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Yellow Fluke 709H loop calibrator with LCD display

Fluke

Fluke 709H HART Loop Calibrator measurement tool

SKU CH-JZGC-KJC1Z

Sources and measures 0–20 mA DC loops with HART, 0.01 % accuracy, 24 V supply and NIST certificate

  • TypeElectronic
  • HART communication support simplifies smart-transmitter setup
  • Source and measure 0–20 mA DC loops with 0.01 % accuracy
  • Built-in 24 V DC loop supply powers devices directly
  • Measures up to 30 V DC for voltage verification
  • NIST-traceable calibration certificate with data included

Fluke 709H Loop Calibrator

The Fluke 709H is a handheld loop calibrator designed for technicians who maintain 4-20 mA current loops in process plants. It sources current up to 20 mA DC and measures up to 24 mA DC. It also reads voltage to 30 V DC. The tool includes HART communication support for smart transmitter configuration.

Sustained accuracy with NIST calibration

Current accuracy is specified at 0.01 percent plus or minus two counts across the full range. Voltage accuracy matches the same 0.01 percent plus or minus two counts specification. The unit meets EN61326 standards for electromagnetic compatibility. A NIST-traceable calibration certificate with data ships with each instrument.

Simple battery power and common install issues

The calibrator runs on six AAA batteries, so no external supply is needed in the field. The LCD display shows readings clearly in typical ambient light. Users sometimes forget to enable the internal 24 V loop supply when powering a two-wire transmitter. Others exceed the 20 mA maximum loop current and trip the protection circuit.

Highlights

  • HART communication support simplifies smart-transmitter setup
  • Source and measure 0–20 mA DC loops with 0.01 % accuracy
  • Built-in 24 V DC loop supply powers devices directly
  • Measures up to 30 V DC for voltage verification
  • NIST-traceable calibration certificate with data included

Specifications

BrandFLUKE
TypeElectronic

Questions about this item

How much heat or noise does the Fluke 709H produce when running all day on its six AAA batteries?

The calibrator draws a maximum of 20 mA from its internal 24 V loop supply, so it generates very little heat and has no fan, making it effectively silent during continuous use.

What must I already own to power and connect the 709H for HART loop calibration?

You need six AAA batteries for power and test leads to access the 0–24 mA current and 0–30 V DC measurement terminals.

Will the 709H work with my older 4–20 mA transmitters that lack HART?

Yes, it sources and measures 0–20 mA DC with 0.01 % accuracy, so it can calibrate conventional analogue loops as well as HART-enabled devices.

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