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Fieldpiece ACH4 400A Amp Clamp Accessory Head

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Original price $67.00
Current price $56.95
Currently 1 in stock.

Fieldpiece ACH4 400A Amp Clamp Accessory Head

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Measure AC Amps up to 400A.



Measure AC Amps up to 400A.


  • Jaw claw helps isolate wires for testing
  • Find run/start amps of motors and compressors
  • Great partner for stick multimeters

The ACH4 current clamp is a small size accessory head for quickly reading up to 400 AC amps. The claw feature on the clamp makes it easy to quickly pick out the wire you need to measure. Once the current carrying conductor is isolated, the amperage is converted to mVAC for reading directly on the meter. The ACH4 works with the Fieldpiece “Stick” meter, EHDL1 Electronic Handle, EH4W Wireless Handle, DL3 Data Logger, the HG2 and HG3 HVAC Guide® System Analyzers, or any other digital multimeter (with mVAC range) connected by Fieldpiece ADLS2 detachable silicone leads or AHDL1 handle adapter. 



  • Connect directly to any Fieldpiece stick meter (shown attached to HS36)
  • Remote the amp clamp for hard to reach areas using our deluxe silicone leads with detachable probe tips (model ADLS2)
  • Angled jaw opens to 1.8 inches and makes singling out a wire fast and easy



  • Current range: 1AAC to 400AAC rms
  • Conversion rate: 1AAC to 1mVAC
  • Frequency: 50Hz to 60Hz
  • Operating temperature: 32°F to 122°F
  • Storage temperature: -4°F to 140°F
  • Temperature coefficient: 0.1 x (specified accuracy) per °F. (32°F to 64°F, 82°F to 122°F).
  • Altitude: 6561.7 Feet (2000m).
  • Resolution: 0.1A
  • Accuracy: ±(1.5%rdg + 0.2A), 1 to 20AAC;
    ±(2.5%rdg + 0.3A), 20 to 100AAC;
    ±(3.5%rdg + 0.5A), 100 to 400AAC
  • Maximum conductor diameter: 1.18 in. (30mm)
  • Safety: Designed to meet IE C61010-1 (EN61010- 1) and IEC61010-2-032 (EN61010-2-032), 300V, class 2 and pollution degree II indoor use comply with CE

What's Included

  • 400A Amp Clamp Accessory – ACH4
  • Operator’s Manual


User Manual