.ut-cat{color:#333;font-family:Arial,Helvetica,sans-serif;line-height:1.5;} .ut-cat h4{color:#1a1a1a;font-size:1.15em;margin:1.5em 0 .5em;padding-bottom:.25em;border-bottom:2px solid #ccc;} .ut-cat h2{color:#1a1a1a;font-size:1.25em;margin:1.2em 0 .4em;} .ut-cat h3{color:#222;font-size:1.05em;margin:1em 0 .3em;} .ut-cat p{margin:.6em 0;} .ut-cat ul{margin:.5em 0;padding-left:1.4em;}.ut-cat li{margin:.25em 0;} .ut-cat img{max-width:100%;height:auto;} .ut-cat table{border-collapse:collapse;width:100%;margin:.5em 0;} .ut-cat th,.ut-cat td{border:1px solid #ddd;padding:6px 10px;text-align:left;vertical-align:top;} .ut-cat td strong{color:#222;} 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: Model Channels Wiring Modes Communication UTE323 3 1P2W / 1P3W / 3P3W / 3P4W / 3V3A USB / LAN / RS-232 UTE323G 3 1P2W / 1P3W / 3P3W / 3P4W / 3V3A USB / LAN / GPIB 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 UTE323 multi-parameter measurement display Three-Phase & Multi-Rail Wiring Modes The UTE323 supports every standard configuration — single-phase two/three-wire, three-phase three/four-wire and the 3V3A method. One instrument measures a complete three-phase inverter output, a three-rail DC bus or three independent converters without re-cabling between standards. ×UTE323 multi-parameter measurement display Synchronous 300 kSa/s Multi-Channel Sampling All three channels sample synchronously at 300 kSa/s, so phase relationships and per-phase power are measured against a common time base — essential for true three-phase power and imbalance measurement. 300 kSa/s synchronous sampling on all channels ×300 kSa/s synchronous sampling on all channels DC to 300 kHz wide-bandwidth measurement DC to 300 kHz Wide-Bandwidth Measurement The wide DC–300 kHz bandwidth keeps switching content and harmonics in the per-phase power calculation, so three-phase inverter and drive measurements reflect the real waveform rather than the fundamental alone. ×DC to 300 kHz wide-bandwidth measurement Per-Channel Harmonic Analysis Harmonic analysis to the 50th order runs on each channel independently, quantifying per-phase distortion on three-phase rectifier and drive front ends. Harmonic analysis to the 50th order, per channel ×Harmonic analysis to the 50th order, per channel Energy integration (Wh / Ah) per channel Per-Channel Energy Integration Watt-hour and amp-hour integration accumulate per channel for three-phase efficiency runs and long-duration multi-rail energy profiling. ×Energy integration (Wh / Ah) per channel Simultaneous Waveform Display The 5-inch display shows all channel waveforms together, confirming phase rotation and wiring before the measurement is trusted. Simultaneous waveform display across channels ×Simultaneous waveform display across channels D/A analog output for external recording D/A Output A D/A analog output drives a chart recorder or DAQ for long-term trend logging of any measured channel. ×D/A analog output for external recording 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. Specifications Model Number UTE323 / UTE323G Channels 3 (synchronous) Voltage range 75mV – 600V Current range 2.5mA – 20A Power range 7.5W – 12kW Voltage resolution 1mV Current resolution 10µA Sample rate 300kSa/s Bandwidth DC, 0.1Hz – 300kHz Wiring modes 1P2W / 1P3W / 3P3W / 3P4W / 3V3A Harmonic analysis 1st – 50th Display 5-inch TFT-LCD Interface (UTE323) USB / LAN / RS-232 Interface (UTE323G) USB / LAN / GPIB Documentation UTE323 Datasheet, User Manual, and Software/Firmware Downloads Options & Accessories Included in box: Power cord UT-L0110-BB x3 UT-L0110-BU x3 Red/Black termals x6
