Portable transmitter calibrator

Abstract

The invention discloses a portable transmitter calibrator, comprising a voltage stabilizing transformer, an alternating-current constant voltage and constant current module, a program controlled resistor module, a DSP (Digital Signal Processor) controller and a human-computer interface, wherein the alternating-current constant voltage and constant current module comprises a rectifying circuit, an inverter, a filter and a sampling adjustment circuit; the inverter comprises an intelligent power module and a photoelectric isolating drive circuit; the voltage stabilizing transformer is connected with a transmitter to be calibrated; the output end of the sampling adjustment circuit is connected with the DSP controller; the program controlled resistor module is separately connected with the DSP controller and the transmitter to be calibrated; and the human-computer interface is connected with the DSP controller. The portable transmitter calibrator can realize convenient calibration for multiple transmitters, has the characteristics of multiple functions, small size, light mass, portability and the like, and can significantly improve the convenience of transmitter calibration and save money.

Description

technical field [0001] The invention relates to a portable transmitter calibrator. Background technique [0002] In order to enable the transmitter calibrator to meet the functional requirements of the transmitter calibration to the greatest extent, first of all, it is necessary to analyze the functional requirements of the transmitter calibrator system. The functional requirements analysis of the transmitter calibrator system is based on the daily transmitter calibration, through the statistics and classification of the objects, contents, forms, etc. of the transmitter calibrator, and finally determine the transmitter calibration The functions that the instrument needs to complete, so as to determine the various equipment that the transmitter calibrator needs to be equipped with. Current transmitters, voltage transmitters and temperature transmitters are important equipment for electrical measurement, relay protection, automatic control and scheduling in power systems. Th...

AI Technical Summary

Problems solved by technology

The portable calibrators that have been used at present generally have the disadvantages of simple structure, single function, and being easily affected by various error factors, so it is difficult to guarantee the calibration accuracy; while the computer-based virtual instrument calibration scheme is powerful, but the cost High, and currently cannot meet the requirements for precision measurement of various power transmitters

[0013] At present, the portable calibrator that has been used generally has the disadvantages of simple structure, single function, and easy to be affected by various error factors, so it is difficult to guarantee the calibration accuracy; and the computer-based virtual instrument calibration scheme, although powerful, but The cost is high, and at present, it cannot meet the requirements of precision measurement for various power transmitters

Due to the use of multiple instruments for calibration, the accuracy and reliability of the calibration work are affected, especially the calibration at the work site is inconvenient.

Images