Overview

The UNI-T UTE323 Series is a three-channel high-precision digital power meter for three-phase and multi-rail power measurement. Three synchronized measurement channels capture a full three-phase system — or three independent DC/AC rails — in one instrument, with per-channel and total power, power factor, frequency, energy and harmonics.

It samples at 300 kSa/s across a DC to 300 kHz bandwidth and supports every standard wiring configuration (1P2W / 1P3W / 3P3W / 3P4W / 3V3A). The UTE323 communicates over RS-232; the UTE323G substitutes GPIB for instrument-bus racks. Measurement firmware and accuracy are identical.

Choosing Your Model — UTE323 Series

Two models, one platform. They differ only by communication interface — channel count, accuracy, 300 kSa/s sampling, wiring modes and harmonic analysis are identical:

Choose by the interface your test bench uses.

Need single-phase high-voltage measurement, or a compact panel meter? See the single-channel UTE310 Series (600 V / 1000 V single-phase) or the UTE9800+ Series compact power meters — distinct instrument lines for different measurement needs.

Key Features

• Three synchronized measurement channels — full three-phase or three independent rails
• Wiring modes: 1P2W / 1P3W / 3P3W / 3P4W / 3V3A
• 300 kSa/s synchronous sampling on all channels
• DC to 300 kHz measurement bandwidth
• Per-channel and total power, PF, frequency and energy
• Harmonic analysis to the 50th order, per channel
• Energy integration (Wh / Ah) per channel
• 5-inch TFT-LCD with simultaneous waveform display
• D/A analog output for external recording
• RS-232 standard; GPIB on UTE323G in its place

UNI-T UTE323 Series Details

GPIB in Place of RS-232 — UTE323G

The UTE323G substitutes a GPIB (IEEE-488) port for RS-232 — it does not add GPIB alongside it. USB and LAN are present on both models, so if you automate over LAN the base UTE323 already covers you; the UTE323G is for racks built on a GPIB instrument bus.

Applications

Three-Phase Inverter & Motor-Drive Efficiency

Measure three-phase output power and per-phase imbalance on inverter and motor-drive designs in a single instrument, with synchronous sampling that holds phase relationships true.

Multi-Rail & Multi-Converter Test

Three independent channels measure three DC/AC rails or three converters at once — one instrument instead of three single-channel meters on a multi-output power-electronics bench.

Production & QA Test Bench

Per-channel limits, energy integration and a single RS-232/GPIB or LAN connection make the UTE323 a compact end-of-line and QA power-test station for small test labs and consultancies.

Accessories and Family Options

UTE-series test cables support safe three-phase connection. Pair the UTE323 with UNI-T programmable sources and electronic loads for a complete three-phase power-characterization bench.

Frequently Asked Questions

Can the UTE323 measure a full three-phase system at once?

Yes. Three synchronized channels and the 3P3W / 3P4W / 3V3A wiring modes measure a complete three-phase system in one instrument.

Can the three channels measure independent rails instead of one three-phase system?

Yes. The three channels can measure three independent DC/AC rails or converters simultaneously.

Does the UTE323G add GPIB on top of RS-232?

No — it substitutes GPIB for RS-232. USB and LAN are on both models; the UTE323G is for GPIB-bus racks.

Does each channel measure harmonics?

Yes — per-channel harmonic analysis to the 50th order.

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.