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Training Case of GNST-900S Laboratory at Hunan Nonferrous Metals School

Date: 2025-12-24Read: 1

Training Case of GNST-900S Multi parameter Water Quality Detector in Hunan Nonferrous Metals School Laboratory

1、 Training background and objectives

（1） Background Overview

As a professional institution dedicated to talent cultivation and scientific research innovation in the non-ferrous metal industry, Hunan Nonferrous Metals School needs to carry out a large number of water quality testing experimental teaching and research projects related to non-ferrous metal smelting and processing in its core majors such as environmental engineering and metallurgical technology. The wastewater generated during the smelting and processing of non-ferrous metals contains heavy metal ions such as copper, lead, cadmium, chromium, nickel, as well as characteristic pollutants such as COD and ammonia nitrogen. It is a key research object for teaching and scientific research. In order to comply with national standards such as "Determination of Heavy Metals in Water Quality by Atomic Absorption Spectroscopy" and improve the quality of experimental teaching and the accuracy of scientific research and detection, the school has upgraded its environmental monitoring laboratory and introduced the GNST-900S multi parameter water quality analyzer. This instrument is designed based on IoT intelligence and is equipped with Genesite intelligent detection system and ST32 ARM processor. It can accurately detect more than 40 water quality indicators, especially suitable for detecting heavy metals, COD, ammonia nitrogen and other indicators in non-ferrous metal wastewater. It has the advantages of easy operation, stable data, and fast detection speed, and can meet the dual needs of experimental teaching and scientific research monitoring. To ensure that laboratory teachers, researchers, and senior students fully master the correct operation, precise calibration, data interpretation, and daily maintenance skills of instruments, and fully leverage the core supporting role of equipment in teaching and research, the school has partnered with instrument supplier Henan Suijing Environmental Protection Technology Co., Ltd. to conduct targeted special training.

（2） Core objective

Theoretical level: Enable trainees to understand the detection principle, core technical indicators, and national standard basis of GNST-900S instrument, and clarify the applicable scenarios for different water quality indicators testing.
Practical level: Ensure that trainees are proficient in the entire process of instrument startup self check, parameter calibration, sample preparation and testing, data storage and export, and can independently complete the testing of typical water quality indicators.
Guarantee level: Master the common troubleshooting methods and daily maintenance points of instruments, extend the service life of instruments, and ensure the long-term stability and reliability of detection data.
Application level: To achieve deep integration of theory and scientific research practice, enhance the ability of trainees to use instruments to solve practical scientific research problems, and lay the foundation for the smooth progress of related environmental monitoring scientific research projects.
Theoretical level: Enable trainees to understand the detection principle, core technical indicators, and national standard basis of GNST-900S instrument, clarify the applicable scenarios and teaching and research adaptability of non-ferrous metal wastewater related indicator detection.
Practical level: Ensure that trainees are proficient in the entire process of instrument startup self check, parameter calibration, sample preparation and testing, data storage and export, and can independently complete the detection of typical indicators of non-ferrous metal wastewater.
Guarantee level: Master the common troubleshooting methods and daily maintenance points of instruments, extend the service life of instruments, and ensure the long-term stability and reliability of teaching, scientific research, and testing data.
Application level: To achieve a deep integration of theory and teaching research practice, enhance the ability of trainees to use instruments to conduct experimental teaching and solve research problems in non-ferrous metal wastewater detection, and lay the foundation for high-quality teaching and research projects.

