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Xi Advanced Electronics
1-4
Instruction Manual
IM-106-910Xi, Original Issue
November 2010
Automatic Calibration
Calibrations consist of introducing bottled gases of known value into the probe
so the electronics can make automatic adjustments to the O
2
readings to
match the bottled gas value. 0.4% O
2
and 8% O
2
(balance nitrogen) gases
are recommended. Never use nitrogen or instrument air as calibration gases.
Flowmeters (for calibration gases) and regulators and flowmeters (for
reference air) are available as loose components, mounted into an optional
manual calibration switching panel, or as a fully automatic calibration system,
Figure 1-3, where calibration solenoids are switched from the Xi Electronics.
See IM-106-340AC, SPS 4000B Single Probe Autocalibration Sequencer or
IM-106-400IMPS, IMPS 4000 Intelligent Multiprobe Test Gas Sequencer, for
additional details.
Communication Options
Data Communications
An operator can configure and troubleshoot the O
2
Probe system in one of
two ways:
1. Using the Xi Advanced Electronics the Xi carries the following optional
advanced features:
• Fully automatic calibration
• Flame safety interface
• High temperature operation [above 700
°
C (1292
°
F) standard
temperature].
• Stoichiometer feature provides the ability to indicate O
2
efficiency
when the combustion process goes into reducing conditions
(0% O
2
).
• Programmable reference provides enhanced accuracy when
measuring at or near O
2
level (20.95% O
2
).
2. Using the HART Interface. The Xi’s 4-20 mA output line transmits an
analog signal proportional to the oxygen level. The HART output is
superimposed on the 4-20 mA output line. This information can be
accessed through the following:
• Rosemount Analytical Model 375/475 Field Communicator - The
handheld communicator requires Device Description (DD) software
specific to the Xi. The DD software will be supplied with many Model
375/475 units but can also be programmed into existing units at most
Emerson Process Management service offices. See Section 4,
Startup and Operation, for additional information.
• Personal Computer (PC) - The use of a personal computer requires
AMS software available from Emerson Process Management.
• Delta V and Ovation Distributed Control System (DCS) with
AMS-inside capability.
NOTE:
The 375 Field Communicator must be upgraded to System Software 2.0 with
Graphic License for operation with the Xi. The AMS software must be
upgraded to AMS 8.0 or above.
Contact Emerson Process Management’s Global Service Center (GSC) at
1-800-833-8314 to upgrade the 375 Field Communicator software to System
Software 2.0 with Graphic License.