The inspection methods for glass instrument light industrial products usually include appearance inspection, capacity inspection, tightness inspection, performance requirements inspection, and other aspects. The following is a detailed explanation of these inspection methods:

1. Appearance inspection
Inspection items:
Whether there are problems such as damage, scratches, wear, stains, etc. on the surface of the instrument affects the use effect.
Whether the scale lines of the instrument are clear and complete, and whether the width meets the requirements.
Whether the instrument has accurate markings, such as usage marks, A-level marks, etc.
Inspection method:
Use the visual method to carefully observe the instrument.
Use tools such as magnifying glasses or microscopes to magnify and inspect the scale lines and marks of the instrument.
2. Capacity inspection
Inspection purpose: Verify whether the capacity of the glass instrument is accurate.
Inspection method:
For glass instruments with accurate capacity such as volumetric flasks and pipettes, the measurement method can be used for capacity inspection.
Inject a certain amount of pure water into the instrument, then weigh its mass, and calculate the actual capacity of the instrument based on the density and temperature of the water.
Compare the calculated actual capacity with the nominal capacity of the instrument to determine whether it meets the standard.
3. Fit inspection
Inspection purpose: to verify whether the fit of glass instruments with sealed structures (such as burettes, stoppered measuring instruments, etc.) is good.
Inspection method:
For burettes, water can be filled to the highest mark, the piston can be closed, and the permeation volume within a certain period of time can be observed to see whether it exceeds the allowable value.
For stoppered measuring instruments, water can be filled to the highest mark, the stopper can be tightly closed, and then it can be turned upside down a certain number of times, and kept upside down for a certain period of time to see if there is water seepage.
4. Performance requirements inspection
Inspection content:
Whether the heat resistance, corrosion resistance, pressure resistance, and other properties of the instrument meet the requirements.
Whether the operating temperature range of the instrument meets the material properties to prevent glass breakage due to thermal expansion and contraction.
Inspection method:
According to the specific performance and use of the instrument, use the corresponding test methods and equipment to perform a performance inspection.
For example, for glass instruments that need to withstand a certain pressure, pressure testing equipment can be used for pressure testing.
5. Other inspection methods
Comparison method: Compare the instrument to be inspected with the inspected instrument to perform the comparative calculation of the error.
Repeated measurement method: Use the same instrument or the same model of the instrument to measure the same value multiple times and calculate the error.
Standard material method: Use standard materials for calibration, such as using standard weights to calibrate the balance.
VI. Precautions
When testing glass instruments, ensure that the temperature, humidity, and other conditions of the test environment meet the standard requirements.
The test equipment and tools used should be calibrated and verified to ensure their accuracy and reliability.
During the test process, the test methods and steps should be strictly followed to avoid errors caused by improper operation.
After the test, the test report and records should be filled in in time, and the test results should be sorted and archived.
In summary, the testing methods of glass instrument light industrial products involve multiple aspects and multiple technical means. Through strict testing, it can be ensured that the quality and performance of glass instruments meet the standard requirements, providing reliable guarantees for scientific research and production.