2、 Training preparation

（1） Organizational Structure

1. Host: Environmental Science Research Center, Yangtze River Delta Research Institute, University of Electronic Science and Technology of China (Huzhou)

2. Supporting unit: Henan Suijing Environmental Protection Technology Co., Ltd

3. Training instructor: Senior technical engineer from the supplier (with rich experience in GNST-900S instrument debugging and training)

4. Trainees: 22 members of the research team related to environmental monitoring and experimental technicians from the research institute

（2） Preliminary preparation

Site and equipment preparation: The standardization laboratory of the research institute is selected as the training site, and the operation table is organized in advance to ensure good ventilation and that the temperature and humidity meet the requirements for instrument operation (temperature 5-40 ℃, relative humidity ≤ 85% RH). Place the GNST-900S host, multifunctional intelligent digestion instrument, supporting testing tubes, prefabricated reagents and other equipment and materials in place according to the operating line, complete the power connection and power on self-test, and ensure that all equipment is in normal working condition; Prepare calibration solution, simulated water sample, deionized water, lens cleaning paper and other practical consumables at the same time.
Site and equipment preparation: Select the upgraded standardized environmental monitoring laboratory of the school as the training site, organize the operation desk in advance, divide the teaching demonstration area and the group practical operation area, ensure good ventilation and temperature and humidity meet the requirements of instrument operation (temperature 5-40 ℃, relative humidity ≤ 85% RH). Place the GNST-900S host, multifunctional intelligent digestion instrument, supporting testing tubes, prefabricated reagents and other equipment and materials in place according to the operating line, complete the power connection and power on self-test, and ensure that all equipment is in normal working condition; At the same time, prepare calibration solution, simulated non-ferrous metal wastewater samples (including copper, lead, COD and other indicators), standard samples, deionized water, experimental protective equipment and other practical consumables.
Preparation of materials and tools: Each participant shall be equipped with one set of "GNST-900S Multi parameter Water Quality Tester Manual", training materials (including theoretical knowledge points, operation process diagrams, and common problem manuals), and electrical insulation tools, equipment debugging tools, and materials such as "Training Sign in Form" and "Practical Assessment Scoring Form".

Customized plan: The lecturer communicates with the school laboratory director and professional leaders in advance, and adjusts the training content according to the characteristics of wastewater pollution in the non-ferrous metal industry (including multiple heavy metal ions and complex components), as well as the school's experimental teaching outline and research project needs, with a focus on strengthening copper, lead, cadmium COD、 Training on the operation of core indicators such as ammonia nitrogen in non-ferrous metal wastewater, including instrument practical demonstration skills and student experimental guidance points in teaching scenarios, to ensure that the training content is in line with the actual teaching and research.

3、 Training Implementation Process

This training adopts a diversified mode of "theoretical explanation+practical demonstration+group practice+assessment summary", lasting for 1 day. The specific process is as follows:

（1） Theoretical explanation session (9:00-10:30)

The lecturer conducts systematic theoretical lectures through PPT combined with physical presentations

Core principle of the instrument: Detailed explanation of the LED cold light source optical structure, data homogenization calculation algorithm, and other core technologies of the GNST-900S instrument. Explain the principles of different detection projects, such as the potassium dichromate method for COD and the spectrophotometric method for copper/lead. Compare the technical requirements for the detection of various characteristic indicators with national standards such as "Atomic Absorption Spectroscopy for the Determination of Heavy Metals in Water Quality" and "Dichromate Method for the Determination of Chemical Oxygen Demand in Water Quality". Clarify the application value of indicator detection in the non-ferrous metal industry and its adaptation scenarios in teaching and research.

Technical specifications and functions: Introduce key technical parameters such as the detection range, detection limit, relative error, and repeatability of the instrument, demonstrate the operation logic of the 8-inch IPS high-definition color touch screen, and explain the application scenarios of core functions such as data storage (supporting 100000 data storage), automatic printing, and batch testing.

Safety and Standards: Emphasize special safety precautions for the detection of non-ferrous metal wastewater, including protective treatment of heavy metal containing samples, standardized use of chemical reagents (such as color reagents and oxidants), key protection points for high-temperature digestion, and compliance requirements for the disposal of experimental waste; Clarify the collection, storage, and pretreatment process of teaching and research samples (such as heavy metal sample digestion, removal of interfering substances, etc.), and explain the differences in sample management requirements between teaching experiments and scientific research testing.

