Overview

The UNI-T UTE9811+ is a compact single-phase digital power meter measuring 3V – 600V / 5mA – 20A to 1W – 12kW. It performs PLL-synchronized harmonic analysis to the 50th order with THD and crest-factor measurement — built for power-quality and distortion work.

It is built for bench and in-rack power measurement on power-supply, converter and appliance-energy work, with RS-232 and RS-485 for datalogging and integration into automated test.

Choosing Your Model — UTE9800+ Series

The UTE9800+ name covers three distinct compact power meters. Compare the full series before selecting:

The three UTE9800+ models are not a progression — each is a distinct instrument chosen by what you need to measure: mixed-mode true RMS (9802+), limit/alarm testing (9806+), or harmonic and distortion analysis (9811+).

For single-phase high-voltage bench measurement or three-phase work, see the UTE310 Series (600 V / 1000 V single-phase) and the UTE323 Series (3-channel three-phase) — distinct higher-tier instrument lines.

Key Features

• 50th-order harmonic analysis, PLL-synchronized
• THD and crest-factor (CF) measurement
• True power, V, A, W, PF and frequency
• 3V – 600V / 5mA – 20A measurement range, to 1W – 12kW
• Voltage resolution 0.01V; current resolution 1mA
• Measurement bandwidth 40Hz – 70Hz
• RS-232 and RS-485 for datalogging and ATE integration
• 4.3-inch LCD display

UNI-T UTE9811+ Details

50th-Order Harmonic Analysis, PLL-Synchronized

The UTE9811+ performs phase-locked-loop synchronized harmonic analysis to the 50th order, with total harmonic distortion (THD) and crest-factor measurement — the data set for power-quality and distortion assessment on non-linear loads.

RS-232 / RS-485 Communication

Both RS-232 and RS-485 are standard, with SCPI and Modbus support, for datalogging and integration into multi-drop production-line monitoring or an automated test framework.

Compact Bench / In-Rack Form Factor

The compact chassis fits a test bench or an instrument rack and leaves the front-panel reading clear for V, A, W, PF and frequency at a glance during a measurement run.

Applications

Power-Quality & Harmonic Work

PLL-synchronized 50th-order harmonic analysis with THD and crest factor quantifies distortion on rectifier and PFC front ends for power-quality assessment.

Pre-Compliance Distortion Screening

Bench harmonic and THD screening flags distortion problems early in design verification, before formal compliance testing.

Accessories and Family Options

UTE-series test cables and the UTE-M01-US North-American test fixture support safe connection to standard plug loads.

Frequently Asked Questions

How does the UTE9811+ differ from the other UTE9800+ models?

Each UTE9800+ model is a distinct instrument: the UTE9802+ adds AC/DC/AC+DC true-RMS modes, the UTE9806+ adds apparent power and limit alarms, and the UTE9811+ adds 50th-order harmonic analysis. They are chosen by measurement need, not as a tier progression.

Does it have a computer interface?

Yes — RS-232 and RS-485 with SCPI and Modbus support, for datalogging and automated test.

Is this a three-phase meter?

No. The UTE9800+ models are single-phase (1P2W). For three-phase measurement, see the UTE323 Series.

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.