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The clamp meter can be used to measure AC DC current/voltage, resistance, capacitance, diode, continuity,frequency, temperature. lt also includes functions like NCV, Live. MAX/MIN, HOLD, INRUSH, VFD, flashlight, backlight, automatic shutdown, full-range overload protection, low battery indication.
AUTO-V LOZ Function
Turn the rotary switch to the AUTO-V LOZ position. The meter will enter low-impedance voltage auto-identification mode. In this mode, no manual conversion is required—the meter will automatically detect whether the measured voltage is AC or DC based on the input signal.
ZERO Function
To ensure the accuracy measurement. press the ZERO button in DC current mode to clear the base number caused by electromagnetic interference in the use environment. After zeroing, keep the same direction for measurement.
Correct Measurement
Only a single wire should be placed in the clamp for measurement and placing two or more wires simultaneously will result in incorrect readings. ensure the load is active during measurement.
Jaw Design
The jaws of the clamp meter can be opend up to 30mm (1.12 inch) suittable for various wire measurements, easily measure current, voltage.
Variable-frequency Measurement
Start VFDin AC voltage and current mode to effectively reduce high-frequency interference on measurement results.
Accurate Temp Measurement
Features a high-precision K-type thermocouple probe for fast, reliable temperature readings (-40°C to 1000°C / -40°F to 1832°F)
Large LCD wirh Backlight
The LCD Backlit Screen and Flashlight make it easy to use in a dark working area.
HOLD Function
"HOLD"can “freeze” the readings so you can record them. If you need to write down the readings for later use, a hold button is indispensable.
A USEFUL TROUBLESHOOTING TOOL
L
Reviewed in the United States on May 2, 2025
I picked up the MESTEK clamp meter for both home and job site electrical work, and it’s honestly one of the most versatile tools in my kit. It punches way above its price point with a bunch of pro-level features packed in.It handles accurate measurements even with messy, non-sinusoidal waveforms essential if you’re working around VFDs or noisy circuits. A game changer for checking motors and compressors. It gives a fast, reliable reading of peak startup amps without needing a separate tool. Super handy for quick checks, just hover near a wire or outlet and the meter lets you know if there’s voltage present. Saves time and improves accuracy when jumping between different measurements. Low impedance (LowZ) helps eliminate ghost voltage, a huge plus when diagnosing open circuits or floating wires.It measures AC/DC current and voltage, resistance, capacitance, continuity, diode test, and even temperature. The thermocouple probe included is surprisingly accurate for HVAC tasks. It filters out the noise to give stable readings on motor drive circuits which is essential for techs working with automation or industrial panels.Feels solid in hand, not too bulky, not too light. The clamp jaw opens wide enough for thick cables. The display is large and easy to read, even in dim lighting. The backlight and flashlight features come in handy in tight panels.Whether you’re an electrician, HVAC tech, or just a DIYer who wants more than a basic multimeter, this digital clamp meter brings serious capability. Inrush, VFD, LowZ, and NCV in one tool? That’s a rare combo at this price. Definitely recommended
Paul Bouchier
Reviewed in the United States on April 30, 2025
The Mestek DVM has lots of measurement modes, including a clip-on ammeter which is surprisingly useful. All the measurements are auto-ranging.Basic measurementsAC & DC volts and resistance are expected and DC volts worked fine when I tested against my bench supply. It also has a mode where it automatically determines if the voltage is AC or DC and reports appropriately. The clip-on ammeter can measure AC or DC current - I tested DC current and it matched my bench supply. Resistance measurement worked as expected, and continuity test beeped when the leads were shorted.Advanced measurements- Diode: in diode-test mode it displays OL for reverse polarity and the diode forward voltage drop for forward conduction (red lead is positive). This helps identify the diode type. The forward voltage drop was a bit lower than normally given in a data sheet: a schottky diode showed 0.25V and a silicon diode 0.6V and an LED 1.0V.- Capacitance: it measured a 1000uF cap and a 150pF cap within tolerance.- Frequency: It reports frequency and duty-cycle. I tested on a servo and it reported 50Hz, 5%, which is about right- Temperature: if there's no thermocouple connected it reports ambient temp, or it reports the thermocouple-sensed temperature. I tested on a swamp cooler and the reading was believable.- NCV vs. Live: In NCV (Non-Contact Voltage sensing) mode you hold the end of the ammeter clip against a wire or outlet and it displays H or L and beeps fast or slow depending on whether it senses a high or low voltage. In Live mode you touch the red lead to a wire and it beeps and displays "Live" if it's hot.Utility features- The manual is excellent! Well written and clear.- The ammeter clamp has a clip that holds a probe, so you don't need 3 hands to hold 2 probes and the meter. See my picture.- There's a flashlight/hold button that holds the last measurement, or toggles the flashlight on a long press- It times out and turns itself off after 15 minutes (with a beep beforehand). You can disable that feature.All in all, and excellent meter and I highly recommend it. I'd give it 6 stars if I could.
Habby Gal
Reviewed in the United States on April 23, 2025
I do a lot of posting on (mainly) car-related forums, and am constantly telling people to go out and buy a multi-meter. This will (hopefully) prevent them from throwing money at the wrong problem (like swapping out a starter when the problem is the alternator).But I also recommend meters like this one for the hard-core enthusiast, because it has a feature that is very hard to find, namely a built-in clamp-on DC ammeter (measures current when clamped around a single (important) wire carrying DC current. Finding a clamp-on ammeter that does AC current is much easier (and of course, this one does that as well). But when you find yourself wondering why that car battery is going dead overnight, you can clamp this meter's sensing clamp around the battery lead (positive or negative) and you'll know just how much current is flowing.I like the fact the manufacturer included a "zero" function, because my previous meter that had this feature would often report current where there was none, and didn't have this convenient way to eliminate any spurious readings.The meter is clearly well-constructed, and the switch feel and action is as good as any meter I've ever used at any price. It's smaller than I expected (which is a feature, not a problem), and is going to be stored in my (tiny) car so I am not flying blind if I do have some sort of electrical malfunction far from home.It's got plenty of modes that add even more value - I like the non-contact AC voltage sensing, which allows you to check if an outlet, power cord, or appliance is powered up (or not). That can save a bunch of time if you're chasing down a problem with your house wiring, or just to make sure that the outlet that non-functioning blender is plugged into is working (or not). Add in capacitance, in-rush current, and it's just icing on the cake.And I really like the simple, intuitive switch layout and operation of this meter. It's much more intuitive than my other "clamp meter", and I suspect it'll soon become my go-to meter for a lot of things. About the only thing it doesn't have is the ability to remote to an app on my phone, which is amazing, but not really necessary 99% of the time.
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