The UT521 is used to carry out earth resistance and ac earth voltage testing across a variety of ranges.
The device is incredibly simple to use and features a simple rotary dial on the front for switching between test parameters and a large test button for activating once all necessary test leads have been connected up.
When performing earth resistance testing the UT521 is able to test from 0-20Ω (with accuracy of ±(2%+10), 0-200Ω (±2%+3) and 0-2000Ω (±2%+3). When testing AC earth voltage this device tests between 0-200V with best accuracy of ±(1%+4). It also has selectable frequency of 50/60Hz.
The device displays all test results as a numerical value on the build in screen. It also includes data hold for briefly storing data and can store 20 records permanently.
Additional features included backlit display, over-range display, double insulation protection, low battery indicator and more.
This earth ground tester is manual ranging and it can perform both simple 2-wire testing and precision 3-wire testing.
This product runs on 6 x 1.5V Alkaline batteries.
Earth resistance measurements with three selectable ranges
AC earth voltage testing
Backlit LCD screen
Auto power-off and low battery indicator
Data hold and data logging
Double insulation protection
Contact badness display -Port C or Port E no contact display
Performs both 2-wire and 3-wire testing
Full List of Products Included
UNI-T UT521 Earth Ground Tester
Simplified Test Lead
UNI-T UT521 Technical Specifications
Basic Functions /Range Best /Accuracy
Earth Resistance Testing /0 ~ 20W /±2%rdg±0.1W
Earth Resistance Testing /0 ~ 200W /±2%rdg±3dgt
Earth Resistance Testing /0 ~ 2000W /±2%rdg±3dgt
Earth Voltage Testing /0~200Vac(50/60Hz) /±1%rdg±4dgt
Data Logging 20
Sleep Mode Around 10 Minutes
Full Icon Display
Over-range Display Display "OL"
Contact Badness Display C Port or E Port don't contact Display"- - - - W"
Simple 2-Wires Testing
Precision 3-Wires Testing
Double Insulation Protection
Power: 1.5V Alkaline Battery (AA) x 6 (Not Included)
LCD Size: 70.6 mm x 34 mm
Product Color: Grey
Product Net Weight: 560g With no packing 1.5 with Pack and Accessories
Product Size: 160 x 100 x 70.5 mm
Standard Accessories: Three Test Lead (Green + Yellow + Red), English Manual, Simple Test Lead, Carrying Bag, Test Probe 2 pcs