Xi Advanced Electronics
Instruction Manual
IM-106-910Xi, Original Issue November 2010
OPTIONAL ADVANCED FEATURES INSIDE THE Xi
Advanced features available inside the Xi are typically ordered as part of the initial package. However, these advanced features are also available for field retrofit.
A Xi is shipped from the factory with the optional enhanced software features enabled based on the configuration.
The I/O Board is shipped from the factory without any of the enhanced software features activated. These features must be activated once the new board has been installed and before the Remote Interface is put into service.
If the existing I/O Board has been operated with the Stoichiometric enhanced software feature, this feature must be activated in the new board before the Remote Interface is put back into service. Failure to do so will cause a false analog output signal to the DCS.
NOTE
For enhanced software feature option upgrades or to enable the feature to duplicate the existing configuration, contact Emerson Process Management at
6A00269G01 Enhanced Software Option Upgrade, Stoichiometric Function
6A00269G02 Enhanced Software Option Upgrade, Programmable
Reference Function
6A00269G03 Enhanced Software Option Upgrade, 800° C Process
Function
Extended Process Temperature Range to 800° C (1472° F)
The Oxygen Analyzer employs a heater and thermocouple to maintain a temperature setpoint at 736° C (1357° F). Temperature control is maintained within ±1° C to process temperatures of about 705° C (1300° F). This is satisfactory for most applications, but excursions to higher temperatures can occur in some processes. In these instances, the heater is turned off and the process temperature is used to heat the sensing cell.
The oxygen reading is adjusted immediately to compensate for the varying process temperatures. It should be noted that cell life will be reduced by continuous operation at temperatures above 705° C (1300° F). If process temperatures are expected to be continuously above 705° C, we recommend the use of an optional bypass or probe mounting jacket accessory. The extended temperature range feature is selected in the Xi product matrix, but may also be purchased as a field retrofit.
