1、 Electronic scales Electronic scales are weighing technology in a new type of instrument is widely used in various occasions. Electronic scales and mechanical scales have more small size, light weight, simple structure, low price and practical value of strong, convenient maintenance and so on can be
2、 in a variety of environmental work, the weight of the signal can be Remote, the weight of display is easy to implement digital, easy-to-computer network, production automation, higher labor productivity. Scale labels in the supermarket is in the application of face value. A small label contains: na
3、me, price, weight, etc. 11 list in this small electronic label. Greatly accelerated the use of label machine sales pace, but also convenient for customers. Top barcode labels have many remarkable features of scale, Ethernet feature makes the management more convenient. Electronic Scale Classificatio
4、n (scales can be divided into mechanical and electronic type) 1 How it works: electronic works in electronic components (weighing sensor, AD conversion circuit, microcontroller circuits, display circuit, keyboard circuitry, communications interface circuits, regulated power supply circuit circuit. 2
5、 using the function: electronic weighing the use of modern sensor technology, electronics and computer technology integration, electronic weighing devices, in order to meet and solve real lifes fast, accurate, continuous, automatic weighing requirements, while effectively eliminating human error, to
6、 make it more in line with the management of legal metrology and industrial production process control applications. 3. Three health scales are weighing the use of features in a category (divided into mechanical and electronic), inexpensive, it can help people to effectively monitor their own body w
7、eight changes, new products also can detect their fat content, but also Some human-oriented subsidiary functions. May not be part of measuring equipment. 4 Electronic Scale is a measurement of the state compulsory test apparatus, and his qualified products are test indexing the value of D values of
8、e and subdivision standards, is subject to the protection of the national metrology products. In the electronic weighing there is a category called human scale products, which can test in the measurement sector, weighing very precise. Block diagram interpretation of the principle of electronic balan
9、ce The first part of the electronic scale principle block diagram: Program K / B (button) Fx Sensors OP Zoom A / D converter CPU display driver display memory Workflow Note: When an object on the pan when the pressure facilities to the sensor that occurred deformation, so that resistance to change,
10、while the use of excitation voltage changes, the output of a change in analog signal. This signal amplification by the amplifier output to the ADC. Converted to facilitate the processing of the digital signal output to the CPU operator control. CPU under the keyboard commands and program output to d
11、isplay this result. Until the show such a result. The second part of the scale of the classification: 1. According to principles of points: E-scale mechanical scale mechanical and electrical integration scales 2. According to the functions sub: Counting Scales Weighing Scale Pricing Scale 3. Purpose
12、: Industrial Commercial Scales Special Scales Balance The third part of the scale types: 1. The full name of the desktop Scale refers to the volume of less than 30Kg electronic scale 2. The full name of platform scale refers to the volume within the 30-300Kg Electronic Scale 3. Loadometer full name
13、refers to the volume of more than 300Kg Electronic Scale 4. Precision Balance 4th Part of the accuracy of classification: I Class: Special scales precision 1 / 10 Wan II level: high-precision scale 1 / 10000 precision of 1 / 100,000 III: the accuracy of scale 1 / 1000 precision of 1 / 10000 Class IV
14、: Common Scale 1 / 100 precision of 1 / 1000 Part V of professional terminology: 1. Maximum weighing: an electron balance, excluding tare weight, the maximum load can weigh； 2. Minimum weigh: a electronic scales below the value that would have occurred when a relatively error； 3. safe load: 120% of
15、the normal weighing range； 4. Rated load: normal weighing range； 5. permissible error: class test when the maximum deviation； 6. a sense of quantity: a single electronic scales can show the smallest scale； usually d to represent； 7. analytic capacity: a function with a count of the electronic scales
