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Extech EX655 True RMS 600A AC/DC Clamp Meter + NCV


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The Extech EX655 features True RMS providing accurate readings when measuring distorted or noisy waveforms and Low Impedance (LoZ) mode to eliminate false readings caused by ghost voltages. The Extech EX655 also features Low pass filter (LPF) which attenuates high frequencies to reduce noise for accurate readings and Inrush mode to capture current surges during motor startup.


PDF    Extech EX655/EX650 User Manual

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Extech EX655 Features:

  • EX655 True RMS 600A AC/DC Clamp Meter + NCV
  • 12 Functions including AC/DC Current
  • CAT III 600V Safety Rating
  • Frequency and Type K Temperature
  • Low Pass Filter (LPF) for accurate measurement of variable frequency drive signals
  • Inrush mode captures current surges during  motor startup
  • DC ZERO mode
  • LCD trending bargraph
  • Complete with test leads, general purpose bead wire Temperature probe and 3 AAA batteries
  • True RMS for accurate AC measurements
  • 30mm jaw size accommodates conductors up to 350MCM
  • LoZ prevents false readings caused by ghost voltages
  • µA function for HVAC flame rod Current measurements
  • Built-in Non-contact AC Voltage Detector (NCV) with LED indicator
  • 6000 count backlit LCD display
  • Data Hold freezes the reading on the display
  • Min/Max captures highest and lowest readings
  • Relative function
  • Convenient LED worklight for viewing in dimly lit area
  • Auto Power Off conserves battery life
Model EX655 Range (Max Resolution)
AC Current 60A, 600A (0.01A)
DC Current 60A ,600A (0.01A)
Basic accuracy ACA: ±2.5% of rdg
DCA: ±2.5% of rdg
AC/DC µA Current 600µA (0.1µA)
DC Voltage 1000V (0.1mV)
AC Voltage 750V (1mV)
Basic accuracy ACV: ±1.2% of rdg
DCV: ±0.8% of rdg
Non-Contact Voltage (NCV) 100 to 1000V
Resistance 60MΩ (0.1Ω)
Capacitance 60mF (0.01nF)
Frequency 10Hz to 1MHz (0.01Hz)
Temperature -40 to 1000°C (1°C)
Continuity/Diode Test Yes
Dimensions 228 x 77 x 41mm
Weight 265g



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