Video
ES3072 DC Resistance Tester 20A
20A High Current · 4-Wire Method · Bluetooth APP · Temperature Detection · 800 Data Sets Storage
The ES3072 DC resistance tester, also known as a transformer DC resistance tester, DC resistance quick tester, or ground continuity tester, adopts microprocessor technology and 4-wire testing method, ensuring safety, precision, and reliability. It is mainly used for measuring transformer winding resistance, mutual inductor winding resistance, ground down-lead continuity testing, cable conductor resistance, and contact resistance of switches, connectors, relays, coils, motors, and metal component connections such as equipment enclosures, lightning protection strips, ground beams, structures, cabinets, rebar, water pipes, windows, guardrails, radiators, and assembly lines. It is widely applied in telecommunications, power, meteorology, machine rooms, oil fields, power distribution lines, tower transmission lines, gas stations, factory grounding grids, lightning rods, and more.
Features
Specimen Type
Selectable materials: Cu, Al, Fe, Au, Ag
Resistance Range
10.0uΩ - 1000.0KΩ
Resolution
0.1 uΩ
Measurement Method
4-wire method test
Test Current
20A, 10A, 5A, 1A, 0.1A, 10mA, 1mA
Max Short-Circuit Current
20A
Temperature Detection
Yes, external temperature probe & internal temperature sensor, dual sensor design
Data Storage
800 data sets
Mobile APP
Yes, Bluetooth connection
Detail Images
Specifications
| Function | Mainly used to measure transformer DC resistance, mutual inductor winding resistance, ground grid continuity, cable conductor resistance, contact resistance of switches, connectors, relays, coils, motors, transformer windings, metal riveting resistance, metal component bonding resistance, low-value resistance testing, contact resistance testing, etc. |
| Specimen Type | Selectable materials: Cu, Al, Fe, Au, Ag |
| Resistance Range | 10.0uΩ - 1000.0KΩ |
| Resolution | 0.1 uΩ |
| Overflow Display | "OL" symbol displayed when over-range |
| Measurement Method | 4-wire method test |
| Test Current | 20A, 10A, 5A, 1A, 0.1A, 10mA, 1mA |
| Max Short-Circuit Current | 20A |
| Temperature Detection | Yes, external temperature probe & internal temperature sensor, dual sensor design |
| Temperature Conversion | Yes, temperature conversion, can convert to 75℃ measurement result |
| Overload Protection | Yes |
| Automatic Discharge | Yes |
| Power Supply | DC14.6V 12000mAh high-capacity lithium battery |
| Charging Function | Yes |
| Display Mode | 5-inch touchscreen (854dots × 480dots) full-color LCD display |
| Interaction Method | Touchscreen / buttons |
| LCD Size | L×W: 108mm × 65mm |
| Instrument Dimensions | L×W×H: 277.2mm × 227.5mm × 153mm |
| Test Lead Length | 5 meters, red and black each 1 piece |
| Mobile APP | Yes, Bluetooth connection |
| PC Software | Yes, USB cable connection |
| Data Storage | 800 data sets |
| Data Review | Data review function |
| Printer | Built-in printer on instrument panel, press print key to print test results |
| Battery Voltage | Real-time battery level display, prompts charging when battery is low |
| Auto Power Off | Selectable: off, 5min, 10min, 15min, 20min, 25min, 30min |
| Power Consumption | Standby: approx. 4W (30% brightness); Measurement: 100W Max |
| Weight | Instrument: 3.1kg (including battery); Test leads: 850g |
| Operating Temp/Humidity | -10℃～40℃; below 70% RH |
| Storage Temp/Humidity | -20℃～60℃; below 70% RH |
| Insulation Resistance | Above 10MΩ (between circuit and housing at 500V) |
| Withstand Voltage | AC 3700V/rms (between circuit and housing) |
| Electromagnetic Characteristics | IEC61010-4-3, radio frequency electromagnetic field ≤1V/m |
| Applicable Safety Standards | IEC61010-1, CAT Ⅲ 600V, Pollution Degree 2, JJG724-1991, JJG166-1993, DL/T967-2005 |
Product Accessories
| Instrument | 1 unit |
| Test Leads | 2 pcs (red, black each 1) |
| Temperature Probe | 1 pc |
| Standard Resistor | 1 pc |
| CD | 1 pc |
| Data Cable | 1 pc |
| Charger | 1 pc |
| User Manual / Warranty Card | 1 set |
| Instrument Case | 1 pc |