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Digital & Vector Signal Analyzers, Signal Generators and Fast Synthesizers, Spectrum


  • Large display
  • Backlight for work in dim areas
  • Min / Max to record signal fluctuations
  • Ergonomic overmolded housing with integrated probe holders
  • Free your hands with the optional TPAK magnetic hanger
  • Auto and Manual ranging
  • Meets Measurement Category 1000 V CAT III and Category IV 600 V safety standards
The 77 IV replaces the 77. Move up to superior utility and safety today.


  • Reliably handle a wide range of high-current applications with 2000 A AC + DC true-rms, 1400 A ac, and 2000 A DC
  • The large 58 mm (2.3 in) jaw capacity is suitable for large or multiple conductors
  • CAT IV 600 V, CAT III 1000 V rating for added user protection
  • In-rush current measurement captures ‘power-on’ surge current with accuracy and repeatability
  • Accurately measure frequency up to 1 kHz for optimum troubleshooting
  • Quickly analyze readings using the MIN, MAX, and AVG functions
  • A large backlit display allows for easy visibility in low-lit areas
  • Use the display hold feature to capture readings even when the display cannot be viewed
  • Use the low-pass filter to smooth out noisy loads and stabilize readings


Fluke CLKT Infrared Windows are Available in Three Sizes 50 mm (2 in), 75 mm (3 in) and 100 mm (4 in)

Each CLKT infrared window is engineered and tested to withstand electric-arcs up to 50 kA for 30 cycles.

The ClirVu® coating - exclusive to Fluke infrared windows - seals the optic prior to assembly to protect against moisture degradation making it perfect for very hot and very cold outdoor environments.

Each Fluke infrared window is delivered with an identification plate attached for unique, on-site numbering for rapid location confirmation and faster repairs.

CLKT infrared windows come complete with a security access key, installation instructions and self-adhesive drilling template.

For 5 minute or less installation and Autoground consider the CV300.


  • Guided testing with graphical step-by-step voltage and current connection diagrams makes setup and connection to variable frequency drives easier than ever
  • Preset measurement profiles collect data based on the chosen test procedure and reduce the need for complex configuration
  • Built-in report writing capabilities make it easy to produce professional as-found and as-left motor-drive troubleshooting reports


  • Extremely accurate infrared thermometer for measuring temperatures from -30°C to 650°C (-22°F to 1202°F) accurate to +1.0°C or +1.0% of reading (whichever is greater)
  • Offers precise dual-lasers for superior targeting and more accurate and repeatable measurements
  • Provides up to a 12:1 Distance to spot ratio
  • Features IP54 rating against dust and moisture