Appearance Inspection
- Check if the instrument casing is damaged, deformed, scratched, or corroded.
- Ensure the display is clear, free from damage, stains, or abnormal display issues.
- Verify if buttons, knobs, and other operational components are flexible without sticking or loosening.
Specification and Model Verification
- Confirm that the instrument’s model and specifications match the purchase contract or order.
- Check the technical parameters of the instrument, such as measurement range, accuracy level, working voltage, etc., to ensure they meet the requirements.
Completeness of Accessories
- Ensure that the accompanying documents such as manuals, certificates, and warranty cards are complete.
- Verify that the necessary accessories, like sensors, connecting cables, and mounting brackets, are all intact.
Functionality Test
- Power on the instrument and check if it starts up normally, with all indicator lights functioning properly.
- Perform basic operations, such as measurement, settings, data storage, and retrieval, to verify the functionality.
- For instruments with communication functions, test if they communicate smoothly with the host computer or other devices.
Accuracy Calibration
- Use a standard source or instrument to calibrate the accuracy of the instrument and compare the measurement results to ensure they are within the allowable error range.
- For instruments requiring regular calibration, check the calibration labels and intervals.
Stability Test
- Allow the instrument to operate continuously in a working state for a period and observe whether the measured values remain stable, without significant drift or fluctuation.
Packaging and Protection
- Check if the packaging is sturdy enough to protect the instrument from damage during transport.
- For instruments with special protection requirements, such as waterproof, dustproof, or shockproof, verify that the protective measures are adequate.
Labeling and Nameplate
- Ensure the labels on the instrument are clear and accurate, including product name, model, manufacturer, production date, etc.
- Verify that the information on the nameplate matches the actual conditions.
Acceptance Records
- Record the results of each inspection during the acceptance process in detail, including any issues discovered and their resolution.
- Acceptance personnel should sign the acceptance report and archive it for future reference.
In summary, instrument acceptance requires careful and comprehensive checks to ensure that the quality and performance of the instrument meet the requirements, thus ensuring its accuracy and reliability in actual application.
Instrument Acceptance Process Specifications
I. Preparation for Acceptance
- Form an acceptance team, including purchasing personnel, technical staff, and quality management personnel.
- Collect relevant materials such as the purchase contract, technical specifications, and operation manuals.
- Prepare the tools and equipment needed for acceptance, such as standard sources and testing instruments.
II. Appearance Inspection
- Check if the packaging is intact, with no damage or moisture.
- After unpacking, check whether the instrument’s appearance is clean and free from scratches, deformation, rust, or other defects.
- Ensure the display, buttons, interfaces, and other components are undamaged and operate smoothly.
III. Technical Parameter Verification
- Based on the purchase contract and technical specifications, verify the instrument’s model, specifications, measurement range, accuracy level, working voltage, and working temperature to ensure they meet the requirements.
- Confirm that the nameplate labeling is clear, accurate, and consistent with the contract and technical documentation.
IV. Functionality Test
- Power on the instrument and check if the self-test at startup is normal and if the display is clear and complete.
- Follow the operation manual to test all functions of the instrument, such as measurement, alarms, data storage, transmission, and calibration, ensuring they work correctly.
- For instruments with communication functions, test the stability of the connection to the host computer or other devices and the accuracy of data transmission.
V. Accuracy Calibration
- Use a standard source or a calibrated high-precision instrument to verify the measurement accuracy of the instrument.
- Select multiple measurement points within the instrument’s range for comparison and calculate whether the error is within the allowable range.
- For instruments that do not meet accuracy requirements, adjustments or repairs should be made, followed by recalibration.
VI. Stability Test
- Run the instrument continuously under normal working conditions for a period (typically 4-8 hours) to observe whether the measurement values are stable, with no drift or fluctuation.
- Record the measurement data during the operation and analyze its stability.
VII. Acceptance Conclusion
- The acceptance team should conduct a comprehensive evaluation of the instrument based on the results of the inspections and tests.
- If the instrument fully meets the acceptance requirements, issue a passing report and proceed with the warehousing process.
- If there are minor issues that do not affect use, negotiate a resolution with the supplier and note the handling in the acceptance report.
- If the instrument has serious quality problems or does not meet contractual requirements, reject the acceptance and promptly communicate with the supplier for a return or replacement.
VIII. Archiving of Documents
- Organize and archive all relevant materials from the acceptance process, such as the acceptance report, test data, and quality certification documents.
- Establish an acceptance archive for the instrument for future reference and traceability.
Key Points in Instrument Acceptance:
- Clear Acceptance Standards: Ensure clear acceptance standards, including technical specifications, performance requirements, and functional characteristics before starting the acceptance process.
- Environmental Condition Simulation: Simulate the actual working environment of the instrument as much as possible to verify its stability and reliability in specific conditions.
- Personnel Qualification: Acceptance personnel should possess the necessary professional knowledge and skills, being familiar with the working principles and operational methods of the instrument.
- Acceptance Time Allocation: Allocate sufficient time for comprehensive acceptance to avoid overlooking important issues due to a rushed process.
- Safety Precautions: Ensure safety measures are in place during the acceptance process for instruments with potential risks, such as high voltage or high temperature.
Common Issues:
- Accuracy Deviation: The actual measurement accuracy does not match the nominal accuracy, possibly leading to inaccurate data.
- Missing or Abnormal Functions: Some functions may not work properly, or faults may occur during operation.
- Poor Stability: The measurement values fluctuate or drift significantly over time, affecting data reliability.
- Communication Failures: Difficulty in communicating with other devices, leading to data transmission errors or interruptions.
- Software Compatibility Issues: The instrument’s software may be incompatible with the operating system or other applications.
- Incomplete Accessories: Missing essential accessories like sensors, data cables, or installation tools.
- Unclear Labeling: Fuzzy or incorrect information on the instrument’s labels or nameplate, hindering proper use and maintenance.
- Damaged Packaging: Packaging damage during transport may result in the instrument being hit or squeezed.