Switching Hart Revision - Emerson Rosemount 248 Reference Manual

Reference Manual
00809-0100-4825
Delta = Sensor Specific Constant
To input Callendar-Van Dusen constants, perform one the following procedures:
4.3.1 Using AMS Device Manager
Procedure
1. Right click on the device and select Configure.
2. In the left navigation pane choose Manual Setup and select the Sensor 1 or Sensor
3. Find the Transmitter Sensor Matching (CVD) group box and enter in the required
4. Select Apply when complete.
4.4

Switching HART Revision

Some systems are not capable of communicating with HART Revision 7 devices. The
following procedures list how to change HART revisions between HART Revision 7 and
HART Revision 5.
4.4.1 Switching HART Revision using the generic menu
If the HART configuration tool is not capable of communicating with a HART Revision 7
device, it should load a Generic Menu with limited capability. The following procedures
allow for switching between HART Revision 7 and HART Revision 5 from a generic menu in
any HART compliant configuration tool.
Procedure
Locate the Message field.
a) To change to HART Revision 5, Enter HART5 in the message field.
b) To change to HART Revision 7, Enter HART7 in the message field.
4.4.2 Using AMS Device Manager to switch HART revision
Procedure
1. Right click on the device and select Configure.
2. In the left navigation pane select Manual Setup and click on the HART tab.
3. Select the Change HART Revision button and follow the prompts.
Rosemount 248 Temperature Transmitter Reference Manual
2 tab depending on the need.
CVD constants. Or select "Set CVD Coefficients" button to be guided through steps.
You may also select "Show CVD Coefficients" button to see the current coefficients
loaded into the device.
Note
When the transmitter-senor matching is disabled, the transmitter reverts to either
user or factory trim, whichever was used previously. Make certain the transmitter
engineering units default correctly before placing the transmitter into service.
Operation and Maintenance
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