CM88 PRO
AC/DC TRMS 1000A clamp meter,VFD and INRUSH(1000A) Function
MESTEK CM88 PRO True RMS clamp meter offers measurement up to 1000V DC, 750V AC, and 1000A AC/DC current.Its advanced VFD and INRUSH functions provide stable variable frequency testing. It can also detect inrush current up to 1000A, which is vital for motors, compressors, and other high-load devices.
CM88 PRO clamp meter includes a ZERO function for precise DC current, a LoZ AC voltage mode that removes stray voltages, and a 10MHz frequency range for versatile applications.
Its full-color LCD display improves visibility and makes readings clear in any environment.
Extra features include NCV non-contact detection, live wire identification, MAX/MIN hold, K-type temperature probe (-20°C to 1000°C), continuity/diode testing, flashlight, backlight, and auto shut-off.
Functions
| Maximum display value | 6000 Counts |
| DC Voltage | 1000V |
| AC Voltage | 750V |
| AC/DC Current | 1000A |
| Automatic range | Yes |
| Resistance | 60MΩ |
| Capacitance | 60mF |
| Data Hold | MAX and MIN data |
| NCV | Non-contact AC Voltage Detection. |
| LIVE | Live wire identification |
| K-type probe Temperature test | °C/°F: -20°C~1000°C/-4°F~1832°F |
| VFD and INRUSH Function | Variable frequency measurement,INRUSH (1000A) |
| ZERO function | Clear the low number of the DC |
| Frequency Hz% | 10MHz |
| Continuity/Diode Test | √ |
| Flashlight for Dark Area. | √ |
| MAX value locking | √ |
| AUTO-V LoZ AC voltage | √ |
| Screen | Color LCD |
| Over-range display | OL or-OL |
| Sampling time | About 3 times/second |
| Automatic shutdown time | About 15 minutes |
| Backlight automatic off time | About 3 minutes |
| Flashlight automatic off time | About 5 minutes |
| Power Supply | 2*1.5V AAA batteries |
| Working temperature | 0C~50C |
| Storage temperature | -10C~60C |
| Size | 218*75*39(mm) |
| Jaw size | 30mm |
| Weight | About 240g (excluding battery) |
Factory Showcase
Mestek achieves high standards and high consistency in product inspection and calibration through precise machinery and a clean environment.
FREQUENTLY ASKED QUESTIONS
What's the difference between a clamp meter and a multimeter?
A clamp meter is specialized for current measurement through its jaws, especially high amperage. A multimeter offers broader functions like voltage, resistance, and continuity testing, but typically measures current via test leads.For a more detailed comparison, please refer to the blog:clamp electric meter vs multimeter.
Can a clamp meter measure both AC and DC current?
Yes, many modern clamp meters can measure both AC and DC current. Be sure to check if the model specifically supports DC current, as not all do.
How do I measure current with a clamp meter?
To measure current, first set your clamp meter to the correct current mode—AC or DC. Then open the clamp jaws and place them around a single live conductor, not the entire cable, as clamping around both live and neutral wires will cancel out the current reading. Make sure the wire is centered in the clamp for better accuracy. Once clamped, the current value will appear on the display. For DC current measurements, some models require you to zero the meter before use to ensure accuracy.
What is the maximum current a clamp meter can measure?
It depends on the model. Entry-level clamp meters typically measure up to 400A–600A, while industrial models can go up to 1000A or more.
What is non-contact voltage (NCV) detection in a clamp meter?
NCV detection is a safety feature that lets you detect the presence of AC voltage without physically touching a wire. The clamp meter senses the electromagnetic field emitted by a live wire and alerts you with a visual or audible signal. It’s a fast and convenient way to identify live wires or check for voltage in outlets, switches, and breaker panels. However, NCV only indicates the presence of voltage—it doesn’t tell you the exact voltage level, so it should be used as a preliminary safety check rather than a precise measurement.
How accurate is a clamp meter?
Clamp meter accuracy varies by model and technology. Most standard models offer ±2% to ±3% accuracy, while high-end True RMS meters can reach ±1%. Accuracy may be affected by wire position, interference, or temperature. For best results, follow the manufacturer’s usage and calibration guidelines.
