* Part of the workflow description: When the object is placed on the weighing pan, the pressure is applied to the sensor, the sensor is deformed , so that the impedance changes, and the excitation voltage is changed to output a varying analog signal. The signal is amplified by an amplifying circuit and output to an analog to digital converter . The digital signal converted into a convenient processing is output to the CPU arithmetic control. The CPU outputs this result to the display according to keyboard commands and programs. Until this result is shown.
The classification of the second part of the scale: 1. According to the principle: electronic scale mechanical scale electromechanical combined scale 2. According to the function points: counting scale pricing scale weighing scale 3. According to the purpose: industrial scales commercial scales special scales
The third part of the scale: 1. Desktop scale refers to the electronic scale with the full weighing below 30Kg 2. The scale refers to the electronic scale with the full weighing within 30-300Kg 3. The weighbridge refers to the electronic scale with the full weighing more than 300Kg 4 precision balance
The fourth part is classified according to the accuracy: Class I : Special balance precision ≥ 1/10 million Class II : High precision balance 1 / 1 million ≤ precision < 1 / 10 million Class III : Medium precision balance 1 / 1000 ≤ precision < 1/1 million class IV : ordinary scale 1/100 ≤ precision < 1/1000
The fifth part of the terminology: 1. zui large weighing: an electronic scale does not count the tare, can weigh the large load of zui ; 2. zui small weighing: an electronic scale will appear below this value A relative error ; 3. Safe load: 120% normal weighing range ; 4. Rated load: Normal weighing range ; 5. Allowable error: Large deviation of zui allowed by level check ; 6. Sensing: One electronic scale The small scale of zui that can be displayed ; usually expressed by “ d †; 7. Analytical quantity: an electronic scale with counting function, which can distinguish the small scale of Zui ; 8. Resolution: One electronic with counting function Scale, a parameter with internal resolution ; 9. Warm-up time: The time taken by a scale to reach each index ; 10. Accuracy: The ratio of the sensed quantity to the full scale ; 11. The ambient temperature of the electronic scale is: -10 Celsius to 40 degrees Celsius 12. Table scales for scales: 25cm X 30cm 30cm X 40cm 40cm X 50cm 42cm X 52cm 45cm X 60cm
The characteristics of the sixth part of the electronic scale: 1. Realize long-distance operation ; 2. Realize automatic control ; 3. Digital display is intuitive and reduce human error ; 4. High accuracy and strong resolution ; 5. Wide weighing range ; . unique features: tare, pre-tare, zero, accumulation, warning and the like; 7. simple maintenance; 8. small volume; 9. installation, simple correction; 10. special industries, can be accessed by a computer or a printer driver; 11. Intelligent electronic scale, fast response and high efficiency ;
The seventh part of the electronic scale inspection process: 1. First of all the overall inspection: whether there is wear and damage ; 2. Can boot: whether it is displayed from 0 to 9 after the boot, whether the number is blurred, whether it can be zero ; 3. With or without backlight 4. Can use the weight test to test whether it can be weighed ; 5. Whether the charger is in good condition and can be used ; 6. Whether the accessories are complete ;
The eighth part of the sensor type: 1. Resistive type: moderate price, high precision, wide use ; 2. Capacitive type: small size, low precision ; 3. Magnetic floating type: high precision, high cost ; 4. Hydraulic type: now The market has been eliminated ; display types: 1.LCD (liquid crystal display): no plug-in, power saving, with backlight ; 2. LED : no plug-in, power consumption, very bright ; 3. Lamp: plug-in, power consumption , is high; K / B (key) type: 1. membrane keypad: contact type; 2. mechanical key: combining many individual keys; sensor characteristics: 1. rated load; 2. output sensitivity; 3. Nonlinear; 4. hysteresis; 5. repeatability; 6. creep; 7. Effect zero output; 8. rated output temperature effect; 9. the zero input; 10. The input impedance; 11. The output impedance; 12 insulation resistance; 13. Allowable excitation voltage ; (5-18V)
The ninth part of the sensor damage phenomenon: 1. Weighing is not allowed ; 2. The display does not return to zero ; 3. The displayed number jumps to determine the sensor's +E , -E , +S , -S 1. First use the resistance file There are 6 groups of resistance values ​​between the 4 lines and the two. For example, 400-450 ohms is +E and -E; if it is 350 ohms, it is +S and -S; for 290 ohms, it is R bridge arm ; 2. at +E and -E is connected with +_5V Voltage, the sensor correctly applies a pressure, such as the output +_S increases, the red test pen is +S , and vice versa -S;
The tenth part of the high-precision counting scale features: 1. Kg / Ib unit conversion function ; 2. Zero point display range, adjustment function (GLH series does not ) 3. Sampling speed adjustment function ; 4. There are 10 sets of single-weight memory function ; Weight, quantity and accumulation function can be performed at the same time (GLH only has accumulated in quantity ) 6. Weight and quantity upper limit warning function can be set ; 7. Automatic zero tracking and temperature linear correction ; 8. Deduction and pre-deduction function ; 9. Standby Function ; 10. There are zero display range and zero tracking range ; 11. There is battery voltage regulation limit function.
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