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Description
UNI-T UT522 Earth Ground TesterSpecifications Range UT522 Earth resistance () 0~20 0~200 0~2000 0~40 (2%+20) 0~400 (2%+3) 0~4000 (2%+3) AC earth voltage (V) 0~200V 0~400V (1%+6) Frequency: 50Hz 60Hz Features Display count 4000 Manual range Auto power off Around 10 minutes Low battery indication Data hold Data storage 20 LCD backlight Full icon display Double insulation protection Poor contact display Over range display Display OL Simple 2 wire testing Precise 3 wire testing General
| Specifications | Range | UT522 |
| Earth resistance (Ω) | 0~20Ω | |
| 0~200Ω | ||
| 0~2000Ω | ||
| 0~40Ω | ±(2%+20) | |
| 0~400Ω | ±(2%+3) | |
| 0~4000Ω | ±(2%+3) | |
| AC earth voltage (V) | 0~200V | |
| 0~400V | ±(1%+6) | |
| Frequency: 50Hz/60Hz | √ | |
| Features | ||
| Display count | 4000 | |
| Manual range | √ | |
| Auto power off | Around 10 minutes | √ |
| Low battery indication | √ | |
| Data hold | √ | |
| Data storage | 20 | |
| LCD backlight | √ | |
| Full icon display | √ | |
| Double insulation protection | √ | |
| Poor contact display | “…Ω” | √ |
| Over-range display | Display “OL” | √ |
| Simple 2-wire testing | √ | |
| Precise 3-wire testing | √ | |
| General Characteristics | ||
| Power | 1.5V battery (LR6) x 6 | |
| Display | 70.6mm x 34mm | |
| Product color | Red and grey | |
| Product net weight | 560g | |
| Product size | 160mm x 100mm x 70.5mm | |
| Standard accessories | Batteries, simple test leads with alligator clips, standard test leads with alligator clips, | |
| earth spike, gallus | ||
| Standard individual packing | Gift box, carrying bag, English manual | |
| Standard quantity per carton | 8pcs | |
| Standard carton measurement | 530mm x 300mm x 350mm (0.056 CBM per standard carton) | |
| Standard carton gross weight | 19kg | |
Shipping Notes
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4.4 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 5
Educational & Interesting Bathroom Reader
Format: Paperback
I bought this for my husband for Christmas given that he loves history. I figured it’d be a hit as a bathroom reader… I was right and it’s become a fixture right next to the toilet paper! He likes that it challenges him to think. Now there’s no need to take his phone into the bathroom!
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Reviewed in the United States on March 25, 2026
★★★★★ 5
Great trivia!
Format: Paperback
This is a great read! Especially for history buffs. Great to get yourself ready for trivia for scholastic bowl! Highly recommend!
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Reviewed in the United States on January 1, 2026
★★★★★ 4
BCE? No, it is BC!
Format: Paperback
I love history; there is a lot in this book I did not know. It is definitely a challenge and a great way to learn. I took off one star (considered taking off two) because the author uses the non-Christian term of BCE. I HATE seeing that instead of what it really is BC - before Christ! I wonder if he is an atheist.
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Reviewed in the United States on December 27, 2025
★★★★★ 5
Useful knowledge
Format: Paperback
Great gift for the guy that thinks he's a know-it-all.
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Reviewed in the United States on January 1, 2026
★★★★★ 5
Very informative
Format: Paperback
Bought this for my son, and he really loves this book. He reads it over frequently. I recommend it if you have a reader that also wants to learn facts about history.
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Reviewed in the United States on May 1, 2026