Overview

The UNI-T UTE310 Series is a single-phase high-resolution digital power meter for precision power-conversion and energy-measurement work. It samples at 1 MSa/s across a DC to 300 kHz bandwidth and resolves current to 0.1 µA and voltage to 1 mV — fine enough to measure milliwatt standby draw and the switching content that an AC line meter averages away.

Four models share one measurement platform. The base UTE310 covers 75mV – 600V / 5mA – 20A from a 75 mW floor; the high-voltage UTE310H extends to 75mV – 1000V / 10mA – 50A for high-line and high-power work. Either is available with GPIB in place of RS-232 (G/HG) for instrument-bus automation. Sampling, resolution, bandwidth, harmonic analysis and the measurement firmware are identical across all four.

Choosing Your Model — UTE310 Series

The UTE310 name spans four models on one platform. They differ only by voltage/current range and communication interface — the 1 MSa/s sampling, 0.1 µA current resolution, DC–300 kHz bandwidth, 50th-order harmonic analysis and energy integration are identical. Compare the full series before selecting:

Choose the voltage class that covers your line (600 V base, 1000 V on the H models) and the interface your bench uses.

The UTE310 is the high-resolution single-phase instrument in the line. For three-phase or multi-rail measurement see the 3-channel UTE323 Series; for compact AC panel metering see the UTE9800+ Series — distinct instrument lines for different measurement needs.

Key Features

• Single-phase true-power measurement — V, A, W, VA, PF, Hz and energy
• 0.1 µA current resolution, 1 mV voltage resolution — measures down to a 75 mW power floor
• 1 MSa/s sampling — resolves fast switching-load transients
• DC to 300 kHz measurement bandwidth
• Harmonic analysis to the 50th order
• Energy integration (Wh / Ah) with selectable refresh from 0.1 s
• 600 V base range; 1000 V / 50 A on UTE310H / UTE310HG
• D/A analog output for chart-recorder and DAQ integration
• 4.3-inch TFT-LCD — V, A, W and PF shown together
• USB + LAN + Digital I/O standard; GPIB in place of RS-232 on G / HG

UNI-T UTE310 Series Details

0.1 µA / 1 mV Resolution — Measures What Panel Meters Miss

Current resolves to 0.1 µA and voltage to 1 mV, with a power floor of 75 mW. That is fine enough to characterize milliwatt-class standby and sleep-mode draw, leakage current and low-load efficiency — measurements a compact AC panel meter, resolving in tens of microamps and watts, cannot make.

×UTE310 measurement screen — V, A, W, PF and frequency shown together

1 MSa/s Sampling & DC–300 kHz Bandwidth

Switching converters and motor drives put energy well above the line fundamental. The UTE310 samples at 1 MSa/s across a DC to 300 kHz bandwidth, so PWM ripple, switching harmonics and fast load steps are captured in the power calculation rather than averaged away.

×1 MSa/s sampling captures fast load transients

Harmonic Analysis to the 50th Order

Per-order harmonic measurement to the 50th order quantifies distortion on the input current of rectifier and PFC front ends — the data needed for power-quality and standby-compliance assessment.

×Harmonic analysis to the 50th order

Energy Integration

Watt-hour and amp-hour integration accumulate consumption over a test window for efficiency runs, standby-energy measurement and long-duration profiling, with the result held on screen.

×Integration (Wh / Ah) accumulation over time

Waveform Display

Live voltage and current waveforms confirm what the meter is measuring — useful for spotting clipping, asymmetry or a miswired CT before trusting the numbers.

×Live voltage and current waveform display

D/A Output & External Scaling

A D/A analog output drives a chart recorder or DAQ for trend logging, and external CT/PT scaling extends the current and voltage range for high-power lines without changing the instrument.

×D/A analog output for chart-recorder / DAQ integration

Averaging for Stable Readings on Noisy Loads

Selectable averaging steadies the reading on switching loads whose instantaneous power swings cycle-to-cycle, so efficiency and PF figures settle to a number you can record rather than chase.

×Averaging modes for stable readings on noisy loads

GPIB in Place of RS-232 — UTE310G / UTE310HG

The G and HG models substitute a GPIB (IEEE-488) port for the RS-232 port — they do not add GPIB alongside it. If your ATE rack is built on a GPIB instrument bus, the G/HG models drop in directly; if you automate over LAN or USB (standard on every model), the base UTE310 / UTE310H already covers you and the G/HG variant is unnecessary. USB, LAN and Digital I/O are present on all four models regardless.

Voltage Class — UTE310 / G (600 V) and UTE310H / HG (1000 V)

The base UTE310 / UTE310G measure to 75mV – 600V and 5mA – 20A. The UTE310H / UTE310HG extend to 75mV – 1000V and 10mA – 50A for high-line, high-power and three-phase-leg measurement. The measurement engine is identical — the H models change the input range and front end, nothing else.

Applications

Switching-Supply & Converter Efficiency

Measure input and output true power on SMPS, DC/DC and PFC stages to calculate efficiency directly. The 1 MSa/s / 300 kHz front end keeps switching content in the measurement instead of averaging it out.

Motor-Drive & Inverter Input Power

The 1000 V / 50 A range on the UTE310H covers VFD and inverter input measurement; harmonic analysis quantifies the distortion a non-linear front end pushes back onto the line.

Automated Characterization

USB and LAN are standard on every model for LabVIEW / Python-VISA sweeps over load and line; the G/HG models add GPIB for GPIB-based instrument-bus racks. Digital I/O supports pass/fail hand-off in end-of-line test.

Specifications

Accessories and Family Options

UTE-series test cables and the UTE-M01-US North-American test fixture support safe connection to standard plug loads. Pair the UTE310 with a UNI-T programmable DC source or electronic load for a complete efficiency-characterization bench.

Frequently Asked Questions

What is the difference between UTE310 and UTE310H?

Range. The UTE310 measures to 75mV – 600V / 5mA – 20A; the UTE310H extends to 75mV – 1000V / 10mA – 50A. The measurement engine, accuracy, sampling and firmware are identical.

Do the G and HG models add GPIB on top of RS-232?

No — they substitute GPIB for the RS-232 port. USB, LAN and Digital I/O are present on every model. If you automate over LAN or USB you do not need the G/HG variant.

Can it measure DC as well as AC power?

Yes. The measurement bandwidth is specified from DC, so DC, AC and mixed-mode power are all measured.

Does it measure harmonics?

Yes — per-order harmonic analysis to the 50th order, for power-quality and compliance work.

Warranty

This instrument is backed by UNI-T's 3+2 Year Warranty — 3 years of standard coverage, plus 2 additional years free when you register your product. That's 5 years of total protection at no extra cost.

The warranty covers manufacturing defects and component failures under normal use conditions. UNI-T instruments are built for professional daily use, and our warranty reflects that commitment to long-term reliability.