Remote calibrating device used for water quality on-line detector

Abstract

The invention discloses a remote calibrating device used for a water quality on-line detector, which relates to the technical filed of calibration of a water quality on-line monitor. The remote calibrating device comprises a water standard substance reservoir, a standard solution blending storage apparatus, a logic controller, a humiture sensor, and a video monitoring and data acquisition apparatus; a humiture adjusting program is preset in the logic controller, the humiture is regulated and controlled for on-site environment, multiple valves are controlled by the logic controller, different amounts of matrixes and the standard substances are extracted from the water standard substance reservoir according to the designed program by a metering pump for dilution, and the video monitoring anddata acquisition apparatus can be used for realizing a calibration process of the water quality on-line automatic detector; a whole device realizes the automatic extraction in a calibration process and blending of a standard solution, which saves labor and time, the work efficiency of the water quality on-line automatic detector is greatly increased, the error during the water quality on-line detector calibration process is greatly reduced, and the calibration precision is increased.

Description

technical field [0001] The invention relates to the technical field of calibration of online water quality monitors, in particular to a remote calibration device for online water quality monitors. Background technique [0002] The online automatic water quality monitor is mainly an online monitoring device for monitoring water pollution factors such as ammonia nitrogen, COD, total phosphorus and total nitrogen in water. In recent years, as my country's self-developed water quality online automatic monitor has passed the certification of the State Environmental Protection Administration, so far the water quality online monitor has played an important role in the national wastewater monitoring field. The detection data of the online water quality monitor is an important basis for evaluating the pollution degree of the water body, and the monitoring data can represent the pollution status of the water body to a certain extent. Ammonia nitrogen, COD, total phosphorus and total ...

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Problems solved by technology

[0003] At present, corresponding national metrological verification regulations have been issued for different types of online automatic water quality monitors. Since the automatic online water quality monitor uses the principle of flow injection analysis, the corresponding verification and calibration should be completed in accordance with the corresponding verification regulations and calibration specifications. The work is time-consuming and labor-intensive. According to the current system management method, it is difficult to quickly and automatically complete the verification and calibration of the water quality online automatic monitor in the area.

[0004] When the existing water quality on-line automatic monitor verification device works, firstly, according to the use range of the instrument and equipment, standard solutions of various concentrations are prepared in the laboratory according to the corresponding measurement verification regulations or calibration specification technical requirements, and the verification and calibration work begins. When monitoring the requirements of the surrounding environmental conditions to meet the requirements of the technical standards, and then according to the corresponding technical requirements of the instrument to be tested, several concentrations of standard solutions are put into the calibration sampling place of the instrument in turn. The following problems exist in this scheme: (1 ) Some standard substances used for traceability of water quality online monitors are extremely volatile, such as the ammonia nitrogen standard solution in water used for the verification of ammonia automatic monitors, the temperature and humidity of the environment have a great impact on the standard solution

(2) It takes about one hour for each water sample to be monitored by the online automatic water quality monitor. According to the corresponding technical standards, it takes 8 to 48 hours to complete the verification or calibration of an online automatic water quality monitor, which takes a long time , it is necessary to replace the standard solution with different concentrations in the middle

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