Hot sale precision 0.5 3-P 3-W LED multi-function low voltage switch gear use digital...

Hot sale precision 0.5 3-P 3-W LED multi-function low voltage switch gear use digital panel meter with RS485

*Power: AC/DC 85~265V ＜5VA. multifunction power meter with RS485

*Frequency: 45~65Hz

*3-phase 3-wire,3-phase 4-wire. CE approved panel mount programmable switchboard LCD digital power meter

*Input measurement rated value: AC100V/400V Current: AC5A/1A

*Measure: 3-phase power network U,I,P,Q,S,PF and other parameters.

*Active and reactive energy measure. low voltage switchgear use digital panel meter with RS485

*With RS-485 communication interface, MODBUS-RTU protocol.

*With 2 way power pulse output.

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Additional functions: three phase digital ammeter digital input output

*Discrete input: 4-way discrete input, dry contact mode;

*Discrete output: 4-way discrete output, optocoupler relay;

*Analog output: 4-way analog output, 4~20mA/0~20mA. LED three phase digital voltmeter ammeter combination

Instrument industry development trend analysis

At present, the domestic market satisfaction rate of middle and high-grade scientific testing instruments is 30%, and that of middle and low-end scientific instruments is 65%.Production process measurement and control instruments and system products in large engineering projects in the variety meet the rate of 50%, small and medium-sized engineering up to 70%.Imported products are often the major and key equipment needed for scientific research and production, with large technical content and high added value.

1. Digitalization and intellectualization

Due to the progress of microelectronic technology, instrumentation products are further integrated with microprocessors and PC technology, and the digitization and intellectualization of instrumentation have been continuously improved.Taking the "DSPS" concept proposed by Texas instruments as an example, DSP chip as the core, together with advanced mixed signal circuit, ASIC circuit, components and development tools to provide solutions for the whole application system.

Instruments used in a large number of very large scale integration (VLSI) of new devices, surface mount technology (SMT), multilayer circuit board printing, wafer scale integration (WSI) and multichip module (MCM), and other new technology, CAD, CAM, CAPP and computer aided means such as CAT, make the multimedia technology, human-computer interaction, new technology such as fuzzy control, artificial neural network has been widely used in modern instruments.

2. Networking

At present, the development of field bus and intelligent instrument in the world shows the coexistence of many kinds of buses and instruments.HART, FF, Profibus, Lonworks, WorldFIP, CAN and other buses have been extended from one field to other fields.

Many kinds of intelligent instruments have been put on the market one after another.The integrated test system is also moving to the network. The instruments are connected by GPIB bus and VXI bus.

3. Miniaturization

We have learned that MEMS is one of the key development fields in developed countries in the late 1980s and is regarded as a widely used new technology in the 21st century.The sensor and signal processing technology, which is listed as one of the 22 major technologies in the United States that have a significant impact on national security and prosperity, mainly relies on the miniaturization technology.

MEMS technology applied to micro instrumentation is known as the chip instrumentation, MEMS products include automotive accelerometers, pressure, chemical, flow transmitter, micro spectrometer and other products, widely used in environmental science, aerospace, biological medicine, automotive industry, military, industrial control and other fields.