16、, can distinguish the smallest scale； 8. Resolution: a counting function with an electronic scale, the internal capacity of a Resolution of a parameter； 9. Warm-up time: a scale used to achieve the targets of the time； 10. Accuracy: The full name of a sense of volume and volume ratios； 11. electroni
17、c scale use of environmental temperature: -10 degrees Celsius to 40 degrees Celsius 12. platform scale The table size: 25cm X 30cm 30cm X 40cm 40cm X 50cm 42cm X 52cm 45cm X 60cm Part VI electronic scale features: 1. To achieve long-distance operations； 2. To achieve automatic control； 3. Figures sh
18、ow that an intuitive, reduce human error； 4. High accuracy and resolution strong； 5. Weighing range is wide； 6 . unique features: buckle weight, withholding weight, zero, accumulated, warning, etc.； 7. maintenance simple； 8. size is small； 9. installation, calibration simple； 10. special industry, c
19、an be accessed by the printer or computer-driven； 11. Intelligent electronic scale, quick reaction, high efficiency； Part VII of the electronic scale inspection process: 1. First, the overall examination: whether the wear and tear； 2. Whether the boot: the boot sequence is from 0 to 9 in turn shows
20、that figures are vague, can zero； 3. Whether the backlight ； 4. with the weight tests in weighing； 5. chargers is intact, can use； 6. parts are complete； Part VIII sensor type: 1. Resistive: affordable, high accuracy, widely used； 2. Capacitive: small size, low precision； 3. Maglev-style: special hi
21、gh-precision, high cost； 4. Hydraulic formula: the current the market has been eliminated； Display Type: 1.LCD (liquid crystal display): free electricity, energy-saving, with backlight； 2.LED: free electricity, power consumption, very bright； 3. Lamp: electricity, power consumption , high； K / B (bu
22、tton) type: 1. film button: contact type； 2. mechanical buttons: made up of many individual combinations of keys together； sensor characteristics: 1. rated load； 2. output sensitivity； 3. non-linear； 4. hysteresis； 5. repeatable； 6. creep； 7. 12:00 output effects； 8. rated output temperature； 9. 12:
23、00 input； 10. input impedance； 11. output impedance； 12. Insulation Resistance ； 13. to allow excitation voltage； (5-18V) Part IX sensor damaged phenomenon: 1. Weighing not allowed； 2. Shows no return to zero； 3. Shows the number of bounce to judge the sensor + E,-E, + S,-S 1. The first to use resis
24、tance profile measurement 4-line 22 This resistance value, a total of 6 groups. The case of 400-450, compared with Europe + E,-E； if it is 350 in Europe, compared to + S,-S； for the 290 in Europe, compared to R-arm； 2. + E,-E terminated on the + 1.5V voltage Sensor correctly to exert a pressure, suc
25、h as the output + _S increase, then the red table pens as + S, the contrary-S； 10th part of the high-precision counting scale features: 1.Kg/Ib unit conversion functions； 2. 12:00 display range adjustment function (GLH series does not) 3. Sampling speed adjustment function； 4. There are 10 groups me
26、mory function singlet； 5. may be at the same time the weight, quantity, the cumulative function (GLH only the number of cumulative) 6. can set the weight, the maximum amount of warning function； 7. automatic zero tracking, temperature linear correction； 8. deduction of withholding heavy weight and f
27、unction； 9. Standby function； 10. there is zero shows zero tracking range and scope； 11. there is the battery voltage control to limit the function； Electronic scales are weighing technology in a new type of instrument is widely used in various occasions. Electronic scales and mechanical scales have
28、 more small size, light weight, simple structure, low price and practical value of strong, convenient maintenance and so on can be in a variety of environmental work, the weight of the signal can be Remote, the weight of display is easy to implement digital, easy-to-computer networking, process auto
29、mation of production and improve labor productivity. Electronic Scale also has an automatic zero tracking, overload display of self-extinguishing characteristics. Mechanical scales, floor scale / land in the value (car value), weigh-bridges and other fitted force-sensitive sensors and microcomputer-
30、controlled intelligent weighing instruments become intelligent digital electrical and mechanical balance (or the mechanical and electrical dual-use scales), to improve the mechanical balance of the measurement accuracy, with low cost, high reliability, simple installation and so on, without prejudice to the original mechanical scales to any
