is a common fault on the weighing display information control panel, the power should be quickly turned off, and then the technical professional unit and staff should be notified to carry out inspection and sorting.

2.8. Both the weighing staff and the multihead weigher maintenance staff need to learn and train according to the profession before they can practice the actual operation and maintenance. 3. Remove and replace the sensor 3.1. Open the upper back cover of the sensor (destroyed), lift the weighing platform with a hydraulic jack, and remove the grounding wire of the sensor. 3.2. Open the terminal and get rid of the damaged sensor cable and terminal.

Pull out the cable at the sensor end. Note: When the wire is drawn, an additional wire is attached to the scale body, so that when the new sensor is replaced, the cable can pass through the regenerating scale body and enter the terminal. 3.3. Referring to the method of the second item, pass the sensor cable through the regenerating scale body to the connection terminal.

3.4. According to the wiring method, fix each copper core cable of the cable on the matching terminal of the terminal. 3.5. Loosen the hydraulic jack, put the weighing platform upright, and cover the rear cover. 3.6. After replacing the sensor, the electronic truck scale must be set and calibrated again.

3.7. After the sensor is installed, its unnecessary cables should be bundled and placed in bundles, and cannot be placed on the basic road immediately. 3.8. In order to ensure the consistency and tolerance of the sensor, the sensor cable should not be disconnected casually. 3.9. During the whole process of installation and disassembly, there should be no scratches, bumps and bumps on the sensor, and the cables should be well maintained.

4. The gaps around the electronic platform for computer maintenance should not be jammed with dirt, and the theme activities are easy. Always clean the scale cabinet countertop and keep it clean (Jianyi: paint on the surface of the scale once a year). The joints are maintained once every six months.

Part of the daily maintenance and maintenance of Dongguan electronic platform scales: 1. After cleaning the top of the support head, wipe it with unsalted butter. 4. It should be pumped out or transported through the drainage pipeline immediately with a water pump. According to the load, the force is transmitted to the weight sensor, so that the polyurethane elastomer of the weight sensor is deformed, and the bridge of the strain gauge pasted on the polyurethane elastomer is unbalanced, and an electronic signal proportional to the net weight value is output. The data signal becomes larger.

1 The internal A/D is converted into an analog signal. It can also choose to copy the large-screen display limit switch equipment and wiring terminals and other components to form the connection weight sensor (hereinafter referred to as the sensor) weighing display instrument (hereinafter referred to as the multihead weigher). The microprocessor (CPU) displays the net weight data information immediately after solving the net weight data signal. Peripherals such as electronic computers and adjustable regulated power supplies.

The principle is called hanging objects or light trucks placed on the surface of the carrier table. After the copier is equipped under the action of force, the weighing data information can be printed and recorded. If it is equipped with an electronic computer, the measurement verification data information can be entered into the electronic computer intelligent management system. Carry out information management. The operation method of the Sino-African multihead weigher meter in Yuxin Town, Shanghai shows that the process 4.1 ensures that the grounding protection of the electronic computer is excellent. 4.2. It is forbidden to switch the power supply frequently, move and disassemble the computer at will.

4.3. Electronic computers should prevent water resources and strong magnetic induction from interfering with each other. 4.4. It is forbidden to use external hard disks indiscriminately to avoid feeling ill. 4.5. It is forbidden to hit the computer keyboard with hard blocks, such as screwdrivers.

4.6. The host room should be kept clean, and the temperature should be in accordance with the server instructions. 4.7. The actual operating staff can only enter the post after learning and training. 5. 5.1 Server Maintenance 5.1 After electronic installation, materials such as instructions for use, certificate of conformity, installation drawings, etc. should be properly stored, and they can be delivered for use after the local metrological verification unit or an approved metrological verification unit has met the metrological verification standards.

