11. Using Up or Down, select 1 Yes or 2 No. Press ENTER.
If No, the process repeats from step 5.
The Field Communicator displays NOTE: Loop may be returned to
automatic control.
5.6.2 COe D/A trim procedure using HART
Use the following procedure to perform the COe D/A trim procedure using the Field
Communicator.
If necessary, refer to Figure 6-3 for the HART menu tree.
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. Prom the DIAG/SERVICE menu, select D/A TRIM. Press Up or Down to select COe D/A
TRIM.
2. PressRight to start the procedure.
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.
3. Remove the transmitter from any automatic control loops to avoid a potentially
dangerous operating condition and press OK.
The Field Communicator displays Connect reference meter to
Combustibles output.
4. Remove the electronics housing cover.
5. Refer to Figure 2-2. Connect a digital multimeter to read the milliamp output from
the COe D/A converter circuit. Connect the positive lead to the AOUT2+ terminal
and connect the negative lead to the AOUT2- terminal. Then press OK on the HART
Communicator.
The Field Communicator displays Setting Fld dev output to 4 mA.
6. Press OK. Read the COe milliamp output at the digital multimeter. Enter the 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.
Calibration
Reference Manual 81
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