Maintenance and troubleshooting basics: Briefly explain the core points of daily instrument maintenance, such as probe cleaning, reagent storage, battery maintenance, etc; Briefly introduce the preliminary judgment methods for common faults such as unresponsive startup and data drift.

（2） Practical demonstration session (10:40-11:40)

The lecturer will conduct a full process practical demonstration based on the core detection indicators of non-ferrous metal wastewater and the needs of teaching and scientific research. The focus will be on explaining the key operating steps and precautions for teaching adaptability

Instrument initialization: Demonstrate the power on self-test process and explain how to determine the operating status of the instrument hardware (display screen, buttons, light source) and software system; Introduce the parameter adjustment methods for the system settings interface, such as date and time settings, measurement unit switching, etc.

Calibration operation: Taking copper (a characteristic heavy metal of non-ferrous metals) and COD detection as examples, demonstrate the two-point calibration process - after cleaning the detection channel with deionized water, add blank solution and standard calibration solution in sequence, wait for the reading to stabilize, complete the calibration and save the parameters, emphasizing the accuracy of the calibration solution preparation, the key points of the calibration steps in the teaching demonstration, and the operating norms to avoid heavy metal pollution of the detection channel.

Sample testing: demonstrate the exclusive pretreatment process for non-ferrous metal wastewater samples, such as digestion of heavy metal samples, filtration of impurities, etc; Explain the specifications for adding pre made reagents, the precise extraction and digestion steps for water samples of different concentrations, and explain the key parameter settings for the multifunctional intelligent digestion instrument for different indicators such as heavy metals and COD; Put the processed samples into the instrument for testing, demonstrate the methods of data stability judgment and abnormal data review, and focus on explaining the reasons for data deviation analysis and explanation skills in teaching experiments.

Data export: Demonstrate the operation steps of exporting detection data to a computer through a USB interface, and explain the interpretation method and archiving requirements of data files.
Closing operation: Explain the cleaning process of the instrument after the detection is completed (rinse the probe and detection channel with deionized water), the correct storage method of the probe, and the key points of equipment organization.

（3） Group practice session (13:30-16:00)

The trainees are divided into three groups, each equipped with one set of GNST-900S instrument and complete consumables. Under the one-on-one guidance of the instructor and teaching assistant, practical exercises are carried out:

Basic operation exercise: Each group completes the instrument power on self-test, system parameter setting, and calibration of core indicators (copper, COD) in sequence. The instructor provides tour guidance to correct any non-standard operations, such as heavy metal contamination in the detection channel, errors in calibration solution preparation, and sample digestion. At the same time, the laboratory teacher explains the key and difficult points in the teaching demonstration and common error correction methods for students.

Sample testing exercise: Using simulated non-ferrous metal wastewater samples and standard samples, complete the entire process from sample specific pretreatment, reagent addition, digestion to detection, record test data, compare test results between different groups, and analyze the reasons for differences; Experimental teachers simultaneously practice practical demonstrations and instructional language in teaching scenarios, while student representatives focus on practicing basic operational norms.

Fault simulation and troubleshooting: The instructor sets common fault scenarios, such as "instrument unresponsive", "large data fluctuations", "data export failure", etc., and divides the trainees into groups to troubleshoot and solve them, strengthening their grasp of fault handling methods.

Q&A: Participants will ask the instructor questions based on actual teaching and research needs, such as "How to simplify the practical steps of heavy metal detection while ensuring accuracy in teaching", "Interference removal methods for complex non-ferrous metal wastewater samples", "Key points for quality control of scientific research detection data", etc. The instructor will answer them one by one and provide extended explanations based on teaching and research cases.

