.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 UT622E is the top of the UT622 line: a professional-grade handheld LCR meter that measures to 100 kHz and adds DC resistance (DCR) from 0.01 mΩ to 20 MΩ — so the same instrument characterizes a component's AC behaviour and its DC resistance, which matters for windings, contacts, and low-value parts. It measures L, C, R, Z, ESR, and D/Q at 0.1% basic accuracy. With a 4-wire Kelvin connection, open/short correction, series/parallel modelling, and tolerance sorting, the UT622E suits power-electronics design and lab work, on a portable Li-polymer-powered platform. Key Features Adds DC resistance (DCR) measurement: 0.01 mΩ to 20 MΩ Test frequencies to 100 kHz: 100 Hz, 120 Hz, 1 kHz, 10 kHz, 100 kHz Measures L, C, R, Z, ESR, and D/Q with 0.1% basic accuracy 4-wire Kelvin connection with open/short correction Series and parallel equivalent-circuit modelling Tolerance sorting from 1% to 20%; up to 20 readings/s 500-group data logging over USB 2.8-inch TFT display; ~8 h rechargeable Li-polymer UT622E Details AC and DC Resistance Together Beyond the full AC LCR set, the UT622E measures DC resistance from 0.01 mΩ to 20 MΩ. Reading DCR alongside impedance and ESR characterizes windings, contacts, and low-value components more completely than an AC-only meter — a meaningful step for power-electronics work. 4-Wire Kelvin Measurement A 4-wire Kelvin connection separates the drive and sense paths so lead and contact resistance don't corrupt the reading — essential for low-impedance components where milliohm-level errors matter. Open and short correction nulls fixture and lead effects before a measurement run. Full Parameter Set Beyond L, C, and R, the meter reads impedance (Z), equivalent series resistance (ESR), dissipation factor (D), and quality factor (Q), with series or parallel equivalent-circuit modelling and impedance phase from −179.9° to 179.9° — the parameters needed to characterize a part, not just read its nominal value. Sorting & Logging A tolerance-comparison function sorts parts pass/fail from 1% to 20% bands at up to 20 measurements per second, suited to incoming inspection and small-batch QC. Results log to 500 groups and transfer over USB. Portable Build A 2.8-inch color display and a rechargeable Li-polymer pack good for about 8 hours make the UT622E a capable bench and lab instrument that travels. Compare the UT622 Series UT622A UT622C UT622E Max test frequency 10 kHz 100 kHz 100 kHz DC resistance (DCR) — — 0.01 mΩ – 20 MΩ Kelvin test leads — Included Included Applications Power-electronics component design and verification; characterization needing both AC parameters and DC resistance; lab and R&D measurement; and production QC with tolerance sorting. Frequently Asked Questions What does the UT622E add over the UT622C? DC resistance (DCR) measurement from 0.01 mΩ to 20 MΩ, alongside the same 100 kHz AC LCR capability. Why measure DCR as well as ESR? DCR characterizes windings, contacts, and low-value parts at DC, complementing the AC parameters for a fuller picture. What is its basic accuracy? 0.1% basic accuracy across the LCR measurement set. Specifications Frequency 100 Hz, 120 Hz, 1 kHz, 10 kHz, 100 kHz Capacitance 0.00 pF to 99.999 mF Inductance 0.00 µH to 99.999 H Impedance 0.0000 Ω to 9.9999 MΩ ESR Range 0.0000 Ω to 999.99 Ω Max Resistance 20 MΩ (DCR: 0.01 mΩ to 20.000 MΩ) Accuracy 0.10% D/Q Range D: 0.0000 to 9.9999; Q: 0.0000 to 99999 Impedance Phase Range -179.9° to 179.9° Test Signal Level 0.1 Vrms, 0.3 Vrms, 1 Vrms Output Impedance 100 Ω Tolerance Range 1% to 20% Equivalent Circuit Series, Parallel Auto Ranging Yes Auto LCR Yes Open Short Correction Yes Test Method 4-Wire Kelvin Data Logging Yes Fastest Test Rate 20 times/s Interface Mini-USB Data Storage 500 groups Display Size 2.8in Display Type TFT LCD Display Resolution 320×240 Battery 3.7 V 1800 mAh Li-polymer Battery Life 8 hours Ambient Temperature Range 0 °C to 40 °C Weight 420 g Dimensions 93 × 192 × 44 mm Documentation UT622E Datasheet UT622E User Manual
