Fluke 709H Loop Calibrator Battery

Fluke Loop Calibrator, ±0.01% Accuracy, 1 μA Resolution - Fluke-709H

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.

Features & Benefits

• 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

**Applications**

• 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

What power options does it use in the field?

It operates from batteries
a rechargeable lithium‑ion option is specified and alkaline cells are supported for extended use.

How much data can be recorded during a troubleshooting session?

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

Which standards and protections are included?

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

How portable is the instrument for site work?

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