Emerson Process Management IM-106-910Xi instruction manual Trim with

Xi Advanced Electronics

Instruction Manual

IM-106-910Xi, Original Issue November 2010

Failure to remove the Xi from automatic control loops prior to performing this procedure may result in a dangerous operating condition.

	7. In the first O2 CAL screen, a "Loop should be removed from automatic
	control" warning appears. Remove the Xi from any automatic control
	loop to avoid a potentially dangerous operating condition and press OK.
	8. Follow the handheld 375/475 Field Communicator display prompts to
	perform the O2 cal procedure.
D/A TRIM	The D/A trim procedure is used to calibrate the 4-20 mA output signal to a
	precision mA measurement device.
	The two paragraphs that follow describe how to perform a D/A trim for two of
	the three basic system configurations shown in Figure 4-10. Only the signal to
	the DCS needs to be trimmed.
Figure 4-6. D/A Trim Methods,
Simplified

D/A Trim with Xi	For systems with configuration 1, shown in Figure 4-6, use the handheld
	375/475 Field Communicator to access the D/A trim procedure according to
	the instructions that follow. Refer to the 375/475 Field Communicator Xi Menu
	Tree in Figure 4-2.

1. From the DEVICE SETUP screen select menu item 2, DIAG/SERVICE, to access the diagnostics and service menu options.

2. Select menu item 3, CALIBRATION, to access the calibration menu options.

3. Select menu item 3, 4-20 mA SIG, to access the 4-20 mA SIGNAL screen.

4. Select menu item 1, D/A Trim, to start the trim procedure.

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