Fluke 707 | Precision Loop Calibrator with Quick Adjustment & HART Mode

Repeated 4–20 mA calibration becomes inefficient when small output adjustments require multiple button presses. The Fluke 707 Loop Calibrator uses a rotary output-adjustment dial that supports fine 1 µA and 100 µA steps, allowing one-handed signal adjustment during field calibration.

The calibrator measures and sources current with 0.01% accuracy, while simultaneous mA and percentage-of-span display makes 4–20 mA interpretation faster. A built-in 24 V supply can power field transmitters during testing. HART mode inserts a 250 Ω resistor in series with the loop for compatibility with an external HART communicator. Push-button 25% stepping, Span Check and selectable slow or fast ramps support quick linearity and functional checks on process loops and control valves.

Precision Loop Calibrator Selection Guide

Choose the 707 when you want 0.01% mA accuracy, fine rotary adjustment and HART-compatible loop resistance. The 705 is a simpler, slightly lower-accuracy alternative.

Market Relevance

The Fluke 707 fits Pakistani instrumentation workshops, process plants, pharmaceuticals, water treatment and industrial automation teams. Kamadi Pakistan offers the Fluke 707 for precise 4–20 mA loop calibration and maintenance.

Key Features

• 0.01% mA accuracy
  
• One-handed rotary output adjustment
  
• 24 V loop power
  
• HART-compatible 250 Ω mode
  
• Span Check, step and ramp functions
  

Technical Specifications

• Model: Fluke 707
  
• Voltage Measurement: 0–28 V
  
• Voltage Accuracy: 0.01% reading + 2 LSD
  
• Current Measurement: 0–24 mA
  
• Current Resolution: 0.001 mA
  
• Current Accuracy: 0.01% reading + 2 LSD
  
• Current Source: 0–20 mA / 4–20 mA
  
• Source Drive: 1200 Ω at 24 mA
  
• Loop Supply: 24 V
  
• Battery Life: Approx. 18 hours
  

Applications

• 4–20 mA calibration
  
• Transmitter testing
  
• PLC/DCS input checks
  
• Valve functional testing
  
• HART loop preparation
  

Professional Tip: Use Span Check before performing a detailed calibration; a quick zero-and-span check often shows whether adjustment is actually necessary.