The Intelligent Equipotential Tester (also called DC Low Resistance Tester, DC Resistance Tester, Ohmmeter, Micro-ohmmeter) uses the precise 4-wire measurement method to deliver accurate and reliable results. It serves as a dedicated instrument for testing the quality of equipotential bonding between metal components in buildings—including lightning protection strips, ground beams, structural steel, floor reinforcement, water pipes, radiators, bathroom fixtures, doors, windows, balconies, and kitchens.
This versatile tester also measures connection conductor resistance between electrical equipment and ground grids, contact resistance of circuit breakers, switches, and socket contacts, as well as coil resistance, shunt resistance, metal riveting resistance of vehicles/ships/aircraft, welding joint resistance, and more. Housed in an IP65 waterproof, shockproof, and drop-resistant protective case, it is robust and durable. Equipped with a large-capacity rechargeable lithium battery pack, it suits outdoor construction sites perfectly.
Additional features include alarm, clock, and wire length measurement—calculating length by comparing standard wire resistance with the full-length resistance. The tester consists of a host (with a large backlit LCD, bar graph display, and 400-group data storage), monitoring software, test leads, charger, and USB cable. The software supports historical data reading, viewing, saving, reporting, and printing. Widely used by construction quality inspection stations, supervision companies, contractors, lightning protection firms, power departments, and ship/locomotive factories, this Intelligent Equipotential Tester meets diverse professional testing needs.
| Range | Measurement Range | Accuracy | Resolution |
|---|---|---|---|
| 0.3Ω Range | 0.0001Ω ~ 0.3000Ω | ±1%rdg±10dgt | 0.0001Ω |
| 3Ω Range | 0.300Ω ~ 3.000Ω | ±1%rdg±5dgt | 0.001Ω |
| 30Ω Range | 3.000Ω ~ 30.00Ω | 0.01Ω | |
| 300Ω Range | 30.0Ω ~ 300.0Ω | 0.1Ω | |
| 3kΩ Range | 300Ω ~ 3000Ω | 1Ω | |
| 30kΩ Range | 3.00kΩ ~ 30.00kΩ | 0.01kΩ |
| Feature | Specification |
|---|---|
| Function | Equipotential bonding resistance test, low-resistance test, DC resistance test, connection conductor resistance test, contact/riveting resistance test, wire length test, etc. |
| Power Supply | DC 7.4V 2.6Ah rechargeable lithium battery, full charge voltage ~8.4V |
| Working Current | Max 4A during measurement when fully charged |
| Detection Method | Precise 4-wire method, 2-channel A/D simultaneous detection |
| Measurement Range | 0.0001Ω ~ 30.00kΩ |
| Wire Length Test | L: ≤999999m |
| Standard Wire Length | Setting range: 1m~30m |
| Test Interface | C1 (current +), C2 (current -), P1 (voltage +), P2 (voltage -) |
| Measurement Time | 2 seconds/time |
| Data Storage | 400 groups (data not lost when power off or battery replaced) |
| Alarm Setting | Threshold range: 1Ω~30Ω, 00Ω disables alarm; Alarm function not activated on startup |
| Alarm Prompt | “Beep-beep-beep” when test value exceeds threshold |
| Test Indication | Blue TESTING light flashes during test |
| Charging Indication | Charger indicator red when charging, green when full |
| Data Hold | Automatically holds result after each test |
| Clock Function | 24-hour clock, displays hour and minute |
| Test Wires | 4 pieces: 2 red-black wires, each 5m long |
| Backlight Function | Controllable gray-white backlight, suitable for dim environments |
| Display Mode | LCD; Size: 128mm×75mm |
| Host Size | 280mm×260mm×160mm |
| Mass | 2270g |
| Line Voltage | Avoid live line measurement |
| Overflow Display | “OL” symbol for overrange |
| Low Voltage Indication | Symbol displays when battery voltage drops to 6.8V±0.1V, reminding to charge |
| Working Temperature and Humidity | -10℃~40℃; ≤80%rh |
| Storage Temperature and Humidity | -10℃~60℃; ≤70%rh |
| Protection Class | IP65 (with cover closed) |
| Charging Interface | Yes |
| USB Interface | With USB port, software monitoring, data upload, save, print |
| Withstand Voltage | AC 3700V/rms (between shell and screws) |
| Suitable Safety Regulations | IEC61010-1, CAT III 600V, Pollution Degree 2; JJG724-1991 “Verification Regulation for DC Digital Ohmmeters”; JJG166-1993 “Verification Regulation for DC Resistors”; 《DL/T967-2005 Verification Regulation for Loop Resistance Testers and DC Resistance Rapid Testers》 |
