The water vapor transmission rate meter (WVTR meter) needs to follow specific steps and operating specifications to ensure the accuracy and reliability of the test results. The following is a detailed method of use:
Steps
1. Preparation
Calibrate the instrument: Calibrate the instrument using standard samples according to the manufacturer's instructions to ensure the accuracy of the measurement.
Prepare the sample: Cut the sample to meet the test requirements of the instrument. Generally, the sample should be kept flat and without wrinkles or damage.
Environmental preparation: Make sure that the temperature and humidity of the test environment meet the working conditions of the instrument and avoid external interference.
2. Instrument settings
Install the sample: Place the prepared sample in the test chamber and ensure that the sample fits tightly to prevent air leakage. Use the fixture or fixture equipped with the instrument to fix the sample.
Set the test parameters: Set the test parameters of the instrument according to the test requirements, such as temperature, humidity, test time, etc. For specific parameter settings, please refer to the instrument's operating manual.
3. Start the test
Start the instrument: Turn on the instrument and start the test program. The instrument will automatically control the test environment and record the water vapor transmission rate of the sample during the test.
Monitor the test progress: During the test, monitor the instrument's operating status and data collection in real time. If there is any abnormality, handle it in time.
4. Data recording and analysis
Data reading: After the test, read and record the test data. Most instruments will automatically generate a test report showing the value of water vapor transmission rate.
Data analysis: According to the test data, analyze the water vapor transmission performance of the sample. Compare the data of different samples to evaluate their performance differences.
5. Cleaning and maintenance
Clean the instrument: After the test, turn off the instrument and clean it. Especially the test cavity and sensor area to ensure that there is no residue.
Regular maintenance: According to the manufacturer's recommendations, regularly maintain and calibrate the instrument to ensure its long-term stable operation.
Precautions
1. Sample handling: The sample should be protected from contamination and damage and kept in its original state.
2. Environmental control: The temperature and humidity of the test environment should be kept stable to prevent external factors from interfering with the test results.
3. Operation specifications: Strictly follow the instrument operation manual to avoid test errors caused by improper operation.
4. Safety protection: During use, pay attention to the electrical safety of the instrument and the protection of the operator to avoid accidental injuries.
Common problems and solutions
Test results fluctuate greatly: Check whether the sample is firmly installed, whether the test environment is stable, and whether the instrument needs calibration.
The instrument cannot start: Check the power connection to ensure that the instrument is powered on normally. If it still cannot start, contact the manufacturer for technical support.
Data recording error: Check whether the data reading device and sensor are working properly, and restart the instrument or retest if necessary.
Using a water vapor transmission rate meter to test electronic product packaging materials can effectively evaluate the moisture resistance of the material and ensure the safety and stability of electronic products during storage and transportation.
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