The UNI-T UT256B is a True RMS open-jaw clamp meter for measuring AC and DC current up to 200A without disconnecting the conductor. Its fork-style 14.7mm opening provides quick access in crowded panels, while additional voltage, resistance and capacitance functions support electrical troubleshooting.
Key Features
- Measures AC and DC current up to 200A with 0.1A resolution
- Open-jaw fork design accepts conductors up to approximately 14.7mm in diameter
- True RMS measurement for improved accuracy on non-sinusoidal signals
- Measures AC/DC voltage, resistance and capacitance
- NCV detection, zero, relative and data-hold functions for electrical troubleshooting
Product Specifications
| Specification |
Details |
| Brand |
UNI-T |
| Model |
UT256B |
| Meter Type |
True RMS AC/DC open-jaw clamp meter |
| AC Current Range |
Up to 200A |
| AC Current Resolution |
0.1A |
| AC Current Accuracy |
±(2.5% + 5 digits) |
| AC Current Frequency Response |
50Hz to 60Hz |
| DC Current Range |
Up to 200A |
| DC Current Resolution |
0.1A |
| DC Current Accuracy |
±(2.5% + 5 digits) |
| AC Voltage Range |
Up to 750V |
| AC Voltage Accuracy |
±(1.2% + 3 digits) |
| DC Voltage Range |
Up to 1000V |
| DC Voltage Accuracy |
±(0.8% + 3 digits) |
| Resistance Range |
Up to 60MΩ |
| Capacitance Range |
Up to 60mF |
| Display Count |
6000 counts |
| Measurement Response |
True RMS |
| Maximum Conductor Diameter |
Approximately 14.7mm |
| Ranging |
Automatic |
| Voltage Detection |
NCV non-contact AC voltage detection |
| Additional Test Functions |
Diode test and audible continuity test |
| Additional Functions |
Zero mode, relative mode, data hold, LCD backlight and automatic power-off |
| Input Impedance |
≥10MΩ |
| Safety Category |
CAT II 1000V / CAT III 600V |
| Certifications |
CE, RoHS and cETLus |
| Power Supply |
2 × 1.5V AA batteries |
| Display Size |
36.5 × 24mm |
| Dimensions |
210 × 53 × 35mm |
| Net Weight |
Approximately 164g including batteries |
Applications
- Current measurement in crowded electrical panels
- Automotive and battery-powered DC system testing
- Electrical installation inspection and troubleshooting
- Control-panel and industrial equipment maintenance
Included Components
- UNI-T UT256B True RMS AC/DC open-jaw clamp meter
- Test leads
- 2 × 1.5V AA batteries
- Carrying bag and user documentation