The BO2571-II grounding resistance tester is composed of medium to large-scale integrated circuits This table has high output power, high short-circuit current value, and multiple output voltage levels (each model has four voltage levels) The working principle is that the DC high voltage generated by the internal battery as the power source through DC/DC conversion is sent from the E pole to the L pole through the tested object, thereby generating a current from E to the L pole. After I/V conversion and division by a divider, the measured insulation resistance value is directly displayed on the LCD Suitable for measuring grounding resistance of various devices and measuring low resistance conductor resistance values in departments such as power, postal and telecommunications, railways, communications, and mining; This table can also measure soil resistivity and ground voltage

Grounding resistance tester, megohmmeter, digital megohmmeter, pointer megohmmeter, insulation meter, high-voltage grounding resistance tester

1. Structurally, high-strength aluminum alloy is used as the casing. In order to prevent power frequency and radio frequency interference, a phase-locked loop synchronous tracking and detection method is adopted in the circuit, and a switch capacitor filter is used to provide the instrument with good anti-interference ability

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

3. Allow the auxiliary grounding resistance to vary between 0-2K Ω (RC) and 0-40K Ω (RP) without affecting the measurement results

4. This instrument does not require manual adjustment of balance, with a 3 (1/2) position LCD display. In addition to measuring ground resistance, it can also measure low resistance conductor resistance, soil resistivity, and AC ground voltage

5. If the test circuit is not connected and the header displays "1", it indicates overflow, which is in line with conventional measurement habits

1. Usage conditions

Environmental temperature: 0℃~+45℃

Relative humidity: ≤85%RH

2. Measurement 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: 0~0.2 Ω≤± 3% ± 1d

0.2Ω~200Ω≤±1.5%±1d

1~20V ≤±3%±1d

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

4. Measurement errors caused by auxiliary grounding resistance and ground voltage

Allow auxiliary grounding resistance RC (between C1 and C2) to be less than 1.8k Ω;

RP (between P1 and P2)<40K Ω Error ≤± 5%

Allowable ground voltage ≤ 5V (effective value of power frequency) with an error of ≤± 5%

5. Power supply and power consumption

Maximum power loss ≤ 2W

Power supply: 6.8V~9V (6 pieces of 5 # cadmium nickel rechargeable batteries), charged with an external 220V AC power supply

Volume: 220mm×200mm×105mm

Weight: ≤1.4kg