Reference Manual
00809-0100-4801, Rev FA
October 2010
Rosemount 3051S Series
4-8
Digital-to-Analog Trim Field Communicator
To perform a digital-to-analog trim with a Field Communicator, perform the
following procedure.
1. From the HOME screen, enter the fast key sequence “Digital-to-Analog
Trim.” Select OK after setting the control loop to manual, see “Setting the
Loop to Manual” on page 3-2.
2. Connect an accurate reference milliamp meter to the transmitter at the
CONNECT REFERENCE METER prompt. Connect the positive lead to
the positive terminal and the negative lead to the test terminal in the
transmitter terminal compartment, or shunt power through the reference
meter at some point.
3. Select OK after connecting the reference meter.
4. Select OK at the SETTING FLD DEV OUTPUT TO 4 MA prompt. The
transmitter outputs 4.0 mA.
5. Record the actual value from the reference meter, and enter it at the
ENTER METER VALUE prompt. The Field Communicator prompts you
to verify whether or not the output value equals the value on the
reference meter.
6. Select 1: Yes, if the reference meter value equals the transmitter output
value, or 2: No if it does not.
a. If 1 is selected: Yes, proceed to Step 7.
b. If 2 is selected: No, repeat Step 5.
7. Select OK at the SETTING FLD DEV OUTPUT TO 20 MA prompt, and
repeat Steps 5 and 6 until the reference meter value equals the
transmitter output value.
8. Select OK after the control loop is returned to automatic control.
AMS
Right click on the device and select “Calibrate,” then “D/A Trim” from the
menu
.
1. Click Next after setting the control loop to manual.
2. Click Next after connecting the reference meter.
3. Click Next at the “Setting fld dev output to 4mA” screen.
4. Record the actual value from the reference meter, and enter it at the
“Enter meter value” screen and click Next.
5. Select Yes, if the reference meter value equals the transmitter output
value, or No if it does not. Click Next.
a. If Yes is selected, proceed to Step 6.
b. If No is selected, repeat Step 4.
6. Click Next at the “Setting fld dev output to 20mA” screen.
7. Repeat Step 4 - Step 5 until the reference meter equals the transmitter
output value.
8. Select Next to acknowledge the loop can be returned to automatic
control.
9. Select Finish to acknowledge the method is complete.
Fast Keys
1, 2, 3, 2, 1
Device Dashboard
Fast Keys
3, 4, 2
(12 strony)
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