Overview

The UNI-T UT8806EG is the GPIB variant of the UT8806E 6½-digit bench digital multimeter, with IEEE-488.2 GPIB substituting for the UT8806E's RS-232 port. All other specifications match the UT8806E: 0.0035% basic DC voltage accuracy, 10,000 rdgs/s maximum reading rate, 1,999,999-count display, True-RMS, four-wire resistance to 1 GΩ, dual display, and 32 Gb NAND Flash measurement storage.

For test environments standardized on the IEEE-488.2 GPIB bus — calibration labs running established automated procedures, multi-instrument production racks, and university teaching labs with existing GPIB-controller infrastructure — the UT8806EG slots directly into a GPIB chain without a USB-to-GPIB adapter in the path. RS-232 is not present on this variant; if both bus types are required on a single instrument, the UT8806E (with RS-232) is the corresponding choice.

Key Features

UNI-T UT8806EG Details

6½-Digit Display and 0.0035% Accuracy

The UT8806EG 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.

IEEE-488.2 GPIB Bus (Substitutes for RS-232)

The UT8806EG carries an IEEE-488.2 GPIB port in place of the UT8806E's RS-232 port. All other specifications and measurement capabilities are identical to the UT8806E.

The GPIB variant exists for one reason: test environments standardized on the IEEE-488.2 bus. Calibration labs running long-standing automated-procedure scripts, multi-instrument production racks with established GPIB controller infrastructure, and university teaching labs with existing GPIB equipment all benefit from a DMM that drops onto the bus without a USB-to-GPIB adapter in the data path. The UT8806EG slots directly into an existing GPIB chain at addresses 1–30 (configurable on the front panel) and responds to standard IEEE-488.2 common commands plus the SCPI multimeter command set.

If your environment requires both GPIB and RS-232 on a single instrument, this is not a configuration option for the UT8800E series — choose the UT8806E for RS-232 or the UT8806EG for GPIB based on your bus architecture. Both share LAN, USB-Host, and USB-Device, so SCPI-over-Ethernet and USBTMC are always available regardless of which variant you select.

× UT8806EG 6½-digit bench DMM with IEEE-488.2 GPIB

Dual Display

Dual display shows two parameters at once — voltage with frequency, current with frequency, or any compatible primary/secondary pairing — without menu toggling. Combined with the UT8806EG's 6½-digit resolution, dual display lets a single measurement step capture two related parameters of a device under test, useful in GPIB-driven calibration and characterization scripts.

× Dual display showing two parameters simultaneously

Data Logging and 32 Gb NAND Flash Storage

The UT8806EG stores measurement data, instrument setups, and SCPI logs to 32 Gb NAND Flash. Files export via USB drive, transfer over LAN, or fetch programmatically over GPIB or USBTMC. This makes the UT8806EG a self-contained logger when the GPIB controller polls summary statistics rather than streaming raw samples, and a high-throughput acquisition node when streaming is required.

× 32 Gb NAND Flash mass storage for SCPI test logs and instrument setups

10,000 rdgs/s Maximum Reading Rate

Maximum reading rate is 10,000 rdgs/s on the UT8806EG — identical to the UT8806E. For GPIB-controlled automated test sequences, this reduces loop time at every measurement step. The 32 Gb NAND Flash plus high reading rate together enable long-duration acquisition campaigns where the GPIB controller polls aggregated statistics rather than streaming every sample.

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. All math operations apply across voltage, current, resistance, capacitance, frequency, and temperature, and all are addressable over GPIB.

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: IEEE-488.2 GPIB, LAN, USB-Host, and USB-Device. GPIB connects the UT8806EG directly to any IEEE-488.2-compliant bus-controller card and to multi-instrument GPIB racks without an intermediate adapter. LAN supports VXI-11 for SCPI-over-Ethernet; USB-Device supports USBTMC. USB-Host accepts a USB flash drive for file import/export of measurement data and instrument setups. Note: RS-232 is not present on this variant — see the UT8806E for the RS-232 configuration.

SCPI Command Set and Automation

The UT8806EG 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

Calibration Lab and Production Test Automation

• Drop-in DMM on an existing GPIB controller bus running long-standing automated procedures.
• Multi-instrument production-line racks where every instrument shares the GPIB bus to a single controller.
• Automated calibration procedures inherited from established test scripts that address instruments by GPIB primary address.
• Long-duration measurement campaigns logging to internal 32 Gb NAND Flash while the controller polls summary statistics over GPIB.

R&D Measurement and Characterization

• High-resolution measurement of low-level signals, reference outputs, and precision shunt voltages.
• Long-term drift studies with timestamped data captured to internal Flash and pulled over GPIB or LAN.
• Four-wire resistance measurement of contact resistance, motor windings, and low-value calibration shunts.
• Temperature-coefficient testing with thermocouple/RTD input and dual-display tracking of measured value and reference temperature.

University Teaching Labs with GPIB Infrastructure

• Instrument-control coursework using LabVIEW, MATLAB Instrument Control Toolbox, or pyvisa over GPIB.
• Curriculum modules teaching IEEE-488.2 common commands and SCPI command structure on real bench hardware.
• Multi-bench classroom installations where every station shares a teacher-side GPIB controller.
• Capstone measurement projects requiring high-resolution acquisition and automated data capture.

Accessories and Family Options

Included with Every Unit

• UT8806EG 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 — RS-232 variant of this model. Identical measurement specifications; RS-232 in place of GPIB. Choose if you need RS-232 for established automated-test scripts or embedded controllers.
• UT8806EG — Performance-tier 6½-digit bench DMM with IEEE-488.2 GPIB (substitutes for RS-232). (this product)

Frequently Asked Questions

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.