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Uni-T Digital Clamp Meter 20A AC UT278A+ Maximum Jaw Opening 32mm Up To 1200Ω
Clamp Meters

Uni-T Digital Clamp Meter 20A AC UT278A+ Maximum Jaw Opening 32mm Up To 1200Ω

The Uni-T UT278A+ digital clamp meter measures ground resistance without disconnecting ground lines or using auxiliary electrodes, as well as leakage current. It measures resistance from 0.01 Ω with a...

The Uni-T UT278A+ digital clamp meter measures ground resistance without disconnecting ground lines or using auxiliary electrodes, as well as leakage current. It measures resistance from 0.01 Ω with a resolution of 0.001 Ω and features double insulation to help limit environmental interference.

The four-digit EBTN LCD has a backlight and displays Ω and A...

See Description & Specifications See Description & Specifications

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Reviews (4)

Reviews

4.8
4
4.8
Review this product
  1. 3
  2. 1
  3. 3 stars
    0
  4. 2 stars
    0
  5. 1 star
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  • Manolis_Foukakis
    4
    3 out of 3 members found this review helpful
    Manolis_Foukakis

    Verified purchase

    The measurements are very good, verified with very reliable and calibrated instruments. Attention ⚠ to the instructions for use. To get accurate measurements, you need to read them carefully. Four stars because it sometimes makes me do calculations. As for durability, time will tell

    Translated from Greek ·
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  • 5
    mixalissav

    Verified purchase

  • 5
    georkoro66

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  • 5
    Efthimis_Papadop

    Verified purchase

Product report

Description & Specifications

The Uni-T UT278A+ digital clamp meter measures ground resistance without disconnecting ground lines or using auxiliary electrodes, as well as leakage current. It measures resistance from 0.01 Ω with a resolution of 0.001 Ω and features double insulation to help limit environmental interference.

The four-digit EBTN LCD has a backlight and displays Ω and A simultaneously. The device includes auto-ranging, measurement hold and recall, automatic calibration, and a resistance limit alarm. It also features visual and audible alarms, interference detection, an overrange indicator, and automatic power-off.

  • Display: Digital
  • AC current: 20 A
  • Maximum jaw opening: 32 mm
  • Ground resistance measurement: 0.01–1200 Ω
  • Resistance resolution: 0.001 Ω
  • Ground resistance measurement accuracy: ±(1%+0.01) for 0.01–0.99 Ω, ±(1%+0.1) for 1–49.9 Ω, ±(1.5%+0.5) for 50–99.5 Ω, ±(2%+1) for 100–199 Ω, ±(5%+5) for 200–395 Ω, ±(10%+10) for 400–590 Ω, ±(20%+20) for 600–800 Ω, and ±(25%+30) for 800–1200 Ω
  • Leakage current measurement: 0 mA–20 A
  • Leakage current measurement accuracy: ±(2.5%+1 mA) for 0–9 mA, ±(2.5%+5 mA) for 10–99 mA, ±(2.5%+10 mA) for 100–299 mA, ±(2.5%+0.1 A) for 0.3–2.99 A, ±(2.5%+0.3 A) for 3–9.9 A, and ±(2.5%+0.5 A) for 10–20 A
  • Display: Four-digit EBTN LCD, 47 × 28.5 mm
  • Measurement memory: 300 readings
  • Power supply: 4 × 1.5 V AA (LR6) batteries
  • Dimensions: 285 × 85 × 56 mm
  • Package contents: Clamp meter, 4 AA batteries, calibration loop, plastic carrying case, user manual

Manufacturer

Manufacturer Details

Warnings & Safety Information

Dimensions

Maximum Jaw Opening
32 mm

Maximum Jaw Opening

The maximum cable or conductor diameter that the clamp can grip in order to perform a measurement.
with Test Leads
No
AC Current
20 A
Indication
Digital
Bluetooth
No
ISO/NIST Calibration Certificate
No

Features & Functions

Inrush Current
No

Inrush Current

Ability to record the instantaneous inrush current (duration ~100ms) absorbed by electric motors, motor-driven devices, and compressors during their momentary startup.
True RMS
No
NCV
No
LoZ (Low Impedance / Low Impedance)
No

LoZ (Low Impedance / Low Impedance)

Low impedance function that absorbs induced/parasitic voltages ("phantom" voltages or ghost voltages) from adjacent cables, ensuring that you measure only the actual line voltage.
VFD Mode / LPF (Low Pass Filter)
No

VFD Mode / LPF (Low Pass Filter)

Integrated low-pass filter that cuts off high-frequency harmonic noise (PWM) produced by variable speed drives, allowing accurate voltage and frequency measurement in Inverters.
Temperature Measurement
No

Temperature Measurement

Ability to measure temperature via a connected thermocouple (Type-K terminal), allowing temperature monitoring of pipes, refrigerants, and HVAC components.
Capacitor Capacitance Measurement
No

Capacitor Capacitance Measurement

Ability to test and measure capacitor capacitance, allowing the immediate diagnosis of worn starting capacitors in motors, pumps, and compressors.

Important information

Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.

Reviews (4)

4.8
4
4.8
Review this product
  1. 3
  2. 1
  3. 3 stars
    0
  4. 2 stars
    0
  5. 1 star
    0
Review this product
  • Manolis_Foukakis
    4
    3 out of 3 members found this review helpful
    Manolis_Foukakis

    Verified purchase

    The measurements are very good, verified with very reliable and calibrated instruments. Attention ⚠ to the instructions for use. To get accurate measurements, you need to read them carefully. Four stars because it sometimes makes me do calculations. As for durability, time will tell

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    mixalissav

    Verified purchase

  • 5
    georkoro66

    Verified purchase

  • 5
    Efthimis_Papadop

    Verified purchase
400,00 €
14,00 €   shipping cost