How should the stability meter be operated?

The stability tester comprises a main unit, a force-measuring device, a flow-value measurement device, a printing device, and related accessories. It boasts advantages such as safe and reliable operation, stable performance, simple operation, and a long service life. It is primarily used for determining the stability and flow value in Marshall tests. The specific operating procedure for the stability tester is as follows:

　　1. After installing the instrument, immerse the indenter and the specimen in water at 60°C for half an hour according to the prescribed procedures, then remove them. Place the specimen into the indenter, insert the flow-rate sensor, and press the [Start] button. The instrument will automatically record the pressure (i.e., stability) applied to the specimen along with its corresponding flow-rate value. At the same time, the printer will output the test results for this specimen. Once printing is complete, the instrument will automatically lower the mechanical component to a predetermined height, making it convenient to replace the specimen.

　　2. If, after the specimen undergoes compressive deformation, the pressure window displays 99.99, it indicates that the specimen’s pressure has exceeded 30 kN (or 50 kN) but the specimen remains undamaged. The instrument will automatically stop and halt the test, while simultaneously lowering the loading section to a predetermined height.

　　3. If you press the [Start] button, the lift platform rises slightly but stops before the pressing head even touches the pressure sensor, displaying “99.99” on the screen. Then, the platform descends again. This indicates that the wiring between the pressure sensor and the instrument or sensor is not properly connected, or that the pressure sensor has become disconnected from its connecting joint. For troubleshooting procedures, please refer to the Troubleshooting section of the user manual.

　　Precautions for using the stability meter:

　　1. The pressure and flow sensor plugs must not be inserted incorrectly; if they don’t go in, try inserting them in one direction only.

　　2. The grounding wire for the instrument power supply shall be grounded separately.

　　3. If the power grid experiences significant disturbances or voltage fluctuations, users who have the means should equip themselves with an AC purification power supply; those without such means should equip themselves with an AC voltage regulator.

　　5. When the instrument is not in use, please cover it with a cloth to prevent dust from entering.

　　6. Do not share power outlets with high-power electrical appliances.

　　7. The instrument should be placed in a dry location, and the connector should not be constantly plugged and unplugged to prevent poor contact of the plug.

　　8. In areas with high humidity, the sensor should be stored in a drying cabinet.

　　9. The load-bearing parts of the control cable and printer cable must not be subjected to pressure.

　　10. Do not open or disassemble the instrument without permission.

11. Before use, power on the instrument and let it run for at least 10 minutes.

　　The stability analyzer’s large-screen graphic LCD directly displays the test data, curves, and test duration for both stability and flowability values. Chinese characters provide an intuitive display of the test results. The device can internally store up to 100 sets of test data and test durations, which can be recalled and viewed at any time. The testing process is fully automated and features automatic reset functionality. This unit is equipped with an RS232 serial communication port for convenient connection to a host computer. The computer can process, store, print, and display the data, and can also control the testing and printing processes via computer. Additionally, this unit offers manual control options for raising, lowering, and stopping the device.