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The UNI-T UT216B is a professional-grade, 6000-count true RMS digital clamp meter engineered for electricians, HVAC technicians, and industrial maintenance professionals who need to measure high-frequency currents with precision . As a key model in UNI-T's advanced UT216 series, this instrument is specifically designed for measuring currents up to 400Hz in demanding environments such as server rooms, IT systems, railways, and aerospace applications .
With its 30mm jaw opening and comprehensive measurement capabilities including AC current, AC/DC voltage, resistance, capacitance, and frequency, the UT216B delivers professional-grade performance in a compact, ergonomic package weighing just 231.7g . Its double-injection design provides a comfortable grip and enhanced durability for daily professional use .
6000-Count True RMS Display: High-resolution LCD with 38mm × 24mm display for precise readings. True RMS technology ensures accurate measurement of non-linear or distorted AC waveforms .
AC Current Measurement up to 600A: Measures AC current up to 600A with extended 40Hz to 400Hz frequency response—ideal for server rooms, IT systems, and industrial applications .
Wide Measurement Range: Measures AC voltage up to 750V, DC voltage up to 1000V, resistance up to 60MΩ, capacitance up to 60mF, and frequency up to 1MHz .
VFC (Variable Frequency Control) Mode: Built-in low-pass filter for accurate measurements on variable frequency drives (VFDs), inverters, and motor controls with变频干扰 .
NCV (Non-Contact Voltage) Detection: Safely identify live AC circuits via the sensor on the top of the clamp jaws with audio/visual alarm .
Built-in Flashlight: Integrated work light illuminates dark panels and confined spaces for easier measurement .
Comprehensive Testing: Includes diode test (around 3.0V), continuity test with acoustic indication (<30Ω), MAX/MIN recording, relative mode, and data hold .
User-Friendly Design: Auto-ranging, LCD backlight, flashlight, and auto power-off after approximately 15 minutes .
Rugged & Safe: Certified to CAT II 1000V / CAT III 600V safety standards with full-range overload protection and input impedance ≥10MΩ .
The UNI-T UT216B delivers professional-grade accuracy across an extensive range of electrical parameters.
| Item | Quantity |
|---|---|
| UNI-T UT216B Digital Clamp Meter | 1x |
| Test Leads | 1 pair |
| AAA Batteries (1.5V) | 3x |
| Carrying Pouch (Cloth Bag) | 1x |
| User Manual (English) | 1x |
| Warranty Card | 1x |
Note: Unlike the UT216C and UT216D models, the UT216B does not include a temperature probe .
The UT216 series offers four distinct models, with the UT216B positioned as the mid-range professional model offering VFC capability without temperature measurement:
Set the rotary switch to the appropriate current position .
Press the trigger to open the 30mm clamp jaws and fully enclose one conductor only .
The extended 40Hz-400Hz bandwidth ensures accurate measurements on motor drives, server room equipment, and power systems .
In AC voltage or current mode, activate VFC mode to enable the low-pass filter .
Blocks high-frequency interference and carrier signals from variable frequency drives .
Application: Enables accurate voltage and current measurements on variable frequency drives (VFDs), inverters, and motor controls where standard meters often give false or unstable readings .
Set the rotary switch to the NCV position .
Bring the sensor on the top of the clamp jaws near a live AC conductor .
The meter provides audio and visual alarm when AC voltage is detected .
Set the rotary switch to the V position .
Press SELECT to choose between DC and AC measurement .
Connect test leads in parallel to the circuit under test .
Input impedance is ≥10MΩ, minimizing circuit loading effects .
Set the rotary switch to the appropriate position for resistance, capacitance, or diode testing .
For resistance, connect test leads across the component (up to 60MΩ) .
For capacitance, fully discharge capacitors before testing and connect test leads in parallel (up to 60mF) .
For diode test, connect leads across the diode to measure forward voltage drop (around 3.0V open circuit) .
In AC voltage or current measurement mode, press the Hz button to enter frequency measurement mode .
Application: Signal analysis, PWM troubleshooting, and drive diagnostics.
Set the rotary switch to continuity mode .
Connect test leads across the circuit .
The buzzer sounds when resistance is <30Ω, confirming a complete circuit .
Press REL to set a reference value for comparative measurements .
Press HOLD to freeze the current reading on the display for convenient viewing .
Press the flashlight button to turn the built-in LED flashlight on/off—essential for working in dark panels and confined spaces .
The meter features a backlit LCD for clear readings in low-light conditions .
Auto power-off shuts down the meter after approximately 15 minutes of inactivity to conserve battery life .
The UT216B incorporates multiple advanced safety features to protect users:
CAT III 600V / CAT II 1000V Rating: Suitable for measurements on distribution circuits and permanently installed equipment .
Overload Protection: Comprehensive protection on all measurement ranges .
Input Impedance: ≥10MΩ minimizes circuit loading for accurate readings .
NCV Detection: Allows safe, non-contact verification of live circuits .
Low Battery Indication: Prevents false readings due to insufficient power (≤3.6V) .
The UNI-T UT216B is an ideal all-in-one tool for:
Specifically designed for measuring high-frequency currents (up to 400Hz) in server rooms and IT infrastructure .
Current measurement for power distribution units (PDUs) and UPS systems .
Non-contact voltage detection for safe troubleshooting .
Safe high-voltage measurements up to CAT III 600V .
VFC mode for accurate measurements on variable frequency drives and motor controls .
AC current measurement up to 600A for load monitoring .
Troubleshooting electrical panels and distribution systems .
Capacitance testing up to 60mF for power factor correction capacitors .
Frequency analysis up to 1MHz for drive signals .
Designed for measuring currents in railways and aerospace applications .
High-frequency current measurement capability (40Hz-400Hz) .
Measuring compressor and fan motor currents .
Testing capacitors for HVAC equipment .
Users consistently praise the UT216B for its excellent build quality, lightweight design, and VFC capability for motor drive work.
Lightweight & Compact: At just 231.7g, users appreciate the portability and ease of use compared to heavier industrial clamps .
VFC Mode: The inclusion of variable frequency control at this price point is frequently highlighted as exceptional value for VFD troubleshooting .
Build Quality: The double-injection design provides a comfortable grip and enhanced durability for daily professional use .
Flashlight: The built-in work light is praised for illuminating dark panels and server racks .
No DC Current: Unlike the UT216C and UT216D, the UT216B does not measure DC current .
No Temperature Measurement: Does not include temperature measurement capability (available on UT216C/UT216D) .
No Inrush Current: Lacks inrush current capture function (available on UT216D) .
Limited Jaw Opening: 30mm jaw opening may not accommodate very large industrial cables (consider UT200 series with 42mm+ jaws for heavy industrial applications) .
The UNI-T UT216B is the ideal choice for professionals who need extended frequency AC current measurement up to 400Hz combined with VFC capability for motor drive diagnostics—all in a lightweight, portable package. Its specific design for server rooms, IT systems, and high-frequency applications makes it uniquely suited for these environments .
While it lacks DC current, temperature measurement, and inrush capture (available in the UT216C/UT216D), the UT216B excels where it matters most: accurate, reliable AC current measurements on high-frequency systems with professional-grade diagnostic features.
Whether you're an IT professional monitoring server room power, an industrial electrician troubleshooting VFDs, or a facility manager maintaining commercial buildings, the UT216B delivers professional-grade performance with the safety features you can trust.
The UNI-T UT216B: Precision AC current measurement with VFC technology—the perfect choice for server rooms and industrial applications.
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