.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 Rated CAT III 1000 V / CAT IV 600 V, the UT171B is a 60,000-count True-RMS multimeter built for plant and process work. The high count resolves small changes other meters round off, True-RMS keeps AC readings accurate on the distorted waveforms around drives and switching loads, and a high-contrast EBTN display stays readable on a plant floor. It covers DC voltage to ±(0.025%+5), AC and DC current to 10 A, resistance, capacitance, frequency to 10 MHz, and temperature to 1000 ℃, with non-contact voltage detection and storage for 9999 readings. A 7.4 V rechargeable Li-ion pack and 1 m drop rating suit daily field use. It's backed by UNI-T's nearly 40 years of test-meter manufacturing. Key Features 60,000-count resolution with high-contrast EBTN display True-RMS AC voltage and current DC voltage accuracy ±(0.025%+5); AC bandwidth to 100 kHz AC/DC current to 10 A; resistance to 60 MΩ, capacitance to 60 mF Frequency to 10 MHz; temperature −40 ℃ to 1000 ℃ Non-contact voltage (NCV) detection Low-impedance (LoZ) ACV mode to reject ghost voltages 9999-reading storage CAT III 1000 V / CAT IV 600 V; 1 m drop; rechargeable Li-ion UT171B Details 60,000-Count True-RMS Measurement The 60,000-count display resolves fine detail across the range, and True-RMS sensing keeps AC voltage and current accurate on the non-sinusoidal waveforms common around variable-frequency drives and electronic loads — where average-responding meters read low. Industrial Accuracy & Bandwidth DC voltage accuracy of ±(0.025%+5) and 100 kHz AC bandwidth cover precise troubleshooting and signal work, with resistance to 60 MΩ, capacitance to 60 mF, frequency to 10 MHz, and thermocouple temperature to 1000 ℃. Safe Measurement Features Non-contact voltage detection flags live conductors before you probe, and a low-impedance ACV mode loads out induced ghost voltages so a de-energized circuit reads as dead. The CAT III 1000 V / CAT IV 600 V rating covers distribution-level work. Field Build An EBTN display holds contrast at wide angles and in bright light, a 7.4 V 2000 mAh rechargeable pack runs long shifts, and a 1 m drop rating handles the knocks of plant use. Compare the UT171 Series UT171B UT171C Display EBTN OLED Square-wave output — Yes Non-contact voltage (NCV) Yes — Applications Plant and process troubleshooting; motor-drive and control-panel work where True-RMS and LoZ matter; commissioning and preventive maintenance; and bench or field measurement that needs 60,000-count resolution. Frequently Asked Questions What does 60,000-count resolution give me? Finer reading detail than a typical 6,000-count meter — small changes that would otherwise be rounded off stay visible. Is the UT171B True-RMS? Yes — AC voltage and current are True-RMS, accurate on distorted waveforms around drives and electronic loads. How does the UT171B differ from the UT171C? The UT171B uses an EBTN display and includes NCV; the UT171C uses an OLED display and adds a square-wave output. Core measurement performance is the same. Specifications DC Voltage 1000 V, ±(0.025% + 5) AC Voltage 1000 V, ±(0.4% + 40) DC Current 10 A, ±(0.15% + 10) AC Current 10 A, ±(0.75% + 20) Resistance 60 MΩ, ±(0.05% + 2) Admittance 60 nS, ±(1% + 10) Capacitance 60 mF, ±(2.5% + 5) Frequency 10 Hz to 10 MHz, ±(0.01% + 5) Temperature -40 ℃ to 1000 ℃, ±(1% + 3) Display Count 60000 Display Type EBTN True RMS Yes AC Bandwidth 100 kHz LoZ (ACV) Around 3 kΩ Input Impedance (DCV) ≥10 MΩ Data Storage 9999 readings NCV Yes Power 7.4 V 2000 mAh Li-ion (rechargeable) Safety Rating CAT III 1000 V, CAT IV 600 V Drop Protection 1m Dimensions (W × H × D) 206 × 95 × 55 mm Weight 384 g Documentation UT171B Datasheet UT171B User Manual UT171B Programming Manual
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