Smart meter features

The continuous development of the current microelectronics industry, with single-chip as the main body, can combine the computer and measurement and control technologies to form a "smart measurement and control system", that is, intelligent instruments, and traditional instrumentation. In comparison, smart devices have the following features.

1 Operational automation. The entire measurement process of the instrument, such as keyboard scanning, range selection, switch start closure, data acquisition, transmission and processing, and display printing, is controlled by a single-chip microcomputer or a microcontroller to achieve full automation of the measurement process.

2 with self-test function. Including automatic zero adjustment, automatic fault and status inspection, automatic calibration, self-diagnosis and automatic range conversion. Smart meters can automatically detect the location of the fault or even the cause of the fault. This self-test can be run when the instrument is started, and it can also be run during instrument operation, which greatly facilitates instrument maintenance.

3 has data processing capabilities. This is one of the major advantages of smart devices. The use of a microcontroller or microcontroller in smart instruments has made many problems that were previously difficult or impossible to solve with hardware logic, and can now be solved with great flexibility using software. For example, a conventional digital multimeter can only measure resistance, AC/DC voltage, and current, while an intelligent digital multimeter can not only perform the above measurements, but also perform measurements such as zero shift, averaging, extreme value, and statistics. Analysis and other complex data processing functions not only free the user from heavy data processing, but also effectively improve the measurement accuracy of the instrument.

4 has a friendly human-machine dialogue ability. The intelligent instrument uses the keyboard instead of the switch in the conventional instrument, and the operator can realize some measurement function simply by inputting a command through the keyboard. At the same time, the intelligent instrument also informs the operator through the display screen of the instrument's operating conditions, working conditions, and the results of measurement data processing, making the operation of the instrument more convenient and intuitive.

5 has programmable control capabilities. General smart instruments are equipped with standard communication interfaces such as gpib, rs232c, rs485, etc. It is very convenient to form an automatic measurement system with various functions required by the user together with the pc and other instruments to complete more complicated test tasks.