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Current (customizable)/ Range/ Resolution/ Accuracy
200A /- /- /
100A/ 0.1uΩ~1999.9uΩ/ 0.1uΩ/ ±(0.4%rdg+0.04%FS)
100A/ 2.000mΩ~9.999mΩ/ 0.001mΩ/ ±(0.4%rdg+0.04%FS)
50A/ 10.00mΩ~99.99mΩ/ 0.01mΩ/ ±(0.4%rdg+0.04%FS)
5A/ 100.0mΩ~499.9mΩ/ 0.1mΩ/ ±(0.4%rdg+0.6%FS)
5A/ 500mΩ~1000mΩ/ 0.1mΩ/ ±(0.4%rdg+0.6%FS)
Functions
To test the contact resistance of low/medium/high-voltage circuit breakers;
To test bus connections and other high-current connection points.
Resistance measurement: 0.1uΩ~1000mΩ: 0.1uΩ
Test method:
Four-wire Kelvin test;
Separation of current and voltage electrodes eliminates internal wiring impedance and contact resistance for more accurate measurements;
Minimizes measurement errors to achieve high-precision results when measuring low-resistance components.
Noise suppression: At 100 mV differential pressure, the noise frequency of the test lead is 50-60 Hz.
Stepping test current:
5A~ 100A DC
Stepping current:5A or 10A
Test time: 10S、20S、30S、60S, stepping time: 1s.
Test duration: The maximum continuous testing time for a single run is 60 seconds.
Resistance value comparison:
Pre-set value: 0.000~9999.9mΩ;
Compare measured and set resistance values, automatically display “PASS” or “FAIL”
Over range indication:
Low Limit Alert: When the loop resistance measurement is low limit, the measurement interface will display “LO”;
Over-limit indication: when the loop resistance measurement exceeds the limit, the measurement interface will display “OL”;
Self-inspection:
Yes, Self-calibration via standard accessory “shunt” to verify measurement accuracy and ensure reliable data.
UT625A: 750μΩ; UT625B: 375μΩ
Open circuit voltage: voltage: 5V DC
Overheating protection: ✔
Output power: Measurement power ≤ 250W
Display: 7 inch color LCD
Printer: Built-in thermal printer
Input power supply: AC 198V~242V（50/60Hz）
Data Communication:
Supports PC connection (via USB cable).
Real-time analysis
Historical data review
Excel report generation
Data storage: 200 sets; auto/manual save, Circular save
Backlight: 5 levels adjustable backlight
Low battery indication: ✔
Working environment: -20°C~+50°C ; <85% R.H., no condensation
Storage environment: -30°C~+60°C ; <85% R.H., no condensation
