Description
ADVANCED EARTH RESISTANCE TESTER UT572 UNI-T
UT572 is for measuring earth resistance and soil resistivity. It can automatically check interface connection and detect interference voltage/frequency, with data hold and indication functions. It can perform 2/3/4-wire measurements for different on-site applications, such as power equipment wiring and lightning protection equipment.
Features
Certifications: CE, UKCA
● Large 4-digit LCD Display, 5s sampling time
● 2/3/4-wire earth resistance and soil resistivity measurements
● Selectable test frequencies (94Hz/128Hz)
● Disturbance voltage (Ust) and frequency (Fst) measurement
● Earth resistance, RH and RS measurements
● LCD backlight; auto power off
● Data hold
● 20 sets of data storage
● Double insulation
● Compensating resistance RK measurement
| Category | Specification (UT572) |
|---|---|
| Measurement Functions | Earth resistance (2‑wire / 3‑wire / 4‑wire); soil resistivity |
| Earth Resistance Ranges | 4 Ω, 40 Ω, 400 Ω, 4 kΩ, 40 kΩ |
| Soil Resistivity Ranges | 4 Ω to 40 kΩ (computed from Earth resistance and spacing) |
| Accuracy (Earth Resistance) | ±(3% + 15 digits) at 2 Ω; ±(3% + 5 digits) at higher ranges |
| Accuracy (Soil Resistivity) | ±(3% + 5 digits) |
| Disturbance Voltage Range | Up to 50 V AC/DC (40 Hz–500 Hz); accuracy ±(3% + 3 digits) |
| Disturbance Frequency Range | 40 Hz – 500 Hz; accuracy ±(1% + 2 digits) |
| Test Signal Frequencies | 94 Hz or 128 Hz selectable |
| Soil Resistivity Test Distance | 1 m to 40 m |
| Auxiliary Resistance (RK) Test | Supported |
| Auxiliary Grounding (RH/RS) | Yes, measured to support accuracy compensations |
| Display | LCD with backlight |
| Data Storage | Up to 20 test results (recallable) |
| Data Hold | Yes |
| Low‑Battery Indicator | Alerts when battery voltage ≤ 9.5 V |
| Auto Power‑Off | Yes (after ≈ 5 minutes idle) |
| Safety Rating | CAT III 300 V; double insulation (EN 61010‑1, 61010‑2‑033, 61010‑031) |
| Power Supply | 8 × AA (1.5 V) batteries |
| Overload Protection | AC 220 V between terminals for up to 10 s |
| Insulation Resistance | > 50 MΩ (1000 V to housing) |
| Withstand Voltage | AC 3540 V for 5 s between circuit and housing |
| Sampling Interval | Approx. 5 seconds |
| Display Size | ~125 × 37 mm (LCD module) |
| Weight (net) | Approx. 1.1 kg (without batteries) |
| Dimensions | 210 × 175 × 90 mm |
| Operating Temperature | 0 °C to +40 °C; humidity < 80% RH (< 75% during storage) |
| Included Accessories | Eight AA batteries, standard and simple leads with alligator clips, four earth spikes, carry case, user manual |
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