Fluke 709H Precision HART Loop Calibrator

The Fluke 709H Precision HART Loop Calibrator is designed for technicians who need accurate loop calibration and essential HART communication in one compact, affordable instrument. Built around an intuitive Quick-Set rotary encoder, the 709H allows fast setup, precise control, and efficient troubleshooting of 4–20 mA loops and HART-enabled transmitters.

Unlike traditional HART communicators or high-end multifunction calibrators, the Fluke 709H delivers practical HART diagnostics in a rugged handheld form—making advanced device support accessible to virtually any technician.

Features and Performance

• HART Communication Capability – Read device info, run diagnostics, and trim mA output

• Best-in-Class Accuracy – 0.01% reading accuracy for precise loop calibration

• Built-In 250 Ω HART Resistor – No external resistor required

• 24 V DC Loop Power – Power transmitters directly in mA measure mode

• Quick-Set Rotary Encoder – Fast and intuitive output adjustment

• mA Measure, Source & Simulate – Full loop calibration capability

• Valve Test Function – Simulate defined mA values using percent keys

• Auto Step & Ramp – Adjustable stepping and ramping for loop testing

• Large Backlit Display – Easy viewing in dark or confined spaces

• Rugged Protective Holster – Comfortable grip and field durability

HART Data Logging & Software Support

The Fluke 709H supports field logging of HART data and mA loop measurements, enabling advanced troubleshooting and loop tuning.

• Log HART configurations for up to 20 devices

• Selectable logging intervals from 1 to 60 seconds

• Up to 9,800 records or 99 sessions

• Each record includes mA measurement, four HART process variables, and status conditions

• Export data via 709H/TRACK software in CSV or TXT format

Why You Should Buy It

The Fluke 709H is the ideal solution for technicians who need precision loop calibration plus essential HART diagnostics without the cost or complexity of a full HART communicator. Its accuracy, portability, and built-in loop power make it a practical everyday tool for commissioning, maintenance, and troubleshooting.

FAQ – Fluke 709H Precision HART Loop Calibrator

Q: Does the Fluke 709H support HART communication?
Yes. It supports a select set of HART universal and common practice commands.

Q: Can it power a transmitter?
Yes. It provides 24 V DC loop power in mA measure mode.

Q: Is an external HART resistor required?
No. A selectable built-in 250 Ω resistor is included.

Q: Can it log data in the field?
Yes. The 709H logs mA and HART data with export capability via PC software.