Introduction to Relevant Usage Issues of the Electric Compaction Tester

      The electric compaction apparatus was developed in accordance with the road testing industry standards issued by the Ministry of Transport. Its structure fully meets the requirements for preparing compacted specimens in both the California Bearing Ratio (CBR) test and the Resilient Modulus test, and it features two compaction modes: light compaction and heavy compaction.

　　Installation and Commissioning of the Electric Compaction Apparatus:

　　1. Place the machine on a flat, level surface.

　　2. Connect the wires extending from the host to the output terminals on the back panel of the controller. (10 cores)

　　3. Connect the power cable to the input terminal on the rear panel of the controller. (Quad-core)

　　4. Insert the power cord into the power source.

　　5. Press the Set/Start button on the controller to put it into setup mode.

　　6. Turn the knob to 03.

　　7. Press the power on/off button to turn on the power.

　　8. Press the Set/Start button to make it bounce, and the machine will begin running.

　　9. After automatic shutdown, the manufacturer of the electric compaction tester believes that if the compaction hammer lifts up and the wiring is correct, the machine should operate normally. However, if the compaction hammer falls into the test tube, the motor will reverse direction. In this case, simply swap the positions of any two live wires on the power plug and retest the machine until, after automatic shutdown, the compaction hammer returns to its raised or lowered position.

　　Instructions for Use of the Electric Compaction Tester:

　　1. First, check the three power cables, the instrument’s power switch, and the counter section. Tighten the screws on all parts of the test tube. Then, turn on the power, press the jog button, and observe the direction of motion of the frame. If the frame moves upward, it’s rotating in the forward direction; reverse rotation is prohibited.

　　2. The manufacturer of the electric compaction tester advises checking whether the compaction hammer is positioned at the bottom of the test tube. If the compaction hammer is not at the bottom, gently tap it to ensure it falls to the bottom of the test tube. Otherwise, once the compaction hammer is lifted, it will fail to fall back down.

　　3. Check the gap between the compaction hammer and the wall of the test cylinder (typically 3–5 mm), and avoid striking the cylinder wall.

　　4. Set the required number of compaction passes.

　　5. Press the Start button to begin operation. The digital display on the panel will increase with each hammer strike, and the machine will automatically stop once the preset target value is reached (indicating that one operational procedure has been completed).

　　6. If the hit is hard, you can run the program above.

　　The manufacturer of the electric compaction tester believes that the testing method for the electric compaction tester is:

　　Pour the prepared sample into the graduated cylinder 3–5 times. After each pour, level off the surface of the sample and secure the cylinder to the machine. Large-test-tube samples.

　　According to the three-layer method, each sample should weigh 800–900 g (the compacted sample should be equal to or slightly greater than one-third of the cylinder’s volume); according to the five-layer method, each sample should weigh approximately 400–500 g (the compacted sample should be equal to or slightly greater than one-fifth of the cylinder’s volume).

　　Operating Procedures for the Electric Compaction Tester:

　　1. Before the test, first turn on the power and inspect the compaction apparatus to ensure that the instrument is in good working condition and ready for use.

　　2. Based on the soil sample, select either a 100-mm or a 152-mm compaction cylinder and compaction ring, and replace the corresponding compaction base (after completing the above steps, if the hammer is higher than the support plate, unscrew the support plate to prevent the hammer from falling; then screw the support plate back in and restart the equipment).

　　3. Install the compaction cylinder and the liner. According to the specified requirements, layer the prepared soil sample into the test cylinder, level the surface of each layer, and then lower the tracking plate onto the compacted specimen.

　　4. Adjust the counter. Typically operates in “non-protected” mode. It can perform automatic counting, automatic reset, and cyclical operation without requiring preset settings. When you press the “Jog” (yellow) button, the instrument’s transmission mechanism will temporarily activate, lifting the hammer. The “Jog” switch can be used to observe the rotation direction and to add soil into the test cylinder.

　　5. Press the “Start” (green) button, and the machine will automatically stop once it reaches the preset number. If you notice any abnormalities during the compaction process, press the stop button switch.

　　6. After compacting the first layer, lift the tracking plate, “shake loose” the sample layer, and then add the second layer of soil sample. Repeat the above procedure to compact the remaining layers.

　　7. After compaction, restore the instrument and turn off the power. Wipe the test tube, protective tube, base, tracking plate, and hammer.

　　8. Regularly lubricate moving parts and keep the instrument clean at all times.