.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 UT181A is a 60,000-count True-RMS multimeter built around recording and reviewing measurements over time. It logs readings, captures trend graphs on its own display, and pairs to a Bluetooth app — so an intermittent fault or a slow drift you'd miss with spot readings shows up as a curve. It's rated CAT III 1000 V / CAT IV 600 V. Measurement covers AC/DC voltage and current to 1000 V and 10 A, combined AC+DC, resistance to 60 MΩ, capacitance to 60 mF, frequency, temperature to 1000 ℃, plus a low-pass filter, dBV/dBm, conductance, duty cycle, and peak hold. A 1 m drop rating keeps it field-ready. It's backed by UNI-T's nearly 40 years of test-meter manufacturing. Key Features 60,000-count True-RMS measurement On-board data logging with trend-graph capture Bluetooth app for live readout and transfer AC+DC combined measurement; AC/DC to 1000 V and 10 A Resistance to 60 MΩ, capacitance to 60 mF, frequency, temperature to 1000 ℃ Low-pass filter for drive output; dBV/dBm; conductance; duty cycle Relative, max/min, peak hold, and data-comparison modes USB interface; CAT III 1000 V / CAT IV 600 V; 1 m drop UT181A Details Logging & Trend Capture The UT181A records readings over time and plots them as a trend on its own graphing display, so intermittent faults and slow drift become visible patterns instead of numbers you have to watch. Logged data transfers by USB or the Bluetooth app for analysis and reports. 60,000-Count True-RMS Measurement High-resolution True-RMS sensing keeps AC accurate on distorted waveforms, and combined AC+DC measurement reads complex signals that pure AC or DC modes miss. Drive & Signal Tools A low-pass filter strips high-frequency content so you read the fundamental on a drive output, while dBV/dBm, conductance, and duty cycle cover signal and component work. Analysis Modes & Field Build Relative, max/min, peak hold, and data-comparison modes support careful measurement, and a 1 m drop rating with CAT III 1000 V / CAT IV 600 V safety keeps it ready for the field. Applications Intermittent-fault hunting where logging beats spot readings; commissioning and acceptance testing that needs a measurement record; drive and signal troubleshooting; and any task where trend capture and data transfer support documentation. Frequently Asked Questions What makes the UT181A a datalogging meter? It records readings over time, plots them as trend graphs on its display, and transfers the data by USB or Bluetooth for analysis. Can it measure AC and DC together? Yes — it has a combined AC+DC mode in addition to separate AC and DC measurement. Does it connect to a phone or PC? Yes — over a Bluetooth app and a USB interface. Specifications DC Voltage In 1000 V AC Voltage In 1000 V DC Current In 10 A AC Current In 10 A AC DC Combined Yes Frequency 60 MHz Capacitance 60 mF Max Resistance 60 MΩ Thermocouple Range 1000 °C True RMS Yes Low Pass Filter Yes dBV dBm Yes Conductance Yes Continuity Yes Duty Cycle Yes Auto Ranging Yes Data Logging Yes Relative Mode Yes Max Min Yes Peak Hold Yes Data Comparison Yes Trend Capture Yes Interface USB-Device Bluetooth App Yes CAT Rating CAT III 1000 V , CAT IV 600 V Drop Rating 1m Documentation UT181A Datasheet UT181A User Manual UT181A Programming Manual
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