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The UNI-T UT522 is a portable digital earth resistance tester supporting precise three-wire and simplified two-wire measurements up to 4000Ω. It also measures AC earth voltage up to 400V and includes the leads and auxiliary earth spikes required for field testing.
| Specification | Details |
|---|---|
| Brand | UNI-T |
| Model | UT522 |
| Tester Type | Digital earth resistance tester |
| Measurement Methods | Precise three-wire and simplified two-wire testing |
| Earth Resistance Ranges | 0–40Ω / 0–400Ω / 0–4000Ω |
| 40Ω Range Accuracy | ±(2% + 20 digits) |
| 400Ω Range Accuracy | ±(2% + 3 digits) |
| 4000Ω Range Accuracy | ±(2% + 3 digits) |
| AC Earth Voltage Range | 0–400V |
| AC Earth Voltage Accuracy | ±(1% + 6 digits) |
| Earth Voltage Frequency | 50Hz / 60Hz |
| Display Count | 4000 counts |
| Ranging | Manual |
| Data Storage | 20 readings |
| Display | Backlit LCD with full function-symbol display |
| Additional Functions | Data hold, low-battery indication, over-range display and poor-contact indication |
| Insulation Protection | Double insulated |
| Automatic Power-Off | Approximately 10 minutes |
| Certifications | CE and UKCA |
| Power Supply | 6 × 1.5V AA batteries |
| LCD Size | 70.6 × 34mm |
| Dimensions | 160 × 100 × 70.5mm |
| Net Weight | Approximately 560g |
