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Precision Loop Calibrator
HART Device Communication
17
Before the setting is changed, a password is required. The
password is set to 617 at the factory. The range of values that can
be set is 000 to 999. See Figure 19.
The write-enable selection is saved only when the correct
password is given. Otherwise an error message shows.
Push the selection knob to move the decade cursor. Turn the
selection knob to adjust the value in steps indicated by the decade
selected. Push and hold the selection knob to save the write
enable setting. Push
to restore the previous HART-enable
selection and go to the Main screen.
Figure 19. Password Screen
HART Device Communication
The HART functions are only available in the 709H and 710.
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
• write PV unit
• device diagnostic
• auto trim (710 only)
• trim 4 mA
• trim 20 mA
• set fixed mA output
• PV zero
• modify Tags, Msg, Description
The 710 uses additional HART commands to execute the
Signature, Step, Speed, and Bump/Partial Stroke tests.
PV zero functions can be disabled with the HART Write Enable
selection on the Calibrator Setup menu. See Calibrator Setup
Menu. If these functions are required, they must be enabled before
you enter the HART menus.
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