Precision Loop Calibrator
HART Device Communication
23
HART Device Communication
The HART functions are only available in the 709H.
Auto shutdown is disabled when the HART menus are
used. Auto shutdown is restored to its previous state
when you exit the HART menus.
Note
Loop current trim is supported for transmitter
devices, but is not supported for actuator
devices.
These functions can be disabled with the HART Write
Enable selection on the Product:
• write LRV
• write URV
• device diagnostic
• trim 4 mA
• trim 20 mA
• fixed output
PV zero functions can be disabled with the HART Write
Enable selection on the Calibrator Setup menu. See the
“Calibrator Setup Menu” section of this manual. If these
functions are necessary, they must be enabled before
you enter the HART menus.
HART Connections
See the subsequent sections for HART connections.