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POROMETISTO · Inrush Clamp Meter,CM06 Clamp Multimeter, 6000 Counts 600A, POROMETISTO | TRMS Amp Meter with VFD, LOZ, NCV, AC/DC Voltage Current,Continuity Capacitance Frequency Resistance Temperature
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The CM06 is the smallest and most feature-dense clamp meter on this site. It is the only one here that publishes an inrush measurement window (about 100 ms) and a VFD mode, which makes it the natural first pick for motor starting circuits and variable-speed drives. It is not the meter for high-current work: the listing gives 600 A AC/DC, well below the 2000 A of the Klein CL910. It is also not a power quality recorder; the ETCR8430 is the instrument for that job. Choose the CM06 when you need a general clamp meter that can also catch a startup surge.
The CM06 is the inrush meter of the group, and the listing says why
Inrush current is the short burst a motor, compressor or transformer draws when it first energises. It can be several times the running current, and it is the reason a breaker trips on start-up even though the steady load is well within rating. To see it, the meter has to sample fast enough to catch a surge that is over almost immediately. The CM06 listing states an inrush measurement time of about 100 ms and limits the function to AC. That is the only published inrush window among the clamp meters on this site. The Klein CL910 is described as an auto-ranging clamp meter with a worklight, and the listing does not publish an inrush capture time. The ETCR8430 is a three-phase power recorder, a different class of instrument aimed at logging rather than instantaneous capture.
For a technician chasing a tripped breaker on a refrigeration compressor or an air handler, that 100 ms window is the specification that decides whether the tool is useful. A general clamp meter shows you running current; it will not show you the spike. If the job is sizing a breaker or confirming that a soft starter is doing its job, the inrush function is the reason to pick the CM06 over a simpler clamp.
The limit is equally important: the listing says inrush applies to AC only. A DC motor start, or the inrush of a DC-side circuit, is outside what this function is stated to measure. Do not assume the DC current range extends the inrush feature to DC.
VFD and LoZ modes: two features that change what the reading means
A variable frequency drive (VFD) outputs a pulse-width modulated waveform, not a clean sine wave. A meter without a VFD mode can read the high-frequency switching component as part of the fundamental, giving a current or voltage figure that is higher or lower than the true value. The CM06 listing states a VFD function that reduces the interference of high-frequency information on measurement results. That is the mechanism: the meter filters or averages the switching noise so the displayed number reflects the drive output more closely. It does not make the meter a power quality analyser, and the listing does not publish a bandwidth or a accuracy figure for the VFD mode.
LoZ, or low impedance input, is the other mode worth understanding. A digital meter with a high input impedance can pick up stray voltage induced on a disconnected conductor, showing a phantom reading that looks like a live circuit. LoZ puts a lower impedance across the test leads, which loads the stray voltage down and gives a more honest answer about whether the conductor is actually energised. The CM06 listing states LoZ prevents erroneous readings caused by stray voltages. In practice this is the mode you use when a voltage detector says a circuit is live but you suspect it is pick-up from a parallel cable. It is a diagnostic aid, not a substitute for proving dead with a tested voltage indicator.
What the 600 A range and the 6000 counts actually cover
The title gives 600 A AC/DC and 6000 counts. The 600 A figure is the top of the current range. The 6000 counts is the display resolution: the meter can show a number with four significant digits across most ranges, which is why it can resolve small changes on a low-current reading. Neither figure is an accuracy specification. The listing does not publish a percentage accuracy for any function, and it does not publish a resolution per range. A buyer who needs to know how close a reading is to the true value will not find that here.
Compared with the Klein CL910, which is listed at 2000 A AC/DC, the CM06 is aimed at lower-current work: domestic distribution boards, HVAC units, automotive starting circuits and small industrial motors. The 600 A ceiling is generous for a domestic consumer unit and adequate for most single-phase HVAC compressors, but it will not cover a large three-phase service or a high-capacity feeder. If your work regularly involves currents above 600 A, the CM06 is the wrong instrument and the CL910’s higher range is the relevant difference.
The CM06 also measures 600 V AC/DC, capacitance, frequency, duty cycle, resistance, diode, continuity and temperature. That is a broad feature set for an entry-level clamp. The listing does not give a CAT rating, a safety standard, or a voltage accuracy, so the buyer should not infer a category rating from the feature list.
