Precision HART Loop Calibrator
Fluke puts HART communication in a precision loop calibrator.
The Fluke 709 and 709H mA loop calibrators are designed to save time and produce high-quality results. These calibrators are built around a user friendly interface with a Quick-Set rotary encoder knob. This tool reduces the time it takes to measure, or source, current and power up a loop. The protective holster easily ts into a technician’s hand and the large backlit display is easy to read, even in dark, cramped worked areas.
The 709H adds HART communications and supports a select set of the HART universal and common practice commands. This makes the 709H unique as both an affordable, compact loop calibrator and powerful HART communication troubleshooting tool.
In the communicator mode the user will be able to read basic device information, perform diagnostic tests, and trim the mA output on most HART enabled transmitters. In the past, this could only be done with a dedicated communicator, a high-end multifunction calibrator, or a laptop computer with HART modem. Fluke 709H will allow virtually any technician to service and support HART devices.
Saving time, getting answers
In addition, the 709H offers:
Logging of HART data in the field. Once recorded by the 709H in the field, the 709H/TRACK software can upload the HART configuration of up to (20) HART devices in your plant and output data in either (.csv) or (.txt) format.
Data logged mA loop measurements and HART data can be recorded from a particular transmitter for troubleshooting and loop tuning. The data log feature offers selectable capture with recording intervals of 1 to 60 seconds and a logging capacity of 9800 records or 99 individual sessions. Each data sample contains the 709H mA measurement, all four process variables, and the standard status conditions.
We are considering a model 709H. What does "HART" stand for?
HART is a digital communications signal riding on top of a 4-20 mA signal, short for Highway Addressable Remote Transmitter. It was developed by Emerson Process/Rosemount and later made public, so now all major instrument manufacturers support the standard. You may see other protocols, but HART is the king in process instrumentation. Smart pressure transmitters, temperature transmitters, flowmeters, and other instruments with HART capability give access to anyone with a HART communicator to basic to advanced configuration parameters. Setting up ranges, units of measure, tag labels, input filter/dampening, square root extraction of differential flow measurement devices like orifice plates are all possible remotely from anywhere on the 4-20 mA loop. Hazardous area transmitters become much less expensive because keypads or alternate interfaces suitable for use in explosive atmospheres are not needed.