HART Mode Verification
29
HART Mode Verification
The following test verifies the ability of the Fluke 744 to communicate over a serial
HART
®
(Highway Addressable Remote Transducer) interface to a HART transmitter.
The calibrator communicates with virtually all HART transmitters and related software
versions. These are “supported transmitters”. All other transmitters are “generic”. This
procedure requires a Smart (HART) Pressure Transmitter. The Rosemount Models 1151
or 3051 are recommended (may be substituted with any HART communicator protocol
device).
This verification test is a pass or fail test. The HART mode requires no calibration. If the
calibrator fails this test repair is required. Refer to the 744 HART Mode Users Guide for
additional information on the HART feature.
It is not necessary to open the case or adjust the calibrator to perform this test. Simply
make the required connections and determine if the calibrator responds properly.
1.
Connect the 744 to the HART transmitter as shown in Figure 15.
2.
Press
to activate HART mode. If required, press the appropriate blue soft key
to enable Loop Power.
3.
The calibrator will recognize and identify the HART transmitter. When used with a
Model 3051, the display will appear as follows:
gb20s.bmp
The Active Device screen provides the following information for all HART
transmitters, supported or generic:
•
Poll address (if not 0)
•
Model number and Tag ID
•
PV (Primary Variable)
•
PVAO (digital representation of the Analog Output)
•
PV LRV (PV Lower Range Value)
•
PV URV (PV Upper Range Value)
•
Softkeys for accessing HART operation menus
Summary of Contents for 74X Series
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