The features that are useful on a dark panel, and the ones the listing leaves out
The listing states a high-definition colour screen, a flashlight, data hold, max/min, auto and manual ranging, and a ZERO function. The flashlight and colour screen are practical on a dim distribution board or inside an air handling unit. Data hold freezes a reading you cannot see while the probes are in place; max/min records the highest and lowest values over a measurement window, which is useful for catching a load that varies. The ZERO function is a DC clamp feature: it nulls the residual offset so a low DC current reads closer to zero. The listing does not state how the ZERO function is invoked or whether it applies to both AC and DC.
The temperature function is stated to measure ambient temperature when the switch is turned to the temperature symbol, with a SEL button to switch between Celsius and Fahrenheit. The listing does not publish a temperature range or accuracy. That matters if you intend to use the meter for HVAC temperature work: a clamp meter with an unstated temperature accuracy is a convenience function, not a calibrated thermometer.
NCV is the non-contact voltage detector. The listing says it can quickly determine whether a voltage is present. It does not publish a voltage threshold or a distance. NCV is a screening tool: it tells you a conductor may be live, not that it is safe to touch. The listing does not claim a CAT rating, and the buyer should not treat NCV as a substitute for a proving unit and a tested voltage indicator.
Where the CM06 sits against the power recorder and the larger clamp
The three instruments on this site cover different jobs. The ETCR8430 is a three-phase power recorder with USB, aimed at logging power quality over time. It answers questions about harmonics, demand and phase balance. The CM06 answers instantaneous questions: what is this current now, what was the startup surge, is this conductor live. The Klein CL910 is a clamp meter with a 2000 A range and a worklight, aimed at higher-current work. The CM06 is the entry-level clamp with the inrush and VFD modes.
If you are choosing between the CM06 and the CL910, the decision is current range against inrush and VFD. The CL910’s listing does not publish an inrush capture time, and the CM06’s listing does. The CL910’s listing gives 2000 A; the CM06 gives 600 A. Neither listing publishes a CAT rating or an accuracy figure, so the safety and accuracy comparison cannot be made from the published data. A buyer who needs a documented CAT rating should look for a meter whose listing states one.
For a reader building a first electrical testing kit, the CM06 covers a lot of ground: current, voltage, resistance, continuity, capacitance, frequency, duty cycle, diode and temperature. The clamp meter buying guide sets out the range and jaw considerations, and the inrush clamp meter comparison places the CM06 alongside other inrush-capable tools. If your work is mainly automotive, the automotive multimeter guide explains why a clamp is sometimes the better choice for starter current.
The CM06 is the inrush pick, with published limits
The POROMETISTO CM06 is the clamp meter to choose on this site if you need to see motor starting current and you work below 600 A. The listing publishes the inrush window (about 100 ms, AC only) and the VFD and LoZ modes, which are the features that separate it from a plain clamp. It does not publish a CAT rating, an accuracy figure or a temperature range, so it is not the instrument for safety-critical verification or calibrated temperature work. If you need a higher current range, the Klein CL910 is the alternative. If you need to log power quality over time, the ETCR8430 is the right class of tool.
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Frequently Asked Questions
Does the CM06 measure DC inrush current?
The listing states the inrush measurement time is about 100 ms and that it is only applicable to AC. The DC current range is published, but the inrush function is not stated to work on DC. Treat DC motor starting current as outside what this function is documented to capture.
What is the CAT rating of the CM06?
Not stated in the listing bullets. The listing gives 600 V AC/DC and 600 A AC/DC but does not publish a CAT III or CAT IV rating or a safety standard. Do not infer a category rating from the voltage range.
Can the CM06 replace a power quality analyser?
No. The CM06 gives instantaneous readings and a VFD mode that reduces high-frequency interference, but the listing does not publish harmonics, logging or three-phase measurement. The ETCR8430 on this site is the three-phase power recorder for that work.
How accurate is the CM06?
The listing does not publish an accuracy figure for any function. It gives 6000 counts and 600 A AC/DC, which describe display resolution and range, not accuracy. A buyer who needs a stated accuracy should look for a meter whose listing includes one.
Is the temperature function suitable for HVAC work?
The listing states the meter measures ambient temperature when switched to the temperature symbol, with a SEL button for Celsius and Fahrenheit. It does not publish a temperature range or accuracy. That makes it a convenience reading, not a calibrated HVAC thermometer.
Does NCV make the CM06 safe for proving a circuit dead?
No. The listing says NCV determines whether a voltage is present. It does not publish a threshold or a CAT rating, and it is a screening function. Proving dead requires a tested voltage indicator, not a non-contact detector.
Affiliate disclosure: Akermin earns a commission from qualifying Amazon purchases made through links on this page. Our editorial picks are based on documented specifications and owner feedback, not commissions.
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