The production process of water quality analyzers generally includes the following main links:

Design and development

Demand analysis: clarify the user needs and market positioning of water quality analyzers, such as detection parameters, accuracy requirements, scope of application, and operation methods.

Principle research: select appropriate detection principles according to detection parameters, such as electrochemical method, optical method, chromatography, etc., and conduct relevant technical research and experimental verification.

Circuit design: design the hardware circuit of the instrument, including sensor signal acquisition circuit, amplification circuit, filtering circuit, A/D conversion circuit, microprocessor control circuit, display circuit, communication circuit, etc., to ensure that each part of the circuit can work stably and accurately.

Software design: develop instrument control software and data processing software to realize the instrument's automated operation, data acquisition, processing, storage, display and transmission functions, and design a friendly user interface to facilitate user operation and settings.

Structural design: design the shell structure of the instrument, consider the portability, stability, protection, heat dissipation of the instrument, and the rationality of the layout of internal components, and draw three-dimensional models and engineering drawings.

Raw material procurement

Sensor procurement: purchase high-quality sensors according to design requirements to ensure that they have good sensitivity, accuracy and stability.

Purchase of electronic components: Purchase various electronic components, such as chips, resistors, capacitors, inductors, crystal oscillators, etc., and choose suppliers with good reputation and quality assurance.

Purchase of mechanical parts: For the instrument's housing, brackets, buttons, display screens and other mechanical parts, customize or purchase standard parts according to the design drawings.

Purchase of other materials: Some auxiliary materials, such as power cords, data cables, seals, screws, etc., also need to be purchased.

Circuit board manufacturing

Printed circuit board (PCB) production: Convert the designed circuit schematic into a PCB layout, and then make the PCB board through plate making, etching, drilling, electroplating and other processes.

Component welding: Weld the purchased electronic components to the PCB board according to the design requirements. Manual welding or automated surface mount technology (SMT) can be used for welding to ensure reliable welding quality and avoid problems such as cold welding and short circuit.

Circuit board testing: Conduct electrical performance tests on the welded circuit board, including testing the voltage, current, resistance and other parameters of each circuit node, checking whether the circuit is working properly, whether there are faults or defects, and repairing or reworking unqualified circuit boards.

Sensor assembly and calibration

Sensor assembly: Assemble the various components of the sensor to ensure that the structure of the sensor is firm and the internal optical path and circuit connection are correct. For some sensors that need to be encapsulated, they must be sealed to prevent the external environment from affecting the performance of the sensor.

Sensor calibration: Use standard solution or standard gas to calibrate the sensor to establish an accurate relationship between the sensor output signal and the concentration or physical quantity of the measured substance. The calibration process needs to be strictly operated in accordance with the calibration specifications to ensure the accuracy and reliability of the calibration results, and record the calibration data and curves.

Mechanical assembly

Shell assembly: Assemble the purchased mechanical parts to form the shell of the instrument. During the assembly process, pay attention to the installation position and connection method of each component to ensure the sealing and stability of the shell, and pay attention to avoid damage to the internal circuit and sensor during the assembly process.

Internal assembly: Install the circuit board, sensor, display, power supply and other components inside the instrument shell, and wire and connect them according to the design requirements to ensure that the electrical connection and mechanical fixation between the components are firm and reliable.

Machine debugging and testing

Function debugging: Perform functional debugging on the assembled water quality analyzer to check whether the various functions of the instrument are normal, such as power-on self-test, parameter setting, measurement function, data storage, display and transmission functions, etc. By inputting different signals or samples, check whether the instrument's response is correct and whether the various indicators meet the design requirements.

Performance test: Perform a comprehensive performance test on the instrument, including the test of measurement precision, accuracy, repeatability, stability, detection limit, linear range and other indicators. Use standard samples or actual water samples for testing, compare the test results with the technical indicators of the instrument, and evaluate whether the performance of the instrument meets the requirements.

Environmental adaptability test: According to the environmental requirements of the instrument, perform environmental adaptability tests, such as the impact of environmental factors such as temperature, humidity, vibration, and electromagnetic interference on the performance of the instrument. Ensure that the instrument can work stably and accurately under different environmental conditions.

Quality inspection and packaging

Quality inspection: Carry out final inspection of the finished product in accordance with the quality standards, check whether the appearance, assembly quality, functional performance and other aspects of the instrument meet the requirements, affix qualified labels to qualified products, mark and isolate unqualified products, analyze the reasons and rework or scrap them.

Packaging: Packaging of qualified water quality analyzers, generally including inner and outer packaging. The inner packaging usually uses anti-static bags, foam plastics and other materials to protect the instrument to prevent collision and damage during transportation; the outer packaging uses cartons or wooden boxes, and the product model, specifications, quantity, production date, manufacturer and other information are marked on the packaging, and the product manual, warranty card, certificate and other relevant documents are attached.

After-sales service and technical support

Training: Provide users with operation training so that users can correctly use and maintain water quality analyzers, including instrument operation methods, parameter settings, daily maintenance, troubleshooting and other aspects of training.

Repair and maintenance: Establish an after-sales service system, respond to users' repair needs in a timely manner, and provide users with repair services and maintenance suggestions. Regularly visit users to understand the use of the instrument and provide users with technical support and product upgrade services.

Accessories supply: Ensure the timely supply of various accessories and consumables of the instrument to meet the user's replacement needs during use and ensure the normal operation of the instrument.