Weighing instrument refers to an electronic weighing instrument that displays the mass and weighing state of the object. It is composed of error amplifier, reversible motor, balance bridge, excitation power supply, dial and pointer, etc. It adopts measuring amplifier structure to accept and amplify the signal of weighing sensor. Magnification is usually hundreds of times. The filter unit filters out electrical noise from outside the machine and generated by the amplifier itself. A/D conversion unit converts analog to digital, and the transposition number is usually more than 14 bits of binary number. The data processing unit is composed of microprocessor as the core and peripheral support chip, which completes a series of operations such as data acquisition, operation and storage under the control of program, and the processing results are sent to the corresponding interface.
020-34563445Weighing instrument is the instrument that displays the mass and weighing status of the weighed object in the electronic weighing equipment, which is composed of error amplifier, reversible motor, balanced bridge, excitation power supply, dial and pointer, etc. It works according to the principle of auto-balanced electronic potential difference meter. Measuring amplifier structure is adopted to accept and amplify the signal. Amplification is generally hundreds of times. Filtering unit to filter out from the machine outside the mix and the amplifier itself generated by the electrical noise. A/D conversion unit to convert analog into digital quantities, the number of bits usually take the binary number of 14 or more. Data processing unit is a microprocessor as the core, the use of peripheral support chip composition, under the control of the program to complete the collection of data, arithmetic, storage and a series of operations, the results sent to the appropriate interface. The display unit displays the weighing value and weighing status in the form of numbers or words, charts, etc., and can contact with external equipment through the interface.
Basic function
3-channel optically isolated switch input, 3-channel switch (built-in 3-channel relay) output control.
High-precision A/D conversion, readability up to 1/30,000
5-point non-linearity correction
No need to re-calibrate the meter, just input the parameters of the original meter to use
Integration of addition/subtraction scales/sorting scales/upper and lower limit alarms/peak hold etc.
Parameters such as quantitative value, lead time, upper and lower limits, node delay, etc. can be set freely according to the application.
Addition/subtraction scale mode can choose 1-2 kinds of dosage, sorting scale mode can choose external control/self-test/free upper and lower limit modes.
Technical Parameters
Accuracy level: 3 levels, n=3000
AD conversion mode: Σ-△ conversion mode
AD conversion code: 24bit
Conversion speed: 80 times / sec
Input signal range: -19mV～+19mV
Input sensitivity: ≥1uV/e
Non-linearity: ≤0.01%F.S
Full scale temperature coefficient: ≤8PPM/°C
Sensor bridge power supply: DC: 5V; 350mA
Number of sensor connections: 1~8
