The UT620T DC Resistance Tester, also known as the Transformer DC Resistance Tester or DC Resistance Fast Tester, adopts the four-wire measurement method, ensuring safety, precision, and reliability. It is widely applied in telecommunications, power systems, meteorology, data centers, oil fields, power distribution lines, transmission towers, gas stations, factory grounding networks, lightning rods, and other fields for DC resistance measurement.
Features
- Certifications: ROW
- Test Currents: 12V/<5mA, 40mA, 200mA, 400mA, 1A, 5A, 10A
- Step Adjustment:
- 1A steps for 1-10A range
- 40mA steps for 40-400mA range
- Total of 20 adjustable steps
- Measurement Range: 100.0μΩ – 1.0000MΩ
- Temperature conversion based on conductor material (copper/aluminum)
- 999 sets of data storage & 7-inch color LCD
- Built-in printer & USB interface
- Audible discharge & audible alarm (Beep)
- Protection features: Reverse EMF/Discharge/Overheat protection
- Auto power off (around 10 minutes)
- Built-in lithium battery pack (14.8V/5000mAh)
- Supports AC 180-240V/50Hz power input
| Specification | Range | Minimum Resolution | Accuracy | Overrange display | |||
| AC 220V power supply | Built-in battery | ||||||
| Constant-current 10A position | 100.0μΩ – 1.5000Ω | 100.0μΩ – 200.00mΩ | 0.1μΩ | Constant-current:±0.1% rdg ± 0.1% fs | >Maximum range | ||
| Constant-current 9A position | 300.0μΩ – 1.6000Ω | 300.0μΩ – 320.00mΩ | 0.1μΩ | ||||
| Constant-current 8A position | 600.0μΩ – 1.8000Ω | 600.0μΩ – 440.00mΩ | 0.1μΩ | ||||
| Constant-current 7A position | 900.0μΩ – 2.0000Ω | 900.0μΩ – 560.00mΩ | 0.1μΩ | ||||
| Constant-current 6A position | 1.2000mΩ – 3.0000Ω | 1.2000mΩ – 680.00mΩ | 0.0001mΩ | ||||
| Constant-current 5A position | 1.5000mΩ – 4.0000Ω | 1.5000mΩ – 800.00mΩ | 0.0001mΩ | ||||
| Constant-current 4A position | 2.0000mΩ – 4.0000Ω | 2.0000mΩ – 1.5000Ω | 0.0001mΩ | ||||
| Constant-current 3A position | 2.5000mΩ – 6.0000Ω | 2.5000mΩ – 3.0000Ω | 0.0001mΩ | ||||
| Constant-current 2A position | 5.0000mΩ – 10.000Ω | 5.0000mΩ – 6.0000Ω | 0.0001mΩ | ||||
| Constant-current 1A position | 10.000mΩ – 20.000Ω | 10.000mΩ – 12.000Ω | 0.001mΩ | ||||
| Constant-current 400mA position | 50.000mΩ – 50.000Ω | 50.000mΩ – 30.000Ω | 0.001mΩ | ||||
| Constant-current 360mA position | 60.000mΩ – 50.000Ω | 60.000mΩ – 36.000Ω | 0.001mΩ | ||||
| Constant-current 320mA position | 70.000mΩ – 60.000Ω | 70.000mΩ – 42.000Ω | 0.001mΩ | ||||
| Constant-current 280mA position | 80.000mΩ – 70.000Ω | 80.000mΩ – 48.000Ω | 0.001mΩ | ||||
| Constant-current 240mA position | 90.000mΩ – 80.000Ω | 90.000mΩ – 54.000Ω | 0.001mΩ | ||||
| Constant-current 200mA position | 100.00mΩ – 100.00Ω | 100.00mΩ – 60.000Ω | 0.01mΩ | ||||
| Constant-current 160mA position | 200.00mΩ – 125.00Ω | 200.00mΩ – 80.000Ω | 0.01mΩ | ||||
| Constant-current 120mA position | 300.00mΩ – 160.00Ω | 300.00mΩ – 100.00Ω | 0.01mΩ | ||||
| Constant-current 80mA position | 400.00mΩ – 250.00Ω | 400.00mΩ – 120.00Ω | 0.01mΩ | ||||
| Constant-current 40mA position | 500.00mΩ – 500.00Ω | 500.00mΩ – 300.00Ω | 0.01mΩ | ||||
| AUTO position | 100.0μΩ – 1.0000MΩ | 100.0μΩ- 1.0000MΩ | 0.1μΩ | ||||
| Constant-voltage 12V/＜5mA | 1.0000Ω – 1.0000MΩ | 1.0000Ω – 1.0000MΩ | 0.0001Ω | Constant-voltage:±2% rdg ± 0.5% fs | |||
| AUTO position | 100.0μΩ – 1.0000MΩ | 100.0μΩ- 1.0000MΩ | 0.1μΩ | ||||
| Length display range | 0.0001 M – 999.99 KM | 0.0001 M | ±0.5% | >999.99KM | |||
