Emerson Rosemount OCX8800A Manual page 90

Using HART communications
®
December 2022
11. Using Up or Down, select 1 Yes or 2 No and press ENTER.
5.5.2 COe D/A trim using HART
If necessary, refer to
Note
To select a menu item, either use Up and Down to scroll to the menu item and
press Right or use the number keypad to select the menu item number. To return
to a preceding menu, press Left.
Procedure
1. From the DIAG/SERVICE menu, select D/A TRIM.
2. Press Up or Down to select COe D/A TRIM.
3. Press Right to start the procedure.
4. Remove the transmitter from any automatic control loops to avoid a
5. Remove the electronics housing cover.
6. Connect a digital multimeter to read the milliamp output from the COe D/A
7. Press OK. Read the COe milliamp output at the digital multimeter. Enter the
8. Press OK. Read the COe milliamp output at the digital multimeter. Enter the
9. Press OK.
90
The Field Communicator displays Fld dev output 20.00 mA equal to
reference meter?
If No, the process repeats from
The Field Communicator displays NOTE: Loop may be returned to
automatic control.
Figure 5-3
The Field Communicator displays O2 D/A Trim.
If you wish to exit D/A Trim with no changes, select ABORT.
The Field Communicator displays WARNING: Loop should be removed from
automatic control.
potentially dangerous operating condition and press OK.
The Field Communicator displays Connect reference meter to
Combustibles output.
converter circuit. Connect the positive lead to the AOUT2+ terminal and
connect the negative lead to the AOUT2- terminal. Then press OK on the
Field Communicator.
Refer to Figure 2-4, Figure
The Field Communicator displays Setting Fld dev output to 4 mA.
reading in the Field Communicator and press ENTER.
Select ABORT to exit without changes.
The Field Communicator displays Setting Fld dev output to 20 mA.
reading at the Field Communicator and press ENTER.
Select ABORT to exit without changes.
The Field Communicator displays Setting Fld dev output to 4 mA.
The Field Communicator displays Fld dev output 4.00 mA equal to
reference meter?
Step 6.
®
for the HART menu tree.
2-5, and Figure 2-6.
Manual
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