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The UNI-T UT61B+ is a professional-grade, 6000-count true RMS digital multimeter representing the next generation of the popular UT61 series . Designed for electricians, electronics engineers, HVAC technicians, and serious hobbyists, this meter combines high-precision measurement capabilities with robust safety features and USB connectivity for data analysis .
As the modern successor to the original UT61B model, the UT61B+ delivers significant upgrades including True RMS accuracy, a larger 6000-count display with analog bar graph, and enhanced safety certifications of CAT III 1000V / CAT IV 600V . Built with a rugged, impact-resistant casing, it is engineered to withstand the rigors of daily professional use while providing accurate measurements across a comprehensive range of electrical parameters .
6000-Count True RMS Display: High-resolution backlit LCD with 31-segment analog bar graph for precise readings and trend observation .
Wide Measurement Range: Measures DC/AC voltage up to 1000V, DC/AC current up to 10A, resistance up to 60MΩ, and capacitance up to 60mF .
Comprehensive Functionality: Includes temperature measurement (-40°C to 1000°C), frequency up to 10MHz, duty cycle (0.1%-99.9%), diode test, continuity test, and transistor hFE test .
Non-Contact Voltage (NCV) Detection: Safely identify live AC circuits with audio and visual alarms .
USB PC Connectivity: Built-in USB interface allows connection to a computer for data logging and analysis (cable included) .
Advanced Safety Features: Full-range overload protection with audible and visible alarms for high voltage/current and temperature warnings .
User-Friendly Interface: Auto/manual ranging, data hold, MAX/MIN recording, relative (REL) mode, and auto power off .
Durable Construction: Impact-resistant casing with protective holster for reliable field use .
High Safety Rating: Certified to CAT III 1000V / CAT IV 600V safety standards .
The UNI-T UT61B+ delivers professional-grade accuracy across an extensive range of electrical and environmental parameters .
The meter defaults to DC; press the function button to switch between DC and AC measurement .
Connect test leads in parallel to the circuit under test.
High-voltage alarm provides audible and visual warnings when measuring above 990V .
Set the rotary switch to the appropriate μA, mA, or A position .
Use the SEL button to choose between DC and AC current.
Connect the test leads in series with the circuit under test.
High current overheating alarm triggers when input exceeds safe levels .
Set the rotary switch to the **Ω/))) ** position.
For resistance, connect test leads across the component (up to 60MΩ) .
For continuity, press SEL to select the continuity test. The buzzer sounds when resistance is low, confirming a complete circuit .
For diode test, connect leads across the diode to measure forward voltage drop .
Connect a K-type thermocouple (optional accessory) to the meter, observing correct polarity.
Measure temperature from -40°C to 1000°C for HVAC, appliance repair, and industrial applications .
Fully discharge capacitors before testing to avoid damage to the meter.
Connect test leads in parallel with the capacitor.
Measures up to 60mF for motor start capacitors and power supply filtering .
Connect test leads to the signal source.
Measure frequencies up to 10MHz and duty cycles from 0.1% to 99.9% .
Bring the top of the meter near a live conductor.
The meter provides audio and visual alarms to indicate the presence of an AC electric field, enhancing safety .
Insert the transistor into the dedicated test socket, matching the correct pinout (E, B, C).
Read the transistor's DC current gain (β) directly from the display .
Connect the included USB cable to transfer measurement data to a computer .
Ideal for data logging, analysis, and documentation in professional and educational settings .
MAX/MIN: Record and display the highest and lowest readings during a measurement period .
REL Mode: Zero out test lead resistance or set a reference value for comparative measurements .
Auto Power Off: Conserves battery life by shutting down after 15 minutes of inactivity .
The UT61B+ incorporates multiple advanced safety features to protect users :
CAT III 1000V / CAT IV 600V Rating: Suitable for measurements on distribution circuits and primary power supplies.
Full-Range Overload Protection: Comprehensive protection on all measurement ranges.
Audible and Visible Alarms: Provides warnings when measuring high voltage/current and temperature.
High Current Overheating Alarm: Triggers when input current exceeds safe levels.
Input Protection: High-energy fuse protection on current ranges.
Double-Insulated Housing: Rugged casing with protective holster for impact resistance.
The UT61+ series offers distinct models, with the UT61B+ serving as a versatile mid-range option with comprehensive features :
The UNI-T UT61B+ is an ideal all-in-one tool for:
HVAC/R Technicians: Measuring temperature, testing capacitors up to 60mF, and troubleshooting control boards .
Industrial & Commercial Electricians: Safe high-voltage measurements up to CAT IV 600V, verifying wiring, and diagnosing motor drives with frequency analysis .
Electronics Engineers & Technicians: Precision component testing, transistor matching, frequency analysis, and detailed circuit diagnostics .
Automotive Diagnostics: Testing battery voltage, alternator output, sensor frequency, and parasitic drain .
Educational & R&D Labs: A robust and accurate meter for teaching and conducting experiments with USB data logging capability .
DIY & Home Workshop: General electrical troubleshooting, outlet testing, and appliance repair .
Users consistently praise the UT61B+ for its excellent build quality, accuracy, and comprehensive feature set. Verified buyers describe it as a "solidly built" meter with "accurate readings" and "fast continuity response" . The USB connectivity is frequently highlighted as a valuable feature for data logging and analysis . Some users note that the NCV sensitivity could be improved, but overall, the meter delivers exceptional value for its price point .
The UNI-T UT61B+ is a powerful, professional-grade multimeter that delivers exceptional value for users who need True RMS accuracy, temperature measurement, USB connectivity, and comprehensive functionality in a single package. Its high-resolution 6000-count display, robust safety certifications (CAT III 1000V/CAT IV 600V), and durable construction make it an outstanding choice for HVAC technicians, electricians, electronics engineers, and serious enthusiasts
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