Grounding resistor tester UHV-2571

earth resistivityfor soilfor electrical equipment

The UHV-2571 Digital Earth Resistance Meter is a portable instrument that combines three-terminal and four-terminal measurement methods using medium- and large-scale integrated circuits instead of traditional manual test-current generation. It is designed for reliable measurements of earth resistance, low conductor resistance, soil resistivity and AC voltage with enhanced anti-interference performance.

Features

• High-strength aluminium-alloy casing and industrial design for field use.
• Phase-locked loop (PLL) synchronous tracking and switch-capacitor filtering to provide strong immunity to industrial-frequency and RF interference.
• DC/AC conversion technology converts DC into low-frequency AC constant current for stable measurement.
• Allows auxiliary grounding resistance (RC) and auxiliary potential (RP) within specified limits without materially affecting results.
• No manual adjustment or balance required; 3(1/2)-digit LCD display; overflow indicated as "1".
• Measures earth resistance, low-value conductor resistance, soil resistivity and AC voltage. User manual and calibration certificate available.

Technical parameters

• Ambient temperature: 0℃ ～ +45℃
• Relative humidity: ≤85% RH
• Measuring range and constant current (RMS): Resistance: 0～2 Ω (10 mA), 2～20 Ω (10 mA), 20～200 Ω (1 mA)
• Voltage measurement range: AC 0～19.99 V
• Measurement accuracy: 0～0.2 Ω ≤ ±3% ±1d; 0.2 Ω～199.9 Ω ≤ ±1.5% ±1d; 1～19.99 V ≤ ±3% ±1d
• Resolution: 0.001 Ω, 0.01 Ω, 0.1 Ω, 0.01 V
• Allowable auxiliary grounding resistance (RC between C1 and C2): for 0～2 Ω and 2～20 Ω ranges ≤ 1 kΩ; for 20～200 Ω range ≤ 2 kΩ
• Auxiliary potential (RP between P1 and P2): RP < 40 kΩ, error ≤ ±5%
• Allowable ground voltage (effective value at power frequency): ≤ 5 V, error ≤ ±5%
• Maximum power loss: ≤ 2 W
• Power supply (DC): 8 × 1.5 V (AA, R6) batteries
• Power supply (AC): 220 V / 50 Hz
• Dimensions: 220 × 200 × 105 mm
• Weight: ≤ 1.4 kg
• Also referred to as: Ground Resistance Meter; Earth Resistance Meter

Characteristics / specifications

• Model: UHV-2571
• Measurement functions: earth resistance, low conductor resistance, soil resistivity, AC voltage
• Display: 3(1/2)-digit LCD
• Anti-interference: PLL synchronous tracking and switch-capacitor filter
• Current sources: constant current outputs for different resistance ranges (10 mA / 1 mA)
• Power: battery or mains (8 × AA or 220 V/50 Hz)
• Physical: aluminium-alloy casing; compact and lightweight (≤ 1.4 kg)