RX-I type resistivity tester

This instrument focuses on typical soil types such as expansive soil, loess, and composite clay (cement soil) as research objects. Through systematic indoor experiments, it grasps the basic laws of electrical resistivity changes during the water absorption and expansion process of unsaturated expansive soil, the collapsibility process of loess, and the strength growth process of cement soil, and establishes a resistivity evaluation system to describe structural changes. On this basis, establish the relationship between macroscopic mechanical property indicators and electrical resistivity indicators, and analyze the electrical resistivity indicators of unsaturated soil suction changes
Main technical parameters:
Constant current source: Output current: DC0.01-20A, continuously adjustable
Constant current accuracy: better than ± 0.05%
DC digital voltmeter:
Measurement range: 0-199.99mV
Sensitivity: 10 μ A
Basic error: ± (0.004% reading ± 0.01% full-scale), input impedance: ≥ 0.3%
Resistance measurement error: ≤ 0.3%, probe spacing: 1.59 ± 0.01mm, probe diameter Φ 0.8mm
Drift rate:<0.2% Probe material: Hard alloy (WC)
Probe pressure: 3 ± 1N/single needle, power supply: AC 220V ± 10% 50/60Hz. Power: 12W
Usage environment: Temperature: 23 ± 2 ℃ Relative temperature: ≤ 65%