RUOSHUI 4106A 4016 Earth Resistance Tester 3-Pole 4-Pole Method Measurement AC True RMS Large LCD Display With LED Backlight Basic features of the product

Basic measurement functions
Earth resistance measurement (RE)
Measurement method: 3-pole method, 4-pole method
Measuring range: 0.02Ω～1999Ω
Minimum resolution: 0.01 Ω
Basic accuracy: 5%
Soil resistivity measurement (ρ)
Measurement range: 0.01Ω·m～376.8KΩ·m
Interval of auxiliary earth rods, setting range: 1.0 m ~ 30.0 m.
AC true RMS voltage E.V
Measurement range: 0~50V
AC bandwidth: 40Hz ~ 200Hz
Measurement basic accuracy: 2%
Earth test other features

Earth resistance measurement adopts square wave excitation test, the maximum open-circuit voltage is 50Vp-p, and the short-circuit current is Automatic range detection in earth resistance measurement.
RK resistance test, the line resistance effect can be removed.
Earth comparison test, the measurement result can be evaluated by the preset "pass/fail (✓ / ✘)" limit and be given audio alarms accordingly.
General features of the product

Operating temperature and humidity
Rated transient overvoltage:6K (1.2*50us) I, II, III measurement peak value
Withstand voltage:AC8320V(50/60Hz)/5 seconds (between the circuit and the outer box)
Insulation impedance:1000MΩ or greater/DC1000V (between the circuit and the outer box)
Vibration and shock:Randomness 2g, 5 to 500Hz 1m drop test
Calibration period and warm-up time
To ensure the accuracy of this table, the calibration period is one year or other
The warm-up time after turned on is 10 minutes or other
Power supply:Powered by 8 x 1.5 V LR6(AA) alkaline batteries
15V power adapter power supply
Automatic shutdown operation: automatic shutdown time 0~90 minutes can be set
Size and weight:178 × 110 × 59 (mm), about 600g (including batteries)