1
Introduction
The Fluke 709 Precision Loop Calibrator and 709H
Precision HART Loop Calibrator (the Product or the
Calibrator) can be used for installation, calibration, and
troubleshooting of field transmitters, valves, and other
control system components at process plants. Primary
functions are source and measure mA signals in the 0 mA
to 24 mA range. The Product can also produce 24 V dc loop
power.
The 709H includes HART communication functionality and
supports a select set of HART universal and common-
practice commands. The Product can be used as a loop
calibrator or basic function communicator.
Product functions include:
• Current measurement, sourcing, and a selectable 24 V
supply
• 30 V dc measurement
• Valve test capability
• A selectable HART 250 Ω loop resistor
• Output step and ramp