Description
The UNI-T UT278D, alongside the UT278A, UT278B, and UT278C variants, represents the pinnacle of ground resistance and leakage current diagnostics. Engineered for multi-grounded systems, this advanced clamp meter allows technicians to measure earth resistance without disconnecting ground wires or deploying auxiliary electrodes in standard clamp mode, while also supporting traditional ground pile measurements for complex networks. Built with Original Engineering standards, the UT278 series ensures high-fidelity data acquisition for critical infrastructure maintenance.
Technical Specifications
Brand: UNI-T
Model: UT278D (Series includes UT278A, UT278B, UT278C)
Measurement Method: Mutual induction clamp / Ground pile auxiliary
Earth Resistance Range (Clamp): 0.01Ω to 1200Ω
Earth Resistance Range (Pile): up to 2000Ω
Resistance Resolution: 0.001Ω
Leakage Current Range: 0.00mA to 20.0A
Current Resolution: 0.01mA
Accuracy: ±1% + 0.01Ω
Jaw Capacity: Ø 32mm
Display: 4-digit LCD with Backlight
Data Storage: 300 measurement groups
Interface: RS-232 / USB data transmission
Overload Indication: OL symbol display
Interference Recognition: Automatic noise signal detection
Operating Temperature: -10°C to 55°C
Operating Humidity: 10% to 90% RH
Power Supply: 6V DC (4 x 1.5V AA batteries)
Weight: 1.18 kg
Dimensions: 285mm x 85mm x 56mm
Safety Certification: CE, RoHS, IEC61010-1, CAT III 300V, CAT IV 150V
Industrial Application
The UT278D is purpose-built for validating grounding networks in power distribution grids, telecommunications towers, railway signaling systems, and petrochemical refineries. Its dual-mode capability to perform both clamp-on and ground pile measurements provides unparalleled Technical Compatibility across diverse field environments. By rapidly identifying high-resistance faults and subtle leakage currents in lightning protection systems, it prevents catastrophic equipment failures and ensures personnel safety in high-voltage zones.
Procurement and Lifecycle
Designed for rigorous field deployment and continuous industrial use, this instrument minimizes diagnostic downtime and maximizes operational safety. We ensure an optimized Lead Time for global B2B procurement, delivering fully calibrated and certified units ready for immediate integration into your predictive maintenance and safety compliance protocols.
Key Attributes
Max. Ac Current: 40 A
Max. DC Current: 40 A
Measuring Voltage Range: 600V
Place of Origin: China
Model Number: UT278D
Brand Name: UNI-T
Dimensions: 40*30*15cm
Display Type: Digital Only
Max. Ac Voltage: 600V
Max. DC Voltage: 600 V
Measuring Capacitance Range: ,
Measuring Current Range: 0.000A to 60A
Measuring Inductance Range: ,
Measuring Resistance Range: 0.00Ω to 2000Ω
Operating Temperature: -10℃ to 50℃
Parameters Measured: DC Current, AC Voltage, DC Voltage, Resistance, AC Current
Weight: 3kg
Ground Resistance: 0.00Ω to 2000Ω
Current (AC): 0.000A to 60A
3 or 4-wire method resistance: 0.00Ω to 3KΩ
Ground voltage: 600V
Screen: 2.4 inch (46*29mm) color LCD
Data storage: 500 set
Packaging and Delivery
Selling Units: Single item
Single package size: 40X32X16 cm
Single gross weight: 4.000 kg
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