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Manual
00809-0500-4881
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 potentially
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 reading
8. Press OK. Read the COe milliamp output at the digital multimeter. Enter the reading
9. Press OK.
10. Using Up or Down, select 1 Yes or 2 No. Press ENTER.
11. Press OK.
12. Using Up or Down, select 1 Yes or 2 No. Press ENTER.
Rosemount OCX8800C
Figure 5-2
The Field Communicator displays O
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.
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.
The Field Communicator displays Setting Fld dev output to 4 mA.
in the Field Communicator and press ENTER.
Select ABORT to exit without changes.
The Field Communicator displays Setting Fld dev output to 20 mA.
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?
If No, the process repeats from Step 6.
The Field Communicator displays Setting Fld dev output to 20 mA.
The Field Communicator displays Fld output 20.00 mA equal to reference meter?
If No, the process repeats from Step 9.
The Field Communicator displays NOTE: Loop may be returned to automatic
control.
®
for the HART menu tree.
D/A Trim.
2
Using HART
communications
®
April 2023
77
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