The YN2571 ground resistance tester is a new type of ground resistance measurement that abandons the traditional manual hand-cranked power generation method, uses medium and large-scale integrated circuits, and uses DC/AC conversion technology to combine the three-terminal and four-terminal button measurement methods into one model. instrument. The working principle is that the built-in DC/AC converter converts the DC into a low-frequency constant current of AC, which forms a loop through the auxiliary ground electrode C and the measured object E. An AC voltage drop is generated on the measured object and is sent through the auxiliary ground electrode P The AC amplifier is amplified, and then sent to the meter head for display after detection. With the aid of the rate switch, three different limits can be obtained: 0～2Ω, 0～20Ω, 0～200Ω.

1. The YN2571 grounding resistance tester adopts high-strength aluminum alloy as the case in its structure. In order to prevent power frequency and radio frequency interference, the circuit adopts a phase-locked loop synchronous tracking detection method and is equipped with a switched capacitor filter, so that the meter has better resistance. Interference capability

2. Using DC/AC conversion technology to convert DC into AC low-frequency constant current for easy measurement;

3. The auxiliary grounding resistance is allowed to vary between 0～2KΩ (RC) and 0～40KΩ (RP), so as not to affect the measurement results;

4. This meter does not need to manually adjust the balance, 3 (1/2) LCD display, in addition to ground resistance, it can also measure low-resistance conductor resistance, soil resistivity and AC ground voltage;

5. If the test loop fails, the meter displays "1" for overflow, which is in line with conventional measurement habits.

1. Conditions of use

Ambient temperature: 0℃~+45℃

Relative humidity: ≤85%RH

2. Measuring range and constant current value (effective value)

Resistance: 0~2Ω(10mA), 2~20Ω(10mA), 20~200Ω(1mA)

Voltage: AC 0~20V

3. Measurement accuracy and resolution

Accuracy: 0~0.2Ω≤±3%±2d

0.2Ω~200Ω≤±1.5%±1d

1~20V≤±3%±1d

Resolution: 0.001Ω, 0.01Ω, 0.1Ω, 0.01V

4. Measurement error caused by ground voltage

·Allowable ground voltage ≤5V (power frequency effective value) error ≤±5%

5. Power supply and power consumption

MAX power loss≤2W

Power supply: 6.8V~9V (7 section 5# rechargeable battery pack), external 220V AC power supply for charging.

Volume: 220mm×200mm×105mm

Weight: ≤1.4kg