Asphalt bending beam flowmeterDeveloped using microcomputer automatic control technology, high-precision sensor technology, refrigeration technology, and pneumatic control technology, it is mainly used to measure the bending creep stiffness and m value of asphalt. This method can be used for original asphalt, pressure aged asphalt, and aged asphalt after film oven (or rotary film oven). The instrument has a compact structure and beautiful style, and the entire process is fully automated by a microcomputer for testing.
Calibration is an important step in ensuring the accuracy and reliability of test data, mainly involving the calibration of two core parts: displacement and pressure
Preparation before calibration:
Before starting calibration, it is necessary to ensure that the equipment has been correctly installed and the basic settings have been completed. This includes placing the workbench in the test chamber, connecting the wiring between the host, power box, and refrigeration unit, and connecting the power and gas sources. At the same time, an appropriate amount of industrial alcohol needs to be added to the test chamber, and the refrigeration machine and main unit power should be turned on.
Displacement calibration:
Displacement calibration is the first step in calibration, aimed at ensuring the measurement accuracy of displacement sensors.
Enter the calibration interface: Enter the displacement calibration interface in the control software.
Calibration point selection: Place the displacement contact at the lowest point, second highest point, and highest point of the displacement calibration block in sequence, and select the corresponding point for calibration on the software interface.
Complete calibration: After clicking "Start taking values" for each point, select "OK" in the pop-up dialog box to complete the calibration of all calibration points in sequence.
Pressure calibration:
Pressure calibration is used to ensure the accuracy of the force values applied by the loading system.
Initial contact point calibration: Enter the pressure standard interface, select "Hanging" and click "Start Value" to perform initial calibration. Then, adjust the loading handle with slight pressure to ensure that the loading head (duck head) is in good contact with the rear beam (which can be determined by observing the changes in the current voltage value), and click "Start Taking Values" again.
Weight calibration: Place standard weights of 50 grams, 100 grams, and 200 grams on the pressure calibration bracket in sequence, and click "Start Taking Values" to calibrate.
Loading force adjustment: After calibration is completed, enter the test interface and adjust the loading handle to stabilize the displayed loading force within the standard range of 980 millinewtons ± 50 millinewtons. This process may require multiple repeated adjustments to ensure accuracy.
Verification after calibration:
After completing the above calibration, it is recommended to conduct a complete testing process to verify the calibration effect. This includes placing the specimen in a test chamber for constant temperature curing for 1 hour, then conducting a standard test, and finally calculating and saving the test results in software.