Overview

The UNI-T UT8806E Performance-Series Bench Digital Multimeter is a 6½-digit auto-ranging True-RMS meter with 0.0035% basic DC voltage accuracy, a 10,000 rdgs/s maximum reading rate, and a 1,999,999-count display on a 4.3in 480×272 TFT-LCD. SCPI over LAN, RS-232, and USB; 32 Gb NAND Flash for setup and measurement file storage; and the full math, dual-display, and trend-analysis workflow of the Performance cohort.

For metrology-tier bench measurement, calibration support, and high-resolution R&D characterization where reading rate and accuracy matter simultaneously, the UT8806E is the flagship of the UT8800E series. Thermocouple and RTD temperature measurement, four-wire resistance to 1 GΩ, and a VXI-11 / USBTMC / IEEE-488.2-style SCPI command set are standard.

Key Features

UNI-T UT8806E Details

6½-Digit Display and 0.0035% Accuracy

The UT8806E delivers a 6½-digit 1,999,999-count display with 0.0035% basic DC voltage accuracy. DC voltage resolution reaches 0.1μV and DC current resolution reaches 1pA — meeting the spec floor required for low-signal R&D measurement, transducer-output characterization, and reference-source verification. Resistance measurement resolution is 10μΩ.

× 1,999,999-count 6½-digit resolution

Measurement Function Coverage

Measurement coverage includes AC/DC voltage, AC/DC current, resistance, four-wire resistance, capacitance, diode, continuity, frequency, duty cycle, temperature (thermocouple), period. Capacitance measurement extends to 100 mF. Frequency counter range is 3 Hz – 1 MHz.

True-RMS AC Measurement

True-RMS AC measurement delivers correct readings on distorted, non-sinusoidal waveforms — switching-mode power supply outputs, motor-drive currents, dimmed lighting loads, PWM signals — where an average-responding meter would read low. AC voltage and AC current measurements are both True-RMS.

Dual Display

Dual display shows two parameters at once — voltage with frequency, current with frequency, or any compatible primary/secondary pairing — without menu toggling. For diagnostics on AC sources, switching supplies, and motor drives, the primary measurement and its frequency update in real time alongside each other.

× Dual display showing two parameters simultaneously

Trend Graph and Four Display Modes

Four display modes present the same measurement data four ways: Number, Bar Graph, Trend Graph, and Histogram. Trend Graph mode is particularly useful when 32 Gb NAND Flash is logging a long-duration test in the background and you want a real-time visual on the data stream.

× Trend graph mode for time-series measurement analysis

Data Logging and 32 Gb NAND Flash Storage

The UT8806E stores measurement data, instrument setups, and SCPI logs to 32 Gb NAND Flash. Files export via USB drive, transfer over LAN, or stream programmatically to the controlling computer via VXI-11 or USBTMC. This makes the UT8806E a self-contained logger when network connectivity isn't available, and a long-duration data-acquisition node when it is.

× 32 Gb NAND Flash for large-volume measurement and setup file storage

10,000 rdgs/s Maximum Reading Rate

Maximum reading rate is 10,000 rdgs/s on the UT8806E — the highest in the UT8800E series. For SCPI-driven automated test sequences, this reduces loop time at every measurement step. For high-resolution characterization, the same reading rate supports oversampling and averaging for noise reduction without slowing overall test throughput.

Math, Statistics, and Pass/Fail

Built-in math includes max/min/average tracking, standard deviation, relative measurement (REL), dB and dBm operations, and configurable limits. Pass/Fail comparison automatically flags out-of-tolerance readings and sounds an alarm. All math operations apply across voltage, current, resistance, capacitance, frequency, and temperature.

Four-Wire Resistance

Four-wire (Kelvin) resistance measurement eliminates lead and contact resistance from low-resistance readings. For shunt resistors, motor windings, contactor coils, PCB-trace resistance, and any measurement below approximately 100 Ω where lead resistance distorts the result, the four-wire path delivers the accuracy the digit count promises.

Temperature Measurement

Temperature measurement supports thermocouple sensors over the range -270°C to 1820°C with 0.5°C accuracy, plus RTD (thermal-resistance) sensor input for higher-accuracy laboratory measurements. A built-in cold-end compensator is standard, so external reference junctions are not required.

Connectivity and Remote Control

Four host interfaces: LAN, RS-232, USB-Host, and USB-Device. LAN supports VXI-11 for SCPI-over-Ethernet; USB-Device supports USBTMC; RS-232 supports established automated-test scripts and embedded controllers that don't have an Ethernet path. USB-Host accepts a USB flash drive for file import/export. SCPI command set is IEEE-488.2-style and compatible with the mainstream multimeter command set, easing migration from existing test code.

SCPI Command Set and Automation

The UT8806E accepts SCPI commands compatible with the mainstream multimeter command set, easing migration from existing test scripts. Configuration and triggering via SCPI is supported across all measurement functions. Firmware updates are free over the product's lifetime; license unlocks for any future optional features have no expiration. Measurement results return as ASCII or numeric blocks per SCPI conventions.

Applications

R&D Measurement and Characterization

• High-resolution DC voltage and current measurement on bench power rails, sensor outputs, and reference circuits.
• Component characterization across voltage, resistance, capacitance, and temperature within a single bench session.
• Long-term drift studies with timestamped recording to internal storage and post-test export over USB or LAN.
• Four-wire resistance measurement of low-value shunts, PCB traces, and contact resistance.

Production Test and Automated Quality Control

• SCPI-driven automated test sequences with reading rates that keep loop times short on multi-DUT lines.
• Pass/Fail comparison automatically flagging out-of-tolerance units with audible alarm.
• Incoming-inspection batch testing with statistical summary reporting (max, min, average, standard deviation).
• Integration into existing rack-and-stack production environments via LAN (VXI-11) or USB (USBTMC).

Calibration and Metrology Support

• Verification of bench instruments against reference standards using the meter's high resolution and accuracy.
• Periodic in-house verification of secondary standards between formal calibration cycles.
• RTD- and thermocouple-based thermal characterization with cold-end compensation built in.
• Long-duration logging of environmental and reference-source drift for trend analysis.

Specifications

Accessories and Family Options

Included with Every Unit

• UT8806E benchtop digital multimeter
• Standard test lead set
• AC power cord (region-appropriate)
• USB-Device cable for PC connection
• PC software (included; downloadable from uni-trend.com)
• User manual and factory calibration certificate

Recommended Accessories

• Four-wire test lead set — Kelvin-style test leads for low-resistance measurement accuracy.
• Type-K thermocouple probe — for temperature measurement across the supported range.
• Standard 19-inch rack mount kit — for rack-integration in production-test and ATE installations.

Family Members

• UT8802E — Value-tier 4½-digit manual-range bench DMM.
• UT8803E — Classic-tier 3⅚-digit auto-ranging bench DMM with inductance and D/Q.
• UT8804E — Advanced-tier 4⅚-digit bench DMM with data recording and Pass/Fail.
• UT8805E — Performance-tier 5½-digit SCPI bench DMM with four-wire resistance and math.
• UT8806E — Performance-tier 6½-digit SCPI bench DMM (LAN/RS-232/USB). (this product)
• UT8806EG — GPIB variant of this model. Identical measurement specifications; IEEE-488.2 GPIB replaces RS-232. Choose if your test environment is built around the GPIB bus.

Frequently Asked Questions