Option Description Setup
Polling The meter polls an external
device for pressure data.
a. Set Pressure Source to Poll for External Value.
b. Set Polling Slot to an available slot.
c. Set Polling Control to Poll as Primary or Poll as Secondary.
Option Description
Poll as Primary No other HART masters will be on the
network. A field communicator is not
a HART master.
Poll as Secondary Other HART masters will be on the
network. A field communicator is not
a HART master.
d. Set External Device Tag to the HART tag of the
temperature device.
Digital
communications
A host writes pressure data to
the meter at appropriate
intervals.
a. Set Pressure Source to Fixed Value or Digital
Communications.
b. Perform the necessary host programming and
communications setup to write pressure data to the meter
at appropriate intervals.
Postrequisites
The current pressure value is displayed in the External Pressure field. Verify that the value is correct.
Need help?
If the value is not correct:
• Ensure that the external device and the meter are using the same measurement unit.
• For polling:
— Verify the wiring between the meter and the external device.
— Verify the HART tag of the external device.
• For digital communications:
— Verify that the host has access to the required data.
— Verify that the host is writing to the correct register in memory, using the correct data type.
• If necessary, apply an offset.
Note
Do not use the offset in conjunction with the fixed pressure value. Enter the adjusted value.
Configure process measurement using ProLink III Configuration and Use Manual
March 2021 MMI-20020954
52 Micro Motion Gas Specific Gravity Meters (SGM)
To Next Page
Loading...
