Instruction Manual
IM-106-910C, Rev. 1.0
November 2009
4-23
Hazardous Area
X-STREAM O
2
Transmitter
7. In the first O2 CAL screen, a "Loop should be removed from automatic
control" warning appears. Remove the Hazardous Area X-STREAM O
2
Transmitter from any automatic control loops to avoid a potentially dan-
gerous operating condition and press OK.
8. Follow the handheld 375 Field Communicator display prompts to per-
form the O
2
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 4-10. D/A Trim Methods - Simplified
D/A Trim without Xi
For systems with configuration 1, shown in Figure 4-10, use the handheld 375
Field Communicator to access the D/A trim procedure according to the
instructions that follow. Refer to the 375 Field Communicator Transmitter
Menu Tree in Figure 4-7.
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.
