Fluke 709H Loop Calibrator Battery

This loop calibrator is a handheld instrument designed to source, simulate and measure 4–20 mA loops with HART communication capability for field commissioning, troubleshooting and routine maintenance. It combines a Compact form factor with a graphic backlit display and a simple rotary Quick-Set control to speed setup and operation in confined or poorly lit environments.

• Accuracy of 0.01% reading enables precise calibration and verification
• Resolution of 1 μA on current ranges supports fine adjustment tasks
• Built-in selectable 250 Ω resistor allows HART signal coupling
• 24V DC loop power at 20 mA permits Active loop testing
• Logging capacity of 9,800 records aids systematic fault analysis
• Operating range -10 °C to +55 °C supports varied industrial conditions

• Suitable for commissioning HART-enabled transmitters on process plants
• Ideal for loop tuning and in-situ transmitter trimming activities
• Used for field logging of current and HART device parameters
• Can be used for routine mA source and simulate checks in control cabinets
• Used with handheld diagnostic software to upload device configurations

It operates from batteries

The device can store up to 9,800 samples or 99 separate sessions with adjustable capture intervals from 1 s to 60 s.

It complies with EN 61326 for EMC, includes over‑voltage protection to 240 VAC and overload current protection around 28 mA DC.

The calibrator weighs 0.3 kg and features a rugged holster and Compact footprint for easy carrying and single‑hand operation.