AC Circuit Analyzer


AC Circuit Analyzer

The #CA10 is ideal for identifying 110VAC power circuit and wiring problems that can cause overheating, short circuits, fires, equipment failures and poor equipment performance. It can also check the performance of ground fault circuit interrupter (GFCI) outlets and residual current devices (RCDs).


Best For:



  • Measures a branch circuit’s line voltage, peak voltage and neutral-to-ground voltage
  • Calculates a circuit’s voltage drop in response to 12A, 15A and 20A loads
  • Measures the impedance of hot, neutral and ground conductors as well as available short-circuit current (ASCC)
  • Identifies wiring configurations and detects wiring faults and missing ground wires
  • Tests the reliability and response time of GFCI outlets and RCDs
  • Displays True RMS readings of all voltages except peak voltages
  • Works with 2- and 3-phase circuits
  • Jumbo LCD with 30-second backlight
  • Familiar menu/sub-menu operation
  • Data HOLD button
  • Auto power off
  • Tripod mount


  • Line voltage measurement range/accuracy/resolution: 85 to 185VAC/±(1.0%+ 0.2V)/0.1V
  • Peak voltage measurement range/accuracy/resolution: 121 to 262VAC/±(1.0%+ 0.2V)/0.1V
  • Line frequency measurement range/accuracy/resolution: 45 to 65 Hz/±(1.0%+ 0.2Hz)/0.1Hz
  • Voltage drop measurement range/accuracy/resolution: 0.1 to 99.9%/±(2.5%+0.2%)/0.1%
  • Load voltage measurement range/accuracy/resolution: 10 to 185V/±(2.5%+0.2V)/0.1V
  • Neutral-to-earth voltage measurement range/accuracy/resolution: 0 to 10VAC/±(2.5%+0.2V)/0.1V
  • Hot, neutral and ground line impedance measurement range/accuracy/resolution: 0 to 3Ω/±(2.5%+0.02Ω)/0.01Ω
  • RCD triggering time measurement range/accuracy/resolution: 1ms to 6.5 seconds/±(1.0% +2ms)/1ms
  • RCD triggering current measurement range/accuracy/resolution: 30 to 37mA/±(1.0% +0.2mA)/0.1mA
  • GFCI triggering time measurement range/accuracy/resolution: 1ms to 6.5 seconds/±(1.0% +2ms)/1ms
  • LCD size: 2.4 in. diagonal
  • Auto power off: After 30 minutes of inactivity
  • Operating temperature: 32° to 122°F (0° to 50°C) @ <80% RH
  • Weight (without batteries): 10.4 oz. (295g)
  • Power source: Six "AAA" batteries (included)


  • 18 AWG, 6 ft. (1.83m) long test cable
  • Batteries
  • Soft pouch
  • 3-year limited warranty


  • 7.6 x 3.1 x 1.5 in. (193 x 78 x 39mm)