Product
| ★ Resistance Range: 0.01Ω-1500Ω | 
| ★ Current Range: 0.00mA-40.0A | 
| ★ Voltage Range: 0.0V~100V | 
| ★ Ω+A same screen display | 
| ★ Fully isolated USB technology, can be connected to the computer | 
| ★ Real-time clock function | 
| ★ New black screen design, luxury | 
| ★ Quick self-test function without waiting | 
| ★ Using fast filtering technology, strong anti-interference ability | 
| ★ New design, long life clamp head | 
| ★ Safe and reliable, 500 sets of storage | 
 
 
 
 
 
 
 
 
 
 
| Model: | ES3020 | ES3020B | ES3020E | 
| Resistance range: | 0.01Ω500Ω | 0.01Ω- 1200Ω | 0.01Ω-1500Ω | 
| Current range: | N/A | 0.00mA-20.0A | 0.00mA-40.0A | 
| Voltage range: | N/A | N/A | 0.0V~100V | 
| Resistance accuracy: | ±1%±0.01Ω | ±1%±0.01Ω | ±1%±0.01Ω | 
| Resistance resolution: | 0.001Ω | 0.001Ω | 0.001Ω | 
| Current accuracy: | N/A | ±2%±1mA | ±2%±1mA | 
| Currenty resolution: | N/A | 0.01mA | 0.01mA | 
| Function | Ground resistant test, Loop resistance test, leakage current test, grounding voltage test. | 
| Ambient temperature and humidity | 23℃±5℃,below 75%rh | 
| Range | Grounding resistance:0.01-1500Ω ±1%±0.01Ω | 
| Current:0.00mA-40.0A ±2%±1mA | |
| Grounding voltage:0.0V~100V | |
| Measurement Method | Mutual induction | 
| Resistance resolution | 0.001Ω | 
| Current resolution | 0.01mA | 
| Clamp Diameter | 55mm×32mm | 
| Clock Function | Have | 
| Ω+A Synchronized display | Ω+A same screen display | 
| Display Mode | 4-digit LCD display, black screen design | 
| LCD Dimension | 46mm×29mm | 
| Meter Dimension | W/T/H: 85mm×58mmx285mm | 
| Sampling Speed | About 2 times/second | 
| USB interface | With USB interface, software monitoring, storage data can be uploaded to the computer, save the print | 
| Communication Line | USB communication line 1 | 
| Data Storage | 500 Groups, the symbol “MEM” gives indication, “FULL” mark will flash to indicate the memory has been full | 
| Data Review | "MR" symbol indication when reviewing data | 
| Overflow Display | Exceed measurement range overflow function: “OL ” symbol display | 
| Interference Test | Automatic identify interference signal, "NOISE" symbol indication when the interference current is large | 
| Alarm Function | Alarm when the measured value exceeds the alarm setting value | 
| Battery Voltage | Real-time display of battery power, reminding timely charging when battery voltage is low | 
| Automatic shut-down | "APO" instruction, automatic shutdown after 5 minutes boot | 
| Power Consumption | 50MA Max | 
| Weight | Instrument: 1180g (with battery) | 
| Working Temperature and Humidity | -10°C~40C; below 80% rh | 
| Insulation Resistance | 20Ω or more (500V between circuit and outside) | 
| Pressure Resistance | AC 3700V/rms(between circuit and outside) | 
| Suitable for Safety Regulations | IEC61010-1(CAT III 300V, CAT IV 150V, Pollution Degree 2); IEC61010-031; IEC61557-1 (grounding resistance) | 
| Model | ES3020 | ES3020B | ES3020E | 
| Earth resistance range | 0.00Ω~500Ω | 0.00Ω~1200Ω | 0.00Ω~1500Ω | 
| Current range | ○ | 0.00mA~20A | 0.00mA~40A | 
| Earth voltage | ○ | ○ | ● | 
| USB data upload function | ○ | ● | ● | 
| Real-time clock | ● | ● | ● | 
| FFT anti-interference technology | ○ | ○ | ● | 
| Data storage | ● | ● | ● | 
| Real-time indicator of battery power | ● | ● | ● | 
| Backlight | ● | ● | ● | 
| Alarm function | ● | ● | ● | 
| Battery voltage low indication | ● | ● | ● | 
| Overload protection | ● | ● | ● | 
| Meter | 1PC | 
| Meter box | 1PC | 
| 5# battery | 4PCS | 
| Monitoring Software CD | 1PC | 
| Calibration ring | 1PC | 
| USB communication line | 1PC | 
| Manual, certificate | 1SET | 

