| Basic Functions |
Range |
Best Accuracy |
| Model |
|
UT523A |
| Earth resistance |
0.00Ω～19.99Ω |
±(2%+5) |
| 20.0Ω～199.9Ω |
±(2%+5) |
| 200Ω～1999Ω |
±(2%+5) |
| 2.00kΩ～19.99kΩ |
±(2%+5) |
| 20.0kΩ～210.0kΩ |
±(2%+5) |
| Soil resistivity |
0.00Ωm～99.99Ωm |
Decided by measuring precision of R: (ρ=2πaR a:1 m～100m, π=3.141) |
| 100.0Ωm～999.9Ωm |
| 1000Ωm～9999Ωm |
| 10.00kΩm～99.99kΩm |
| 100.0kΩm～999.9kΩm |
| 1000kΩm～9000kΩm |
| Earth voltage |
AC 0.00～750V |
±(2%+5) |
| Testing resistance |
128Hz/111Hz/105Hz/94Hz(AFC) |
√ |
| Features |
| Measuring method |
Earth resistance: rated current pole changing method with Max 20mA measuring current;
soil resistivity: quadrupole method (Wen-Na method );
earth voltage: average rectifier (between P(S) and ES interfaces) |
√ |
| Short-circuit testing current |
AC 30mA max |
√ |
| Open-circuit testing voltage |
AC 40V max |
√ |
| Auto range |
|
√ |
| Distance between electrodes |
1m～200m can be set. |
√ |
| Testing voltage waveform |
Sine wave |
√ |
| Line voltage |
Measure when the voltage is below 750V AC |
√ |
| Low battery indicator |
≤7.5V |
√ |
| Data hold |
|
√ |
| Alarm function |
|
√ |
| RS232 interface |
|
√ |
| Withstand voltage |
AC 3700V/rms(between circuit and case) |
√ |
| LCD backlight |
|
√ |
| Data storage |
300 groups |
√ |
| Auxiliary earth resistance test |
0.00KΩ～30kΩ(100R+rC<50kΩ, 100R+rP<50kΩ) |
√ |
| Overload protection |
Earth resistance measurement: input 280V AC between C(H) and E, P(S) and ES for 3s |
√ |
| Interference test |
Auto identify interference signals, when interference voltage is higher than 5V, the symbole NOISE is displayed. |
√ |
| Measuring time(s) |
More than 5000 times (perform short circuit test once, and again after 30s) |
√ |
| Insulation resistance |
Above 20MΩ (500V between circuit and case) |
√ |
| General Characteristics |
| Power supply |
DC 9V (6 Zinc-manganese dry batteries, R14S 1.5V; can continuously standby for 300hrs) |
| LCD size |
128mm×75mm |
| Product color |
Red and grey |
| Product weight |
1443g (including batteries) |
| Product size |
215mm×190mm×95mm |
| Standard accessories |
Standard test lead, simple test lead, batteries, PC software CD, RS232 interface cable |
| Standard Individual Packing |
Tool box, gift box, English manual, warranty card |
| Standard Quantity Per Carton |
4pcs |
| Standard Carton Measurement |
650mm×560mm×300mm |
| Standard Carton Cross Weight |
30kg (including batteries) |