5.2. Before the system software is powered on, be sure to check whether the grounding system of the switching power supply is reliable; after get off work, be sure to disconnect the switching power supply. 5.3. Before electronic application, it is necessary to check whether the scale body is flexible and whether the characteristics of the supporting facilities are good. 5.4. The weighing display information control panel must start heating first, usually about 30 minutes.

5.5. In order to ensure the accuracy of measurement verification, anti-shock equipment is required. During the arc welding of electronic peripherals, it is forbidden to use the weighing platform as a neutral grounding device to prevent damage to electrical components. 5.6. For the ground balance installed in the field, the drainage pipeline equipment in the deep foundation pit should be regularly maintained to prevent blockage. 5.7. It is necessary to maintain the dryness in the terminal. Once the terminal has moist air and water droplets infiltrated, it can be dried with a hair dryer.

5.8. In order to ensure the normal measurement and verification of all electronic equipment, it should be calibrated on time. 5.9. There is no need to have an impact condition when lifting and measuring the hanging object; when the measuring and verifying vehicle intercepts the hanging object, it cannot exceed the rated value of the system software. 5.10. The axle load of the electronic truck scale is related to factors such as the volume of the sensor and the distance between the support points of the sensor.

Generally, electronic truck scales are strictly prohibited from being overbalanced by short wheelbase vehicles such as forklifts with large weighing. 5.11. The actual operation staff of the weigher and the maintenance staff of the multihead weigher must read the instructions and related technical documents thoroughly before they can enter the post for actual operation. 6. Inspection and removal of common faults 6.1. Search for common fault locations: When the electronic truck scale cannot work due to common faults, the first thing to do is to find out where the common faults occur.

The easy way is to rely on the phone emulator to search. The process is as follows: get rid of the communication cable from the terminal to the multihead weigher, insert the power socket of the mobile phone simulator (9-pin D-type flat power socket) into the socket J1 of the weighing display information control board, connect the switching power supply, and watch the weighing Whether everything is normal in the display information control panel indicates that the common fault is in the weighing platform. If the weighing display information control panel is abnormal in operation, the common fault is in the weighing display. The removal of its common faults must be carried out by professional testing staff.

6.2. Analysis of the common faults of the weighing platform: (1) First check the terminals to see if there is water vapor intrusion. If there is water vapor, use ethanol to clean it, then dry it with a hair dryer to clean the interior. (2) Search the wiring for short-circuit faults. Use a multimeter on the terminal to measure the resistance of the shielded cable and other lines for short-circuit fault conditions.

If a short-circuit fault is found, the cable must be replaced. If there is no problem, search again according to the following procedure. (3) The common fault process of the search sensor is as follows: a. Use a digital multimeter on the terminal to check the resistance between the positive (E+) and negative (E-) of the switching power supply, and the resistance value is about 780Ω/the number of sensors. b. Disconnect the inductor for many times, and accurately measure the characteristic impedance value between the positive and negative encouraging terminals or the positive and negative output terminals by means of a to see if it matches the resistance value of the certificate of conformity, and find the damaged inductor.

Naturally, you can also press Next to search. c. Place 1/(n-1) large weighing standard weights on each bearing key of the weighing platform one after another. If any bearing key is found to have the wrong range, it means that there is something wrong with the sensor at that point, and it should be Carry out replacement. Note: n is the number of sensors.

Demonstration process of operation method of multihead weigher table in Shanghai in Yuxin Town·Modular design weighing platform, U-shaped beam structure, good compressive strength, good tolerance matching, configurable electronic computer intelligent management system The weighing platform structure adopts U-shaped cross-section cold-drawn steel welding, overall strength stiffness, torsion resistance The strength and stiffness of the countertops and cabinets have been greatly improved. The scale design scheme is modularized, standardized, and universal, and can form a variety of specifications and models at will. This series of products adopts high-precision bridge-type or column-type weight sensors and weighing display instruments with rich functions and strong storage functions to form an intelligent weighing measurement verification system software [automatic weighing system software].

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