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  • Fully Class-A compliant: Conduct tests according to the stringent international IEC 61000-4-30 Class-A standard
  • GPS time synchronization: Correlate data with events or datasets from other instruments with precision
  • Flexible and fully configurable thresholds and scale factors: Allows user to pinpoint specific issues by defining the detailed criteria for detection and recording of disturbances.
  • Uninterrupted power supply (40 minutes): Never miss important events - even record the beginning and end of interruptions and outages to help determine the cause
  • 10 MHz, 6000 Vpk waveform capture: Get a detailed picture of even the shortest event
  • 2 GB data memory: Enables detailed, simultaneous recording of numerous power parameters for long periods of time
  • Comprehensive software included: Provides trend diagrams for root cause analysis, statistical summaries, report writing and real-time data monitoring in the online mode
  • Plug and play: Allows quick setup with automatic sensor detection; sensors are instrument powered, eliminating the need for batteries
  • Rugged field design: Insulated housing and a solid state design with no rotating components enable reliable testing under nearly any conditions


  • 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.


  • Two electrically isolated inputs
  • CAT III 1000 V / CAT IV 600 V safety rated
  • 60 MHz bandwidth model
  • 625 MS/s
  • Deep memory: 10,000 samples per channel waveform capture so you can zoom in on the details
  • Dedicated 5000 Count digital multimeter
  • Connect-and-View continuous auto-trigger, single shot, pulse width, and video triggering
  • ScopeRecord roll mode, capture waveform sample data for up to 48 hours
  • TrendPlot, trend measurement readings for up to 22 days
  • Advanced automatic measurements, power (Vpwm, VA, W, PF) and time (mAs, V/s, w/s)
  • IP-51 rated for dust and drip proof to withstand harsh environments
  • Isolated USB ports for memory devices and PC connectivity
  • Li-Ion battery for extended operating timespan: up to 4 hours (BP290 included standard) or up to 8 hour with optional BP291
  • Charge spare battery using optional external battery charger (EBC290)
  • Easy-access battery door to make it easy to swap batteries
  • A handy slot to tether and lock down the oscilloscope while unattended using a standard Kensington® lock


  • Precise laser technology for more accurate and repeatable measurements
    • Temperature accuracy of up to ± 1℃ or ± 1% of reading whichever is greater with 20:1 distance to spot ratio
  • Flashlight and large, easy-to-read backlit LCD display for easy viewing even in dark environment
  • IP54 rated for extra protection against airborne contaminants
  • Get your tool to work when you can't - set time and desired interval between measurements and Auto Capture will capture spot temperatures unattended
  • 99 data point logging
  • 30 hour battery life so your tool can perform as long as you need it to
  • Displays the minimum, maximum or average temperature, or the difference between two measurements
  • Hi and Lo alarms for rapid display of measurements outside set limits
  • Small and lightweight design fits easily into your tool box
  • Powered by one (1) AA alkaline battery


  • 1024 x 768 infrared camera with large 5.6-inch high resolution LCD screen
  • Provides temperature measurements from -40°C to +1200°C (-40°F to 2192°F)
  • Offers a high temperature option for measurements up to 2000 °C (3632 °F)
  • Subject to Export Control