| Range of resistance value setting for 1m wire | 0.100μΩ – 500.00Ω | 0.100μΩ | ±0.5% | ||||
| DC Resistance test Position | Support fixed gear and step adjustment | ||||||
| Ambient temperature display | Insert the standard temperature line to display the ambient temperature normally (accuracy +/-2°C) | ||||||
| Data storage | After the test is completed, the data can be saved automatically, cyclically, and manually. A maximum of 9999 sets of data can be stored. | ||||||
| Discharge alert | After the test is over, the buzzer sounds to indicate that it is discharging, and the buzzer stops sounding after the discharge is completed | ||||||
| Printer | A printer is embedded in the instrument panel, and the test results are printed by pressing the print button | ||||||
| Test method | Four-wire test, tap test lead + test clamp at both ends | ||||||
| Display mode | 7-inch LCD color screen | ||||||
| Power supply | Rechargeable lithium battery 14.8V 5000mAh or AC 180-240V/50Hz | ||||||
| Rated current | 40mA-10A | ||||||
| Resistance test range | 100μΩ～1MΩ | ||||||
| High Voltage Warning | When a reverse voltage is detected, a hazard warning symbol flashes to warn | ||||||
| Automatic discharge | ✔ | ||||||
| Backlight function | Adjustable backlight brightness (1-5 brightness levels in total) | ||||||
| Communication function | Data can be transferred by USB flash disk, etc., Bluetooth function (optional) | ||||||
| Battery level display | ✔ | ||||||
| Low battery and position selection | When there are 2 levels of power left in the battery, it cannot output a position greater than 2A. When there is 1 level of power left, it cannot output a position greater than 400mA. | ||||||
| Auto-shutdown function | When using battery power, it will automatically shut down after about 10 minutes of no operation when powered on | ||||||
| Power switching | By default, it is battery-powered, and when it is switched to mains power, the battery symbol changes to AC plug symbol | ||||||
| Testing transformers | It can test the internal resistance of transformers below 1000kVA normally | ||||||
| Meter dimension | Approx. 386mm (L) × 318mm (W) × 159mm (H) | ||||||
| Meter weight | 7.1kg (Without accessories） | ||||||
| Altitude | ≦2000m | ||||||
| Working environment | 0°C~40°C relative humidity below 80% (no condensation) | ||||||
| 40°C~50°C relative humidity below 70%. | |||||||
| Minus 20°C~60°C relative humidity below 80% (no condensation) | |||||||
| Reference standards | JJG 166-2022 “DC Standard Resistor Verification Regulations” | ||||||
| JJG 1052-2009 “Verification Regulations for Loop Resistance Tester and Direct Resistance Meter” | |||||||
| Color | Ash black | ||||||
| Accessories | 1． Tester：1 pc 2． Quick guideline instruction： 1 pc 3． Operating guide for downloading general files：1 pc 4． Specialized Test leads（Red and black test leads: 1 pair; Black grounding wire: 1 pc）：3 pcs 5． Standard resistor：1 pc 6． Dedicated lithium battery charger: 1 pc (Model: LY036SPS-168200W2) 7． Power cord: National-standard three-pin plug: 1 pc; National-standard two-pin flat plug: 1 pc 8． Temperature and environment measurement cable (with NTC): 1 pc 9． USB cable：1 pc 10． Carrying bag：1 pc 11． Fuse： 2 pcs for 30A/250V; 2 pcs for 5A/250V 12． Thermal papers：2 rolls | ||||||
| Standard packing | Tool box + carton + carrying bag | ||||||
| Standard quantity per carton | 1 pc | ||||||
| Standard carton measurement | 460*385*385MM | ||||||
