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The digital grounding resistance meter adopts a high-strength aluminum alloy as a casing. In order to prevent power frequency and radio frequency interference, a phase-locked loop synchronous tracking detection method is used on the circuit and a switched capacitor filter is provided, so that the instrument has good anti-interference capability.
Digital grounding resistance meter measurement range:
Resistance: 0 to 2Ω (10mA), 2 to 20Ω (10mA), 20 to 200Ω (1mA)
Voltage: AC0～20V
Measurement accuracy and resolution accuracy: 0~0.2Ω≤±3%±1d
0.2Ω～200Ω≤±1.5%±1d
1～20V≤±3%±1d
Resolution: 0.001Ω, 0.01Ω, 0.1Ω, 0.01V
Auxiliary Earth Resistance and Ground Voltage Caused by Measurement Error (1) Allowable Auxiliary Earth Resistance RC (between C1 and C2) <1.8KΩ
RP (between P1 and P2) <40KΩ
Error ≤±5%
(2) Allowable ground voltage ≤ 5V (effective rms frequency) error ≤ ± 5%
Power and power consumption maximum power loss ≤ 2W
DC: 8×1.5V (AA, R6) Battery AC: 220V/50Hz
Volume: 220×200×105mm
Weight: ≤1.4kg
Digital grounding resistance meter structure and measurement range
Digital grounding resistance meter structure features: