Xi Advanced Electronics
Instruction Manual
IM-106-910Xi, Original Issue November 2010
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| : EARTH(GROUND) TERMINAL |
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| : PROTECTIVECONDUCT OR TERMINAL |
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| : RISKOFELECTRICAL SHOCK |
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| : WARNING:REFER TOINSTRUCTIONMANUAL |
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| NOTE TO USERS |
| The number in the lower right corner of each illustration in this publication is | ||||
| a manual illustration number. It is not a part number, and is not related to the | ||||
| illustration in any technical manner. | ||||
OVERVIEW |
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The Xi is specifically designed to control a zirconium oxide probe for | |||||
| measuring oxygen, usually the O2 remaining from a combustion process. Call | ||||
| the Rosemount Analytical Customer Support Center (CSC) in Solon, Ohio, to | ||||
| get recommendations for other oxygen probes. | ||||
| Canada). | ||||
| The Xi electronics has several main functions: | ||||
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| 1. Heater Control - The electronics receives a type K thermocouple input | |||
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| from an O2 probe and switches power on and off to the probe's heater in |
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| order to maintain a temperature setpoint of 736 degrees C. |
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| 2. Signal Conditioning - The electronics receives the raw millivolt signal | |||
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| from the O2 sensing cell, then linearizes and amplifies the signal to |
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| provide a linear |
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| into a DCS system for control purposes. |
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| 3. Calibration - A bottled calibration gas of known value is typically flowed | |||
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| into the probe's sensor to verify that it is reading correctly. If the signal is |
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| out of calibration, the calibration gas is used to adjust the |
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| output signal. During calibration the Xi prompts the technician to flow |
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| two calibration gases into the probe and, with the calibration gases |
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| flowing, automatically adjusts the O2 signal. With the addition of a Single |
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| Probe Sequencer (SPS), the Xi electronics can also switch the |
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| calibration gases on and off. |
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| 4. Diagnostics - Multiple alarms are available for display. The alarm | |||
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| displays are intended to assist a technician in locating where an |
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| instrument problem may reside. |
| The Xi electronics has been verified to operate the following probes: | ||||
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| • Westinghouse 218 and World Class | ||
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| • | Rosemount Analytical Oxymitter | |
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| • | Yokogawa | |
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