The automatic trace residual carbon analyzer is a device used to determine the residual carbon content in petroleum products, lubricants, and other chemical products. The determination of residual carbon can reflect the thermal stability and combustion performance of oil products. The following are the basic methods and steps for using an automatic trace residual carbon analyzer for measurement:
1. Preparation work
a. Check the instrument
Ensure that the instrument is in good condition and check the connection of power, gas, and other accessories.
Check if the sample cup and heating component are clean to ensure there are no residues.
b. Sample preparation
Prepare the test sample according to the measurement requirements, ensuring that the sample is uniform and free of impurities.
For liquid samples, filtration may be necessary to remove solid particles.
2. Instrument calibration
Before conducting actual measurements, it is recommended to use standard residual carbon samples for instrument calibration to ensure accurate measurements.
Set the necessary calibration parameters according to the instrument manual.
3. Measurement steps
a. Set measurement parameters
According to the sample type and testing requirements, set parameters such as measurement temperature and heating time.
b. Add sample
Weighing the sample: Use a precision balance to weigh a certain amount of the sample to be tested (usually between 1-5 grams, according to the instrument manual).
Load into sample cup: Place the weighed sample evenly into the sample cup, and then flatten the surface.
c. Start measurement
Place the sample cup: Place the sample cup with the sample in the heating chamber of the instrument to ensure correct positioning.
Start the detection program: According to the instrument operation instructions, start the automatic measurement program. The instrument will automatically heat and monitor the generation of residual carbon in the sample.
d. Monitoring and recording
The instrument will automatically record temperature changes and residual carbon generation during the heating process. The entire process generally takes several minutes to tens of minutes, depending on the type of sample.
After the measurement is completed, the instrument will automatically calculate and provide the result of residual carbon content.
4. Data processing
The instrument will display the measurement results and record the mass or percentage of residual carbon.
If necessary, the data can be exported or recorded in the experimental report.
5. Cleaning and maintenance
a. Cleaning equipment
After each measurement, clean the sample cup and heating chamber in a timely manner to prevent residue from affecting subsequent measurements.
Regularly clean and maintain the instrument comprehensively to ensure its normal operation.
b. Regular calibration
It is recommended to regularly use standard samples for instrument calibration to ensure measurement accuracy and reliability.
6. Precautions
Safe operation: During the operation, wear appropriate personal protective equipment to avoid contact with high temperatures and harmful gases.
Sample selection: Ensure that the samples used meet the testing standards and avoid using unsuitable samples that may result in inaccurate test results.
Environmental conditions: Conduct the test in a stable temperature and humidity environment to avoid external factors interfering with the test results.
7. Common problems and solutions
Data abnormality: If the measurement result deviates significantly from the normal range, check whether the sample is contaminated or whether the instrument needs calibration.
Poor repeatability: When the results of multiple measurements of the same sample fluctuate greatly, check the uniformity of the sample and the condition of the instrument.
Instrument malfunction: If the instrument cannot be started or runs abnormally, check the power and circuit connections, and check the instrument prompt information.