The measurement methods of soil compaction tester are mainly divided into two types: mechanical pointer type and electronic sensor type. The following are the specific operating steps:

1、 Operation steps of mechanical pointer measuring instrument

1. Preparation stage

Leveling the soil surface: Remove obstacles such as weeds and stones from the surface of the measuring point to ensure that the probe is not disturbed when inserted vertically.

Calibration instrument: Place the probe in the air or on a standard hardness block, rotate the calibration knob to zero the pointer, and ensure the accuracy of the measurement reference.

Select probe: Choose a probe with a suitable shape (conical or cylindrical) based on the soil type (such as sand or clay), and a standard probe can be used for routine measurements.

2. Measurement phase

Vertical insertion probe: Insert the probe vertically into the soil at a uniform speed (about 2-5cm/s) to a preset depth (such as 10cm, 20cm), avoiding errors caused by tilting or rapid insertion.

Read data: After the pointer stabilizes, directly read the soil compaction value (usually in kPa or kg/cm ²) from the dial.

Repeat measurement: Insert 2-3 times at the same position and take the average to improve data accuracy.

3. Closing phase

Cleaning the probe: Rotate the probe sleeve counterclockwise to remove the attached soil and then re fix it to avoid residue affecting the next measurement.

Zeroing operation: Rotate the driven needle knob to reset the pointer to zero, preparing for the next measurement.

2、 Operation steps of electronic sensor measuring instrument

1. Preparation stage

Installation and calibration: Connect the sensor plug, handle, and host, and calibrate according to the instructions after turning on (such as placing it in the air or on a standard hardness block).

Set parameters: Use the display screen or buttons to set measurement units (kPa, psi, etc.), depth, data storage interval, and other parameters.

Select probe: Replace probes of different shapes or sizes according to needs (such as long probes used for deep measurement).

2. Measurement phase

Vertical insertion probe: The probe is driven by a motor or manually inserted at a constant speed to the target depth. Electronic instruments usually have built-in motors to ensure constant speed.

Data recording: Wait for the display screen values to stabilize before recording the data. Some instruments can synchronously display parameters such as soil temperature and moisture content.

Automatic storage: Electronic instruments can automatically store data (such as 500-1000 sets) and support exporting to computers or mobile phones through USB, Bluetooth, or WiFi.

3. Closing phase

Cleaning the probe: Use a soft bristled brush or damp cloth to remove any residual soil from the probe and avoid corroding the sensor.

Data export: Generate data reports and soil compaction distribution maps through supporting software to facilitate the analysis of soil spatial variation.