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Manual
00809-0500-4880
5.5
D/A trim procedures
5.5.1
O
2
Refer to 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. From the DIAG/SERVICE menu, select D/A TRIM.
2. Press Right to start the procedure.
3. Remove the transmitter from any automatic control loops to avoid a
4. Remove the electronics housing cover.
5. Connect a digital multimeter to read the milliamp output from the O
6. Press OK. Read the O
7. Press OK. Read the O
8. Press OK.
9. Using Up or Down, select 1 Yes or 2 No and press ENTER.
10. Press OK.
Rosemount OCX8800A
D/A trim using HART
The Field Communicator displays O2 D/A Trim.
If you wish to exit the D/A Trim with no changes, select ABORT.
The Field Communicator displays: WARNING: Loop should be removed
from automatic control.
potentially dangerous operating condtion and press OK.
The Field Communicator displays Connect reference meter to O2 output.
converter circuit. Connect the positive lead to the AOUT1+ terminal and
connect the negative lead to the AOUT1- 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 at 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?
If No, the process repeats from
The Field Communicator displays Setting Fld dev output to 20 mA.
®
Figure
5-3.
2-5, and
Figure
2-6.
miliamp output at the digital multimeter. Enter the
2
miliamp output at the digital multimeter. Enter the
2
Step
5.
Using HART
communications
®
December 2022
D/A
2
89
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