（4） Assessment and Summary Session (16:10-17:00)

Practical assessment: Two types of assessment objects will be conducted. Experimental teachers and researchers need to complete the full process detection and teaching demonstration of multiple indicators (copper/lead/COD) in non-ferrous metal wastewater, and student representatives need to complete the basic operations of specified indicators; The instructor scores based on dimensions such as operational standardization, data accuracy, and teaching adaptability (for teachers), with a 100% pass rate in the assessment.

Training Summary: The instructor reviewed the core knowledge points and operational essentials of this training, sorted out the common problems that the trainees encountered in practical operation, and provided improvement suggestions; The laboratory director summarized the training results, emphasized the importance of standardized use of instruments for teaching and research quality, clarified the management requirements for instrument use in teaching experiments and scientific research testing, and established a dual mechanism for internal communication and supplier technical support on instrument use issues.

Feedback collection: Distribute training feedback questionnaires to collect opinions and suggestions from trainees on training content, lecturer level, practical arrangements, and other aspects, providing reference for optimizing training work in the future.

4、 Training effectiveness

Skill Enhancement: All trainees are proficient in the theoretical knowledge of GNST-900S instrument and practical skills of non-ferrous metal wastewater detection. The experimental teachers have the ability to independently carry out relevant experimental teaching and guide students. The researchers and students can accurately complete scientific research related detection operations, and the operational standardization and data accuracy meet the expected requirements, solving the problems of "insufficient teaching demonstration pertinence" and "large deviation of scientific research detection data" previously.

Teaching and research support: After training, the instruments were quickly put into experimental teaching and related research projects in environmental engineering and metallurgical technology majors, supporting experimental teaching tasks for four courses including "Environmental Monitoring" and "Metallurgical Pollution Control" annually, covering more than 300 students; Providing precise detection data for scientific research projects such as "Advanced Treatment of Nonferrous Metal Smelting Wastewater", the detection efficiency has increased by more than 50% compared to before, effectively improving teaching quality and research progress.

Management standards: Established a registration system for instrument use, regular calibration and maintenance system, and clarified equipment management responsibilities for trainees, effectively reducing instrument failure rates and extending equipment service life.

Mechanism establishment: Through this training, the technical cooperation between the school and instrument suppliers has been deepened, and a long-term technical exchange channel has been established; At the same time, a communication platform for the use of campus instruments was established to promote skill sharing among laboratory teachers, researchers, and students, laying a solid foundation for the collaborative promotion of subsequent teaching and research work.

5、 Experience Summary and Prospect

（1） Experience summary

Precise customization is key: This training closely combines the dual needs of teaching and research in non-ferrous metal schools, focusing on the detection of characteristic indicators of non-ferrous metal wastewater, adding exclusive content such as teaching demonstration skills and student guidance points, avoiding the "general but not precise" nature of generic training, and improving the effectiveness and adaptability of training.

Practical orientation is the core: adopting a practical teaching mode of "demonstration+practice+fault simulation", participants can master skills in practice, and correct erroneous operations in a timely manner through one-on-one guidance, effectively improving learning efficiency.

Multi party collaboration is a guarantee: efficient collaboration between schools and suppliers ensures sufficient preparation of training venues, equipment, consumables, and other resources; Layered teaching and guidance tailored to the different needs of teachers and students, balancing the dual goals of teaching and research, provide strong guarantees for the consolidation of training effectiveness.

（2） Future prospects

Based on the results of this training, the school will further carry out specialized skills improvement activities. Firstly, advanced specialized training will be conducted to address difficult issues such as complex non-ferrous metal wastewater detection and in-depth analysis of scientific research data; Secondly, relying on the internal communication platform, we will hold experience sharing sessions on instrument usage teaching and develop practical operation manuals for instruments that are suitable for teaching; The third is to continuously deepen cooperation with suppliers, timely follow up on the upgrading of instrument technology, optimize testing plans based on professional construction and scientific research development needs, and provide stronger support for cultivating high-quality technical and skilled talents in the non-ferrous metal industry and promoting environmental research and innovation in the industry.