Field Instruments

Product Overview

The Fluke 771 Milliamp Process Clamp Meter is a versatile and reliable tool designed for troubleshooting and validating analog 4–20 mA process control loops without breaking the circuit. It provides accurate clamp-on mA measurement along with mA source and simulation functions, making it ideal for commissioning, calibration, and maintenance of transmitters, PLC/DCS I/O modules, control valves, and other process instrumentation.

With built-in 24 V loop power, simultaneous source and measurement capability, and easy-to-read display, the Fluke 771 simplifies complex process testing in industrial environments—saving time and reducing the risk of process interruption.

Key Features

• Clamp-On 4–20 mA Measurement – Measure process current without interrupting the loop
• mA Source & Simulation – Test and diagnose analog process loops
• Simultaneous Source & Measure – Source a signal while monitoring loop output
• 24 V Loop Power – Power transmitters and field instruments directly
• Wide mA Range – Up to 24 mA with high accuracy
• Ramp & 25% Step Output – Automatic waveform generation for system testing
• Large Backlit Display – Clear, easy-to-read measurement results
• Rugged Industrial Design – Built for field use in process environments
• Auto Power-Off & Backlight Timeout – Conserves battery life

Technical Specifications

Manufacturer: Fluke
Model: 771
Type: Milliamp Process Clamp Meter

Measurement & Source Functions

mA Measurement (Clamp Jaw)
• Range: 0 – 20.99 mA
• Extended Range: 21.0 – 100.0 mA
• Accuracy:
– 0–20.99 mA: ±(0.2 % + 5 counts)
– 21–100 mA: ±(1 % + 5 counts)

mA Source & Simulation
• Range: 0 – 24.00 mA
• Accuracy: ±(0.2 % + 2 counts)
• Max Drive: 24 mA into 1000 Ω

Voltage Measurement
• Loop Power: 24 V DC output for testing transmitters and sensors

Function Outputs
• Ramp Output – Gradual mA change for system response tests
• 25% Step Output – Quick check of control responses

Display & Construction

• Large digital LCD with backlight
• Compact ergonomic clamp design
• High immunity to external magnetic fields (< 0.12 mA)
• IP40 protection rating
• Designed for harsh industrial and process environments

Power Supply

• 4 × AA alkaline batteries
• Typical Operating Time: ~12 hours (varies with source output)
• Auto power-off to save battery life

Environmental Specifications

• Operating Temperature: –10 °C to +50 °C
• Storage Temperature: –25 °C to +60 °C
• Operating Altitude: up to 2000 m

Applications

• 4–20 mA loop troubleshooting
• Transmitter commissioning & calibration
• PLC / DCS analog I/O testing
• Control valve and actuator signal verification
• Preventive and corrective maintenance
• Industrial process systems: water treatment, power plant, oil & gas, chemical plants

Why Buy from FieldInstruments.lk?

• 100% genuine Fluke instruments
• Competitive pricing with fast island-wide delivery
• Trusted supplier for professional process and electrical test tools
• Expert local technical support and after-sales service

Fieldinstruments.lk
50/3, Angampitiya Rd, Ethul Kotte, Sri Lanka. 10100.
Phone: +94718555888 Email: info@fieldinstruments.lk