Earth resistance tester HZRC3000B

earth resistivityfor electrical appliancesfor electrical installations

Product Overview
The HZRC3000B Earth Resistance and Soil Resistivity Tester by Huazheng is a portable instrument for measuring earth resistance, soil resistivity, earth potential and AC voltage. It supports precise 4‑pole, 3‑pole and simple 2‑pole measurement methods and integrates FFT and AFC technologies for improved anti‑interference and stable repeatability. It features large backlit LCD, onboard memory and RS232 output for software monitoring and reporting, making it suitable for power, telecom, meteorology, oilfield, construction, lightning protection and industrial electrical testing.

Key Features

• Measurement modes: precise 4‑pole, 3‑pole and simple 2‑pole earth resistance.
• Soil resistivity measurement (Wenner 4‑pole method supported).
• Anti‑interference: FFT and AFC with automatic noise recognition; selectable test frequencies (128/111/105/94 Hz).
• Large 4‑digit LCD with blue backlight, LED flash indicator and progress bar during measurement.
• Onboard memory for up to 300 data sets; RS232 interface for PC upload and software supervision.

Applications

• Power systems and substations
• Telecommunications and antenna grounding
• Lightning protection and earthing maintenance
• Geotechnical and site resistivity surveys
• Oil & gas sites, construction and industrial electrical testing

Operation & Indicators

• LCD countdown, LED flash and progress bar during measurements for clear status feedback.
• Icons for MEM (storage), FULL (memory full), HOLD/READ; audible alarm when measured value exceeds preset threshold.
• Automatic range selection and manual override for targeted tests.

Power & Battery

• Power supply: DC 9 V via 6 × R14S (1.5 V) dry batteries (device labelled specification).
• Standby time: approx. 300 hours (depending on use and backlight).
• Battery low indicator; replace batteries when indicated.

Accessories (standard)

• Test leads: standard 4‑wire set (e.g. red 20 m, black 20 m, yellow 20 m, green 10 m) plus simple 2‑wire sets for 2‑pole tests.
• Auxiliary earth rods: 4 pcs Ø10 mm × 150 mm.
• RS232 communication cable (~1.5 m) for PC connection; carry case and user manual.

Measurement Capabilities

• Earth resistance range: 0.00 Ω – 30.00 kΩ with multiple subranges and automatic/manual selection.
• Soil resistivity range: 0.00 Ω·m – 9000 kΩ·m using configurable electrode spacing (1 m – 100 m) via Wenner method.
• Measurement current: AC short‑circuit test current up to 20 mA max; open‑circuit test voltage AC up to 40 V max.

Technical specifications

• Model: HZRC3000B
• Earth resistance accuracy: typically ±2% rdg ±3 dgt on low ranges; higher ranges per manual (e.g. ±4% rdg ±3 dgt).
• Resolution examples: 0.01 Ω (low ranges), 0.1 Ω, 1 Ω, 10 Ω, 1 kΩ depending on range.
• Test frequencies (AFC): 128 Hz / 111 Hz / 105 Hz / 94 Hz.
• Display: 4‑digit super‑large LCD with blue backlight; LCD frame approx. 128 × 75 mm.
• Dimensions: host approx. 215 × 190 × 95 mm; weight tester ~1,443 g (battery included); total package ~4.5 kg.
• Memory: up to 300 sets; data export, report and print via software over RS232.
• Standards: IEC61326, IEC61010‑1, IEC61557 series; JJG‑366‑2004 references for resistivity.